The measurement of the sound reduced by partitions in a development, such as a wall or floor, is known as sound insulation testing or sound testing. It assesses how good the soundproofing materials fixed to the property development are. New structures and reconstructed developments have been mandated by the Building Regulations to test for sound upon completion, since Approved Document E (ADE) was reappraised 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. We understand how important it is for you to get a sound insulation certificate. That’s why we go the extra mile to make sure you get your certificate as quickly as possible. In fact, we pride ourselves on issuing our sound insulation testing certificates as quickly as possible.

Our highly qualified site engineers can arrive on site when needed. They will provide verbal results after the test and a written report will be sent to you within 24 working hours.

Our Guarantee

  • Over 15 years experience
  • State of the art equiptment
  • Onsite Support
  • Next Day Report Turn Around
Call us today for an assessment on 020 3372 4430
Or you can email us at info@af-acoustics.com

What is a Sound Test?

Developments must test all walls, floors and ceilings that separate buildings or neighbours in a dwelling, to conform to Approved Document E (ADE) of the Building Regulations. You may not have to test your building if you used Robust Details which were approved before their installation. Sound testing measures the impact and airborne sound moving through new and old adjoining buildings. This tests include the boundary walls between buildings and in-between the spaces in a development.

What is involved in a Sound Test

While producing lots of noise, sound test needs a quiet site to be conducted efficiently. Due to this fact, the workers in the site should not be present at the time of the test. A sound insulation test on a project is taken according to the scale and complexity of the construction and the conditions of the site. Most of the time the test will be conducted in 90 minutes, for a simple, regular sized construction.

The sound testing engineers then proceed to give verbal results on the site and offer helpful advice on any problem areas noticed during the duration of the test.

You will get a detailed written report and sound test certificate about a day after, if possible. Every 10 units in a group or sub-group are to be tested, according to ADE. A sub-group is stipulated in Section 1. Of ADE ADE goes on to define and group the type of structures that will undergo testing. They are houses, flats and rooms that are being used or are planned to be used as residences; such as student accommodation, care homes and hotel rooms. The volume of testing carried out on each group is written below.

Why is Sound Insulation Testing Relevant?

Document E of Building regulations, from 2003, made it compulsory for all new UK constructions to undertake a pre-completion sound test. 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. The aim of Approved Documet E of the Building Regulations is to establish a minimum standard for the reduction in noise levels between all dwellings in a new or refurbished building. Sound testing is essential due to the fact that sound impacts us wherever we are, whether it’s at home, leisure or the office. Reduced noise in the partitions and flooring of a structure leads to greater ease and a more efficient environment.

Insufficient sound insulation causes distress and comfort while an effective sound insulation system brings about speech privacy. This is one of the several reasons why sound insulation is a key element in building. 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. Then there are developments where each neighbouring room / flat / unit has mixed uses. If the development has passed the sound insulation test, noise is reduced to a minimum.

Does Your Development Need a Sound Insulation Test?

Your development needs a sound insulation test if it meets one of the following criteria:

  • It’s design does not have Robust Details
  • It’s a new building with 2 or more dwellings
  • It’s being constructed to be used as a residence, like a hotel room or a hostel, or as a nursing home
  • It was once a single dwelling but is being turned into a development with several flats or units.

ADE thoroughly explains sound testing and makes it compulsory.

To conform, you can either follow the procedure outlined in ADE or make use of Robust Details. If you choose the latter, you must use Robust Details which are a approved design details for partitioning walls and floors. 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. With sound testing, however, you’re free to pick from any design, including more cost effective and appropriate ones. This makes it a more efficient process than Robust Details. Conducting on-site pre-completion sound testing also enables the architects more scope with their design and can lead to improved sound insulation performance.

How Much Will I Pay for a Sound Insulation Test?

Simply contact us and we will be able to provide a free, no obligation quotation as to the requirements and costs for your development. Not only are we highly experienced in providing sound testing services in UK, our reports and certificates get to the client within one of the fastest turnaround time and our prices are competitive. Send us a price you got that’s better than our and we will try to beat it.

Sound Insulation Test Time

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. During the test, you should provide the following:

  • Access to all rooms. The only exception is if a schedule was created before the test time.
  • 240V power supply
  • A noiseless site

How a Sound Test is Done

The procedures of a sound insulation test are not difficult. Our site engineers can help you understand it better during the testing time. Airborne tests are conducted on party walls while impact and airborne tests are conducted on party floors.

