Sound Insulation Testing and Acoustic Consultancy Service
Welcome to our sound insulation testing and consultancy service! Our team of acoustic engineers provide high-quality sound insulation testing services for commercial and residential projects throughout London and the Southeast. Using our latest state-of-the-art equipment and expert acoustic techniques, we ensure that your property meets all relevant sound insulation regulations, Such as Building Regulations Approved Document E.

Sound Insulation Testing Services
Sound insulation testing has been around since 2004, and its important because it ensures that buildings are correctly constructed with a view to acoustics/reducing noise which allows occupants to have reasonable level of acoustic comfort, which mean less health issues, due to lack of sleep etc. i.e. which leads to less disruption and more productivity.

Sound insulation testing is not only important for reducing the disruption of people’s lives due to excess noise, but also because it can affect your compliance with building regulations, if you don’t pass your sound test, to be in breach of Part E and your tasked building inspector will not sign-off the building. This can lead to serious disruption and financial implications to the project handover.

To try and reduce the chance of your project failing the sound test, we provide a one stop acoustic design service, which includes acoustic consultancy and precompletion sound insulation testing. Each project is different, and we will work with you to create a customised solution that meets your specific needs.

Our Range of Sound Testing Services 

Our Acoustic Services Include:

• Acoustic Consultancy Services
• Sample Sound Insulation Testing
• Site check visits
• Precompletion Sound Insulation Testing
• Customized Sound Insulation Solutions

Contact APT Sound Testing
Contact us today to learn more about our sound insulation testing and acoustic design services and how we can help you achieve a sound test pass in compliance with Part E of building regulations. To help you prepare for your sound insulation test, please download our sound test checklist.

For more information, please contact us on 01525 303905 or visit us at www.aptsoundtesting.co.uk.

Thermal Imaging Surveys In London
From our Clapham office in Central London, we can carry out your Thermal Insulation Testing, professionally with our efficient experienced team of thermography engineers. We can provide an excellent service to the South East area from our Clapham base, covering many areas including, Central London, North London, South London, East London, West London, Croydon, Guildford, Slough, Reading, Maidstone and Hemel Hempstead.

Request a call from our experienced team of thermographic engineers or call us on 01525 303905.

APT Sound Testing provides specialist thermal imaging surveys to customers through all industry sectors throughout the UK including construction and facility management projects throughout London and the South East.

Specialising in electrical thermal imaging surveys and building thermography in London, APT sound Testing is one of a few companies that only use surveyors that are trained certified to a minimum of ITC Level 2, which is the minimum requirement to undertake BREEAM Thermal Inspections throughout London and the rest of the UK for practising thermographer’s.

We have over 15 years of experience carrying out building thermal imaging surveys in support of industrial and commercial applications, our thermal inspections reportage contains the required reporting structures to satisfy the requirements expected by Construction and Insurance Companies, Facility Managers, Building Control and BREEAM 2011 Assessors etc.

Here at APT Sound Testing we realise that thermal imaging inspections can be vital in establishing potential defects in your buildings at the earliest possible stage. This can save you time and money during future operations together with reducing the risk of making the wrong decision and potential building shutdowns.

The combination of highly trained and certified and experienced thermographic surveyors as well as high specification calibrated equipment, guarantee our customers the best possible thermal imaging survey report to meet all of your needs. Our thermal imaging team make sure that customer satisfaction comes first and our surveys are carried out with the upmost thoroughness and expertise.

Thermal Imaging to show Continuity of Insulation

Thermographic surveys can also be used to demonstrate compliance with Part L1 and L2 (2006 – current edition) of the Building Regulations. These regulations require that both domestic residential and commercial properties be able to demonstrate the continuity of thermal insulation to the entire building envelope, thermal imaging can be used to show compliance with these requirements without having to open up or remove parts of the structure that may otherwise cause damage and delay.

Surveys can quickly and effectively detect areas of missing, moisture-laden or damaged insulation in walls, ceilings, floors, etc. This is particularly beneficial for buildings with poor energy ratings, where improvements can be focused on the most relevant areas.

BREEAM Thermographic Surveys in London

BREEAM Thermal Surveys must be conducted by a thermographer listed on the UKTA website as a certified Level 2 PCN thermographer. Out thermographer’s hold Level 3 certification so they more than meet the minimum requirement.

The weather conditions and planning for this type of survey are important. The thermal survey should comply with BS EN 13187 and other good practice. It is a requirement of the BREEAM scheme that a copy of the thermographer’s Level 2 certification is provided as evidence in addition to the thermography report.

Combined Air Tightness and Thermal Surveys in London

One of the major areas Building Regulations Part L relates to building efficiency and the air tightness of the building envelope. To comply with these new regulations, buildings have to be tested by a certified air tightness company to check for excessive leakage. When Thermal imaging is used in tandem with air tightness testing it becomes a very beneficial method for visualising and located were individual air leakage paths are occurring within the building envelope.

APT Sound Testing provides combined air tightness and thermographic testing of domestic and commercial buildings in London. In addition to this, when conducting a normal thermographic heat loss assessment, a blower door normally used for the air tightness testing, can be used by the thermographer to pressurise or depressurise the building to improve the accuracy of the thermal imaging survey. A combined air and thermographic test is the ultimate thermal assessment of the building. Using our combined tested methods we can uncover a higher level of information on uncontrolled air movement within the building structure, for example behind plasterboard, up through the floors or within cavities around the building. These may not be felt as draughts, but do result in excessive heat loss and a cold feeling in parts of the building and as such are very important for the occupiers of the building.

