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Noise and Acoustic Consultancy
APT Noise and Acoustic Consultancy

APT Noise and Acoustic Consultancy

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Professional Noise and Acoustic Consultancy

APT Sound Testing is a professional noise and acoustic consultancy firm operating in Greater London and the Home Counties. Our fully qualified and highly experienced consultants can provide expert advice and conduct survey analysis into all aspects of sound, such as investigating complaints into excessive noise and/or a BS 4142 London Noise Surveys.

We undertake London noise surveys on numerous potential housing and other noise-sensitive sites throughout the Capital and the UK. Our acoustic surveys cater for sites that may be exposed to noise from road, rail or air traffic and/or from industrial activity.

We undertake wide range of services from noise assessments through to noise mitigation proposals. Where it is proposed to install new plant or equipment, we undertake noise surveys to determine noise emission limits, in line with Local Authority requirements, and provide advice on mitigation.

As a local company we have an in depth knowledge on Greater London planning permissions and local legislation. Our noise consultants are expertly suited to carry out noise assessments, with a wealth of experience in assessing the sound impact of residential, industrial and commercial businesses in the community.

Noise Surveys for New Developments in London
London noise surveys and report should be submitted during the pre-application process and discussions on planning applications. In many circumstances a planning condition will stipulate that a noise survey will need to be undertaken.

Noise surveys are normally carried out at the design stage of the project prior to the commencement of construction., this is to allow the acoustic design of the building to take into account the local noise levels, i.e. if the local noise levels are quite high then the acoustic design will ned to be more robust to mitigate any potential noise problems. Thereafter the local authority may also require post a BS 8182 London noise survey to prove that the noise standards have been achieved within the living rooms and bedrooms. The following information will usually need to be included within the noise survey report.

  1. The reason and scope of the report.
  2. Location plan of the proposed development and likely receptor points such as the nearest residential window/s.
  3. The noise survey Methodology including the noise monitoring location, the equipment used and the weather conditions during the noise survey.
  4. Reasons for deviations from standard methods.
  5. Full table of results.
  6. A comparison of survey results against the noise standards.
  7. Recommendations for noise control measures – acoustic barriers etc.
  8. Full calculations against noise reductions expected to support any suggested noise control measures.

The Different NEC Noise Exposure Categories (NECs)
There are four Noise Exposure Categories based on the level of noise at the development. The NEC in which the site falls determines to what extent noise should be considered in the granting of planning permission. The NEC(s) are usually determined by monitoring noise levels. Potential mitigation options can then be assessed by calculation, and/or the use of noise modelling. Appropriate noise mitigation can then be incorporated into the development at the design stage.

Problems relating to noise during the planning stages can usually be avoided or resolved with a good, detailed and accurate acoustic assessment report and by accounting for robust mitigation measures where and when required.

APT Sound Testing can be consulted on all aspects of acoustic related issues. In addition to sound measurements we also provide invaluable advice on the soundproofing design of walls and floors to meet the standards of Part E of Building Regulations. As a true specialist, we can offer a complete solution. Here are a few of our services:

  • 8233 Noise Surveys to help you achieve planning for your development.
  • Acoustic Design Service to ensure you project complies with Building Regulations Part E.
  • Sample sound testing to check the acoustic performance of your existing construction to allow for targeted acoustic upgrades.
  • Visual site surveys to insure your subcontractors are constructing the acoustic details correctly
  • Pre-completion London Sound Testing in compliance with Building Regulations Part E.

Pre-Completion Sound Testing In London
Pre-Completion Sound Testing is method of showing compliance with Approved Document Part E of the Building Regulations by testing the completed construction prior to handover. Sound Testing Services in the UK required for Pre-Completion Testing (PCT) with respect to Building Regulations Approved Document Part E is carried out when the construction of party walls and floors are complete.

Site Visits & Sample Sound Testing

APT Sound Testing offer Acoustic Site Survey visits to let us view the existing site construction. This allows us to check for potential problematic areas such as lightweight blocks haven’t been used in the existing construction. It also lets us check that the installation teams are installing the acoustic materials as per manufacturer’s guidelines, thus avoiding crucial onsite mistakes. We can also undertake sample sound testing of existing site construction; this offers an accurate overview of the acoustic performance of the existing partitions which enables us to offer a targeted acoustic design which correlates with the sound performance of the existing construction.

BS8233 Noise Surveys in London
London noise assessments are often required at the planning stage of developments that may generate noise, and noise-sensitive developments which may be affected by noise. Some developments, such as mixed use, fall into both categories. Potentially noise generating developments often require a Noise Impact Assessment to be undertaken. This normally requires existing ambient noise levels to be established, typically by undertaking measurements, and the impact of noise from the development to be established. For large developments, it is often necessary to consider secondary effects, such as the impact of increased traffic on existing roads.

Internal noise levels within the proposed buildings can be calculated using our latest noise prediction software. For most buildings, the overall sound insulation performance of the building envelope will depend on the glazing system employed. It may be necessary to stipulate specific glazing and ventilation systems that must be employed to ensure that internal noise criteria are achieved.

If you are an individual or a business with sound problems, and would like to speak with one of our professional noise consultants, please speak to one of our advisors today. The noise assessment process isn’t intrusive, lengthy or costly. Normally we would leave a meter over a 24 hour period which would gather the necessary data automatically, taking into account other factors such as construction, setting and external variables. We could then provide a detailed report and advise how best to proceed.

Contact APT Sound Testing
APT Sound Testing is one of the leading acoustic consultancy firms operating in the Greater London area. For London noise surveys, assessments, studies as well as our full range of London sound insulation testing, please contact our knowledgeable team of noise experts to provide professional and invaluable advice which could save you time and potential costs further down the line – call today on 01525 303905 or email info@aptsoundtesting.co.uk 

Sound Testing Services
Sound Testing Services in London

Sound Testing Services in London

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Sound Testing Services on London Developments
London is a huge city containing over 8 million people. In this crowded environment it is essential that noise transference between properties in kept to a minimum between new and existing buildings for the occupant’s wellbeing.

To help control noise issues APT Sound Testing undertakes UKAS accredited Part E sound throughout London and the South East. When there are problems with noise transference between dwellings, and the building’s design is called into question we can offer advice on how to upgrade the wall and/or wall partition.

We has extensive knowledge regarding the way different materials and construction methods can influence the results of a sound test, this helps to ensure to ensure your company achieves compliance with the Sound Testing for Part E of Building Regulations.

