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Part F Ventilation Compliance
Part F Ventilation Testing Compliance

Part F Ventilation Testing Compliance

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Part F Ventilation Compliance: A Guide for Property Developers

As modern homes become increasingly airtight and energy efficient, effective ventilation has become essential to Building Regulations compliance. For property developers, understanding Part F of the Building Regulations is crucial to ensuring new residential properties provide a healthy indoor environment, avoid costly remedial work and achieve Building Control sign-off without unnecessary delays.

Whether you are building a single dwelling, developing a new housing estate or managing a large apartment scheme, getting ventilation right from the outset is essential.

In this guide, we explain what Part F ventilation compliance involves, why airflow testing is required, the different types of ventilation systems and how developers can ensure their projects pass ventilation testing the first time.

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What Is Part F of the Building Regulations?

Part F of the Building Regulations sets out the ventilation requirements for buildings in England. Its primary purpose is to ensure that adequate fresh air is supplied to occupied spaces while removing excess moisture, airborne pollutants, odours and stale air.

Modern construction techniques place considerable emphasis on energy efficiency, improved insulation and reducing unwanted air leakage. Although these measures help lower energy consumption and carbon emissions, they also reduce the amount of natural air entering a property.

Without an appropriately designed ventilation system, this can lead to poor indoor air quality, condensation and excessive humidity.

Part F addresses these issues by ensuring that residential properties achieve an appropriate balance between:

  • Energy efficiency and building performance.
  • Indoor air quality.
  • Occupant health and comfort.
  • Moisture and condensation control.
  • Long-term building durability.

For developers, compliance is not simply about installing extract fans. Ventilation systems must be correctly designed, installed, commissioned and tested to demonstrate that they deliver the required airflow rates.

Why Is Part F Ventilation Airflow Testing Important?

Developers often concentrate on achieving satisfactory air permeability results under Part L of the Building Regulations. However, improving a property’s airtightness must go hand in hand with providing adequate ventilation.

An airtight home without an effective ventilation strategy can quickly develop problems that affect both the building and its occupants.

Common consequences of inadequate ventilation include:

  • Condensation forming on windows and cold surfaces.
  • Dampness within walls, ceilings and other building elements.
  • Mould growth in bathrooms, bedrooms and living spaces.
  • Excessive indoor humidity.
  • Poor indoor air quality.
  • A build-up of airborne pollutants and unpleasant odours.
  • Uncomfortable living conditions for occupants.

Part F ensures energy-efficient homes also provide a healthy, comfortable indoor environment.

Ventilation airflow testing is therefore an important part of the construction process, providing evidence that the installed ventilation system performs as intended.

View our Part F Ventilation Testing Services

Which Residential Developments Need to Comply with Part F?

Part F applies to a wide range of residential construction projects, including new builds and many conversion projects.

The following types of development commonly require ventilation compliance:

1. New-Build Houses

All new dwellings must demonstrate compliance with the applicable ventilation requirements. Developers must ensure that the ventilation strategy is properly designed, installed and commissioned.

2. Apartment and Flat Developments

Apartment buildings can present additional ventilation challenges because of their layouts, construction methods, and the number of individual dwellings involved.

Each property must have an appropriate ventilation solution that meets the relevant requirements.

3. Housing Association Developments

Housing associations and social housing providers must ensure that newly constructed properties meet the required ventilation standards, helping provide healthy and comfortable homes for residents.

4. Self-Build Properties

Part F compliance is equally important for individual self-build projects. Homeowners and their contractors must ensure that ventilation systems meet the relevant Building Regulations requirements.

5. Residential Conversions

Changes of use, property conversions and refurbishment projects may also require ventilation improvements or compliance assessments, depending on the nature and scope of the work.

Understanding the ventilation requirements early in the project can help avoid unexpected costs and delays later.

What Has Changed Under the Updated Part F Regulations?

Updates to Approved Document F place greater emphasis on providing effective ventilation in modern, increasingly airtight buildings.

Developers and contractors must ensure ventilation systems are not only installed correctly but also properly commissioned and supported by evidence of performance.

Important aspects of the compliance process include:

  • Correct ventilation system commissioning.
  • Verification of extract and supply airflow rates.
  • Providing relevant information to building occupants.
  • Demonstrating that the installed system achieves the required performance.

As a result, ventilation airflow testing has become an increasingly important part of the final stages of residential construction.

What Types of Ventilation Systems Are Used Under Part F?

Approved Document F recognises several different ventilation strategies. The most appropriate solution depends on the property’s design, airtightness, size, and intended use.

The main systems used in residential developments include:

1. Natural Ventilation with Intermittent Extract Fans

This traditional approach combines background ventilation with mechanical extraction in rooms where moisture and pollutants are generated.

It typically includes:

  • Trickle vents within windows.
  • Intermittent extract fans in kitchens and bathrooms.
  • Natural air movement through background ventilators and other designed openings.

This approach remains common across many residential developments.

2. Continuous Mechanical Extract Ventilation (MEV)

Mechanical Extract Ventilation (MEV) systems continuously remove stale, moisture-laden air from designated wet rooms.

Typical extraction points include:

  • Kitchens.
  • Bathrooms.
  • Utility rooms.
  • WCs.

Fresh air enters the property through background ventilators and other designed air inlets, creating a continuous ventilation strategy.

Proper commissioning is essential to ensure the system achieves its intended airflow performance.

3. Mechanical Ventilation with Heat Recovery (MVHR)

Mechanical Ventilation with Heat Recovery (MVHR) is an increasingly popular solution for energy-efficient residential developments.

These systems continuously extract stale air from the property while supplying filtered fresh air to living spaces and bedrooms.

The system recovers heat from the outgoing air and transfers it to the incoming fresh air, helping reduce heat loss.

Key benefits include:

  • Improved energy efficiency.
  • Better indoor air quality.
  • Reduced ventilation-related heat loss.
  • Greater control over indoor air movement.
  • Improved occupant comfort.

MVHR systems are particularly relevant to developers targeting higher levels of energy performance and airtightness.

What Is Part F Ventilation Flow Testing?

Part F ventilation testing establishes whether an installed ventilation system achieves the required airflow rates.

A specialist ventilation testing engineer uses calibrated measurement equipment to assess the volume of air being extracted or supplied through the relevant ventilation terminals.

The testing process helps establish whether:

  • Fans have been installed correctly.
  • Ductwork is performing as intended.
  • Required airflow rates are being achieved.
  • The ventilation system operates effectively.
  • The installation meets the applicable Part F requirements.

Following testing, the results are documented in a formal ventilation test report or certificate for submission to Building Control.

This provides evidence that the installed ventilation system has been tested and assessed against the relevant requirements.

Find Out More About Part F Ventilation Flow Testing

What Are the Required Ventilation Airflow Rates?

Approved Document F specifies minimum ventilation rates for different rooms and ventilation strategies.

For common intermittent extract ventilation arrangements, typical minimum extract rates include:

Kitchen Extraction Rates

  • 30 litres per second where extraction is adjacent to the hob.
  • 60 litres per second where extraction is located elsewhere.

Utility Rooms

  • 30 litres per second.

Bathrooms

  • 15 litres per second.

WCs

  • 6 litres per second.

These are typical figures for the relevant intermittent extract arrangements. Requirements can vary depending on the ventilation system installed and the property’s design, so always check the applicable provisions of Approved Document F.

Getting these airflow rates right is essential to achieve compliance and avoid repeat testing.

Need help preparing for your ventilation test?

Download our Part F Extract Vent Testing Checklist to help ensure your installation is ready for assessment.

How Is Part F Ventilation Testing Carried Out?

Ventilation testing is generally completed towards the end of the construction programme, once the relevant building services have been installed and commissioned.

Before testing takes place, developers should ensure that:

  • Electrical systems are operational.
  • Ventilation fans have been commissioned.
  • Ductwork installations are complete.
  • Internal finishes are substantially finished.

A specialist engineer will then use calibrated airflow measurement equipment to assess the ventilation system.

The process generally involves four stages.

1. Installation Inspection

The engineer reviews the ventilation installation and considers whether the system has been fitted in accordance with the design.

This includes checking relevant fans, ductwork, connections and ventilation terminals.

2. Airflow Measurement

Use calibrated testing equipment to measure actual airflow rates at the relevant extract terminals.

These measurements establish whether the ventilation system is achieving the required performance.

3. Compliance Assessment

The recorded airflow results are compared against the applicable Part F requirements.

Any areas where the system fails to achieve the required rates can then be identified for remedial work.

4. Ventilation Testing Certification

Once testing is complete, the results are recorded in the relevant documentation.

This provides the evidence required to demonstrate ventilation performance to Building Control.

Using an experienced ventilation testing company helps ensure the process is completed efficiently and that any problems are identified before they delay the project.

Common Reasons Why Developments Fail Part F Ventilation Testing

Ventilation testing failures are relatively common on residential developments. Fortunately, many problems stem from straightforward installation or commissioning issues that the right preparation can prevent.

Here are some of the most common reasons why ventilation systems fail to achieve the required airflow rates.

Incorrect Fan Settings

Many extract fans have adjustable speed settings to accommodate different ventilation requirements.

If fans are not commissioned correctly, they may operate below their intended performance, resulting in insufficient airflow.

Crushed or Restricted Flexible Ductwork

Flexible ductwork can easily become damaged or compressed during construction.

Crushed ducting increases resistance within the system, reducing airflow and potentially preventing the fan from achieving the required extraction rate.

Excessively Long Ductwork Runs

Long ductwork routes and unnecessary bends can increase resistance and reduce ventilation performance.

Where possible, design ductwork with efficient routes and minimal restrictions.

Poorly Selected External Ventilation Terminals

Inappropriate external wall grilles, roof terminals and other ventilation outlets can restrict airflow.

