Sound insulation testing is used to measure the resistance of sound provided by an element of a building (such as a floor or wall) between dwellings. It essentially measures the effectiveness of the sound proofing treatment installed as part of a build or property development. It has been a mandatory part of the Building Regulations for new build and refurbishment projects since Approved Document E (ADE) was revised in 2003.

Building Control does not issue completion certificates to buildings that don’t have a sound insulation certificate. Contractors and developers have sometimes discovered this, to their detriment. As a result of this, we try to ensure that you are issued with a sound insulation certificate as fast as possible. When the tests are completed, we work quickly to issue your certificates; we take great pride in our efficiency.

AF Acoustics’ competent and well-trained engineers, who will be available for testing, can even let you know the verbal results of your sound test. You will receive a written report in the space of a working day.

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Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com

What Sound Insulation Testing Does

To adhere to Building Regulations ADE requirements, adjoining walls, floors and ceilings in a building will have to be tested, except where licensed Robust Details were used. Sound insulation tests examine airborne and impact sound moving between separating walls and floors. The tests include party walls and floors between structures or between spaces within a new development.

What is involved in a Sound Test

A sound insulation test creates a high amount of noise but needs a site with low noise levels to be taken effectively. As a result of this, workers in a testing area might have to leave the development temporarily, so that the test can be free from errors. The way a sound test is administered depends on the size and type of building and the development’s condition. A dwelling or development of normal size and simplicity will more than likely be tested in 90 minutes.

Once it is completed, the engineers will give a verbal interim result on the site and basic helpful information on what was noticed during the test, e.g. possible sound issues and future places that could cause problems.

A full and thorough report with the certificate of the test will be given to you within 24 working hours. The sound testing guidelines are stipulated in Building Regulations ADE. It requires one set of test to be conducted on 10 units in a group or sub-group. You can find out what is meant by a sub-group in Section 1 of ADE. Buildings are divided into three kinds for the test – houses, flats and rooms built for or converted to residential dwellings, like student accommodation, care homes and hotel rooms. How much testing that is required for each category can be found below.

Why is Sound Insulation Testing Required? Why is it Important?

Document E of Building regulations, from 2003, made it compulsory for all new UK constructions to undertake a pre-completion sound test. The minimum airborne sound insulation test result should be 45dB DnTw+Ctr while the maximum impact sound test result should be 62dB L’nTw. These result limits were put in to create and maintain a uniform standard for sound resistance in different parts of a dwelling and between adjacent buildings. Testing for sound insulation is vital because sound influences how we live in the office, while relaxing or in the house. Restricting the sound that moves between floors and walls could result in a more relaxed and better surrounding.

There are so many more reasons why sound insulation and speech privacy are vital. An inefficient sound insulation treatment will lead to uneasiness for the inhabitants of the dwelling. It would mean noise moving from one flat to another in a block of flats. If, for example, an occupant works at night and happens to hear loud music from a neighbour upstairs on a weekend night, it would be very discomforting. This is one way sound insulation can affect how a person lives. In a structure with flats for mixed purposes, a sound insulation test will make sure that there is maximum sound resistance from party walls and floors and less noise.

How to Know if You Need Sound Insulation Testing

If you’re doing one of the following, then you need a sound test:

  • Constructing a building that has two or more units
  • Constructing a nursing home or rooms that will be lived in, e.g. hotel room or hostel
  • Converting a single development to flats
  • Using designs where Robust Details are not included

It is imperative that sound insulation tests be undertaken, as explained and stipulated by ADE.

There are two ways in which to show compliance. You can either test to the regime set out in Approved Document E (ADE), or pay to use Robust Details. Robust Details are design details for separating elements, which have been tested before to comply with Document E standards. When you use it, you don’t have to take a sound insulation test. However, you must abide strictly by the design from the Robust Details approved list. This becomes difficult when you need to pick a more appropriate or cost-effective design that will suit your needs. Sound tests enable you do that, making it more flexible. When on-site pre–completion building sound tests are taken, architects have more scope with their design and can increase the sound insulation performance of the construction.

How Much Will I Pay for a Sound Insulation Test?