Sound Testing Services in London
Pre completion sound testing in London has been a mandatory requirement since July 2003. All new build properties and conversions which were built after this date require 10% of each party wall/floor construction type to be tested. Sound insulation testing is to be carried out between pairs of rooms separated by party walls and/or floors. In is usual to test between living rooms and bedrooms, which are classed as the two main habitable rooms; however, other rooms can be used if this is not possible.

We are also experiencing a rise in the amount of sound testing that’s required to existing London buildings. We have carried out a large amount of sound tests in council/housing association blocks, where the residents are experiencing excess noise between the dividing wall and floor partitions. We also undertake sound testing to existing flats where the lease stipulates that wooden floors should not be used instead of carpets and as a result the noise levels have increased through the floors. In all these instances we can undertake sound testing to highlight the existing noise levels so acoustic upgrades – if required) can be targeted and implemented.

Our test procedure involves setting up a noise source in a room on one side of the party wall or floor and measuring the noise on both sides of the partition. Airborne sound testing may also be required between horizontally and vertically separated pairs of rooms.

The sound insulation testing is undertaken by using a sound source, amplifier and loudspeaker to generate a high noise level in one room (the source room). Noise measurements are then taken in both the source and receiver rooms using a prescribed number of source and microphone positions. The background levels in the receiver room are measured and the reverberation time in the receiver room is also measured. From the results, the airborne sound insulation (DnT,w + Ctr) is calculated and compared to the requirements of Approved Document E of Building Regulations.

For vertically separated rooms, Impact sound testing may also be required. This sound test is undertaken using a tapping machine which drops a series of weights onto the floor of the upper room. The noise level in the lower (receiver) room is measured for a prescribed number of source and microphone locations. The background levels in the receiver room are measured and the reverberation time in the receiver room is also measured. From the results, the impact sound insulation results (LnT,w) is calculated and compared to the requirements of Approved Document E of Building Regulations.

APT Sound Testing Services
Our sound test engineers carry all the latest Norsonic equipment, which are class one rating and all of our sound insulation testing, is completed to a strict quality controlled standard. We provide full UKAS Accredited sound insulation testing and air testing.

If you would like advice on your acoustic design or sound testing in London, please contact APT Sound Testing now on 01525 303905 or visit our Acoustic & Sound Testing Services website.

Planning Noise Assessment
Steps for a Planning Noise Assessment

Steps for a Planning Noise Assessment

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The 5 Steps for a Planning Noise Assessment

Impact assessment

Prior to the noise survey the acoustic consultant will need to know the noise parameters set by the local environmental protection team for the required noise impact assessment.

1st Step – Baseline situation

It will usually be necessary to have a full understanding of the existing noise levels in the vicinity of the receptor. This can be achieved by carrying out a planning noise survey of background or ambient noise levels over the period when the noise source will be operational.

The baseline noise levels will usually be determined by measuring the LA90 or the LAeq, however in practice both will usually be measured simultaneously.

The term ‘LA90’ is the ‘A’ weighted noise level exceeded for 90% of the measurement period. Typically this is called the background noise level if it relates to a period when the noise source is not operational.

The ‘A’ weighting is a correction applied within a sound level meter to adjust the response of the Class A noise meter to match the response of human hearing at different frequencies. This is used to exclude short-term noises, such as a vehicle passing from the measurement value, leaving only the underlying or background noise.

The terms ‘LAeq’ is as an average noise level over the measurement period, although it relates to the average noise energy. It is a popular and universally used measure which correlates well with human annoyance.

Step 2 – Noise sources and times of operation

A detailed knowledge of the noise source (or in the case of a proposed development, the likely noise source) is also essential. This is because noise levels are of less importance than the amount by which they exceed the baseline noise and the times or days of operation.

Step 3 – Manufacturer Data for Proposed Equipment

If the proposed development will create a source of noise, the noise consultant may need the manufacturer’s data for proposed equipment, times of operation and working practices.

Step 4 – Determining the impact

Noise impact is determined using a variety of methods, all of which will rely on comparing noise levels at a receptor against absolute noise level criteria or against existing baseline noise levels. Generally one of three approaches is used:

  1. Where the proposal is for a development which will introduce an industrial type noise source, or where a receptor in a new development may be affected by this type of source, it is usual to assess impact by comparing the noise level, after making corrections for certain attributes of the noise, against background noise levels at the receptor (existing or proposed). The council expects that, at the receptor, noise from the source is a certain amount below existing background levels. Typical cases include new equipment in a business, an air conditioning unit or an extract and fan serving a restaurant. This is known as the BS4142 methodology.
  2. In some cases the impact does not depend on a comparison between source levels and baseline levels. For example, a proposed housing development is close to an existing road, where generally the impact is determined by establishing whether the absolute levels due to the source are acceptable.
  3. Applications for certain developments may require a more specialist approach. For example, the method for assessing a new nightclub combines both elements. Existing levels of noise in low frequency bands are measured and compared against levels in those same frequencies with music playing. The council may then require that the music does not cause any increase above existing levels.

Step 5 – Noise mitigation measures

Development proposals which are inherently noisy may include mitigation measures in the original scheme. However, the need for further mitigation may be necessary when the impact assessment indicates that the acceptability criteria are exceeded. Either way noise mitigation, or reduction measures, should be considered in the assessment in demonstrating how the acceptability criteria will be achieved.

The most effective measures will be those which reduce levels at source, rather than in transmission or at the receptor. However, in situations such as where the proposal is for new housing near existing sources of noise, it will not be possible to reduce source noise levels. Where the proposal will introduce a new noise source it is good practice to reduce levels at source as far as possible, before considering other mitigation measures, some of these may be:

  1. Reduction of noise at source – Using equipment or systems with lower sound power levels is highly effective and can avoid the need for other more costly and intrusive mitigation options. Noise impact can be lessened by reducing total running times or by shifting operations to less sensitive times of the day. The use of acoustic silencers and enclosures around the source may also be effective at reducing the need for other mitigation methods.
  • Reduction of noise in transmission – The simplest way to reduce noise once emitted is by increasing the distance to receptors. For example, siting of plant and equipment within an industrial site as far away from sensitive receptors as possible and/or the new housing development may be designed so that properties are set back from a noise source. In many cases, a properly calculated buffer zone between source and receptor will represent the most cost effective solution.
  • Reduction of noise at a receptor –  if the development is located in a busy urban area, this may be the only option to reduce the noise impact, also where the applicant has no access to land for the construction of a barrier. The way a development is designed can be an effective mitigation tool if the building faces away from the main noise source. Also, if noise sensitive rooms are located on the sheltered side of the building, the impact will be reduced at the most sensitive areas.
  • Acoustic Improvements to the building façade – Where no other options are available, improving the sound insulation of a building facade can be effective in reducing internal noise levels. However, often it will be necessary to provide acoustic treated mechanical ventilation to avoid the need to open windows in warm or humid weather, this is often the solution next to busy elevated railway lines.