Select the correct terminals to minimise resistance and support the required system performance.

General Installation Defects

Poorly fitted connections, air leakage and incorrectly installed ductwork can all affect ventilation efficiency.

Careful installation and inspection are essential to avoid these issues.

Electrical Commissioning Problems

Incorrect wiring or commissioning settings may prevent fans from operating at their intended boost speeds.

This can result in inadequate extraction rates, particularly in kitchens and other rooms with higher ventilation requirements.

Identifying and resolving these problems before the formal testing appointment can save developers considerable time and money.

How Can Developers Avoid Part F Ventilation Testing Failures?

Good preparation is one of the most effective ways to ensure ventilation systems pass testing the first time.

Developers should consider the following practical steps throughout the construction programme.

Consider Ventilation at the Design Stage

Incorporate ventilation into the initial building design rather than treating it as an issue to resolve near project completion.

Early coordination helps ensure the selected system suits the property, and that sufficient space is allowed for fans, ductwork, and ventilation terminals.

Coordinate Mechanical and Electrical Contractors

Ventilation installations often involve several different trades.

Mechanical contractors, electricians and site management teams should work together to ensure that systems are installed and commissioned correctly.

Good communication helps prevent common installation problems.

Protect Ductwork During Construction

Protect ductwork throughout construction to prevent accidental damage, crushing, and blockages.

This is particularly important where other contractors are working within ceiling voids and service areas.

Ensure Ventilation Systems Are Properly Commissioned

Check and commission all fans and ventilation systems to their intended operating settings before the testing engineer arrives.

This helps ensure that airflow rates are achieved during the formal assessment.

Carry Out Pre-Testing Checks

A final inspection before booking ventilation testing can help identify obvious problems, including restricted ductwork, incorrect fan settings and poorly fitted terminals.

Resolving these issues in advance reduces the likelihood of failed tests and repeat visits.

For developers working to tight completion deadlines, effective preparation can make a significant difference.

How Does Part F Work Alongside Part L of the Building Regulations?

Part F and Part L are closely connected and should be considered together when designing and constructing energy-efficient homes.

Although they address different aspects of building performance, both are essential to achieving a compliant and comfortable residential property.

Part L – Conservation of Fuel and Power

Part L focuses on improving energy efficiency and reducing carbon emissions. Its requirements include:

  • Improving building energy performance.
  • Reducing unwanted heat loss.
  • Improving insulation.
  • Controlling air permeability and unwanted air leakage.

Part F – Ventilation

Part F focuses on maintaining adequate ventilation and protecting indoor air quality. Its key objectives include:

  • Providing sufficient fresh air.
  • Removing moisture and pollutants.
  • Maintaining healthy indoor air quality.
  • Supporting occupant health and comfort.

As properties become increasingly airtight to meet Part L requirements, providing effective ventilation under Part F becomes even more important.

A highly airtight home without an appropriate ventilation strategy can experience condensation, moisture problems and poor indoor air quality.

Developers should therefore treat Part F and Part L as complementary Building Regulations requirements, not separate compliance exercises.

Why Choose APT for Part F Ventilation Testing?

At APT, we provide professional ventilation testing and Building Regulations compliance services for property developers, house builders, housing associations, contractors and self-builders throughout the UK.

We understand the pressures of completing residential developments, particularly as Building Control approval and handover deadlines approach.

Our experienced engineers work closely with site teams to carry out ventilation testing efficiently, identify potential issues and provide the necessary certification.

In addition to Part F ventilation testing, APT offers a comprehensive range of Building Regulations compliance services, including:

  • Air Tightness Testing.
  • Sound Insulation Testing.
  • SAP Calculations.
  • EPC Assessments.
  • Acoustic Consultancy Services.

Our combined testing services can help developers streamline the compliance process by using one provider for multiple assessment requirements.

For projects requiring the three key areas of building performance testing, consider our Big 3 Testing Package.

Book Your Part F Ventilation Testing with APT

Whether you are constructing a single new-build property, a housing development or a large apartment scheme, APT can help ensure your ventilation system meets the relevant Part F requirements.

Our professional ventilation testing services offer:

  • Accredited ventilation testing.
  • Fast report turnaround.
  • Nationwide UK coverage.
  • Building Control-ready certification.
  • Competitive fixed pricing.

Contact APT today to discuss your project or arrange a ventilation testing appointment.

Telephone: 01525 303905

Email: info@aptsoundtesting.co.uk

Website: www.aptsoundtesting.co.uk

Get a Part F Ventilation Testing Quote Today

Don’t leave ventilation compliance until the final stages of your development.

Contact APT for professional Part F ventilation testing, practical advice and reliable certification to help keep your project on schedule and moving towards Building Control sign-off.

Pass a Smoke Shaft Air Tightness Test

Pass a Smoke Shaft Air Tightness Test

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How to Pass a Smoke Shaft Air Tightness Test

Smoke shaft airtightness testing has become an increasingly important requirement for residential and commercial developments throughout the UK. Whether you are constructing a high-rise apartment block, mixed-use development, student accommodation scheme, or commercial building, achieving the required smoke shaft leakage rate is essential to demonstrate compliance with fire strategy requirements and obtain project sign-off.

Unfortunately, many smoke shafts fail their initial air leakage test due to relatively simple defects that could have been prevented during construction. Understanding how smoke shafts are tested, where leakage commonly occurs and how to prepare for testing can significantly reduce remedial costs and programme delays.

In this guide, we explain exactly how to pass a smoke shaft air testthe first time.

Pass-smoke-shaft-air-test-with-APT-Sound-Testing-Ltd

What is a Smoke Shaft Air Tightness Test?

A smoke shaft air tightness test measures how much air leaks through a smoke shaft under a specified pressure difference.

Smoke shafts are a critical part of many smoke control systems, providing a protected route for smoke extraction during a fire event. Excessive air leakage can compromise system performance, so smoke shafts must meet the leakage criteria specified by the project’s fire engineer or smoke ventilation designer.

Testing typically uses calibrated air leakage equipment, such as a Retrotec blower door fan system, installed at the base of the smoke shaft. The shaft is then pressurised, and the resulting airflow required to maintain the test pressure is measured.

The test determines whether the smoke shaft achieves the required air leakage performance and complies with the project specification.

Why Do Smoke Shafts Fail Air Leakage Testing?

In our experience at APT Sound Testing, most smoke shaft failures stem not from major design flaws but from relatively minor construction defects.

Common causes of smoke shaft test failures include:

Poorly Sealed Smoke Shaft Access Doors

Smoke shaft access doors frequently represent one of the largest leakage paths.

Common issues include:

  • Damaged door seals
  • Missing compression gaskets
  • Poorly adjusted door closers
  • Distorted door frames
  • Gaps around door ironmongery

Even a small gap around multiple doors can create significant leakage during testing.

Incomplete Service Penetration Sealing

Every service penetration through the smoke shaft enclosure must be properly fire-stopped and air-sealed.

Examples include:

  • Electrical containment
  • Fire alarm cabling
  • Builder’s work openings
  • Mechanical fixing penetrations

Seemingly insignificant gaps can significantly affect overall air leakage rates.

Defective Drywall Junctions within smoke shafts

Air leakage frequently occurs where walls, floors and ceiling elements meet.

Inspect:

  • Board joints
  • Movement joints
  • Ceiling interfaces
  • Head details
  • Floor slab connections

Any discontinuity within the smoke shaft lining system can contribute to test failure.

Smoke Vent Interfaces

Check smoke ventilator units and Automatic Opening Vents (AOVs) carefully before testing.

Failures can result from:

  • Poor actuator adjustment
  • Damaged seals
  • Incomplete closure
  • Manufacturing defects
  • Incorrect installation

Preparing for a Smoke Shaft Air Tightness Test

The best way to pass a smoke shaft test is through robust preparation.

Complete All Installation Works

Testing should only be undertaken once all elements of the shaft are complete, including:

  • Access doors installed
  • Fire stopping completed
  • Smoke vents commissioned
  • Penetrations sealed
  • Building works finished

Testing too early often results in avoidable failures.

Undertake a Visual Inspection

Before booking a test, carry out a detailed walk-through.

Look for:

  • Missing sealant
  • Unsealed penetrations
  • Damaged doors
  • Gaps in drywall
  • Open service entries

Addressing these items beforehand can save high costs later.

Perform Preliminary Leakage Checks

Many contractors now request smoke shaft diagnostic testing before the formal compliance test.

Using smoke machines/pencils, thermal imaging equipment and pressure diagnostics can quickly identify leakage paths before undertaking the final test.

This approach often dramatically improves first-time pass rates when testing the airtightness of a smoke shaft in multi-storey buildings.

Best Practice Construction Tips

Contractors aiming for first-time pass should focus on creating a continuous airtight barrier throughout the smoke shaft.

Treat the Smoke Shaft Like an Airtight Box

Treat every element forming the shaft enclosure as part of the air barrier.

Ask yourself:

“If I pressurise this shaft, can air escape through this area?”

If the answer is yes, you may need further sealing.

Focus on Junctions

Most leakage occurs at interfaces rather than within primary construction elements.

Pay particular attention to:

  • Wall-to-floor junctions
  • Wall-to-ceiling junctions
  • Door interfaces
  • AOV interfaces
  • Builder’s work holes

Protect Seals During Construction

Completed smoke shafts often suffer damage during later trades.

Protect:

  • Door gaskets
  • Fire stopping
  • Sealant lines
  • Smoke vents

Conduct a final inspection immediately before testing.

What Happens During Smoke Shaft Testing?

A qualified testing engineer will install calibrated air leakage equipment at the smoke shaft opening.