Call us or email us to get a free quotation for your building. We have tested all types and sizes of construction in the UK and issue a report and sound test certificate within 24 working hours. We offer one of the best prices. If you get a better price from another company, let us know and we will try to beat it.

When Should the Sound Tests be done?

A sound test is usually conducted just before the construction is completed, and when all the doors and windows have been fixed. However, we can test your building earlier to check for problems. For your sound tests to be conducted successfully we need the property to be quiet, with workers not near the rooms to be tested during the test time (a noisy environment makes the test difficult and sometimes unsuccessful). We also need access to all units unless the test program has been compiled earlier. Finally, we need 240V power supply.

How a Sound Test is Done

Our sound test engineers can answer your questions and make the sound test process easy to understand on site, during the time of the test. The separating walls undergo airborne tests while separating walls and floor undergo airborne and impact tests.

A big or multidirectional speaker, with a generator of pink or white noise is used to the biggest room. The sound in the source room and receiver room (sharing a separating wall with the source room) is measured with a sound level meter. The background noise level is also measured. The higher the background noise then the higher the source noise will need to be set, since the resulting noise level in the receiver room needs to be 10dB higher than the background noise at all measured frequencies. For airborne tests, two speakers positions are used in the source room and the level of noise entering into the receiving partition room is measured. That way the difference in sound level is calculated.

The sound difference is adjusted to make an allowance for reverberation time (time in which the sound decays by 60dB) and background noise in the receiver room. Impact tests are done by placing a standardised tapping machine on the floor. The noise level is then recorded in the room below. Calculations are done and the outcome is checked against ADE requirements for the type of building. Of course, this is a simple way of describing the procedure followed when a sound test is carried out, but it enables you to understand it better.

Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com

Type of Sound Insulation Test Machines We Will be using

Our accredited engineers are testing to the current standards. We use only UKAS calibrated equipment, as stated by the building regulations. An airborne test is used to check how much sound is moving through the air between partitions. We use pink or white noise generator and speakers on one side of the partition. A sound level meter is used on calculating sound in both units. For impact sound testing, the equipment used is a tapping machine that uses dropping hammers to create noise and a sound level meter. The tests are administered in room with residential purposes. For example, kitchens/living spaces, lounges, bedrooms and living rooms. Test findings are fed into a report that will be sent to the client. This report will always be acceptable to Building Control and will help you to get your development signed off.

Sound Insulation Testing is necessary for these types of builds:

Sound insulation tests examine airborne and impact sound moving through buildings. It is usually undertaken between party walls and floors between buildings or between spaces within a new development.

A structure with 2 or more units/flats

This ensures that a sound insulation system installed in residences meets the requirements of ADE.

Converting a single development to flats

When turning the single dwelling into several flats or units, the sound performance requirements of Building Regulations must be met.

Design that don’t have Robust Details factored in

The Robust Details scheme was set up in 2004 by Robust Details Ltd as a way to help architects and builders design and construct separating elements with the confidence that the separating wall and/or floor will be capable of achieving the sound performance parameters in Approved Document E, and comply with the Building Regulations. Once the design does not strictly abide by the design from Robust Detail approved list, the structure will have to undergo a sound test to ensure it conforms to Building Regulations. The minimum requirements are dependent on the kind of dwelling. Permanent dwellings and rooms for residential use have different requirements.

Where doses AF Acoustics conduct tests in UK?

As an acoustics design services firm, AF Acoustics provides acoustic consultancy to various individuals and businesses nationwide, especially in Hampstead. Af Acoustics work with individuals, government agencies, planning and environmental consultancies, and architects. We’re based in several strategic locations in the south east of UK to enable you get the best quotation and price possible.

Why AF Acoustics is the best choice for sound insulation testing

Our sound insulation testing expertise at AF Acoustics have aided several home and business owners in Hampstead. We come highly recommended by our clients because of the guarantees when you work with us

Sound testing experience of over 15 years

We are able to offer helpful functional solutions that will solve our customer’s needs. We have over 15 years of experience satisfying the acoustic needs of UK businesses and homeowners with a proven track record on both small scale and major projects. You can always rely on us for exceptional value for money.