Thermal Electrical Inspections in London

Thermal imaging on electrical installations is a major contributor to improving safety and identifying problems before they happen in the workplace. Power and lighting distribution boards should be checked 6 monthly, annually or biannually. Many insurance companies require a thermal imaging survey to be completed to help reduce their losses, especially within commercial buildings.

Vibration and thermal stress can cause connections in power distribution systems to loosen, contamination can corrode these connections; both factors increase the resistance of the connection making every connection a potential candidate for overheating. Furthermore, if the problem is allowed to persist, a situation called “glowing connection” can arise which can generate significant heat without tripping the safety protection on that circuit.

Fire avoidance: Loose or overloaded circuits can arc, get extremely hot, melt cable insulation and eventually catch fire. Thermographic inspections can instantly identify this, with this information you can then replace or repair the components before they fail, reducing or preventing facility downtime and/or costly repairs.

​The best way to keep up this predictive & preventative maintenance is by incorporating them into a regular condition-based monitoring program, this, in turn, will reduce or even eliminate unplanned shutdowns. We can set up thermal imaging monitoring programs for your London facilities and remind you as and when they are required.

Mechanical Infrared Inspection in London

Undertaking Infrared inspections of mechanical rotating equipment can identify excess heat caused by friction and wear. Some friction induced heating is normal in mechanical systems, but when it increases above typical operating temperatures, it can be a leading indicator of wear and a predictor of component failure.

Thermal imaging detects this heat and identifies problems while they are in their early stages, preventing a catastrophic failure. Early detection provides your maintenance the opportunity to take corrective actions to prevent failure and downtime on pumps, gears, bearings, gearboxes, conveyors couplings and heat exchangers etc.

We can undertake regular condition-based monitoring program, this, in turn, will reduce or even eliminate unplanned shutdowns. We can set up thermal imaging monitoring programs for your facilities and remind you as and when they are required.

Flat Roof Thermography Surveys in London

Infrared thermography can be used as a non-destructive method for leak detection in flat roofs. With use of thermal imaging cameras, our qualified Infrared Thermal Imaging Technicians will scan the roof and monitor the difference in temperature between wet and dry materials, helping to locate areas of water ingress. This can also flag areas which may be unstable due to hidden rot, and areas which may require further investigation.

A typical flat roof has little or no moisture between the roof membrane and the insulation/ decking, so when a leak occurs, moisture enters the roof and is absorbed by the insulation or decking. Dry materials heat up and cool down faster than wet materials, and the damp areas require more heat to increase their temperature/ take longer to release their heat. We use thermal imaging techniques to highlight such changes and identify both the source and extent of the moisture ingress. Typical roof decks can be made from a multiple of materials such as steel, wood or concrete; the material of the roof deck does not affect the thermal survey in London.

APT sound testing works with many flat roof companies within London to help highlight problems on new/existing flat roof construction. We provide a rapid and accurate service, provided both diagnosis and accurate reportage for minimal disruption to our customers.

Thermal Imaging for Part L Compliance in London

Thermal imaging is the only practical method for checking a completed building for its compliance with Building Regulations Part L in all areas. This part of the building regulations identifies the required performance of the insulation systems in the walls, floor and roof of any new building.

APT Sound Testing can provide a thermal imaging survey to show in a qualitative manner that there is reasonable continuity of insulation-in other words, to show that there are no areas with insulation missing. If there are areas of missing insulation, the thermal imaging survey will show where they are and how big they are. We can also assess the actual performance of the insulated wall or roof, as constructed and provide a U-value for parts of the building. It can be problematic and unrealistic to measure exact U-values, however we do have methods to calculate alternative measures of the insulation factor of a wall and some indication versus an expected U-value can be provided. We are happy to discuss this with customers who want to know more about this service.

Why our Level 3 Certified Thermographers produce better reportage

In our experience highly qualified thermographer’s produce higher quality and more technically consistent thermography inspection reports. Our highly trained Level 3 thermal engineers can troubleshoot, calibrate equipment, interpret data, and create reports.

When you are employing a thermographer, you should check to see that they incorporate the high specifications possible for their inspections. Are they certified to Level 3 and do they use large format FLIR thermal imaging cameras?

Our thermal inspection specification includes:

1. Level 3 thermographic certification
2. Level 3 qualified thermographers
3. Large format FLIR cameras with 45-degree lenses
4. Detailed, easy to follow thermal imaging reports

While thermographer certification represents an investment, it is an investment that typically pays in the long run. Not only do Level 3 certified thermal engineers produce higher quality inspections, but their thermal inspections are also more technically consistent! Uncertified, or lower-level thermographers are more likely to make costly and even dangerous mistakes! these mistakes may even result in serious consequences, such critical problems being completely missed. While the appropriate qualification is important, written inspection procedures are also important for attaining high-quality results and reportage.

Three reasons for undertaking Thermal Imaging Surveys in London

Thermal imaging surveys to assess the integrity of building envelopes are usually required for one of three reasons.

1. To help diagnose and record suspected problems with the building envelope or comfort levels – Where there are suspected problems with the building envelope such as moisture ingress, condensation and mould growth or where there is the perception that the thermal efficiency isn’t what it should be, the use of thermography can provide excellent visual and quantitative evidence of the causes of the suspected problems which can be used for targeted remedial works by the customer.