Here at APT Sound Testing, we can offer a detailed survey report and outline possible mitigation measures with noise mapping to show the ‘real life’ effectiveness of the measures. Such assessments can cover extraction systems, air conditioners, industrial plant, refrigeration units, and general use of industrial buildings.

If you would like more information in regards to our planning noise surveys for planning and acoustic design for your development, please visit the APT Sound Testing website or call us today on 01525 303905.

Thermal Imaging Surveys
Thermal Imaging & Commercial Buildings

Thermal Imaging & Commercial Buildings

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Thermal Imaging Surveys for Commercial Buildings

Thermal imaging (thermographic) surveys are one of the most effective diagnostic tools for identifying heat loss in commercial buildings across London and the South East. Using advanced infrared technology, these surveys clearly highlight where energy is escaping, often revealing issues that building owners are completely unaware of.

Many of our clients are genuinely surprised by the number and scale of heat loss sources uncovered during a thermal imaging survey. Common problems include cold draughts caused by air leakage through cracks in the building envelope, as well as missing or poorly installed insulation within walls, floors, or roof spaces, sometimes entire sections are found to have been overlooked during installation.

How Do We Carry Out a Thermal Imaging Survey?

We aim to arrange a site visit at a time that is convenient for you. Thermal imaging surveys are typically carried out between November and April, as suitable weather conditions are essential for accurate results. In some cases, surveys may need to be rescheduled if conditions are unsuitable, such as during heavy rainfall or periods of high daytime and nighttime temperatures.

On arrival, our thermal engineer will discuss any known heat loss issues, draughts, or comfort concerns you have, as well as your objectives for the survey. Unlike many competitors, we always conduct both internal and external thermal surveys as standard, ensuring a comprehensive assessment of your building’s performance.

How Long Does a Thermal Imaging Survey Take?

The duration of a survey depends on the size of the building and how involved you wish to be. We strongly encourage building owners or site representatives to accompany our engineer during the inspection. This collaborative approach allows us to explain findings in real time and ensures you gain a clearer understanding of the issues identified.

  • Small to medium buildings: 1–2 hours
  • Large commercial buildings: 3–4 hours

Allow additional time if you have specific questions or multiple areas of concern.

When Will You Receive the Thermal Imaging Report?

Your comprehensive thermal imaging report is typically delivered within 1–2 working days in PDF format. The report includes:

  • Thermal and visual images
  • Clear interpretation of findings
  • Identification of defects and potential causes

Many other providers take 1–2 weeks to deliver reports, so our fast turnaround ensures you can act quickly.

Why Choose Us for Your Thermal Imaging Survey?

Our engineers are trained to Level 3 thermographic certification, the highest level achievable in the industry. Combined with our use of large-format FLIR thermal imaging cameras, this ensures the highest possible accuracy and clarity when identifying defects.

Our Specification Includes:

  • Level 3 thermographic certification
  • Level 3 qualified thermographers
  • Large-format FLIR cameras with 45-degree lenses

This combination gives you the best possible chance of accurately diagnosing and resolving thermal performance issues.

What Types of Buildings Benefit from Thermal Imaging Surveys?

Thermal imaging surveys are suitable for a wide range of building types, including:

  • Commercial buildings
  • Office blocks
  • Schools and colleges
  • Warehouses and storage facilities
  • Military infrastructure
  • Flats, houses, and residential tower blocks
  • Housing stock (local authorities and property managers)
  • Flat roofing systems

What Building Defects Can Thermal Imaging Identify?

Thermal imaging surveys can reveal hundreds of potential defects. Some of the most common issues we identify include:

  • Poor construction detailing
  • Missing or damaged insulation
  • Thermal and cold bridging
  • Air leakage and unintended openings
  • Moisture penetration and water ingress
  • Poor thermal comfort
  • Damp and mould issues

Contact Us for More Information

If you would like to learn more about our thermal imaging services, please contact us on 01525 303905, complete our online form or email info@aptsoundtesting.co.uk.

Alternatively, visit our website for guidance on preparing for a thermal imaging survey or download our Thermal Imaging Checklist.

Improving Sound Insulation In London
Improving Sound Insulation on London Property Developments

Improving Sound Insulation on London Property Developments

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Improving Sound Insulation on London Property Developments
Many of the dwellings in London consist of flats converted from large Victorian houses.. Unfortunately at the time of the building conversion, designing for sound insulation was not a high priority and so many of the dwellings suffer from adverse noise transference between the floor and wall partitions. This can be extremely stressful to the occupant’s well being is a major cause for concern.

Sound Testing Services

There are ways to improve the airborne and impact performance by improving the wall/floor partitions ability to reduce the amount of sound transmission from one side of a construction element to the other. By isolating the different materials may not be enough its own and you may need to improve the mass of the partition as well.

Improving Existing Floor Partitions
In our experience of undertaking hundreds of sound insulation tests in London, refurbishment projects usually achieve 30-35dB for airborne sound and 70dB for Impact Sound, if the existing construction has not been acoustically upgraded. These figures do not meet the required 43dB & 64dB as stipulated in Part E of Building Regulations. As sound double every 10dB this is a massive failure and acoustic improvements must be made. Many existing construction consist of a similar construction as shown in as detail 1 below.

Acoustic Improvements to Existing Floor Partitions
To reduce airborne and impact sound transmission this usually means adding density and isolation to the floor construction. This can be as simple as adding a drop ceiling consisting of 125mm timber frame. The top of the frame must be a minimum of 25mm below the existing ceiling finish – such as lathe and plaster. Then, to the inside of the timber frame add 100mm of Acoustic Wool and two layers of sound-board tacked to the bottom of the timber frame – all boards to be lapped.