The smoke shaft is then subjected to a series of pressure measurements.

The engineer will:

  1. Measure shaft dimensions.
  2. Install the blower door system.
  3. Connect pressure measurement equipment.
  4. Conduct pressure testing.
  5. Record airflow rates.
  6. Analyse the results.
  7. Produce a formal test report.

The report will confirm whether the smoke shaft complies with the specified leakage criteria.

How to Improve First-Time Pass Rates

The most successful contractors adopt a proactive approach.

We recommend:

✅ Engaging with the testing company early.

✅ Reviewing fire strategy leakage requirements before construction begins.

✅ Inspecting smoke shaft works regularly.

✅ Sealing penetrations immediately after installation.

✅ Carrying out pre-test quality inspections.

✅ Undertaking diagnostic testing where possible.

These simple measures can dramatically reduce the risk of failure.

FAQ for Passing Smoke Shaft Testing

What is a smoke shaft airtightness test, and why is it important?

A smoke shaft air tightness test measures the amount of air leakage through a smoke shaft when subjected to a specified pressure difference. It is important because excessive leakage can compromise the smoke control system’s performance and prevent project sign‑off, ensuring the shaft meets the leakage criteria set by the fire engineer or smoke ventilation designer.

Why do smoke shafts often fail air leakage testing?

Most failures arise from relatively minor construction defects rather than major design flaws. Common causes include poorly sealed access doors, incomplete service penetration sealing, defective drywall junctions, and issues with smoke vent interfaces such as actuator adjustment or damaged seals.

What should be done to prepare for a smoke shaft air tightness test?

Prepare by completing all installation work, conducting a thorough visual inspection for missing sealant, unsealed penetrations, damaged doors and drywall gaps, and addressing open service entries. Perform preliminary leakage checks with diagnostic tools to identify leakage paths before the formal test.

What happens during the actual smoke shaft test?

A qualified testing engineer installs calibrated equipment at the shaft opening, pressurises the shaft, records airflow rates, measures shaft dimensions, and conducts pressure tests. A formal test report confirms whether the shaft complies with the specified leakage criteria.

How can first-time pass rates be improved?

Adopt a proactive approach: engage the testing company early, review leakage requirements before construction, inspect works regularly, seal penetrations promptly, perform pre-test quality inspections, and where possible carry out diagnostic testing to identify and remediate leakage paths before the formal test.

Why Choose APT Sound Testing?

APT Sound Testing provides independent smoke shaft air tightness testing services throughout the UK.

Using UKAS-calibrated equipment and industry-recognised testing methodologies, we help contractors, developers and smoke control specialists demonstrate compliance efficiently and cost-effectively.

Our experienced engineers provide practical on-site guidance both before and during testing, helping clients identify potential issues before they impact programme delivery.

Whether your project involves a single smoke shaft or multiple shafts within a large high-rise development, APT Sound Testing provides reliable testing, fast reporting, and responsive technical support to help you pass your smoke shaft air test on the first attempt.

Thermal Imaging Inspections
Thermal Imaging Inspections

Thermal Imaging Inspections

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Thermal Imaging Inspections Can Save You Money

When it comes to looking after a building, finding problems early can save a lot of money.

Thermal imaging inspections are a practical way to identify issues that might otherwise go unnoticed. Using infrared technology, a thermal imaging survey can highlight areas of heat loss, electrical hotspots, moisture and insulation defects — often before there are any obvious signs of a problem.

For property owners, facilities managers, and building professionals, this means addressing potential issues before they develop into expensive repairs.

Where can thermal imaging save you money?

Thermal imaging isn’t just about taking pictures with a specialist camera. When an experienced thermographer carries it out, it provides valuable information about how a building or system is performing.

Here are some of the main ways a thermal imaging inspection can help reduce costs.

1. Finding heat loss and improving energy efficiency

One of the most useful applications of thermal imaging is identifying areas where heat is escaping through the building envelope.

A thermal survey can highlight problems such as:

  • Missing or poorly installed insulation
  • Thermal bridging
  • Gaps around windows and doors
  • Defects in the building envelope
  • Areas where heat is escaping through walls, roofs or other elements

Once these areas have been identified, targeted repairs can be carried out rather than relying on guesswork.

For example, a commercial building may appear to be adequately insulated, but a thermal survey could reveal significant heat loss around sections of the façade or roof. Addressing those areas can improve comfort and reduce the energy needed to heat the building.

Over time, even relatively small improvements can make a noticeable difference to energy costs, particularly in larger commercial properties.

2. Identifying electrical problems before they become dangerous

Thermal imaging can also play an important role in electrical safety.

Electrical systems can develop hotspots because of loose connections, overloaded circuits, damaged components or other faults. These problems aren’t always visible during a conventional visual inspection, but an infrared camera can identify abnormal temperature patterns.

Finding a hotspot early allows engineers to investigate and repair the problem before it develops into a more serious failure.

This can be particularly valuable in buildings where electrical systems are critical to day-to-day operations, including offices, hospitals, factories, retail premises and data centres.

In some cases, identifying an overheating component early could prevent equipment failure, costly downtime or, more seriously, an electrical fire.

3. Finding hidden moisture, leaks and insulation defects

Some building problems are difficult to spot until they’ve already caused significant damage.

Thermal imaging can help identify temperature differences associated with potential moisture ingress, leaks or missing insulation. While thermal imaging doesn’t replace other diagnostic methods, it can be a very useful first step in locating areas that require further investigation.

For example, a small water leak behind a wall may not be immediately visible. By the time staining or mould becomes apparent, the problem could have been developing for some time.

Finding the affected area earlier can allow repairs before the damage becomes more extensive — potentially avoiding much more expensive remedial work.

4. Reducing unnecessary energy consumption

Improving a building’s thermal performance isn’t just about making it warmer in winter.

If heat escapes through poorly insulated areas, gaps, or defective parts of the building envelope, heating systems have to work harder to maintain the desired temperature.

A thermal imaging survey can help identify where improvements will have the greatest impact.

Rather than insulating or sealing an entire building, you can use the survey findings to focus on the areas that actually need improvement.

The result can be a more comfortable building, reduced energy consumption and lower running costs.

5. Preventing expensive repairs and downtime

Perhaps the biggest financial benefit of thermal imaging is its ability to support preventative maintenance.

A small fault can become a major problem if left untreated.

Consider a manufacturing facility with critical electrical equipment. If a thermal survey identifies an overheating component, teams can investigate and repair it during planned maintenance. If that same component fails unexpectedly, the consequences could include equipment damage, emergency repairs and significant production downtime.

The same principle applies to buildings.

Finding a problem early is usually much cheaper than dealing with the consequences of a major failure.

6. Protecting critical equipment and infrastructure

Thermal imaging can inspect a wide range of critical assets, including electrical installations, machinery, batteries, and server rooms.

These environments often contain equipment that needs to operate reliably around the clock. An unexpected temperature increase can sometimes be an early warning that something isn’t working as it should.

By regularly monitoring critical areas, building owners and facilities teams can spot unusual thermal patterns and investigate them before they cause equipment failure.

For businesses, avoiding unplanned downtime can be just as important as reducing energy costs.

What does a professional thermal imaging inspection involve?

The quality of a thermal imaging survey depends on much more than the camera being used.

A good inspection requires an experienced thermographer who understands how buildings and systems behave and, importantly, how to interpret what the camera is showing.

At APT Sound Testing, we provide professional infrared inspection services that go beyond the requirements typically specified by BREEAM.

Our thermographers hold Level 3 thermographic certification, the highest level available, and we use professional, calibrated equipment to deliver detailed, reliable surveys.

Our thermal imaging inspections include:

  • Level 3 thermographic certification
  • Large-format FLIR thermal imaging cameras
  • Fully calibrated equipment
  • Detailed thermal imaging reports
  • Thermal indexing and fault diagnosis
  • Qualification and severity grading of identified anomalies

The aim isn’t simply to produce a collection of thermal images. We interpret the findings and provide information you can use to make informed decisions about maintenance, repairs, and building performance.

Why experience matters

Thermal imaging can be extremely powerful, but interpreting a thermal image isn’t always straightforward.

Environmental conditions, materials, surface emissivity, reflections, and the building’s condition can all influence what the camera detects. That’s why experience and professional training matter.

Our approach is to look beyond the image itself and understand what may be causing the thermal anomaly.

We also explain our findings in straightforward language. A technical report is only useful if the people responsible for the building can understand what it means and what action, if any, is needed.

Thermal imaging as part of a proactive maintenance strategy

Building maintenance doesn’t have to be reactive.

Instead of waiting for equipment to fail, energy bills to increase or visible signs of building defects to appear, thermal imaging can form part of a proactive inspection and maintenance programme.

Regular surveys can help you:

  • Identify developing problems earlier
  • Prioritise maintenance work
  • Reduce unnecessary energy consumption
  • Improve building comfort
  • Protect electrical and mechanical equipment
  • Reduce the risk of unexpected failures
  • Avoid potentially expensive remedial work

For larger buildings and complex facilities, this proactive approach can provide valuable long-term savings.

How can thermal imaging benefit your building?

Whether you’re responsible for a commercial property, residential development, industrial facility or public building, thermal imaging can provide an additional layer of information that isn’t available through a standard visual inspection.

It can help answer important questions about how your building is performing:

Where is heat being lost?

Are there areas of missing or defective insulation?

Are electrical components showing signs of overheating?

Could there be hidden moisture or leaks?

Are critical assets operating at abnormal temperatures?

The answers can help you decide where to focus maintenance and investment —rather than relying on assumptions.

Arrange a thermal imaging inspection.

If you’d like to learn more about how thermal imaging works or discuss whether a thermal imaging survey would suit your building, get in touch with our team.

