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Improving Acoustic Floor And Walls In Flats

By Author: Darren Helliwell
Total Articles: 1

Improving Acoustic Floor and Walls in Flats
There are many reasons why noise disputes between neighbours occur, it may be because you genuinely have noisy neighbours; however, this problem could be compounded due to the poor sound insulation on your dividing partitions. Many existing dwellings consist of office conversions into flats; unfortunately at the time of the building conversion, sound insulation was not given a high priority and so many of the dwellings suffer from adverse noise transference between the floor and wall partitions.
There are many ways to improve existing floor and wall partitions to help improve the sound insulation performance of your property and even achieve compliance with Building Regulations Part E.

Improving Existing Floor Partitions
In our experience - of undertaking thousands of sound tests), refurbishment projects usually achieve 30-35dB for airborne sound and 70dB for Impact Sound if no previous acoustic upgrades have been made to the existing construction. Unfortunately these figures fall far short of the required 43dB & 64dB as defined in Building Regulations Part E. As sound levels double approx. every 10dB, if you fail by 10dB the sound travelling into your property from your neighbouring property will be twice as loud and may lead to future complaints from both parties.

To reduce airborne and impact sound transmission this usually means adding density and isolation to the floor construction. This can be as simple as adding a drop ceiling consisting of 125mm timber frame. The top of the frame must be a minimum of 25mm below the existing ceiling finish - such as lathe and plaster. Then, to the inside of the timber frame add 100mm of Acoustic Wool and two layers of sound-board tacked to the bottom of the timber frame – all boards to be lapped. This should improve your sound test results by approx. 15dB depending on the existing site conditions and quality of the installation and subsequently lead to much more tolerable noise levels within your property.

Improving Existing Wall Partitions
In many cases the standard onsite construction for existing internal walls may be a mixture of 100mm masonry with render applied to either side; or, 100mm timber partition with lathe and plaster to either side. Unfortunately neither of these existing wall constructions will have the acoustic properties to pass Part E in their existing state due to lack of mass and poor isolation values. The use of an additional sacrificial wall lining can reduce such noise complaints as well as more minor upgrades such as installing silent closure mechanisms on kitchen cupboards and bedroom wardrobes. If sockets are installed back to back in separating walls may also lead to complaints about noise arising when plugs are inserted and switches are activated as the wall will be weakened in this area.

Our team of experienced sound test engineers are dedicated to giving our customers the best quality design advice to help clients achieve better sound insulation on their properties.
If you would like more information in regards our acoustic design service or sound testing service sound testing, please contact us at: info@aptsoundtesting.co.uk or call Darren Direct on 07775623464.

Alternately, If you would like more information on how to prepare for your sound testing please download our sound test checklist.

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