The airborne sound insulation test is carried out with a large speaker or dodecahedron speaker, using a white or pink noise generator to create the source sound, almost always in the largest room of the two rooms under testing. A sound level meter calculates the noise in the source room and receiver room. 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. When conducting airborne sound insulation tests, two speakers are placed in each source room. The noise level in the receiving room is measured to get the sound difference between the source and receiving room.

Finally, the difference in noise level is modified to accommodate reverberation time and background noise that was already in the receiver room. Reverberation time is how long it takes sound to decay by 60dB. Impact tests are conducted by fixing a tapping machine on the floor. The noise level is then recorded in the room below. This is used in calculating and computing the results. These results are checked against Building Regulations ADE conditions for that kind of dwelling. Without the mathematical formulae, this explanation highlights sound insulation testing procedures in a simple manner.

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

Sound Test Equipment Used

The testing equipment used are UKAS calibrated. Our highly qualified engineers test based on present Building Regulations conditions. An airborne sound test measures levels of sound transmitted through the air through a separating element. We use a loudspeaker and noise generator that produces white or pink noise on one side of the partition, and measure with a sound level meter on both sides to calculate the sound insulation performance of the partition. We use a tapping machine, which drops metal hammers onto the floor to create impact noise. We then measure the amount of sound that passes through the partition with a sound level meter in the room under the tapping machine. Sound insulation tests are conducted in liveable rooms like the sitting room, lounges, kitchen/living spaces and bedrooms. Test results, which are approved by Building Control and used to sign off the building, are recorded in a report and sent to the client.

It’s important to undertake a sound test if you have this kind of building:

For sound testing we usually undertake impact and airborne sound test on buildings. This affects the separating floors and walls between habitable rooms of buildings and developments.

Two or more new build dwellings or flats

This makes sure that the sound insulation for the building meets all the necessary requirements.

Conversions of former single dwelling properties into flats

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

Using designs where Robust Details are not included

Architects are able to use pre-tested and approved Robust Details design for partitioning walls and floors. The Robust Details scheme was formed in 2004 by Robust Details Ltd. If the building design is slightly different from Robust Details, a sound test is essential so that Building Regulations criteria can be met. A building built as a permanent dwelling has different minimum standards from a building with rooms built for residential purpose, like a hotel or a hostel.

Areas in the UK AF Acoustics Conduct Test

AF Acoustics provides acoustic design services to customer nationwide, especially in South-Lambeth. Our clients include architects, planning and environmental consultancies. We also work with government agencies and private individuals. We’re based in several areas across the south east region of UK so that we can give you the most cost effective quote in the industry.

Why you should pick AF Acoustics for your sound testing

We have worked with many organisations and individuals in South-Lambeth. Our clients have endorsed us for the following reasons:

We’ve been conducting sound tests for more than 15 years

We understand the industries our clients are in. Therefore, we provide advice that is technically adequate, useful and applicable. By doing this, we have been able to continuously satisfy clients in the UK and meet their acoustic needs for over 15 years, providing great value for money.

Competitive prices

To ensure all clients in South-Lambeth can afford superior quality sound insulation testing, we offer some of the most competitive rates you can both in and outside South-Lambeth. If in doubt, contact us now for a free no-obligation quote.

Consultancy that is effective and efficient

Our expert acoustic advice is tailored to your specific needs based on our experience which enable us to provide strong solutions. When you reach out to us for professional advice, we make certain that we render accurate solutions rapidly. We suggest productive answers that handle your present and long-term desires to the maximum.

Adaptable test dates

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 South-Lambeth by calling us now.

Get your test reports quickly

When you get your sound test report fast, you’re able to take corrective action. We try to issue reports on the next working day no matter how large or complex the project. That way, you can take immediate action on the recommendations given. Our reports are thorough and cover all the important issues.

Sound insulation 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. To find out more about we can help you with your acoustics needs, call or email us right away.

Impact and Airborne floor test

These are only carried out on separating floor/ceiling between dwellings. The measurement of the extent of noise transmitted directly through impact from one adjoining room to another is known as impact testing. These floors in habitable rooms of flats undergo both impact and airborne tests.