Great prices

To make sure you can afford high quality sound insulation projects in UK, we offer one of the most affordable prices in Hampstead. Contact us immediately and we’ll give you a free quote on the sound test.

Fast and efficient consultancy

Our expert acoustic advice is tailored to your specific needs based on our experience which enable us to provide strong solutions. We will give you the right answers and expert guidance so that you can get effectual solutions to your problems.

Test dates that are adaptable

Our test date options let you pick what will suit your schedule because your comfort is essential to us. Take the first step towards your sound insulation testing in Hampstead by calling us now.

Get your test reports quickly

We try to provide test reports within 24 working hours. That way, you can take the right action based on the results of the test. The delivered report will be comprehensive and well detailed to ensure all relevant issues are covered and any recommendations are provided.

The sound testing services we provide

AF Acoustics offer a range of comprehensive acoustic solutions to customers nationwide, and we guarantee a high-quality and high-efficiency approach. Contact us now for more information on how we can assist you with your acoustics requirements.

Impact and airborne floor test

These are performed on floors and/or ceilings between units. The calculation of the sound level transferred from one unit to another through a separating floor via impact is called an impact test. Impact and airborne testing is undertaken between party floors.

ADE testing

Our sound insulation tests meet the requirements of Building Regulations Part E, which describes building structures resistance to the movement of sound within and from adjoining structures. 62dB L’nTw or less impact sound and 45dB DnTw+Ctr or higher airborne sound insulation is the required result for newly completed constructions. On the other hand, 64dB L’nTw or less impact sound and 43dB DnTw+Ctr or higher airborne sound insulation is expected from refurbished buildings.

Sound insulation test

With our professional and highly skilled expertise, we are willing to work with our clients to help them get a pass certificate in every situation. A new dwelling may have to undergo an airborne and impact test to meet the benchmark of greater than 45dB DnTw+Ctr and less than 62dB L’nTw. We regularly provide consultations for project managers and developers from the very start of developments, ensuring peace of mind when it comes time to having a sound test. Simply contact us immediately ad you’ll get a free quotation in addition to more details about our sound testing services.

Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com

Acoustic design tests in schools in accordance with BB93

Building Bulletin 93 (BB93) explains the sound performance requirement for the acoustics of school buildings. It likewise states how a school can meet this requirement. If building a new school in Hampstead, we can test the school to check if it meets the requirements of BB93.

Acoustic plan

AF Acoustics provide detailed acoustic design services and consulting on a wide range of buildings. We have the capability and experience to develop customised solutions, and have a strong working knowledge of available proprietary acoustic products. We will develop detailed design solutions suitable for the specific demands of the project.

Getting advice on the acoustics of a development as early as possible is crucial. AF Acoustics can enable you to do that by advising you on the appropriate acoustic requirements of your property very early in the building process and recommending what to do to fulfil them.

We can assist with:

Acoustic detail design for architects engaged with residential improvements in consistence with Part E Building Regulations, BS8233 and so on. Detail layout for the commercial, health and educational constructions in order to align with regulations. Construction designs and specifications for sound control in residential areas and other noise sensitive developments. Increasing sound through public enterprise and sound reinforcement systems in conference rooms, halls, lecture theatres and the like.

Contact AF Acoustics specialist for sound insulation test quotes

AF Acoustics is a leading acoustic consultancy. It provides the following services: architectural and building acoustics, acoustics design, survey and investigation in the field of planning and noise, and examining and controlling air vibrations while conducting air leakage tests. Our professional guidance and advice is provided to private individuals, businesses and government agencies amongst others. You can contact us by sending us an email on info@af-acoustics.com or calling us for a free quote.

020 3372 4430 Contact us

Please send the following information to us

When contacting us for sound insulation testing quote, we will need you to provide the following information

Location of development

Provide the location of your building in Hampstead.

Total number of dwellings

Total number of dwellings in the building.

Number of floors in the building

For an accurate calculation of the quote, tell us the number of storeys

Number of dwellings per floor

Tell us how many units are in your structure so that we can give you the right calculation for your quotation and know the scope of the test.

Type of development

What is your building type? This will help us know the kind of test it will undergo.

Newly completed construction or conversion

These two go require different types performance, so let us know which one it is and you’ll get an accurate test and quotation.