2. To identify potential improvements to reduce energy costs and CO2 emissions within the buildings – On existing buildings, thermography can be used to assess the overall performance of the individual building envelope. Once this has been established, informed decisions can be made on improving energy efficiency. If required, in depth analysis can also be undertaken to estimate the potential cost and CO2 reductions if particular improvements are undertaken to the existing building.

3. To demonstrate compliance with the construction specification on newly constructed buildings – Building Regulations Part L and sustainability assessments such as BREEAM are starting to include thermal inspections as part of the Building Specification. Thermal imaging surveys are help with quality assurance and to achieve the required sustainability rating.

Our usual sequence for undertaking our Thermal Imaging Service

1. APT’s friendly and efficient office thermal imaging team will take your information, and provide you with the contact number for your dedicated thermal engineer. Your engineer will deal with you throughout your works.

2. Once we have established whether your project, is an emergency or not, we will then act accordingly. We will require confirmatory notification of requirement for our thermal imaging engineer, to attend site prior to their attendance and inspection. This is so we can identify the type of thermal imaging surveys required along with potential access issues etc.

3. Our thermographer will travel to your London site and carry out the thermal imaging survey, depending on the nature of the work and the client’s instruction. The usual information gathered is recording, making reference to image numbers, equipment locations and details, load readings, temperatures, anomalies, and suspected root causes. In addition, our thermography inspectors will record an IR and DC image of every electrical panel inspected, along with our bespoke software we can open up a trending programme on the electrical equipment, this becomes a base line for later reference. It also satisfies your insurers that thermal imaging inspection has been completed correctly.

4. On completion of our London thermal imaging survey, our thermographer will issue an IR Thermography report to the facility manager/maintenance supervisor and make them aware of any potential problems, specifically critical issues that require immediate notification and client action.

5. Our reports are issues within 72 hours following the survey, APT Sound Testing will provide the full IR Thermography report via email in pdf format, unless otherwise request. We can produce quicker reports in the case of emergency thermal inspections – these are available upon request.

Thermographic Checklist for customers in London

What’s involved in a thermal survey?

The thermal survey would aim to be carried out under the recommended environmental conditions as detailed below this would be subject to weather conditions.

• Thermal Images would be captured of each elevation of the building from the outside with assessment/analysis included within the report.
• The building would then be scanned from the inside with thermal images and analysis recorded if anomalies are identified during the thermographic survey.
• Safe access and clear working areas will be required, especially if mechanical access machinery is to be used to aid the thermographic survey (i.e. in the event of surveying roofing or other difficult to reach areas).
• A minimum temperature difference of at least 10 degrees Celsius is required between internal and external areas. This may require heating systems to be on for at least 8 hours prior to commencement of survey.
• The thermographic survey should usually be conducted at night or early morning when environmental conditions are suitable and solar loading effects have completely disappeared to the building envelope.
• Please tape all ventilation within the building envelope as this will enable the engineer adequate time on site – ventilation includes intermittent extracts, mechanical extractors, fire vents, chimney openings, air bricks trickle vents, roof window vents, inlet – outlet mechanical ductwork- please note this list is not exhaustive and there may be other areas that need to be sealed.
• Ensure the building envelope is complete. All Glazing, external doors and cladding to be complete. All penetrations through the building envelope to be sealed.

Recommended Environmental Conditions

• Temperature difference across building fabric >10°C at the time of the thermographic survey.
• Temperature difference across building fabric >5°C for 24hrs preceding the thermographic survey.
• External air temperature to be within +/- 3°C during the thermography survey.
• External air temperature to be within +/- 10°C for the preceding 24hours.
• The external envelope surfaces to be free from solar gain.
• No precipitation just prior to or during the thermographic survey.
• Wind speed to be less than 10mph during the thermography survey.
• Ensure all building envelope surfaces to be inspected are dry during the thermographic survey.

General Thermal Survey Information

a. The thermography survey will generally be undertaken following completion of the building when site risks are substantially reduced just prior to building handover. It is important that the thermography survey is undertaken in a safe, planned and methodical manner.

b. The thermal survey requires the thermography engineer to view an image of the building through the view finder on the thermographic camera. Even though it is likely that the floor surface will be level and clear of obstruction during this stage pf the project, nonetheless special care should be taken to view the image in the camera display whilst at standstill.

c. If a large area of building envelope is under review, and mobile equipment is required to facilitate safe access etc. then extreme care is required and the surveyor must be attended by an assistant acting as banksman.

d. In many cases the thermography survey will be undertaken externally at night or early morning, in darkness. Special care must be taken to ensure that high-visibility clothing is worn throughput the survey. Assistance must be sought where risk of collision with vehicles exists.

e. If any roof surveys are required, they should only be undertaken by walking over the surface of the roof under the accompaniment of an assistant or the client’s trained representative. Safety harnesses must be worn at all times as and when it’s a requirement.

f. During the thermographic survey our engineer will collate the relevant information, recording the thermographic images, photographic images and taking notes to enable a concise report of the findings which will be compiled on return to our office.

Thermal Imaging Surveys in London & Home Counties

To learn more about our London thermal imaging surveys and how they can help you maintain your home better, call APT Sound Testing today. We have the equipment and experience necessary to identify underlying maintenance issues that can lead to expensive and unforeseen maintenance costs. Whether it BREEAM Thermal Imaging Survey be a Leak Detection Survey, an underfloor heating survey, a damp survey, or an energy efficiency survey, please contact us today and see how we can assist you.