Email info@aptsoundtesting.co.uk or call APT Sound Testing on 07775 623464.

We’ll be happy to discuss your requirements and explain how a thermal imaging inspection can help improve building performance, safety, and energy efficiency.

BS8233 Noise Assessments
BS 8233 Noise Surveys & Assessments

BS 8233 Noise Surveys & Assessments

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BS 8233 Noise Surveys & Assessments for Planning Applications

If you are planning a new residential development, care home, student accommodation, hotel or mixed-use scheme, your Local Planning Authority (LPA) may require a noise assessment to demonstrate that future occupants will be adequately protected from environmental noise.

A BS 8233 Noise Assessment can help establish whether suitable internal and external noise conditions can be achieved and, where necessary, identify appropriate acoustic mitigation measures.

At APT Sound Testing, we undertake BS 8233 noise surveys and assessments throughout the UK, helping developers, architects, planning consultants and landowners meet planning requirements and create comfortable acoustic environments for future occupants.

What Is a BS 8233 Noise Assessment?

BS 8233:2014 – Guidance on sound insulation and noise reduction for buildings provides recommendations for acoustic conditions within residential and other noise-sensitive buildings.

A BS 8233 assessment considers existing and, where relevant, proposed noise sources around a development. These may include:

  • Road traffic
  • Railways
  • Aircraft
  • Commercial and industrial activities
  • Mechanical plant and building services
  • Pubs, restaurants and entertainment venues
  • Distribution centres and service yards
  • Other environmental noise sources

The assessment considers whether appropriate internal noise levels can be achieved within noise-sensitive rooms, such as bedrooms and living areas.

It may also consider external amenity areas, including gardens, balconies, roof terraces and communal spaces, where these form part of the development.

Why Is a BS 8233 Assessment Required?

A Local Planning Authority may request a noise assessment where a proposed development is located close to significant sources of environmental noise.

Typical examples include developments close to:

  • Main roads and motorways
  • Railway lines and stations
  • Industrial estates
  • Commercial premises
  • Distribution and logistics centres
  • Public houses and restaurants
  • Entertainment venues
  • Airports and flight paths

The purpose of the assessment is to demonstrate that noise has been appropriately considered as part of the development. It also shows that suitable acoustic measures can be incorporated into the building design where required.

A well-prepared assessment can also help planning officers and Environmental Health teams understand the site’s potential noise impact and the measures proposed to control it.

Related Acoustic Services

What Information Is Required for a BS 8233 Noise Assessment?

To prepare an accurate assessment, we normally require information about the site, proposed development and relevant planning requirements.

Providing as much information as possible at the outset can help us establish the scope of the assessment and provide an accurate quotation.

1. Site Address and Location Plans

We normally require:

  • Full site address
  • Site boundary plan
  • Site location plan
  • Planning application reference, where available

This information allows us to identify the development location, surrounding land uses and potential noise sources, as well as determine suitable positions for environmental noise monitoring.

2. Architectural Drawings

Where available, please provide:

  • Proposed site layout
  • Floor plans
  • Elevation drawings
  • Building sections
  • Roof plans, where applicable

The drawings help us identify noise-sensitive rooms and determine which façades are likely most exposed to external noise.

PDF drawings are normally suitable, although DWG files can also be useful where detailed acoustic design information is required.

3. Details of Noise-Sensitive Rooms

The assessment may need to consider the internal rooms most affected by external noise.

These can include:

Bedrooms

  • Main bedrooms
  • Secondary bedrooms
  • Guest bedrooms

Living Areas

  • Living rooms
  • Open-plan kitchen and living areas
  • Dining areas

Other Habitable Rooms

  • Home offices
  • Studies
  • Lounges

The location and use of these rooms can influence the acoustic performance required from the building envelope, including glazing and ventilation systems.

4. External Amenity Areas

Where applicable, external amenity areas may also nrequire consideration

Please provide details of:

  • Private gardens
  • Balconies
  • Roof terraces
  • Shared courtyards
  • Communal gardens
  • Other external amenity spaces

We can assess the likely acoustic conditions within these areas and advise on appropriate mitigation where required.

5. Planning Conditions and Environmental Health Comments

Planning documents and correspondence from the Local Authority can be particularly useful when determining the scope of a noise assessment.

Where available, please provide:

  • Planning decision notices
  • Noise-related planning conditions
  • Local Authority consultation responses
  • Environmental Health comments
  • Requests for further acoustic information

These documents help ensure the assessment addresses the planning authority’s specific requirements.

Related Service: Planning Condition Discharge Reports

6. Proposed Building Construction

Where available, we also require information about the proposed building envelope and construction.

This may include:

Glazing

  • Double glazing
  • Triple glazing
  • Acoustic glazing
  • Proposed glazing specifications

Ventilation

  • Openable windows
  • Trickle ventilators
  • Mechanical ventilation
  • Mechanical ventilation with heat recovery (MVHR)

External Walls

  • Masonry construction
  • Timber frame
  • Lightweight façade systems
  • Other proposed wall constructions

This information helps determine whether the proposed building specification can achieve the required internal acoustic conditions.

Where necessary, APT Sound Testing can also provide advice on building acoustic design and suitable mitigation measures.

7. Existing and Proposed Noise Sources

Information about existing and proposed noise sources can also assist the assessment.

Examples include:

  • Industrial activities
  • Commercial premises
  • Existing plant and machinery
  • Service yards
  • Loading bays
  • Delivery areas
  • Public houses and restaurants
  • Entertainment venues
  • Proposed mechanical services plant

Where new or existing commercial or industrial plant is a significant noise source, a separate assessment under BS 4142 may also be appropriate.

Related Service: BS 4142 Noise Assessments

8. Access for Environmental Noise Monitoring

Depending on the site and planning requirements, you may need an attended or unattended environmental noise survey.

To arrange monitoring, we may need:

  • Site access details
  • A site contact
  • Information about suitable monitoring locations
  • Security arrangements where monitoring equipment is left unattended

APT Sound Testing can advise on suitable monitoring positions to help ensure the measurements represent the site’s acoustic environment.

What Happens After We Receive the Information?

Once you provide the required information, our acoustic consultants will review the proposed development and determine the appropriate assessment methodology.

Depending on the project, the process may include:

  1. Reviewing the proposed development and architectural drawings.
  2. Identifying existing and potential future noise sources.
  3. Carrying out environmental noise monitoring where required.
  4. Assessing the measured or predicted noise levels against relevant BS 8233 guidance.
  5. Assessing the proposed building envelope and acoustic design.
  6. Recommending mitigation measures where necessary.
  7. Preparing a comprehensive BS 8233 Noise Assessment Report for submission to the Local Planning Authority.

What Acoustic Mitigation Measures May Be Required?

Where external noise levels are significant, the assessment may identify the need for additional acoustic measures.

Depending on the development, these could include:

  • Enhanced acoustic glazing
  • Improved façade specifications
  • Alternative ventilation strategies
  • Acoustic trickle ventilators
  • Mechanical ventilation or MVHR
  • Acoustic barriers
  • Revised building orientation
  • Changes to room layouts
  • Improvements to external building elements

The appropriate solution will depend on the site’s noise environment, proposed development and architectural design.

Early acoustic input can therefore be valuable, particularly where a site is exposed to significant road, rail, commercial or industrial noise.

Why Choose APT Sound Testing?

APT Sound Testing provides BS 8233 Noise Assessments and environmental noise surveys across England, Wales and Scotland.

Our acoustic consultants work with:

  • Property developers
  • Architects
  • Planning consultants
  • Main contractors
  • Landowners
  • Property professionals

Our services include:

  • BS 8233 Noise Assessments
  • Environmental Noise Surveys
  • Planning Noise Reports
  • BS 4142 Noise Assessments
  • Noise Impact Assessments
  • Sound Insulation Testing
  • Building Acoustics Consultancy
  • Acoustic Design Advice

We aim to provide practical, proportionate and cost-effective acoustic solutions that can be incorporated into the design and planning process.

When Should You Arrange a BS 8233 Assessment?

Ideally, address acoustic considerations as early as possible in the planning and design process.

An early assessment can help identify potential noise issues before the building design is finalised. This makes it easier to incorporate suitable glazing, ventilation, façade construction, and other mitigation measures without requiring significant changes later.

If the Local Planning Authority or Environmental Health Department has already requested an acoustic assessment, providing the relevant planning correspondence and drawings will help us establish exactly what information is required.

Contact APT Sound Testing

If you require a BS 8233 Noise Assessment, environmental noise survey or planning noise report, APT Sound Testing can help.

Our acoustic consultants can review your proposed development, drawings and planning requirements and provide a quotation for the assessment.

We can also provide sound insulation testing at the appropriate stage of your project to assess the acoustic performance of separating walls and floors.

Contact APT Sound Testing for a BS 8233 Noise Assessment

APT Sound Testing provides:

  • BS 8233 Noise Assessments
  • Environmental Noise Surveys
  • Planning Noise Reports
  • BS 4142 Noise Assessments
  • Noise Impact Assessments
  • Acoustic Consultancy and Design Advice

Whether you need a noise assessment to support a planning application, discharge a planning condition or assess environmental noise affecting a proposed development, our experienced acoustic consultants can advise on the most appropriate approach.

APT Sound Testing Ltd

Telephone: 01525 303905
Email: info@aptsoundtesting.co.uk
Website: aptsoundtesting.co.uk

When contacting us, please provide the following information where available:

  • Site address
  • Site location plan
  • Proposed architectural drawings
  • Planning application reference
  • Planning conditions
  • Environmental Health comments
  • Details of the proposed development

Providing this information at the outset will allow our consultants to review the project and provide the most appropriate advice and quotation.

