UKAS Accredited Sound Insulation Testing
Sound insulation (or pre-completion) testing is one of the final steps in any project involving the assessment
of the sound insulation performance of party walls and party floors between different dwellings.
It is one of the requirements of Approved Document E of the Building Regulations for new and converted properties
as well as the Code for Sustainable Homes.
We can assist by providing an excellent turnaround time from the initial enquiry to the delivery of the final
certificates, ensuring the timely completion of a project.
Low cost After all, specialist services need to be approachable
Fast turnaround time. All enquiries will be dealt within one day. Our team will guide you through everything you
need to know for sound testing and provide you with a scope of work and fee proposal which will reflect your exact needs
Accredited testing Our report will be accepted by all Building Control Bodies throughout the UK
Indication of the results on-site. We would be able to provide an accurate indication of the sound insulation performance
during the sound tests
Free advice In case of a failed test, we will provide advice without any charges to ensure that the re-test will be
successful. Fees for the re-test will be reduced in order to ensure the swift completion of your project.
How much does sound testing cost?
We strongly believe in the moto "Less is more".
At KP Acoustics we have set a simple way of pricing our UKAS accredited sound
insulation testing. This is reflected on a small fixed fee which includes the
site visit, the sound
test report and the sound insulation certificates.
As the number of sound tests depends on the layout of the site and the
requirements of the local Building Control
Body, each airborne or impact sound test is charged individually at a
highly competitive rate. The overall quote will,
therefore, reflect exactly what you need to pass Building Control requirements while receiving efficient and
high-quality acoustic consultancy support throughout your project.
Sound Insulation Test - some facts.
The requirements for the sound insulation performance of separating (party) walls and floors for new-build and converted
developments stipulated by Approved Document E (2003 Edition) are shown in the table below:
|Airborne Sound Insulation (DnT,w + Ctr) Floors and walls
|Impact Sound Insulation (L’nT,W) Floors only
Please note that the above requirements are only applicable for party walls and floors between different dwellings
and not within the same property (internal walls or floors).
One set of tests needs to be undertaken for every ten flats or houses, provided the construction system is the same.
A set means that the test should include two locations where the party element (wall/floor) is tested. This is
equivalent to two individual tests when assessing the performance of a wall (airborne performance only) and four
individual tests when assessing a floor (two airborne and two impact tests). All tests must be undertaken between
habitable spaces (e.g. bedrooms, living rooms) and not to or from common spaces (stairwells, corridors).
Sound testing procedure (in simple terms)
For airborne tests, the first step is to generate high-level noise on one side of the party wall or floor. This
is a specific test signal called "white noise". An initial measurement is taken within the "source room" followed by
another measurement on the other side of the wall or floor under investigation, the "receiver room". The difference
in the two levels, corrected for some acoustic parameters measured on-site would give us an appreciation of the
airborne sound insulation performance of the wall, or floor. The higher the difference, the better the performance.
Impact tests for floors are slightly different. A special "tapping machine" is switched on within the source room
upstairs. This is a calibrated set of hammers which "tap" the floor by applying a known force on the floor structure.
The noise level is then measured in the room below and assessed accordingly in order to see how effective is that
specific floor to footfall noise. The lower the measured level, the better the performance.
Site readiness checklist
The following points would need to be answered before deciding whether a site is ready for sound testing.
- Is there power available in the test rooms (110V/240V)?
- Are doors, windows, cornices and skirting boards in place?
- Are test rooms unfurnished?
- Is there a carpet or timber laminates in place (only applicable for floor tests)?
- Are all wall, ceiling and floor surfaces complete?
- Is there access to both sides of the separating wall/floor?
- Will there be any construction activity or other type of noise during the sound insulation tests?