Learn more about our Thermographic Inspection Service

To learn more about our London thermal imaging surveys and how they can help you maintain your home better, call us on 01525 303905. We have the equipment and experience necessary to identify underlying maintenance issues that can lead to expensive and unforeseen maintenance costs.

Whether it BREEAM Thermal Imaging Survey be a Leak Detection Survey, an underfloor heating survey, a damp survey, or an energy efficiency survey, please contact us today and see how we can assist you.

Smoke Leakage Surveys to Pass Air Tightness Testing
This article explains the use of combined air tightness testing and smoke surveys to pass air tightness testing, by identifying the air leakage paths in the external fabric of houses and commercial buildings. On past projects where we have encountered very ‘leaky’ buildings and subsequently failed the air test, we have managed to lower the air leakage rate from 40m3/hr/m2, down to a respectable 5m3/hr/m2 and attain pass for Part L compliance.  All this was accomplished using our combined air tightness and smoke leakage surveys.

Its common knowledge that excess air leakage can accounts for between a third and half of a typical home’s heat loss. Yet it’s often quite difficult to pinpoint air leakage and heat loss in both new building and conversion projects. The beauty of combined air tightness and smoke testing is it provides an accurate and visual approach to identifying and controlling air leakage in in buildings.

Blower doors equipment can be set up quite quickly and the test and smoke survey can be carried out in a matter of minutes, meaning that you can quickly and ascertain the buildings air leakage rate as well as receiving a comprehensive air leakage survey report, highlighting the air leakage paths within the building, so targeting sealing works can be undertaken by the contractor/builder at a later date.

What Smoke machines do you use during air leakage surveys?  

When it comes to smoke test surveys, we use 3 different types of smoke machines.  We have a smaller handheld smoke machine for standard houses. We then have our middle size smoke machine which uses pressurised smoke canisters, which is extremely useful for large houses and smaller commercial buildings and smoke shafts etc. we then have our large smoke machines that fill a large commercial building in minutes.

So, to recap, we use the different size smoke machines on the following buildings:

• Small smoke machine – houses, flats, and laboratories
• Mid-size smoke machine – small commercial buildings and smoke shafts
• Large smoke machine – large commercial buildings

In all instances, we always use our smoke machines with our blower door systems to accurately identify the air leakage paths in buildings. Without the inclusion of a blower door system to pressurise the entire building, you will only see small amounts of ‘wispy’ smoke drift, which makes it very difficult to identify and record the exact air leakage areas.

Buildings Air leakage paths identified during previous smoke leakage surveys

• Poorly installed windows and doors which do not close tightly
• Windows and doors with missing seals
• The gap at the wall/skirting board junction.
• Perimeter and internal wall/floor junctions.
• Gaps around service penetrations (such as water and electrical) through floor and walls
• Pathways through ceiling voids into masonry cavity walls
• Pathways through eaves in cavities
• Gaps around windowsills and door reveals
• Gaps around bathroom and WC services
• Gaps around kitchen and utility services.
• Gaps between dry lining and ceilings
• Unsealed chimneys
• Gaps around electrical and IT fittings
• Gaps around ceiling loft hatches
• Ventilation penetrations through the walls, ceiling, and roof
• Poorly installed extractor fans to kitchens, utility, and bathrooms

We can help you pass your air tightness test

At APT Sound Testing we have large amount of experience in understanding the requirements of Approved Document L, along with extensive experience of carrying out thousands of successful air tightness tests on a wide range of developments across London and the UK.

In order to achieve the required air tightness target (which is getting lower all the time) and to avoid the risk of a failed air tightness test, we strongly recommend that early consideration is given to the design of the air leakage line within your project.

By working with our customers throughout their design and construction stages, we can provide advice and guidance on the most feasible ways to avoid air leakage and attain compliance for the air tightness test. Please download our air tightness checklist to help you prepare for your test.

At APT Sound Testing, we are happy to provide you with general air leakage design advice for your building envelope and onsite guidance. Upon completion of your project, we provide Nationwide UKAS Accredited Tightness Testing for domestic and commercial buildings to help you demonstrate Building Regulation Part L Compliance. To find out more about our air tightness testing service or if you wish to discuss your project please contact us on 01525 303905 or email us at info@aptoundtesting.co.uk

Indoor Air Quality Testing for BREEAM
Indoor air quality testing for BREEAM is an essential aspect of new building design and construction. It is a crucial component of the BREEAM certification process, which is a widely recognized standard for sustainable building design and construction across the world. BREEAM Indoor Air Quality Testing aims to reduce the risk of health deterioration and building performance by testing the indoor air quality for the end-users.

As well as helping you to gain your initial (BREEAM) credit, by testing the indoor air quality our engineering team are then able to produce a bespoke indoor air quality plan. Our plans are able to provide you with the following benefits:

• Advice on removal of contaminant sources
• Dilution and control of contaminant sources
• Procedures for pre-occupancy flush-out
• Informative checklist to help you prepare for the third party testing
• Third party testing and analysis
• Advice on maintaining Indoor Air Quality In-Use

APT Sound Testing provides a wide range of air quality testing and advisory services to ensure that the air in and around your buildings is of optimum quality and meets regulatory and environmental requirements. Our test engineers have substantial training, skills, experience, and knowledge of testing a wide range of new build and refurbishment indoor environments.