Air Tightness Testing
A Guide to Air Tightness Testing

A Guide to Air Tightness Testing

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Your Guide to Air Tightness Testing: What You Need to Know

A well-designed building should be comfortable, energy efficient, and able to keep unwanted air leakage under control. One of the most effective ways to assess how well a building achieves this is through air tightness testing.

At APT Sound Testing, we provide professional air tightness testing throughout the UK, working across everything from individual homes and housing developments to large commercial buildings. We are one of the few UKAS-accredited companies able to carry out both air and sound testing to the relevant Building Regulations and standards.

Because our engineers are qualified to carry out multiple types of testing, we can often complete air, sound and ventilation testing during the same visit. This can help reduce costs, minimise disruption and make coordinating different testing requirements much easier.

What Is Air Tightness Testing?

Air tightness testing, also known as an air permeability test or blower door test, measures uncontrolled air leakage through a building’s envelope.

While every building needs adequate ventilation, unwanted air movement through gaps, cracks and poorly sealed joints can waste energy. These unintended openings often feel like draughts.

During an airtightness test, specialist blower-door equipment pressurises or depressurises the building. The equipment measures how much air is required to maintain a specific pressure difference between the inside and outside.

This allows the building’s air leakage rate to be calculated.

The more airtight a building is, the less conditioned air it loses unnecessarily. Improving airtightness can therefore help reduce energy consumption, lower carbon emissions and reduce the demand placed on heating, cooling and mechanical ventilation systems.

Why Is Air Tightness Testing Important?

Air tightness testing became a legal requirement for many new buildings in England and Wales in 2006 under Part L of the Building Regulations.

Part L focuses on conserving fuel and power and includes requirements for buildings’ energy performance and air permeability. For domestic projects, Part L1A generally applies to new dwellings, while Part L2A covers new non-domestic buildings.

The required air permeability target depends on the building type and its design. A common target for a standard dwelling is around 5.0 m³/hr/m² at 50 Pa, but the required figure depends on the specific project. Commercial buildings can have significantly lower target air permeability rates, often around 3.0 m³/hr/m² or below.

Meeting the target is important for Building Control approval and for demonstrating that a building was constructed in accordance with its design requirements.

Where Does Air Leakage Occur?

Air leakage can occur almost anywhere there is an unintended gap or break in the building envelope.

Common problem areas include:

  • Windows and doors
  • Service penetrations
  • Floor and wall junctions
  • Roof and ceiling junctions
  • Electrical sockets and fittings
  • Pipe and cable penetrations
  • Ventilation systems
  • Poorly sealed joints
  • Gaps between construction materials

The challenge is that individual leaks are not always easy to spot. A building can have dozens or even hundreds of relatively small leakage paths that, collectively, significantly affect its overall air permeability.

This is why testing during construction can be so valuable. Identifying problems before a project is complete gives contractors a chance to fix them while access is still available.

Air Leakage, Condensation and Moisture

Poor airtightness isn’t only about energy efficiency.

In colder weather, warm, moist indoor air can pass through gaps in the building fabric and reach colder areas within walls, floors, or roofs. Depending on the building’s construction and environmental conditions, this can contribute to condensation and potentially lead to mould, damp or deterioration of building materials.

During warmer or more humid periods, unwanted infiltration can also introduce humid outdoor air into a building.

A properly designed and constructed air barrier helps control where air enters and leaves the building. This makes it easier to manage energy use, occupant comfort, and moisture movement.

How Much Heat Can Be Lost Through Air Leakage?

The amount of heat lost through air leakage varies considerably depending on the building, its construction and the extent of the leakage.

Poor airtightness can significantly increase heat loss and the energy required to maintain comfortable indoor temperatures. In some poorly performing buildings, uncontrolled air leakage can account for a substantial proportion of overall heat loss.

An air tightness test provides measurable information about a building’s performance rather than relying on assumptions.

What Does an Air Tightness Test Tell You?

A blower door test does more than provide a pass-or-fail result.

The test measures how much air moves through the building at a known pressure difference. This provides useful information about how effectively the building envelope performs and can help identify areas that need further investigation.

Finding Air Leakage Paths

One of the biggest benefits of air tightness testing is identifying where unwanted air enters or escapes.

At APT Sound Testing, our engineers can use techniques such as smoke testing alongside blower door testing to help locate leakage paths.

Sometimes a single large gap causes a poor result. More commonly, however, numerous smaller defects spread throughout the building cause overall air leakage.

Finding these issues before completion allows contractors to seal them and improve the building’s performance before the final test.

Improving Energy Efficiency

When conditioned air escapes a building, replacement air must be heated or cooled.

The greater the uncontrolled air leakage, the greater the potential energy requirement. Air tightness testing can therefore provide valuable information when assessing energy consumption, heating and cooling requirements and overall building performance.

Improving Occupant Comfort

Draughts can noticeably affect the comfort of people using a building.

Cold air entering through unintended gaps can create uncomfortable conditions, particularly in homes, offices and other occupied spaces.

We have previously investigated buildings where occupants were experiencing significant comfort problems. In one case, testing identified an air leakage rate of approximately 25 m³/hr/m². Once we identified and sealed the leakage paths, the building achieved an air permeability below 5 m³/hr/m², significantly improving performance.

Reducing the Risk of Moisture Problems

Uncontrolled air movement can carry moisture through parts of the building fabric. Depending on the construction, this can contribute to condensation and other moisture-related problems.

Good air barrier design and careful construction can reduce these risks by controlling where air can move through the building envelope.

Controlling Outdoor Pollutants

Air leakage can also allow outdoor pollutants to enter a building through uncontrolled routes.

This is particularly important for properties close to busy roads, garages, commercial premises, restaurants, or other potential pollution sources.

A well-designed, properly constructed air barrier helps control where outdoor air enters a building.

When Should You Carry Out an Airtightness Test?

Although the final air tightness test is normally carried out before completion, consider airtightness from the earliest stages of a project.

Consider the building’s air leakage strategy alongside the construction details. Everyone involved in the project should understand where the air barrier is located and how to maintain it around junctions, openings, and service penetrations.

Why Early Testing Matters

Early-stage testing can be extremely useful.

If an initial test identifies problems while the construction team is still on site, they can usually repair leakage paths much more easily than after the building is complete.

Early testing can therefore help prevent last-minute remedial work, delays, and unexpected costs.

Air Tightness Consultancy and Design Reviews

At APT Sound Testing, our involvement doesn’t have to begin on the day of the final test.

We provide air tightness consultancy and design reviews to help clients identify potential problems before they become expensive to fix.

Our engineers can work with project teams throughout the design and construction process, providing practical advice on reducing unwanted air leakage and achieving the required target.

Our experience across a wide range of residential and commercial developments means we understand the practical challenges that can affect air permeability results.

We can also help contractors prepare for testing, including with our air tightness checklist.

Combine Air and Sound Testing to Save Time and Money

Another advantage of working with APT Sound Testing is that our UKAS-accredited engineers can carry out both air and sound testing.

This means we can often combine multiple testing requirements into a single planned visit.

For many projects, our clients use our three-step pre-completion testing package, which reduces the need to coordinate several different testing companies.

Combining tests can offer:

  • Reduced testing costs
  • Fewer site visits
  • Less disruption to the construction programme
  • Easier site coordination
  • A single point of contact for multiple testing requirements

Where required, we can also arrange out-of-hours testing, including Saturdays and Sundays. This can be particularly useful on busy commercial developments where testing during normal working hours could disrupt other trades or occupants.

Why Choose APT Sound Testing?

We have extensive experience carrying out air tightness testing on developments throughout London and across the UK.

Our team understands both the Building Regulations requirements and the practical challenges involved in achieving an airtight building.

Rather than arriving only to carry out a final test, we can work with your project team throughout design and construction to help identify potential problems before they become costly issues.

Whether you need a final compliance test, early-stage testing, leakage investigation or advice on air barrier design, our experienced engineers can help.

Need Air Tightness Testing for Your Project?

If you’re planning a new residential or commercial development and need advice on airtightness testing, speak to the APT Sound Testing team.

We can discuss your project, explain what testing is required and help you plan for a successful result.

Need help preparing for your air tightness test? Contact our team on 01525 303905 or use our online contact form.

Sound Insulation Testing
Part E Sound Insulation Testing

Part E Sound Insulation Testing

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Part E Sound Testing: A Guide to Building Regulations Sound Insulation Testing

If you’re building new homes, converting an office into flats, or developing residential accommodation, Part E sound testing is likely to be an important part of your project.

For many residential developments, Building Control requires sound insulation testing before signing off the work. Leaving it until the last minute can cause unnecessary delays, particularly if a test highlights an issue that needs remedial work.

At APT Sound Testing, our UKAS-accredited engineers carry out sound insulation testing across the UK. We work with house-builders, developers, contractors, housing associations, and private clients to help ensure their projects meet Building Regulations Part E requirements.

GET A FAST PART E SOUND TESTING QUOTE

UKAS Accredited • Nationwide Coverage • Full Coverage

Part E Sound Testing being undertaken in London, UK by APT Sound Testing Acoustic Engineers

What is Part E Sound Testing?

Part E of the Building Regulations covers the Resistance to the Passage of Sound. Its purpose is to ensure people in adjoining homes are adequately protected from noise travelling through separating walls and floors.

Approved Document E sets out the official requirements.

Part E sound testing, also known as sound insulation testing, acoustic testing, or pre-completion sound testing, demonstrates that the separating walls and floors within a development provide the required level of sound insulation.

There are two main types of sound insulation measurement.

Airborne Sound Insulation

Airborne testing looks at how effectively a wall or floor prevents airborne noise from passing between adjoining rooms or properties.