This should improve your sound test results by approx. 10-15dB depending on the existing site conditions and quality of the installation. Detail 2 shows this in more detail.

Improving Existing Wall Partitions
The standard onsite construction for existing internal walls may be a mixture of 100mm masonry with render applied to either side; or, 100mm timber partition with lathe and plaster to either side. Unfortunately neither of these existing wall constructions will have the acoustic properties to pass Part E in their existing state due to lack of mass and poor isolation values.

Improving Wall Partitions
One way to quick and simple way improve the acoustic performance of a the dividing wall partition, is to install a 70mm metsec partition in front of the existing wall – its usually best to install this in the largest room. Leave approx. 25mm gap between the back of the metsec and the wall. Then install 50mm acoustic wool to the inside of the metsec and add two layers of soundboard to the outside of the metsec frame, ensuring all boards are properly lapped and the perimeter joints are filled with acoustic mastic.

Taking the above into account is it essential that the acoustic design is addressed right from the start of the refurbishment project, so it prevents delays in handover, i.e. to prevent the dwelling failing the sound testing at building control signoff stage.– a common problem.

We can also offer acoustic design advice and UKAS sound testing on existing flats to ensure that the building handover is not delayed due to noncompliance with Part E. We can also undertake sample sound testing on projects where clients are worried about existing ‘hybrid’ construction/s to help highlight the existing noise levels so acoustic upgrades – if required) can be quickly targeted and implemented.

If you would like advice on your acoustic design or require sound insulation testing in London, please contact us now on 01525 303905 or contact us at info@aptsoundtesting.co.uk.

Sound Testing Services in London
APT Sound Testing Services in London

APT Sound Testing Services in London

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Searching for APT Sound Testing in London

At APT Sound Testing, we carry out professional sound testing on all types of residential and commercial buildings across London and throughout the UK. Our services also cover schools and buildings that include rooms for residential use. As a UKAS-accredited provider, all of our testing meets the requirements of Approved Document E of the Building Regulations.

A Friendly, Proactive Approach to Acoustic Compliance

We pride ourselves on offering a friendly, forward-thinking service that covers everything from acoustic design and consultancy to full pre-completion testing and certification. With many years of experience supporting clients in both the public and private sectors, we work with everyone—from self-builders and small developers to major national house builders. We also support specialist sectors, including healthcare and banking, particularly for cleanroom testing.

Our clients value not only our deep technical knowledge but also our approachable, proactive way of working. This commitment to service is one of the reasons we enjoy one of the highest return-client rates of any pre-completion testing consultancy in the UK.

Local Expertise with National Reach

Unlike many providers, we never subcontract our work. All testing is completed by our in-house engineers, ensuring consistency, quality, and reliability across every project.

With an office located in central London, we’re ideally positioned to respond quickly to urgent survey and testing requirements. We also have the capacity to carry out last-minute appointments and weekend testing, a service used frequently by clients in fast-paced sectors such as banking.

Qualified Engineers, UKAS Accreditation, and Modern Equipment

Our highly trained engineers deliver an efficient, customer-focused service from the initial design phase through to project completion. Thanks to decades of accumulated acoustic design experience, we understand the unique needs of each project and can tailor our advice accordingly.

As a multi-UKAS accredited laboratory operating to strict ISO standards, we guarantee a high level of quality and professionalism. We invest heavily in state-of-the-art acoustic testing and survey equipment, all calibrated to UKAS standards, enabling us to deliver accurate and dependable results.

Integrated Acoustic and Air Tightness Services

To make compliance as smooth as possible, we also offer in-house UKAS-accredited air tightness testing, allowing clients to combine both services in a single, seamless package—reducing costs and avoiding coordination headaches.

Get in Touch

If you need advice or want to book a sound test, we’re here to help. Contact us through our online form or call 01525 303905 to discuss your project with one of our friendly and knowledgeable acoustic or air-tightness consultants.

Sound Testing Roadmap
Sound Testing Roadmap for Leaseholders

Sound Testing Roadmap for Leaseholders

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Sound Testing Roadmap for Leaseholders

This guide is designed specifically for leaseholders who are upgrading their floor finishes from carpet to wood. It explains why sound testing is required, what the tests measure, and how to ensure compliance with lease conditions and Building Regulations.

🔎 Why Leaseholders Require Sound Testing to Floors

Many residential leases include covenants that:

  • Require carpets to remain in place, or
  • Demand proof that any new hard floor finish (such as wood or laminate) achieves equivalent sound insulation performance to the original construction.

Why?

  • Carpets naturally reduce impact noise (footsteps, moving furniture).
  • They also help limit airborne noise.
  • Replacing carpet with wood often increases both impact and perceived noise in the flat below unless acoustic upgrades are installed.

Freeholders and management companies typically request acoustic evidence to prevent disputes and ensure compliance with lease terms or Building Regulations Part E.

📊 Pre‑Works and Post‑Works Sound Testing

  • Pre‑works sound testing: Baseline measurements are taken with the existing carpet finish to record current airborne and impact insulation performance. These results set the target values for the new floor system.
  • Acoustic upgrades: Specialist acoustic companies can recommend tailored upgrades (e.g., underlays, insulation, resilient ceiling systems) to maximise the chance of passing post‑works testing.
  • Post‑works sound testing: Conducted after installation and upgrades, using the same methods to provide a direct comparison with baseline results.
  • Test standards and measurements: Reports follow recognised methods for airborne and impact sound reduction. Results are compared against lease requirements, Building Regulations Part E, or the pre‑works baseline.

👉 Tip: Always confirm test protocol, locations, and pass criteria with your management company before starting work. This ensures results are accepted without dispute.

📐 How to Compare and Complete Sound Test Results

  1. Match test conditions: Post‑works sound tests must replicate pre‑works setup (same receiver positions, furniture state, doors/windows closed).
  2. Compare metrics:
    • Airborne noise: Higher sound reduction (dB) = better. Post‑works values should equal or exceed baseline.
    • Impact noise: Lower sound pressure level (Lp) = better. Post‑works values should be equal to or lower than baseline.
  3. Produce a compliance report: Include:
    • Accredited test certificates
    • A clear table comparing pre‑ and post‑works values
    • Photographic evidence of acoustic measures
    • A signed statement confirming the tested configuration represents the finished floor system
  4. If results fail: Document remedial measures and re‑test. Common fixes include adding or improving acoustic layers above/below joists.