We can undertake all your BREEAM Indoor Air Quality Testing requirements

Here at APT Sound Testing, we have significant experience in carrying out post-construction Indoor Air Quality (IAQ) testing. We are familiar with the stringent methods that are specified under BREEAM Hea02, Home Quality Mark (HQM) and other compliance standards. Our team will always provide a firm quotation and helpful checklist to help you prepare for the testing, prior to us visiting site to carry out this work.

We will ensure that all post-construction testing is carried out to the relevant standard that you are looking to achieve as specifications do vary.

When undertaking Indoor Air Quality Testing for BREEAM, we will typically test for Formaldehyde and TVOC in the air but can easily include other pollutants if required. We will normally sample rooms which will be occupied for long periods of time, for instance offices, hospitals and offices. It is important to make sure that a sufficient number of these rooms are tested in order to gain the relevant credit.

Our tasked team will make sure that all post-construction air quality tests are carried out in accordance with the very exacting BREEAM Hea02 methods. Our expert team will also provide free advice and guidance to your project manager to help to create the correct environment for the air quality tests as we have found over this years this to be very important.

To help you prepare for your Post Construction Air quality testing, please download our Indoor Air Quality Checklist. Need to add a BREEAM Indoor Air Quality testing checklist

Call or email us today about Indoor Air Quality Testing. We are here to help!

Call us on 01525 303905 or email us on info@aptsoundtesting.co.uk about our Indoor Air Quality Testing services. We are here to help! Alternatively, please visit our contact page here.

APT Sound Testing has been carrying out professional BREEAM thermal imaging surveys to check for insulation continuity for over 10 years. We use the highest resolution thermal imaging camera equipment and all our surveyors are all certified level 2.

Thermographic surveys are now a feature of BREEAM – the world’s foremost environmental assessment method and rating system for buildings. BREEAM sets the standard for best practice in sustainable building design, construction and operation.  BREEAM New Construction and BREEAM Domestic Refurbishment programs both recognise the benefit of a thermographic survey by awarding credits for a Level 2 certified thermographer carrying out a suitable thermal survey.

APT Carry Out Thermal Imaging Surveys in the following sectors:

• Data Centre thermal Surveys
• Building envelope thermal surveys
• Flat roof condition thermal surveys
• Thermal surveys on electrical and mechanical installations

Whether your building inspection is for insulation continuity in Part L2 (b) of building regulations, paths of air leakage, insulation checks or under floor heating inspections for either commercial or domestic projects, we have a survey to fit your requirements. Our integrity is guaranteed to bring you true results.

Our team of certified professional engineers are highly experienced in carrying out all types of thermal imaging surveys and have many years’ experience in all aspects of BREAAM, construction, engineering, maintenance and professional management thermal survey work.

Our thermal imaging equipment is the best and most accurate on the market, ensuring we pick up faults that other equipment may miss. Our reports are professionally generated and issued via email for quick access. We can normally turn around reports within 24 hours from the completion of the BREEAM survey. We endeavour to give our clients an ongoing proactive service, which is why we retain our clients year after year. We are passionate about what we do and gain great satisfaction from genuinely helping to make significant improvements to businesses and individuals.

Contact us today on 01525 303905 or visit our website If you require a Thermal Imaging Survey in London or anywhere in the UK, and our professional and certified Level 2 Thermographer’s will carry out your thermographic Inspections for BREEAM compliance in accordance with all necessary standards and current regulations.

All we need are a few details such as floor plans and elevation drawings and the building location to provide a quotation. We will also send across our informative checklist to help you prepare for the thermal survey.

Air tightness testing is a process that measures how much air leaks through the gaps and cracks in the fabric of a building. It is also known as air testing, air pressure testing, or air leakage testing. Air tightness testing is required for all new buildings, both domestic and non-domestic, as part of the Building Regulations Part L in the UK. But why is air tightness testing important? Here are some of the benefits of having an airtight building:

• Building Energy efficiency: An airtight building reduces the amount of heated or cooled air that escapes through the building envelope, which means less energy is wasted and lower energy bills for the occupants.
• Environmental impact: An airtight building also reduces the carbon emissions associated with heating and cooling, which contributes to tackling climate change and meeting the UK’s net zero target by 2050. Recent studies have  estimated  that buildings account for 40% of the UK’s total carbon footprint, so improving their air tightness can make a huge difference.
• Comfort and health: An airtight building prevents uncomfortable draughts, cold spots, and noise from outside, creating a more pleasant and consistent indoor environment. It also avoids condensation problems that can lead to mould growth and poor indoor air quality, which can affect the health and well-being of the occupants.
• Quality assurance: An air tightness test verifies the quality of the materials and workmanship used in the construction of the building, ensuring that it meets the standards and specifications required by the Building Regulations. It also identifies any defects or areas that need improvement, which can be fixed before they cause further issues or damage.

How to achieve a good air tightness test result

The key to achieving a good air tightness test result is to plan and prepare from the early stages of the design and construction process and using an air tightness champion to monitor the ongoing works. Some of the factors that affect the air tightness of a building are:

• Design for Air Tightness: The design of the building should minimise the number and size of openings and penetrations in the building envelope, such as windows, doors, pipes, wires, vents, etc. The junctions between different elements and materials should also be well detailed and sealed to avoid gaps and cracks.
• Building Materials: The materials used for the building envelope should be durable, robust, and compatible with each other. They should also have appropriate properties and performance characteristics for their intended use and location. For example, some materials may expand or contract due to temperature or moisture changes, which can affect their air tightness.
• Workmanship: The workmanship involved in the installation and assembly of the materials and components should be of high quality and follow good practice guidelines. The workers should be trained and skilled in applying the appropriate techniques and methods for achieving air tightness. They should also check their work regularly and rectify any errors or defects as soon as possible.
• Testing for Air tightness: The testing of the building’s air tightness should be carried out by a qualified and accredited tester using approved equipment and procedures. The testing should be done at an appropriate stage of the construction process, when all the relevant elements of the building envelope are completed and sealed. The testing should also be repeated if any changes or modifications are made to the building envelope after the initial test.