Sound testing regulations

We undertake sound insulation test on various buildings that adhere to Building Regulations Document E. Testing can also enable you get more credits for Code for Sustainable Homes and EcoHomes environmental assessment constructions.

Sound resistance: approved document of building regulations (England and Wales)

We can have fully accredited engineers sent to your property at your convenience to provide certification for Building Regulations Part E compliance, recognised by Building Control.

Scotland Standard division for completed constructions

Section 5.1 of the Scottish Building Standards stipulates that “Every building must be designed and constructed in such a way that each wall and floor separating one dwelling from another, or one dwelling from another part of the building, or one dwelling from a building other than a dwelling, will limit the transmission of noise to the dwelling to a level that will not threaten the health of the occupants or inconvenience them in the course of normal domestic activities.” The following are exempt from the testing techniques given in annex 5.C. of the Scottish Standard and Standard 5.1 – completely segregated rooftops, houses or walkways whose access is only used for upkeep or for the utilization of the inhabitants of the dwelling beneath.

How to make sure you pass your sound test

All you have to do to pass your sound test is include adequate sound insulation in the design. That way, you save time and cost for repair work and re-test. We offer design services to enable separating walls and floors with good sound insulation to meet the requirements of ADE, 2003. Whether you want some initial tests on your project, or comprehensive reports at the end, we can help you at the level that you need. The are required in order to have good conditions to undertake the sound insulation tests: All windows and doors have been fitted and work Skirting boards are fitted Light fittings and switches and plug sockets are fitted and working. Our professional acoustic professionals work with contractors, architects, developers, and planner from the beginning of the design to make sure that all requirements are met.

Certificates for test evaluation and report

To obtain a thorough evaluation of your building, we issue a report certificate within 24 working hours where possible. Our highly capable sound test engineers will give you a verbal result of the test, once the test is taken and proffer solutions to possible problems or future areas of concern. 6. Even before you get the certificate, you get the verbal results of the test. First, our completely skilled and competent sound insulation test engineers give you a verbal result at the site. They also offer advice on potential problems. Then the test report certificate is sent to you within 24 working hours, when feasible.

How the results are

Your test certificate will show if your development passed or failed the test and show if it adheres to the requirements of Part E of Building Regulations. If parts or all the building fails the test, repair work and a retest is recommended. We provide design advice to ensure your property does proper remedial and meets up with the necessary requirements.


Sound Insulation FAQ’s

The minimum requirements depend on a variety of factors such as if the development is a new build or refurbished, whether the development is intended to be a permanent dwelling, or classified as “rooms of residential purposes” (e.g. hotels, student accommodation, etc).

New builds must achieve impact sound test results of no more than 62dB L’nTw and airborne sound insulation of no less than 45dB DnTw+Ctr. Converted properties must achieve impact results of 64dB L’nTw or lower and airborne sound insulation of no less than 43dB DnTw+Ctr.

Flanking sound (or flanking noise) is sound that transmits between spaces indirectly, going over or around, rather than directly through the main separating element. This can allow sound to transmit between spaces even though the main separating element itself provides good acoustic insulation. Engaging our services at an early stage allows us to check designs and add necessary measures to prevent this occurring after construction. In the worst cases, flanking can exceed the direct transmission and lead to a failed test, despite highly specified partitions.

In the case of impact sound, the building construction is caused to vibrate as a result of a physical impact, such as footsteps on floors or stairs. The resulting vibration is radiated into other rooms in the building.

We can provide preliminary results on the day of test. We strive to deliver next day reporting in all scenarios regardless the complexity or size of the project. The delivered report will be comprehensive and detailed, to ensure all relevant issues are covered. The best recommendations can also be sent in a separate report or email.

We can normally conduct up to a maximum of three sets of tests per day. One set is two airborne floor tests, two airborne wall tests and two impact floor sound tests.

When it comes to the acoustic tests, a full set of tests should take approximately 90 minutes.

The requirements of sound insulation testing are fully detailed in the Building Regulations Approved Document, available here [link], under Part E (2003).

This requires all residential buildings to be tested when they involve walls and/or floors. These are known as party elements.