Accurate records and clear reporting help secure freeholder sign‑off or a formal Licence to Alter.

✅ Summary

Converting from carpet to wood in a leasehold flat almost always requires both pre‑works and post‑works sound testing. The best chance of compliance comes from:

  • Baseline testing
  • Targeted acoustic upgrades (underlays, cavity insulation, resilient ceilings, specialist panels)
  • Post‑works verification

This combined approach ensures no loss of acoustic performance compared with the original carpet finish.

📞 Contact Us Today

Our expertise, comprehensive services, and commitment to quality make us the trusted choice for sound insulation testing. We use the latest UKAS calibrated sound test equipment so you can be sure you are in safe hands.

  • 📧 Email: info@aptsoundtesting.co.uk
  • 📱 Call Darren direct: 07775 623464

Contact us today to schedule a sound test or learn more about our acoustic design services.

New Wood Floors
Sound Testing for New Wood Floors

Sound Testing for New Wood Floors

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Leaseholder Sound Testing for New Wood Floors: What You Need to Know

Upgrading a leasehold flat by replacing carpet with a hard flooring finish, such as engineered wood or solid timber, is a popular renovation choice. However, this simple change can trigger strict lease conditions requiring Leaseholder Sound Testing for Floors and, in many cases, acoustic upgrades.

Before you lift a single carpet tile, it’s important to understand why sound testing matters, what’s involved, and how to ensure your new flooring doesn’t fall foul of your lease.

This guide is written for leaseholders, managing agents, freeholders, and contractors who need to comply with sound testing regulations when switching to hard floors.

Why Sound Testing Is Required When Changing Carpet to Wood

Most leases include a covenant that either:

✔ Requires soft flooring (carpet) to remain in place
or
✔ Permits hard flooring only if sound insulation performance is proven to match the original construction

Carpet naturally absorbs footfall noise and helps limit sound transferring to the flat below. Hard finishes amplify:

  • Impact noise — footsteps, chair movement, dropped items
  • Airborne noise — voices, TV noise, music

Without proper acoustic upgrades, neighbours below may experience increased disturbance — leading to complaints, disputes, and even legal action.

That’s why freeholders and management companies often demand acoustic evidence and test certificates before approving alterations or issuing a Licence to Alter.

What Sound Testing Involves

Professional Leaseholder Sound Testing typically includes three stages:

1️⃣ Pre-Works Sound Testing (Baseline)

Carried out before removing carpets to record current acoustic performance:

  • Airborne sound insulation
  • Impact sound performance

These results become the target your new floor must meet or exceed.

2️⃣ Acoustic Upgrade Design

Based on the baseline results, an acoustic specialist may recommend:

  • Acoustic underlays
  • Floating floor systems
  • Additional mass or separation above joists

These upgrades improve your chances of passing the final test.

3️⃣ Post-Works Sound Testing

Once the new floor and acoustic layers are installed, the same tests are repeated to confirm compliance.

To avoid disputes, always agree the test method, pass criteria, and reporting format with the freeholder beforehand.

How Sound Test Results Are Compared

To ensure a fair comparison:

  • Test conditions must match (same room layouts, similar positioning)
  • Airborne sound insulation should be equal or better than the baseline
  • Impact noise levels should be equal or lower

If results fail, remedial upgrades will be required — followed by a re-test.

Clear, UKAS-approved reporting helps:

✔ Prove compliance
✔ Secure freeholder approval
✔ Prevent future noise-related conflicts

Acoustic Improvements for Hard Flooring

Effective solutions above joists may include:

  • High-performance acoustic underlay
  • Floating floor systems
  • Additional resilient layers to reduce structure-borne noise

With the right design, a wooden floor can meet — or even improve — on carpet performance.

Need Leaseholder Sound Testing? We Can Help.

We provide a complete acoustic testing and consultancy service for leaseholders across London and the South East:

Our service includes:

  • UKAS-accredited sound testing
  • Class 1 Norsonic calibrated equipment
  • Fully compliant reports accepted by Building Control and freeholders
  • Expert acoustic advice and upgrade recommendations if improvements are needed

📩 Email: info@aptsoundtesting.co.uk
📞 Call APT Sound Testing: 01525 303905

Whether you’re a leaseholder applying for a Licence to Alter or a managing agent enforcing compliance, we ensure your flooring upgrade is carried out smoothly — and soundly.

A Thermographic Survey

A Thermographic Survey

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A Thermographic Survey ~ Transform Your Property

Every home or building leaks energy, it’s just a matter of how much. In the UK, where energy prices continue to rise and the push toward net zero targets intensifies, understanding where your property is losing heat is more critical than ever. That’s where a thermographic survey, also known as a thermal imaging survey, comes in.

This advanced, non-invasive technique can uncover the hidden issues costing you money and comfort every single year, without tearing open walls or ceilings. Whether you’re a homeowner, landlord, developer, or business owner, a professional thermographic survey could be the key to unlocking your building’s full energy-saving potential.

What Is a Thermographic Survey?

A thermographic survey uses infrared cameras to detect and visualise heat patterns within a building. The resulting images, known as thermograms, make invisible problems instantly visible: areas where heat escapes, insulation is missing or poorly installed, air is leaking, or damp spots are forming.

This technology works by measuring temperature variations on surfaces and translating them into colour-coded images. Hot areas show up in warmer colours (like red or yellow), while colder areas appear in shades of blue or purple. The beauty of this method? It allows for fast, accurate assessment with no damage or disruption to your property.

Why Thermographic Surveys Matter in the UK

The UK housing stock is among the least energy-efficient in Europe. It’s estimated that around 26% of the country’s total energy consumption comes from domestic buildings, with 80% of that going directly into heating and hot water.

Despite this massive energy use, many homes continue to suffer from:

  • Poor insulation
  • Draughty windows and doors
  • Leaky roofs and walls
  • Unnoticed construction flaws

Even new-builds or recently renovated properties can fall short due to hidden gaps in workmanship or insulation installation. A thermal imaging survey is one of the fastest, most accurate ways to pinpoint these issues and create a roadmap for improvement.

Top Benefits of a Professional Thermographic Survey

Investing in a thermographic survey is about more than just diagnostics—it’s about actionable improvements that pay off. Here’s what you stand to gain:

1. Lower Energy Bills

By identifying and fixing draughts, thermal bridges, or insulation gaps, you reduce the amount of heat your building loses—cutting heating costs significantly.