By following these steps, you can maximise your chances of achieving a good air tightness test result on your property, which will bring you many benefits in terms of energy efficiency, environmental impact, comfort and health, and quality assurance.

APT can help with your Air Tightness Testing

APT Sound Testing we have large amount of experience in understanding the requirements of Approved Document L, along with extensive experience of carrying out thousands of successful air tightness tests on a wide range of developments across London and the UK.

In order to achieve the required air tightness target (which is getting lower all the time) and to avoid the risk of a failed air tightness test, we strongly recommend that early consideration is given to the design of the air leakage line within your project.

By working with our customers throughout their design and construction stages, we can provide advice and guidance on the most feasible ways to avoid air leakage and attain compliance for the air tightness test. Please download our air tightness checklist to help you prepare for your test.

Simply get in touch via our contact form or call us on 01525 303905 to discuss your specific requirements with our friendly and knowledgeable acoustic and air tightness consultants.

The best way to prepare for a sound insulation test is to ensure that you prepare all the essential details of soundproofing your building for the sound test visit.

This includes:

1. Checking there are no holes or gaps, such as service penetrations present around the dwelling allowing sound to escape through party walls and/or floors.
2. Ensuring the party walls are correctly sound insulated inline with the acoustic design.
3. Check the party ceiling/floor has also should have some form of sound insulation.
4. Ensure there are not too many sockets or fuses sitting back to back in the room and the faceplates are fully installed.
5. Check all internal/external doors and windows are fully installed.
6. Ensure 240v power is on throughout the project.
7. Check no noisy construction works are taking place at the time of the test.
8. Ensure operatives are not working in the vicinity of the testing.

Airborne and Impact Sound Testing

When we undertake sound testing, we usually carry out two forms of testing, both airborne and impact. Both of these types of noise require a different procedure and accounts for different type of noise. Airborne sound requires needs the room to be kept as well sealed as tightly as possible so as to not allow sounds to escape the room. The sound associated with airborne noise are TV and music from Sound Systems etc. Impact noise refers to sound from footsteps, or any kind of impact such as the dropping of a rubber ball, or moving a piece of furniture such as a chair on a wooden floor.

Airborne sound testing usually needs to be carried out between pairs of rooms separated by party walls and/or floors. Most sound tests are carried out between living rooms and bedrooms as these are classed as the two main habitable rooms; however, other rooms can be used if this is not possible such as studies, kitchens and dining rooms. Impact sound testing usually needs to be carried out between floors only.

How long does the sound test take?

The amount of time its takes to complete the sound testing varies on each project as no development is exactly the same; however, as a rule of thumb a set of 2 airborne wall tests on pair of semi-detached houses will take approx. 1-2 hours. A six pack of tests on a block of flats, will usually consist of a minimum of 6 sound tests (2 airborne wall, 2 airborne floor and 2 impact floor tests) this will usually take approx. 2-3 hours.  The aforementioned test durations are dependent on our engineers having full free uninterrupted access between all the units/rooms under investigation, along with 240v power to each unit.

Contact us now for acoustic advice and sound testing

If you need help with your party wall and/or floor design we can help. We can undertake a full acoustic design for blocks of flats, or terraced dwellings and thereafter undertake sound insulation testing for compliance with Part E of Building Regulations.

For more information please contact APT Sound Testing on on 01525 303905 or email us at info@airpressuretesting.net. Alternatively please visit our website at www.aptsoundtesting.co.uk

Pre completion Sound Insulation Testing Services
Pre completion sound testing under Part E of Building Regulations has been a mandatory requirement since July 2003. We are a UKAS-accredited sound insulation testing laboratory providing our valued clients with a proactive sound testing service and reliable reportage to achieve building control sign off.

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 Testing is to be carried out between pairs of rooms separated by party walls or floors. Utilising our many years of acoustic design experience means that your project will be in safe hands from the initial design stage to the final pre-completion testing of the project.

Here is a concise introduction to sound insulation testing, and how APT can help you with your project.

Introducing Sound Insulation Testing
Sound Insulation Testing is measuring the airborne or impact noise coming through a partition. The partition is the floor, wall or ceiling and there will be different requirements for each. Part E Building Regulations, England, Wales and Northern Ireland, is a set of regulations for both new build and conversion residential builds.

Approved Document E was introduced in 2003, as a way of protecting residents from noise between dwellings. The regulations apply to all new-build and conversion constructions with residences next to one another.

How many sound insulation tests are required?
Approved Document E, requires that various walls and floors are tested between adjoining dwellings. The exact number of walls requiring testing will vary depending on the overall size of the development and the amount of different types of wall or floor constructions.

On a typical small to medium development consisting of up to 10 dwellings with the same partition construction the project will usually require one single 6 pack. This consists of 2 airborne wall tests, 2 airborne floor tests and 2 impact floor tests. On a pair of semi-detached houses you may only require 2 airborne sound tests through the walls.