This includes everyday sounds such as:

  • Speech
  • Television
  • Music
  • General household noise

Impact Sound Insulation

Impact testing primarily assesses floors and measures how much impact noise travels between properties.

Typical examples include:

  • Footsteps
  • Objects being dropped
  • Furniture being moved

Depending on the development type, both airborne and impact testing may be required.

When is Part E Sound Testing Required?

The exact testing requirements depend on the project type and the applicable Building Regulations. However, sound insulation testing is commonly required for many residential developments.

New Build Flats and Apartments

New-build apartment developments generally require sound insulation testing between adjoining dwellings before completion.

Testing helps demonstrate that the separating walls and floors have achieved the required acoustic performance.

Building Conversions

Converting an existing building into residential accommodation can also trigger Part E requirements.

This can include:

  • Office-to-residential conversions
  • Commercial-to-residential conversions
  • Barn conversions
  • Factory or industrial building conversions
  • Mixed-use developments

Each project’s construction and circumstances differ, so it is worth confirming the testing requirements with Building Control early.

HMOs

Some Houses in Multiple Occupation (HMOs) may also require sound testing, depending on the accommodation type and Building Control requirements.

Student Accommodation

Purpose-built student accommodation and other residential developments with multiple adjoining rooms or units may also require acoustic testing as part of the building compliance process.

Why is Part E Sound Testing Important?

Sound testing is not simply a box-ticking exercise. Poor acoustic performance can significantly affect the people who eventually live in a building.

From a construction perspective, a failed test can also create problems at the worst possible time — when a project is approaching completion.

Potential consequences include:

  • Delays to Building Control sign-off
  • Additional remedial acoustic work
  • Increased project costs
  • Delayed occupation
  • Delayed property sales or handovers
  • Frustration for contractors, developers and future occupants

This is why arranging testing at the right stage of the build is so important.

If possible, consider acoustic requirements during design and construction rather than waiting until the development is ready for handover.

Part E Sound Test Pass by APT Sound Testing Ltd

How is Part E Sound Testing Carried Out?

Part E testing is carried out by suitably qualified and experienced acoustic engineers using calibrated acoustic equipment.

The exact procedure depends on whether the test assesses airborne or impact sound insulation.

Airborne Sound Testing

For an airborne sound test, a loudspeaker is positioned in the source room and produces a controlled broadband noise signal.

The engineer then takes sound level measurements in both the source and receiving rooms.

The engineer will also measure factors such as:

  • Sound levels in the source room
  • Sound levels in the receiving room
  • Background noise
  • Reverberation time

The results are then analysed to establish the sound insulation performance of the separating construction.

Impact Sound Testing

Impact testing is generally carried out on separating floors.

A calibrated tapping machine is placed on the floor above and creates a series of controlled impacts designed to simulate everyday footfall.

The engineer measures sound levels in the room below to assess the floor’s impact sound insulation performance.

The results are compared against the relevant Part E requirements.

Common Reasons for Part E Sound Test Failures

Several reasons can cause a separating wall or floor to fail a sound insulation test. In many cases, the problem isn’t the main construction but small details overlooked during installation.

Based on our experience conducting sound insulation testing, common issues include the following.

Poor Acoustic Detailing

Small gaps and unsealed penetrations can surprisingly affect acoustic performance.

Potential problem areas include:

  • Pipe penetrations
  • Electrical sockets
  • Service risers
  • Ceiling penetrations
  • Gaps around building services

Sound can travel through surprisingly small openings, so careful detailing and sealing are essential.

Poor Installation

A wall or floor system may be designed to meet the required acoustic performance, but that doesn’t guarantee the finished construction will perform the same way.

Incorrect installation, missing insulation, poorly fitted boards or inadequate sealing can all affect the final result.

Flanking Transmission

Not all sound travels directly through the separating wall or floor.

Noise can also travel through adjoining elements of the building — known as flanking transmission. This can include connections between walls, floors, ceilings and other structural elements.

Changes During Construction

Changes made to a wall or floor construction during the build can also affect acoustic performance.

Replacing specified materials, changing service routes or altering details without considering the acoustic implications can introduce weaknesses into the construction.

Getting acoustic design advice early can help identify and avoid these problems.

How Can You Improve Your Chances of Passing on the First Try?

Good preparation can make a significant difference.

Before your sound testing engineer arrives, make sure the areas being tested are genuinely ready.

Complete the Necessary Finishes

Where applicable, make sure:

  • Plasterboard installation is complete
  • Sealant and acoustic sealing works are finished
  • Flooring has been installed
  • Doors are fitted
  • Relevant construction details are complete

Check for Gaps

Look carefully around service penetrations, sockets, pipework and other openings. Seal any gaps appropriately before testing.

Follow the Specified Construction

The finished wall or floor should match the approved acoustic specification.

If you’ve made changes during construction, check their potential acoustic impact before arranging the final test.

Get Advice Before Testing

If you’re unsure whether a construction is likely to meet the required standard, getting advice before the test can be far more cost-effective than discovering a problem after completion.

Early acoustic input can help identify potential weaknesses while you still have time to correct them.

Sound insulation testing of walls in houses by APT Sound Testing Ltd

Why Choose APT Sound Testing?

APT Sound Testing is a UKAS-accredited testing laboratory providing specialist building compliance testing across the UK.

We work with a wide range of clients, including:

  • House-builders
  • Property developers
  • Principal contractors
  • Housing providers
  • Architects
  • Building Control professionals
  • Private clients

Our clients choose APT Sound Testing for:

  • UKAS-accredited testing
  • Nationwide coverage
  • Fast turnaround times
  • Competitive fees
  • Experienced acoustic engineers
  • Building Regulations expertise
  • Comprehensive test reports

We also understand that sound testing can be a critical part of a construction programme. A failed test or a test arranged too late can delay other stages of a project, so we aim to make the process as straightforward as possible.

Plan Your Part E Sound Testing Early

Part E sound testing is an important consideration for many new-build and residential conversion projects. The earlier you consider acoustic requirements, the easier it is to spot potential problems and address them before they become expensive issues.

If your project is approaching completion and you need Part E sound insulation testing, APT Sound Testing can help.

GET A FAST PART E SOUND TESTING QUOTE

Smoke Shaft Testing
Smoke Shafts – A Glossary of Terms

Smoke Shafts – A Glossary of Terms

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A Glossary of Terms for Smoke Shaft Testing

Smoke shaft systems are critical to fire safety in high-rise buildings and a key part of a smoke control system; therefore, the shaft’s airtightness is paramount. However, different terminology can confuse the average person preparing for air testing of their smoke shaft.

To clarify some common air-testing and smoke-shaft terms, we’ve assembled this glossary of words that can be difficult to understand in the field of air-testing smoke shafts. It includes terms related to air testing, smoke shafts, and test parameters. While it’s far from exhaustive, we hope it provides some guidance.

Blower-door-equipment-for-air-testing-smoke-shafts-by-APT-Sound=Testing-Ltd

Smoke Shaft Air Testing – A glossary of terms A to Z

Here’s an A-to-Z glossary of terms related to air testing for smoke shafts:

A – Airflow Rate: The volume of air moving through the smoke shaft per unit of time, typically measured in cubic meters per hour (m³/h). Most smoke shafts need to achieve an airtightness target of 3.8 m³/h/m².

B – Building Regulations: Legal standards that govern the design, construction, and performance of buildings and smoke shafts, including fire safety measures.

C – Calibration: The process of verifying the accuracy of testing equipment against known standards. Smoke shaft air-testing equipment should be UKAS-calibrated

D – Damper: A device installed within ductwork or smoke shafts to control airflow.

E – Extraction Rate: The rate at which smoke is removed from a space by ventilation systems.

F – Fan Pressurisation Test: A diagnostic method used to determine a building’s airtightness by using a blower door fan to pressurise or depressurise the building.

G – Gauge Pressure: The pressure within a smoke shaft relative to the external atmospheric pressure, usually shown in Pascals (Pa).

H – Human toxicity: The impact of toxic substances emitted into the environment on human health, such as very leaky smoke shafts that emit smoke into the protected atmosphere.

I – Infiltration: The unintentional or accidental introduction of outside air into a smoke shaft, typically through air leakage paths such as cracks and openings within the envelope of the shaft.

J – Joint Sealing: The application of sealant at junctions, seams, or gaps to prevent air leakage in smoke shafts.

K – Kilopascal (kPa): A unit of pressure. 1 kPa equals 1,000 pascals (Pa).

L – Leakage Path: Routes through which air can enter or escape from a building or smoke shaft.

M – Mechanical Ventilation: The use of mechanical systems to control the indoor air quality by diluting and displacing indoor pollutants such as smoke or dust.

N – Negative Pressure: A condition where the air pressure inside the smoke shaft or building is lower than the air pressure outside. Some smoke shaft air tests use negative pressure to find air leakage.

O – Opening (AOV) Doors: Doors that open in each protected area, such as a stairwell landing, in the event of a fire.

P – Pressurisation Method: A technique used in air tightness testing where the building or smoke shaft is pressurised to a known level and the airflow required to maintain that pressure is measured. Readings are usually taken between 25 and 70 in 5Pa increments.

Q – Qualitative Analysis: The assessment of a building’s air tightness based on observations rather than numerical measurements, often using smoke or thermal imaging.

R – Retardant: A substance or device used to slow down or stop the spread of fire or smoke, such as fire-board and intumescent paint.

S – Smoke Shaft: A vertical duct designed to extract smoke from a building in the event of a fire.

T – Thermal Imaging: The use of infrared cameras to detect temperature differences caused by air leakage. When used with a blower door, it’s an extremely powerful tool for identifying air leakage in smoke shafts.

U – Useful Space Heating: When the smoke shaft is heated to 6-8C higher than the surrounding building temperature, combined blower door and thermal imaging can be used to identify air leakage through the smoke shaft envelope.