2. Increased Comfort

No one likes cold spots, chilly corners, or rooms that never quite feel warm enough. Thermal imaging helps you eliminate these uneven temperature zones for a cosier, more comfortable indoor environment.

3. Early Damp and Mould Detection

Cold areas are prone to condensation, which can lead to mould and long-term structural issues. Thermographic surveys catch these problems before they become visible, protecting your health and your home.

4. Insulation Validation

Whether you’ve just installed new insulation or want to check the effectiveness of older material, a thermal imaging survey verifies whether it’s doing its job—saving you from wasted investments.

5. Sustainability and Compliance

From BREEAM standards to future government mandates on energy efficiency, thermal imaging helps you stay compliant and demonstrate climate responsibility. It also adds value when selling or renting your property.

What to Expect During a Thermographic Survey

If you’ve never booked one before, here’s how the process typically works:

✅ Tailored Consultation

We begin with a brief discussion about your property type, energy concerns, and goals. This helps us customise the survey to your specific needs.

✅ Best Timing

Thermal surveys are most effective in colder months or during times with a strong indoor-outdoor temperature difference—early morning or evening is ideal.

✅ Comprehensive Assessment

Our certified thermographers will scan both interior and exterior surfaces, using high-resolution infrared cameras to identify problem areas across walls, roofs, doors, windows, and floors.

✅ Professional Reporting

Within a few days, you’ll receive a detailed, illustrated report showing exactly where your property is losing energy—complete with explanations and recommendations for improvement.

✅ Expert Advice

Our team will walk you through the findings and help prioritise the most cost-effective and impactful upgrades.

Who Should Consider a Thermal Imaging Survey?

A thermographic survey is suitable for a wide range of properties and owners, including:

  • Homeowners looking to reduce bills and enjoy a warmer home
  • Landlords and property managers aiming to boost EPC ratings and tenant comfort
  • Buyers wanting peace of mind before a purchase
  • Architects and builders needing verification for new construction
  • Businesses, schools, and organisations working toward net zero goals

Whether you’re retrofitting an older home, quality-checking a new build, or developing an energy strategy for a commercial building, thermal imaging gives you the clear data needed to act.

Why Choose Us?

Not all thermographic surveys are created equal. With us, you’re getting industry-leading expertise backed by decades of hands-on experience. Here’s what sets our service apart:

  • Certified Thermographers: Our team is fully trained and certified to deliver accurate results.
  • High-Tech Equipment: We use top-of-the-line infrared cameras and support tools like blower door and smoke testing for enhanced diagnostics.
  • Fast Turnaround: Most surveys take 1–2 hours and reports are delivered within 5–10 working days.
  • Competitive Pricing: Transparent quotes with no hidden fees.
  • Regulatory Support: Assistance with BREEAM, EPC improvements, and building compliance.

FAQs

How long does the survey take?
Surveys usually last between 1 to 2 hours, depending on the size and complexity of the building.

Do I need to prepare my home?
Yes, but it’s simple. We’ll give you clear guidance, such as heating your home a few hours in advance and keeping doors and windows shut during the survey.

How soon will I get the report?
Your illustrated thermographic report is typically delivered within 5–10 working days.

Take the First Step Toward a Warmer, Greener Property

Don’t wait for another winter of high bills and cold rooms. A thermographic survey offers a fast, affordable way to make your property more efficient, comfortable, and future-ready.

Contact our expert team today to get a free consultation or instant quote. Most surveys are completed in under two hours—and the energy savings could last a lifetime.

About the Expert: Darren Helliwell

Darren Helliwell is a seasoned building performance specialist with over 25 years of experience in thermographic surveys, blower door testing, and airtightness consulting. He has worked on prestigious projects like Harrods, Battersea Power Station, and the Imperial War Museum, helping teams enhance building performance and energy efficiency.

Using advanced infrared cameras and complementary testing tools, Darren’s team identifies air leakage, insulation defects, and thermal bridging in both new and existing buildings. His mission? To empower homeowners, architects, and contractors with the insights they need to build better, healthier, and more efficient spaces.

👉 Connect on LinkedIn
📧 info@aptsoundtesting.co.uk
🌐 APT Building Thermography ReportsEvery home or building leaks energy—it’s just a matter of how much. In the UK, where energy prices continue to rise and the push toward net zero targets intensifies, understanding where your property is losing heat is more critical than ever. That’s where a thermographic survey, also known as a thermal imaging survey, comes in.

This advanced, non-invasive technique can uncover the hidden issues costing you money and comfort every single year—without tearing open walls or ceilings. Whether you’re a homeowner, landlord, developer, or business owner, a professional thermographic survey could be the key to unlocking your building’s full energy-saving potential.

What Is a Thermographic Survey?

A thermographic survey uses infrared cameras to detect and visualise heat patterns within a building. The resulting images, known as thermograms, make invisible problems instantly visible: areas where heat escapes, insulation is missing or poorly installed, air is leaking, or damp spots are forming.

This technology works by measuring temperature variations on surfaces and translating them into colour-coded images. Hot areas show up in warmer colours (like red or yellow), while colder areas appear in shades of blue or purple. The beauty of this method? It allows for fast, accurate assessment with no damage or disruption to your property.

Why Thermographic Surveys Matter in the UK

The UK housing stock is among the least energy-efficient in Europe. It’s estimated that around 26% of the country’s total energy consumption comes from domestic buildings, with 80% of that going directly into heating and hot water.

Despite this massive energy use, many homes continue to suffer from:

  • Poor insulation
  • Draughty windows and doors
  • Leaky roofs and walls
  • Unnoticed construction flaws

Even new-builds or recently renovated properties can fall short due to hidden gaps in workmanship or insulation installation. A thermal imaging survey is one of the fastest, most accurate ways to pinpoint these issues and create a roadmap for improvement.

Top Benefits of a Professional Thermographic Survey

Investing in a thermographic survey is about more than just diagnostics—it’s about actionable improvements that pay off. Here’s what you stand to gain:

1. Lower Energy Bills

By identifying and fixing draughts, thermal bridges, or insulation gaps, you reduce the amount of heat your building loses—cutting heating costs significantly.

2. Increased Comfort

No one likes cold spots, chilly corners, or rooms that never quite feel warm enough. Thermal imaging helps you eliminate these uneven temperature zones for a cosier, more comfortable indoor environment.