What levels do I need to achieve to pass my Sound Test?
To pass your sound insulation testing in compliance with Approved Document E, you will need to achieve the following sound insulation results:

For separating floors & walls on new build projects:

Separating Floor Between Flats Airborne Noise Reduction = 45dB Dn T,w + (Ctr) or greater
Separating Floor Between Flats Impact Noise Reduction = 62dB Ln T,w or less
Airborne Wall Tests to achieve 45dB Dn T,w + (Ctr) or more

For separating floors & walls on conversion projects:

Separating Floor Between Flats Airborne Noise Reduction = 43dB Dn T,w + (Ctr) or greater
Separating Floor Between Flats Impact Noise Reduction = 64dB Ln T,w or less
Airborne Wall Tests to achieve 43dB Dn T,w + (Ctr) or more

How do I prepare for a Sound Insulation Test?
In all cases the more complete a development, the more likely it is to pass the sound test and achieve the requirements of Approved Document E. When we send out our quotation we also forward a specific sound insulation checklist to help our client prepare for the testing.

Basically if you meet the following criteria will generally have a much better chance of passing the testing at the first attempt.

1. Site noise should be kept to a minimum with no power tools, generators, radios, fire alarms etc. operating
2. Walls, floors and ceilings must be completed
3. Windows & external doors must be fully fitted, glazed and closed
4. Any ventilation systems should be installed and closed
5. Internal doors should be hung and closed.
6. Skirting boards, electrical sockets and light switches should be fitted.
7. To test impact sound transmission, we can only test the fabric of the building, therefore there must be no additional final finish floorings fitted
8. Rooms in which testing is to be carried out should be empty and tidy with safe access.
9. No-one else should be working in the building during the test
10. Free access to the properties on both sides of the separating partition is required
11. 240v (50Hz) mains power is required within the property to run our test equipment

For more infomration call us today at 01525 303905. We offer a friendly and proactive design, consulting service for all your compliance and certification requirements.

Remember, we provide UKAS accredited sound testing for London and the whole of the UK as required by Approved Document E of the Building Regulations. So you know you are in safe hands.

BREEAM Thermographic Inspection Services
APT undertakes BREEAM thermal imaging surveys specifically tailored to meet the requirements of BREEAM. The thermography surveys can contribute towards extra credits for overall BREEAM certification and provides visual evidence to the energy performance of a building.

The BREEAM (Building Research Establishment Environmental Assessment Methodology) is a structured to analyse, rate and certify a building’s environmental and sustainability characteristics for both new build and refurbishment projects.

The standard that contains the requirements for a BREEAM thermal imaging survey is the SD5078 BREEAM UK New Construction standard. This was launched in 2014 and the section that deals with thermography is contained within thermal comfort for health and wellbeing. The aim of the BREEAM scheme is to mitigate environmental impacts throughout the life cycle of new buildings cost effective and robust manner.

The following text contains the necessary criteria set out within the BRE SD5076 scheme for gaining the extra credit/s for your project.

One Credit – Testing and Inspecting Building Fabric

The commissioning and testing schedule and responsibilities credit is achieved.
The integrity of the building fabric, including continuity of insulation, avoidance of thermal bridging and air leakage paths is quality assured through completion of post construction testing and inspection.

Dependent on building type or construction, this can be demonstrated through the completion of a thermographic survey as well as an airtightness test and inspection (see compliance notes 3 and CN3.4. The survey and testing is undertaken by a Suitably Qualified Professional (see Relevant definitions) in accordance with the appropriate standard.

Any defects identified in the thermographic survey or the airtightness testing reports are rectified prior to building handover and close out. Any remedial work must meet the required performance characteristics for the building/element.

Only Level 3 Thermographers are used for our thermal imaging surveys

The importance of using one of our Level 3 trained thermographers cannot be understated as they are trained to be write predictive maintenance and inspection practices and to develop test procedures and ascertain severity criteria. To try and help clients prepare for the BREEAM thermal imaging survey to their building, we have written the following article: How we carry our thermal Surveys on commercial buildings.

Here is some more information in regards to the new BREEAM Technical Standards as well as scoring extra BREEAM credits for your new development.

BREEAM provides extra points to projects that have a BREEAM Thermal survey undertaken. As not many clients are aware of BREEAM thermal surveys, we have included more information in our ‘What is a BREEAM thermal Imaging Survey’ article. Also to try and help clients prepare for their survey please download our Thermal Imaging Checklist.

Please contact us for more information

Contact us today If you require a Thermal Imaging Survey in London or anywhere in the UK, and our professional and certified Level 2 Thermographer’s will carry out your thermographic Inspections for BREEAM compliance in accordance with all necessary standards and current regulations.

All we need are a few details such as floor plans and elevation drawings and the building location to provide a quotation. We will also send across our informative checklist to help you prepare for the thermal survey.

Sound Insulation Testing – Questions & Answers
APT sound testing often get asked a similar bunch of questions in regards to sound insulation testing. Over the last couple of years we have collated these questions and answers and to help our valued clients we have shown these below.

What is sound testing for Part E
Sound Insulation Testing is a method of quantifying the sound insulation performance of  walls and/or floors. Sound testing can be carried out on party walls, party floors or facades of any building.

What is sound insulation?
Sound insulation is the property of a wall and /or dividing partition to resist the passage of noise.