W – Weather Sealing Strips: Materials used to seal gaps around doors to prevent air leakage.

X – Xenon Test: A method for detecting air leaks that uses xenon gas as a tracer in a pressurised space.

Y – Yield Point: The point at which a material or system begins to deform under stress, which could affect the smoke shaft’s airtightness.

Z – Zero Tolerance to Air Leakage: Because the smoke shaft must achieve a low air leakage figure to pass the air test, extra care is needed during the design and construction of the smoke shaft.

This glossary covers fundamental terms associated with air testing for smoke shafts. For more detailed information on smoke shaft regulations, contact APT Sound Testing to chat with our smoke shaft testing experts.

Need help with air testing your smoke shaft?

If you need help with air testing your smoke shaft, we can help. Our experienced air test engineers have over 10 years of smoke shaft testing experience, so we know how to help clients pass testing and achieve smoke shaft sign-off.

Our premium smoke shaft testing service includes:

  • Smoke shaft survey visits by experienced consultants.
  • We are a UKAS and ATTMA Level 2 air testing company.
  • Smoke shaft air test certification.
  • The latest high-powered fan equipment
  • UKAS-calibrated blower door equipment.
  • Diagnostic air leakage surveys using smoke & thermal imaging.
  • Rapid 24-hour testing service

We offer leading design, consultancy, and compliance for every part of your project. IAPT aims to provide a friendly, professional, stress-free experience for all your smoke shaft air testing requirements.s

For more information on our smoke shaft air testing services for smoke shafts, please get in touch with Darrenen directly on 07775623464, or email us at info@airpressuretesting.net

Contact APT for your smoke shaft Air Test.

APT Sound Testing Ltd is one of the UK’s leading UKAS-accredited testing laboratories for smoke shaft air tightness testing. We combine air leakage testing, smoke visualisation surveys, and thermal imaging inspections to accurately diagnose leakage pathways and help clients achieve compliance first time. Our experienced engineers conduct smoke shaft testing on residential, commercial, high-rise, and mixed-use developments across the UK.

Smoke Shaft Air Tightness Testing • Smoke Shaft Leakage Detection • Thermal Imaging Surveys • UKAS Accredited Testing • Nationwide Coverage

APT Sound Testing Ltd
📞 07775623464
🌐 www.aptsoundtesting.co.uk
📧 info@aptsoundtesting.co.uk

Helping developers achieve compliant smoke ventilation systems through expert testing and leakage diagnostics.

Smoke Shaft Testing & APT
Smoke Shaft Air Testing from APT Sound Testing

Smoke Shaft Air Testing from APT Sound Testing

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Guide to Smoke Shaft Air Testing for High-Rise Developments 

APT Sound Testing’s team of ATTMA Level 2 engineers carries out smoke shaft air testing using UKAS-calibrated equipment, with all testing undertaken in accordance with the latest applicable standards and guidance, including ATTMA TSL Issue 1, CIBSE TM23:2022, BS EN 13829 and BS EN 12101-2:2017.

Read our guide to the latest smoke shaft air testing regulations and standards.

How Smoke Shaft Air Testing Works

To begin the test, our engineer installs a high-powered blower door fan into an opening within the smoke shaft, typically at mid-floor level. We then temporarily seal the top and bottom of the shaft, along with other intended openings such as extract points and ventilation grilles.

Once the shaft is prepared, the fan pressurises it so its air permeability can be measured under controlled conditions.

Finding Air Leaks in Smoke Shafts

Our air testing engineer will conduct a controlled test to establish the smoke shaft’s air-pressure permeability. Smoke shafts are generally designed to achieve an air leakage rate of less than 3.8 m³/hr/m² at 50 Pa, subject to the requirements applicable to the particular project.

If the smoke shaft or AOV installation does not meet the required air permeability, our engineers can use specialist smoke-testing equipment to help locate the source of air leakage.

We use a high-powered smoke generator while the shaft is under pressure. Escaping smoke can make otherwise difficult-to-see leakage paths much easier to identify, allowing remedial works to be targeted more effectively.

Where smoke use could be problematic, our engineers can also use high-resolution thermal imaging cameras to help identify air leakage. Combining air testing with thermal imaging provides a highly effective way to investigate failed smoke shaft tests.

Smoke Shaft Air Testing Checklist

Before smoke shaft testing can take place, construction of the shaft should be substantially complete. To ensure the test can be carried out correctly and in accordance with the relevant requirements, the following points should also be addressed:

  • No temporary seals should be present on the shaft envelope. Temporary seals are generally only permitted for dampers, fans and linking ductwork.
  • Fire-stopping and penetrations should be fully completed throughout the shaft.
  • No construction work or operatives should be present within the shaft during testing.
  • The shaft should be clear of debris, tools and construction materials.
  • A suitable 240V power supply should be available.
  • Small blow heaters should be available in the smoke shaft, where required.

Meeting these requirements before our engineer arrives can help avoid delays and ensure the test proceeds efficiently.

Accreditation and Technical Competence

APT Sound Testing is a UKAS-accredited ISO/IEC 17025 testing laboratory, specialising in on-site (field) air tightness testing for smoke shafts in commercial and large-scale buildings.

Our UKAS accreditation demonstrates that our testing, reporting and quality management processes meet recognised technical and procedural standards.

We are also an ATTMA Level 2 registered organisation, qualified to test Large, Complicated and High-Rise (LCHR) buildings, as well as phased and zonal handover projects. In addition, our ATTMA EA accreditation enables us to perform accurate, compliant envelope area calculations for complex commercial buildings.

With more than 20 years of specialist experience, our engineers have provided testing and consultancy services on some of the UK’s most prestigious and technically challenging developments, including Battersea Power Station and the Imperial War Museum London.

This combination of accredited competence, specialist technical knowledge, and extensive industry experience lets us provide reliable, repeatable, and fully compliant smoke shaft air testing across a wide range of commercial and high-rise developments.

Contact APT Sound Testing

A failed smoke shaft air test can result in costly delays and remedial work. An experienced, appropriately accredited testing laboratory can help identify potential issues early and give your project the best chance of passing its smoke shaft air test on the first attempt.

If smoke shaft testing is required for your development, contact our smoke shaft testing specialist, APT Sound Testing, on 07775 623464 – 01525 303905 or email info@aptsoundtesting.co.uk to discuss your requirements and arrange a test.

Air Tightness Testing
A Guide to Air Tightness Testing

A Guide to Air Tightness Testing

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Air Tightness Testing: What You Need to Know

A well-built property should be comfortable, energy efficient and able to keep unwanted air leakage under control. This is where air tightness testing plays an important role.

At APT Sound Testing, we provide professional air tightness testing across the UK, working on everything from individual homes and housing developments to large commercial buildings. We are one of the few UKAS-accredited companies able to carry out both air and sound testing to the relevant Building Regulations and standards.

Because our engineers are qualified to carry out multiple types of testing, we can often complete air, sound and ventilation testing during the same visit. This can save our clients money, reduce disruption and make site coordination much easier. Unlike many testing companies, we also carry out our own work rather than subcontracting it.

Air Tightness Testing

What is air tightness testing?

Air tightness testing, sometimes referred to as an air permeability test or blower door test, measures how much uncontrolled air leakage occurs through a building’s envelope.

Every building needs some ventilation, but uncontrolled air movement through gaps, cracks and joints in the building fabric can waste energy. These unwanted gaps are commonly experienced as draughts.

During an airtightness test, specialist blower door equipment pressurises or depressurises the building. The equipment measures the airflow required to maintain a set pressure difference between the inside and outside of the building. This allows the building’s air leakage rate to be calculated.

The more airtight a building is, the less conditioned air it loses unnecessarily. This can reduce energy consumption, lower carbon emissions and reduce the demand placed on heating, cooling and mechanical ventilation systems.

Why is air tightness testing important?

Air tightness testing became a legal requirement for many new buildings in England and Wales in 2006 under Part L of the Building Regulations.

Part L covers the conservation of fuel and power and includes requirements for the energy performance and air permeability of buildings. For domestic projects, Part L1A is generally applicable to new dwellings, while Part L2A relates to new non-domestic buildings.

The required air permeability target depends on the building type and design. A common target for a standard dwelling is around 5.0 m³/hr/m² at 50 Pa, although the required figure depends on the specific project. Commercial buildings can have significantly lower target air permeability rates, often around 3.0 m³/hr/m² or below.

Meeting the required target is important for achieving Building Control approval and demonstrating that the building has been constructed in accordance with its design requirements.

Where does air leakage occur?

Air leakage can occur almost anywhere there is an unintended gap or break in the building envelope.

Common problem areas include:

  • Around windows and doors
  • Service penetrations
  • Floor and wall junctions
  • Roof and ceiling junctions
  • Electrical sockets and fittings
  • Pipe and cable penetrations
  • Around ventilation systems
  • Poorly sealed joints
  • Gaps between construction materials

One challenge is that individual leaks can be difficult to see. A building may have dozens, or even hundreds, of relatively small leakage paths which collectively have a significant effect on its overall air permeability.

This is why testing during construction, rather than waiting until the very end of a project, can be so valuable.

Air leakage, condensation and moisture

Uncontrolled air movement can cause more than just wasted energy.

In winter, warm, moist indoor air can pass through gaps in the building fabric and reach colder areas within walls, floors, or roofs. Depending on the construction and conditions, this can contribute to condensation and potentially lead to mould, damp or deterioration of building materials.

During warmer or more humid periods, unwanted infiltration can also introduce humid outdoor air into a building.

A properly designed and constructed air barrier helps control where air enters and leaves the building. This makes it easier to manage energy use, indoor comfort and moisture movement.