3. Early Damp and Mould Detection

Cold areas are prone to condensation, which can lead to mould and long-term structural issues. Thermographic surveys catch these problems before they become visible, protecting your health and your home.

4. Insulation Validation

Whether you’ve just installed new insulation or want to check the effectiveness of older material, a thermal imaging survey verifies whether it’s doing its job—saving you from wasted investments.

5. Sustainability and Compliance

From BREEAM standards to future government mandates on energy efficiency, thermal imaging helps you stay compliant and demonstrate climate responsibility. It also adds value when selling or renting your property.

What to Expect During a Thermographic Survey

If you’ve never booked one before, here’s how the process typically works:

✅ Tailored Consultation

We begin with a brief discussion about your property type, energy concerns, and goals. This helps us customise the survey to your specific needs.

✅ Best Timing

Thermal surveys are most effective in colder months or during times with a strong indoor-outdoor temperature difference—early morning or evening is ideal.

✅ Comprehensive Assessment

Our certified thermographers will scan both interior and exterior surfaces, using high-resolution infrared cameras to identify problem areas across walls, roofs, doors, windows, and floors.

✅ Professional Reporting

Within a few days, you’ll receive a detailed, illustrated report showing exactly where your property is losing energy—complete with explanations and recommendations for improvement.

✅ Expert Advice

Our team will walk you through the findings and help prioritise the most cost-effective and impactful upgrades.

Who Should Consider a Thermal Imaging Survey?

A thermographic survey is suitable for a wide range of properties and owners, including:

  • Homeowners looking to reduce bills and enjoy a warmer home
  • Landlords and property managers aiming to boost EPC ratings and tenant comfort
  • Buyers wanting peace of mind before a purchase
  • Architects and builders needing verification for new construction
  • Businesses, schools, and organisations working toward net zero goals

Whether you’re retrofitting an older home, quality-checking a new build, or developing an energy strategy for a commercial building, thermal imaging gives you the clear data needed to act.

Why Choose Us?

Not all thermographic surveys are created equal. With us, you’re getting industry-leading expertise backed by decades of hands-on experience. Here’s what sets our service apart:

  • Certified Thermographers: Our team is fully trained and certified to deliver accurate results.
  • High-Tech Equipment: We use top-of-the-line infrared cameras and support tools like blower door and smoke testing for enhanced diagnostics.
  • Fast Turnaround: Most surveys take 1–2 hours and reports are delivered within 5–10 working days.
  • Competitive Pricing: Transparent quotes with no hidden fees.
  • Regulatory Support: Assistance with BREEAM, EPC improvements, and building compliance.

FAQs

How long does the survey take?
Surveys usually last between 1 to 2 hours, depending on the size and complexity of the building.

Do I need to prepare my home?
Yes, but it’s simple. We’ll give you clear guidance, such as heating your home a few hours in advance and keeping doors and windows shut during the survey.

How soon will I get the report?
Your illustrated thermographic report is typically delivered within 5–10 working days.

Take the First Step Toward a Warmer, Greener Property

Don’t wait for another winter of high bills and cold rooms. A thermographic survey offers a fast, affordable way to make your property more efficient, comfortable, and future-ready.

Contact our expert team today to get a free consultation or instant quote. Most surveys are completed in under two hours—and the energy savings could last a lifetime.

About the Expert: Darren Helliwell

Darren Helliwell is a seasoned building performance specialist with over 25 years of experience in thermographic surveys, blower door testing, and airtightness consulting. He has worked on prestigious projects like Harrods, Battersea Power Station, and the Imperial War Museum, helping teams enhance building performance and energy efficiency.

Using advanced infrared cameras and complementary testing tools, Darren’s team identifies air leakage, insulation defects, and thermal bridging in both new and existing buildings. His mission? To empower homeowners, architects, and contractors with the insights they need to build better, healthier, and more efficient spaces.

👉 Connect on LinkedIn
📧 info@aptsoundtesting.co.uk
🌐 APT Building Thermography Reports

Why a Thermographic Survey Could Transform Your Property

Every home or building leaks energy—it’s just a matter of how much. In the UK, where energy prices continue to rise and the push toward net zero targets intensifies, understanding where your property is losing heat is more critical than ever. That’s where a thermographic survey, also known as a thermal imaging survey, comes in.

This advanced, non-invasive technique can uncover the hidden issues costing you money and comfort every single year—without tearing open walls or ceilings. Whether you’re a homeowner, landlord, developer, or business owner, a professional thermographic survey could be the key to unlocking your building’s full energy-saving potential.

What Is a Thermographic Survey?

A thermographic survey uses infrared cameras to detect and visualise heat patterns within a building. The resulting images, known as thermograms, make invisible problems instantly visible: areas where heat escapes, insulation is missing or poorly installed, air is leaking, or damp spots are forming.

This technology works by measuring temperature variations on surfaces and translating them into colour-coded images. Hot areas show up in warmer colours (like red or yellow), while colder areas appear in shades of blue or purple. The beauty of this method? It allows for fast, accurate assessment with no damage or disruption to your property.

Why Thermographic Surveys Matter in the UK

The UK housing stock is among the least energy-efficient in Europe. It’s estimated that around 26% of the country’s total energy consumption comes from domestic buildings, with 80% of that going directly into heating and hot water.

Despite this massive energy use, many homes continue to suffer from:

  • Poor insulation
  • Draughty windows and doors
  • Leaky roofs and walls
  • Unnoticed construction flaws

Even new-builds or recently renovated properties can fall short due to hidden gaps in workmanship or insulation installation. A thermal imaging survey is one of the fastest, most accurate ways to pinpoint these issues and create a roadmap for improvement.

Top Benefits of a Professional Thermographic Survey

Investing in a thermographic survey is about more than just diagnostics—it’s about actionable improvements that pay off. Here’s what you stand to gain:

1. Lower Energy Bills

By identifying and fixing draughts, thermal bridges, or insulation gaps, you reduce the amount of heat your building loses—cutting heating costs significantly.

2. Increased Comfort

No one likes cold spots, chilly corners, or rooms that never quite feel warm enough. Thermal imaging helps you eliminate these uneven temperature zones for a cosier, more comfortable indoor environment.

3. Early Damp and Mould Detection

Cold areas are prone to condensation, which can lead to mould and long-term structural issues. Thermographic surveys catch these problems before they become visible, protecting your health and your home.