Why do I need sound testing on my Project/Property?
The largest single reason for disputes between neighbours is noise complaints. Approved Document Part E – Resistance to the passage of sound describes minimum standards to be achieved by newly built domestic dwellings.

What building regulation do we work to?

Approved Document Part E, sets out minimum standards for sound insulation performance to be achieved by party wall and party floors. Building contractors may show compliance with Part E of the Building Regulations by two methods. One method is to register plots to be built with Robust Standard Details Limited and the other is to show as-built performance by Pre-Completion Sound Testing to Part E of Building Regulations.

When are Pre-Completion Sound Tests carried out?
Pre completion Sound testing is carried out when the construction of party walls and floors are largely complete. Windows should be in place with any vents closable. Internal and external doors should be in place, along with skirting, cornicing and plug sockets in place. Sound testing on floors must be carried out before any soft coverings are in place.

 Do detached properties require sound testing for Part E of Building Regulations?

No, only attached properties require sound tests, detached properties share no common partitions with any other properties.

Are internal walls/floor between rooms within a single dwelling sound tested?
No, Laboratory test based performance standards (Rw) exist for certain internal walls and floors, but they are not intended to be verified as-built by on site measurement and therefore sound insulation testing is not a requirement.

How many sound tests are needed on my Project?

Approved Document E states that one set of sound tests is required for every 10 units in a group or sub-group. A group or sub-group is defined where significant differences in construction or layout occur, for instance:

• For a pair of semi-detached Houses – a set of tests would usually comprise two airborne sound insulation tests of a separating wall.
  
• For Flats (up to 10 units) – a six pack would normally be required, this comprises of: two airborne wall tests, two airborne floor tests and two impact floor sound tests. The easiest way to work out the number of tests required is to multiply 1 x 6 packs for every 10 flats, i.e. if you have 22 flats you will require 3 x 6 packs which equals 18 sound tests in total.
  
• For Rooms for Residential Purposes (student accommodation, hotel rooms, care homes etc.) – a set of tests would usually comprise: one airborne sound insulation tests of a separating wall; one airborne sound insulation test of a separating floor; one impact sound transmission test of a separating floor.

How are plots selected for Sound Insulation Testing?
We will usually specify the sound insulation tests that are required. We first look at the plans then work a testing schedule taking into account testing through both the projects lounges & bedrooms where possible. We will also try and undertake testing across walls and floors in different areas of the building.

The building control officer, warranty provider or other concerned parties may require you to carry out sound testing in specific areas or plots. However where this has not been stipulated we can advise accordingly. When we have specified the sound testing schedule it should always be checked by building control and/or the client to seek their approval before the commencement of testing.

How do I Preparing my Site for Sound Insulation Testing?

APT always send out a checklist with our fee proposals to help you prepare for the sound testing, as we always want our clients to be fully prepared so they can pass their sound testing at the first attempt.

Will the sound insulation testing disrupt work on site? 
There should be minimal site disruption during the sound insulation testing. However, although high levels of noise are generated but in order to make accurate test measurements, relatively quiet conditions are needed to take accurate measurements. This means that anyone working in the testing area will have to leave temporarily and any noisy works in the vicinity of the test rooms will need to be halted i.e. using power tools.

How long will the Sound Insulation Testing take?

The time taken for London sound testing varies with site conditions, but generally a ‘6 pack’ set of tests on houses and flats takes about one to two hours. Obviously this depends on the site being fully prepared in line with our sound testing checklist.

How do I know if I’m ready for a sound insulation test?
The plots should be at least at second fix stage – for further details please refer to our checklist.

Do I need all internal and external doors and windows installed?
Yes, all internal and external doors must be fitted and operable prior to the sound testing. Trickle vents must also be installed where required.

 What if I only have 110 volt on site?

Unfortunately we cannot undertake the testing; we will need 240V to undertake the sound insulation testing.

Should I inform my neighbours of the impending sound testing?
If the building is attached in any way to occupied properties then you will need to inform the neighbours. To comply with Part E we need to gain access to the neighbouring properties to undertake the sound test. You will need to ensure that access is provided to the neighbouring properties throughout the sound testing.

Can you offer advice to help me to pass my sound insulation testing?
We offer an acoustic design service to help you design your buildings partitions to pass Part E sound testing. If you send through the relevant drawings such as sections and plans during the design stages of the project, we can check the design to see if there are any junctions or details where ‘noise flanking’ may occur. You can then change your design to lower the chance of a sound test failure.

Do you have a check-list to help us prepare for the sound testing?
Yes, we have an informative checklist to help prepare for the testing, please visit our website at www.aptsoundtesting.co.uk to download the checklist.

Is it easy to upgrade the sound insulation in my Existing Home?.

Yes of course. If excess noise is causing you stress and anxiety, in comparison upgrading the walls/floors to your existing property can be a worthwhile process. its normally quite easy to upgrade walls and floors/ceilings to lower sound transmission. Sometimes it can be as easy as installing an acoustically (insulated) backed board against the offending partition. In all instances it is important not only that the right products are used to cause minimal disruption but they are also fitted correctly in-line with manufacturer’s guidelines. .

Rest Assured

We believe in working with our clients whether they are existing home owners suffering acoustic problems or large developers requiring a more expansive service to achieve sound testing compliance. We believe that by being involved at the beginning of a project we can often save our clients expensive and difficult remedial works at the completion stage of a project.

If you would like more information on our full range of services, including Sound Insulation Testing, please contact us now at info@aptsoundtesting.co.uk or call us on 01525 303905.