How much heat can be lost through air leakage?

The amount of heat lost through air leakage varies considerably depending on the building, its construction and the extent of the leakage.

Poor airtightness can significantly contribute to heat loss and increase the energy required to maintain comfortable indoor temperatures. In some poorly performing buildings, uncontrolled air leakage can account for a substantial proportion of overall heat loss.

An air tightness test provides measurable information about building performance rather than relying on assumptions.

What does an air tightness test tell you?

A blower door test does more than provide a pass-or-fail result.

The test measures the amount of air moving through the building at a known pressure difference. This information helps you understand how well the building envelope is performing and, when needed, investigate individual leakage paths.

Finding air leakage paths

One of the biggest advantages of testing is that it can help identify areas where air is escaping or entering the building.

At APT Sound Testing, our engineers can use techniques such as smoke testing alongside blower door testing to help locate leakage paths.

Sometimes one or two relatively large gaps cause the problem. More often, however, a building’s overall air leakage results from numerous smaller defects spread throughout the building.

Finding these issues before completion allows contractors to seal them and improve the building’s performance before the final test.

Improving energy efficiency

Every time conditioned air escapes a building, replacement air must be heated or cooled. The greater the uncontrolled air leakage, the greater the potential energy requirement.

Air tightness information can therefore be useful when considering energy consumption, heating and cooling requirements and the overall performance of the building.

Improving occupant comfort

Draughts can noticeably affect the comfort of people using a building.

Cold air entering through unintended gaps can create uncomfortable conditions, particularly in homes, offices and other occupied spaces.

We have previously investigated buildings where occupants were experiencing significant comfort problems. In one case, testing identified an air leakage rate of approximately 25 m³/hr/m². Once the leakage paths were identified and sealed, the building achieved an air permeability below 5 m³/hr/m², significantly improving its performance.

Reducing the risk of moisture problems

Uncontrolled air movement can carry moisture through parts of the building fabric. Depending on the construction, this can contribute to condensation and other moisture-related problems.

Good air barrier design and careful construction can reduce these risks by controlling where air can move through the building envelope.

Controlling outdoor pollutants

Air leakage can also allow outdoor pollutants to enter a building through uncontrolled routes.

For properties close to busy roads, garages, commercial premises, restaurants or other potential pollution sources, this can be an important consideration. A well-designed and properly constructed air barrier helps provide greater control over where outdoor air enters the building.

When should you carry out an air tightness test?

Although the final air tightness test is normally carried out before completion, we recommend considering air permeability from the earliest stages of a project.

Consider the design of the building’s air leakage line alongside the construction details. Everyone involved in the project should understand where the air barrier is located and how it will be maintained around junctions, openings, and service penetrations.

Early testing can also be extremely useful.

If an initial test identifies problems while the construction team is still on site, leakage paths can usually be repaired more easily than after the building is complete.

Air tightness consultancy and design reviews

At APT Sound Testing, our involvement doesn’t have to start on the day of the final test.

We provide air tightness consultancy and design reviews to help clients identify potential problems before they become expensive to fix. We can work with project teams throughout the design and construction process, providing practical advice on reducing unwanted air leakage and achieving the required target.

Our experience across a wide range of residential and commercial developments means we understand the practical challenges that can affect air permeability results.

We also provide guidance to help contractors prepare for testing, including our air tightness checklist.

Combine air and sound testing to save time and money

One advantage of working with APT Sound Testing is that our engineers are UKAS accredited to carry out both air and sound testing.

This means we can often combine testing into a single planned visit.

For many projects, our clients use our three-step pre-completion testing package, reducing the need to coordinate several different testing companies.

Combining tests can provide:

  • Reduced testing costs
  • Fewer site visits
  • Less disruption to the construction programme
  • Easier site coordination
  • A single point of contact for multiple testing requirements

Where required, we can also arrange out-of-hours testing, including Saturdays and Sundays. This can be particularly useful on busy commercial developments where testing during normal working hours could disrupt other trades or occupants.

Why choose APT Sound Testing?

We have extensive experience carrying out airtightness testing on developments throughout London and across the UK.

Our team understands building regulations requirements and the practical challenges of achieving an airtight building. Rather than arriving only to carry out a final test, we can work with your project team throughout the design and construction stages to help identify potential issues before they become problems.

Whether you need a final compliance test, early-stage testing, leakage investigation or advice on your air barrier design, our experienced engineers can help.

If you are planning a new residential or commercial development and need advice on airtightness testing, get in touch with the APT Sound Testing team. We can discuss your project, explain what testing is required and help you plan for a successful result.

Need help preparing for your air tightness test? Contact our team by calling 01525 303905 or by using our online contact form.

Environmental Conditions for Thermal Imaging
Environmental Conditions for Thermal Imaging

Environmental Conditions for Thermal Imaging

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Good Environmental Conditions for Thermal Imaging Surveys

At APT Sound Testing, we have completed thousands of Level 3 Thermographic Surveys across London, the Home Counties and the South of England. Our thermal imaging surveys help clients identify heat loss, air leakage, moisture intrusion, insulation defects and other building performance issues.

Although modern thermal imaging cameras are highly sophisticated, accurate, meaningful results depend on more than using high-quality equipment. Environmental conditions at the time of the survey can have a significant impact on the quality and interpretation of thermal images.

Even an experienced thermographer requires suitable temperature differentials, stable weather conditions and appropriate survey timing to identify thermal anomalies accurately. Understanding the environmental factors that influence thermal imaging is therefore essential to produce reliable, actionable results and avoid misleading readings.

Optimum Weather Conditions for Thermal Imaging Inspections

To achieve the most accurate results from a thermal imaging survey, consider several environmental factors.

Weather Conditions

Where possible, thermal imaging surveys should be carried out during stable weather conditions. Rain, fog, and high humidity can affect image quality and make it harder to interpret thermal patterns accurately.

For this reason, we aim to avoid surveying during periods of adverse weather wherever possible.

Sunlight Exposure

Direct sunlight can significantly influence the temperature of building surfaces and potentially mask or distort thermal anomalies. For external thermal imaging inspections, surveys are therefore best undertaken when solar influence is minimal.

Early morning or late evening are generally the best times, depending on the season and the survey’s specific requirements.

In winter, this typically means surveying from around 6:00–7:00 am, while in summer an earlier start of around 4:00–5:00 am may be necessary to minimise solar loading.

Temperature Differential

A suitable temperature difference between the internal and external environments is one of the most important factors in a successful thermal imaging survey.

As a general guide, a minimum temperature difference of approximately 10°C between the inside and outside of a building provides a useful differential for identifying heat loss through the building envelope.

The greater the appropriate temperature differential, the easier it can be to identify variations in thermal performance.

Wind Speed

Wind can affect the temperature of external surfaces and cause heat to disperse from the building envelope. In most circumstances, it is preferable to conduct surveys when wind speeds are below approximately 10 mph.

Higher wind speeds can make thermal patterns more difficult to interpret and may reduce the reliability of certain observations.

Surface Properties and Emissivity

Different building materials emit infrared radiation differently. This property, known as emissivity, must be considered when carrying out and interpreting a thermal imaging survey.

For example, wall cladding, glass, painted surfaces and masonry can all have different thermal and reflective characteristics. An experienced thermographer will consider these differences and adjust camera settings and measurement techniques accordingly.

Seasonal Timing

Winter is generally the preferred season for many building thermography surveys, particularly when the objective is to identify heat loss, insulation defects and thermal bridging.

The larger temperature difference between a building’s interior and exterior in colder weather can provide greater thermal contrast, making anomalies easier to detect.

Improve Speed and Efficiency with Infrared Surveys

Traditional inspection techniques can be effective, but they can also be time-consuming, particularly when defects are concealed behind surfaces or located in difficult-to-access areas such as roofs, high-level walls and building façades.

Thermal imaging provides a fast, non-invasive way to survey large areas. A thermographer can quickly scan large sections of a building and identify potential areas of concern without physically accessing every surface.

This provides near-immediate visual feedback and helps focus further investigation where it is most needed. The speed of thermal imaging can be particularly valuable when assessing buildings where time is critical, such as during emergency investigations or when diagnosing unexpected building performance problems.

Improve Health and Safety with Thermographic Inspections

Traditional inspection methods can sometimes require scaffolding, access platforms or large motorised access equipment to reach high-level areas.

Thermal imaging can reduce the need for this type of access in many situations, allowing thermographers to assess large areas from a safe position on the ground or from another accessible location.

Reducing the requirement for work at height can help minimise associated risks and improve the overall efficiency of an investigation. As we explain in our article on how thermal imaging surveys can improve health and safety, infrared inspections can be a valuable tool for identifying problems while reducing the need for potentially hazardous access arrangements.

The Importance of Experience and Equipment

While environmental conditions are extremely important, the thermographer’s experience and expertise also play a major role in delivering meaningful results.

Highly experienced personnel, appropriate survey techniques, and high-sensitivity thermal imaging equipment can reduce some environmental limitations.

At APT Sound Testing, our thermographers are Level 3 trained, providing the expertise required to undertake detailed thermographic investigations.

We use high-resolution FLIR 480 × 640 thermal imaging cameras, combined with our latest in-house trend analysis software. This lets us efficiently analyse thermal data and produce clear, detailed reports after each infrared survey.

Experienced Level 3 thermographers, high-resolution equipment, and appropriate environmental conditions enable us to provide reliable thermal imaging data that helps clients make informed decisions about their buildings.

Arrange a Thermal Imaging Survey

If you require an infrared thermal imaging survey in London, the Home Counties or the South of England, APT Sound Testing can help.

For more information about our thermal imaging survey service, please contact us on 07775 623464 or email info@aptsoundtesting.co.uk.