Approved Document E test

Our sound insulation testing in accordance with Building Regulations Approved Document E, which sets out details pertaining to the resistance to the passage of sound. The impact sound test of new dwellings should be 62dB L’nTw or less and airborne sound insulation 45dB DnTw+Ctr or more while impact results for reconstructed properties should be 64dB L’nTw and airborne sound insulation 43dB DnTw+Ctr or more.

Sound testing

We want to give our customers the most highest chance to acquire a pass and via our offer skilled services. To make sure a new residence meets with the standards of greater than 45dB DnTw+Ctr and less than 62dB L’nTw, an airborne wall test and an airborne and impact floor test will need to be conducted. 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 an assessment on 020 3372 4430
Or you can email us at info@af-acoustics.com

Acoustic design testing in schools in line with BB93

For a school to meet up with Building Regulation acoustic requirements, it must adhere to Building Bulletin 93 (BB93) which explains the sound insulation expectation for schools in detail. If you’re constructing a new school in South-Lambeth, we can conduct a test to be certain it meets the standards of BB93.

Acoustic layout

AF Acoustics provide extensive design services and consultancy on a variety of buildings. We have the ability and experience to create bespoke solutions, and have solid working information of accessible acoustic items. We will create design solutions appropriate for the explicit requests of the construction.

It is critical to get right professional assistance ahead of schedule from a highly qualified acoustic specialist. AF Acoustics can assist you with identifying the right acoustic propertiesfor your project at very early on in the construction process and tell you the best way to get them, utilizing a deep know-how of acoustic design.

We will help you with:

Acoustic detail design for architects engaged with residential improvements in consistence with Part E Building Regulations, BS8233 and so on. Detail plans in commercial, educational and healthcare project for adhering to the prescribed standard. Designs and specifications that ensure good sound performance of buildings in residential areas and other noise sensitive places. Improving sound and public address system in halls, conference rooms etc.

Contact AF Acoustics specialist for sound insulation test quotes

We are an independent acoustic organisation that handles everything concerning acoustics including survey, design, architectural and building acoustics and air tightness testing. We will give you sound advice and guidance no matter who you are or the kind of project you have. To get an accurate quotation, either call us or email info@af-acoustics.com

020 3372 4430 Contact us

Please send the following information to us

Give us the following information when contacting us

Place where the building is being built

Where is your development situated in South-Lambeth

How many dwellings are there?

Number of dwellings on the property

Total number of floors

To get a precise quote, let us know the total number of floors you have.

Dwellings configuration per floor

To get an appropriate quotation and determine the kind of tests to be conducted, we will also need this.

Types of construction

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

New construction or refurbished building

The testing requirement for new builds and conversion projects are different. We will need this information to determine what standard the testing ought to follow. With this information, we can easily provide you with an accurate and competitive quote on your project in little time.

Sound testing regulations

Our sound insulation tests are conducted in accordance with Part E Building Regulations in England and Wales and Section 5 of the Scottish Building requirements. You can also get credits for Code for Sustainable Homes and EcoHomes environmental assessment projects.

Sound resistance and performance: Document E 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.

Standard division for structures (Scotland)

Section 5.1 of the Scottish Building Standards explicitly describes expected energy performance of dwellings. It states, “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.” Tests, which are conducted after building utilizing the methodology given in annex 5.C. of the Scottish Standard 5.1 does not apply to: completely disconnected houses, rooftops and walkways with access exclusively for the use of the occupants of the home underneath.

Passing a sound insulation 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. We can study design reports, complete site visits and sound test the development to provide you with the level of assessment and consultation that your project requires from start to finish. The following will give you a better chance of passing the sound test: Inner and outer doors and windows have been installed and can be used Skirting boards are fitted Light fittings and switches and plug sockets are fitted and working. Our accomplished acoustic consultants work with developers, planners, contractors, and architects of all sizes from the early stages of the building plan to help limit any potential sound insulation performance problems to the completion of the construction, guaranteeing that all properties meet the criteria of Building Regulations Document E 2003.

Investigation and report certificates

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.

The way the results look

A sound insulation certificate will be issued whether the Sound Testing results and report indicate compliance with Part E of the Building Regulations or not. In the event that some part of the building does not meet up with the conditions of Document E, remedial work and a retest is required. We give remedial design advice to help you achieve Building Regulations standards.


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 an assessment 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