4. Insulation Validation

Whether you’ve just installed new insulation or want to check the effectiveness of older material, a thermal imaging survey verifies whether it’s doing its job—saving you from wasted investments.

5. Sustainability and Compliance

From BREEAM standards to future government mandates on energy efficiency, thermal imaging helps you stay compliant and demonstrate climate responsibility. It also adds value when selling or renting your property.

What to Expect During a Thermographic Survey

If you’ve never booked one before, here’s how the process typically works:

✅ Tailored Consultation

We begin with a brief discussion about your property type, energy concerns, and goals. This helps us customise the survey to your specific needs.

✅ Best Timing

Thermal surveys are most effective in colder months or during times with a strong indoor-outdoor temperature difference—early morning or evening is ideal.

✅ Comprehensive Assessment

Our certified thermographers will scan both interior and exterior surfaces, using high-resolution infrared cameras to identify problem areas across walls, roofs, doors, windows, and floors.

✅ Professional Reporting

Within a few days, you’ll receive a detailed, illustrated report showing exactly where your property is losing energy—complete with explanations and recommendations for improvement.

✅ Expert Advice

Our team will walk you through the findings and help prioritise the most cost-effective and impactful upgrades.

Who Should Consider a Thermal Imaging Survey?

A thermographic survey is suitable for a wide range of properties and owners, including:

  • Homeowners looking to reduce bills and enjoy a warmer home
  • Landlords and property managers aiming to boost EPC ratings and tenant comfort
  • Buyers wanting peace of mind before a purchase
  • Architects and builders needing verification for new construction
  • Businesses, schools, and organisations working toward net zero goals

Whether you’re retrofitting an older home, quality-checking a new build, or developing an energy strategy for a commercial building, thermal imaging gives you the clear data needed to act.

Why Choose Us?

Not all thermographic surveys are created equal. With us, you’re getting industry-leading expertise backed by decades of hands-on experience. Here’s what sets our service apart:

  • Certified Thermographers: Our team is fully trained and certified to deliver accurate results.
  • High-Tech Equipment: We use top-of-the-line infrared cameras and support tools like blower door and smoke testing for enhanced diagnostics.
  • Fast Turnaround: Most surveys take 1–2 hours and reports are delivered within 5–10 working days.
  • Competitive Pricing: Transparent quotes with no hidden fees.
  • Regulatory Support: Assistance with BREEAM, EPC improvements, and building compliance.

FAQs

How long does the survey take?
Surveys usually last between 1 to 2 hours, depending on the size and complexity of the building.

Do I need to prepare my home?
Yes, but it’s simple. We’ll give you clear guidance, such as heating your home a few hours in advance and keeping doors and windows shut during the survey.

How soon will I get the report?
Your illustrated thermographic report is typically delivered within 5–10 working days.

Take the First Step Toward a Warmer, Greener Property

Don’t wait for another winter of high bills and cold rooms. A thermographic survey offers a fast, affordable way to make your property more efficient, comfortable, and future-ready.

Contact our expert team today to get a free consultation or instant quote. Most surveys are completed in under two hours—and the energy savings could last a lifetime.

About the Expert: Darren Helliwell

Darren Helliwell is a seasoned building performance specialist with over 25 years of experience in thermographic surveys, blower door testing, and airtightness consulting. He has worked on prestigious projects like Harrods, Battersea Power Station, and the Imperial War Museum, helping teams enhance building performance and energy efficiency.

Using advanced infrared cameras and complementary testing tools, Darren’s team identifies air leakage, insulation defects, and thermal bridging in both new and existing buildings. His mission? To empower homeowners, architects, and contractors with the insights they need to build better, healthier, and more efficient spaces.

👉 Connect on LinkedIn
📧 info@aptsoundtesting.co.uk
🌐 APT Building Thermography Reports

Clean Room Testing
Discovering Clean Room Testing Services

Discovering Clean Room Testing Services

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Clean Room Testing Services: Ensuring Compliance

Cleanrooms are essential for safeguarding sensitive production environments, from nanotechnology and pharmaceuticals to aerospace and automotive manufacturing. To keep these controlled spaces performing as designed, a well-planned testing, certification, and maintenance programme is critical.

At APT Cleanroom Testing, we specialise in validating and certifying all types of cleanrooms, ensuring they meet operational objectives and regulatory standards.

Comprehensive Cleanroom Testing Services

We provide a full suite of cleanroom performance tests, covering everything from airborne particulate monitoring to airflow characterisation and environmental checks. Our services include:

Core Cleanroom Tests

  • Non-viable particulate monitoring
  • Airflow volume and velocity profiling
  • Air exchange rate calculations
  • HEPA filter integrity testing
  • Differential room pressure monitoring
  • Temperature and humidity monitoring

Using advanced smoke survey equipment, we also conduct detailed airflow visualisation tests to verify directional airflow and identify potential problem areas. To ensure cleanroom integrity, we perform air-tightness testing to detect leakage paths within the cleanroom envelope.

Accuracy, Documentation, and Minimal Downtime

Our expertise, coupled with a strong commitment to quality and customer service, ensures accurate, reliable test results with comprehensive documentation. We understand that cleanrooms are critical business assets, so we work efficiently to minimise downtime.

Following testing or full cleanroom validation, we provide a clear, structured report, often compiled and quality-checked while still on site. We take the time to walk you through your results, ensuring transparency and understanding at every stage.

All clients receive:

  • Full test certificates
  • Calibration certificates for all equipment used
  • Professional recommendations for performance or efficiency improvements

Particulate Testing and ISO Standards Compliance

APT Clean Room Testing engineers are trained to deliver validation services in line with the latest ISO standards and industry guidelines. Our meticulous approach, customer focus, and UKAS accreditation provide assurance that your facility meets all external calibration and compliance requirements.

ISO 14644-1:2015 – What’s Changed?

The revised ISO 14644-1:2015 standard introduced significant updates to cleanroom sampling procedures and data evaluation. Key changes include:

  • A more consistent, statistically valid method for determining sampling locations
  • Individual evaluation of each sampling point
  • A requirement ensuring, with 95% confidence, that 90% of the cleanroom area complies with particle concentration limits

These updates may require organisations to revise their validation plans and, in some cases, make changes to their cleanroom design or operation to maintain compliance.

Get in Touch Today

Want to learn more about how our cleanroom testing and validation services can support your operations? Contact APT Sound Testing on 01525 303905 or email info@aptsoundtesting.co.uk.