Assuming no tests are failed, building control bodies should stipulate at least one set of tests for every ten dwelling-houses, flats or rooms for residential purposes in a group or sub-group.

New builds must achieve impact sound test results of no more than 62dB L’nTw and airborne sound insulation of no less than 45dB DnTw+Ctr. Converted properties must achieve impact results of 64dB L’nTw or lower and airborne sound insulation of no less than 43dB DnTw+Ctr.

We recommend that if possible, we are contacted before a build to provide a design review and advice on how to meet quality standards.

Should the test fail, we can offer advice on how to improve the sound insulation. We have consulted on hundreds of building projects in the past, and have ensured all of them have met the building regulations. If a sound insulation test fails, we can give remindial advice to ensure the tests passes later.

We understand that most clients would prefer testing to take place as soon as possible. Once you get in touch we will schedule the test at the earliest available opportunity.

You can call us today to set up an appointment for sound insulation testing. Our scheduling is flexible so that you can get the service you need at your convenience.

Ideally, a test should be carried out as early as possible as problems are more difficult to fix the further along you are. Where possible, it’s recommended that testing is carried out before kitchens or bathrooms are installed. The minimum that we require to be able to carry out a test is:

  • All doors, windows and seals should be fully fitted and closable
  • All electrical fittings should be fitted and working
  • 240V mains power must be available on-site in all rooms
  • Gaps in walls and floors should be fully sealed
  • All walls and ceilings should be plastered
  • There should be no holes remaining in floors or ceilings
  • Testers will require access to all rooms on all levels

Pre-completion sound testing is a building regulation requirement for all purpose built & “formed by material change of use” (i.e. refurbished) properties since 2003. Sound testing is undertaken in a percentage of properties in each development to ensure that the separating walls & floors between habitable rooms of neighbouring properties meet the minimum requirements as defined by Approved Document E, commonly referred to as ADE.

From 2003, Approved Document E states that all new UK builds must undergo pre-completion sound insulation testing. New builds must achieve impact sound test results of no more than 62dB L’nTw and airborne sound loss of no less than 45dB DnTw+Ctr. Converted properties must achieve impact results of 64dB L’nTw or lower and airborne sound loss of no less than 43dB DnTw+Ctr. Approved Document E sets out details pertaining to the resistance to the passage of sound.

This Approved Document, as part of UK Building Regulations helps to ensure that newly built or converted houses and residencies, flats and residential spaces and other relevant buildings are constructed to minimum standards that provide ‘reasonable resistance to sound from other parts of the same building and from adjacent buildings.’ All of our tests are fully compliant with Approved Document E and our expert team have been carrying out compliant tests for many years, for thousands of satisfied customers throughout the UK.

We understand the sectors our clients work in. Our advice is not only technically robust but also practical and helpful to our client’s particular situation. At AF Acoustics, we always look at the bigger picture and work towards the ultimate development goal.

In order to provide you best solutions, we will listen to your needs, present you with robust solutions and deliver acoustic consultancy through our considerable experience. Our ever-expanding knowledge-base allows us to provide cost-effective and streamlined solutions.

Our consultants are very experienced and have a proven track record on both small scale projects and major projects. As we are a lean and small company, we have lower overheads and therefore offer exceptional value for money.

Airborne sound (or airborne noise) is sound that is transmitted through the air. Airborne Sound Insulation is the insulation against noise originating in air, e.g. voices, music, motor traffic, wind. The greater the airborne sound insulation between two rooms, the lower the resulting sound level in the receiving room.

This is unlike Impact Sound Insulation that protects against noise originating directly on a structure by blows or vibration e.g. footsteps above, furniture being moved, drilling and hammering the structure.

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Call us today for a quote on 020 3372 4430
Or you can email us at info@af-acoustics.com
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Adrian Finn

AF Acoustics lead Acoustic Engineer, Adrian is your first port of call for all sound insulation testing questions enquiries and surveys.

Working Hours

  • Monday 08:00 - 18:00
  • Tuesday 08:00 - 18:00
  • Wednesday 08:00 - 18:00
  • Thursday 08:00 - 18:00
  • Friday 08:00 - 18:00
  • Saturday Closed
  • Sunday Closed