Approved Document E Building Regulations

Approved Document E sets minimum standards for the sound insulation that separating walls and party floors offer between dwellings.

These standards aim to reduce the issues and complaints relating to noise nuisance created by unwanted noise transfer and  apply equally to both new homes and conversions/change of use.

These regulations which cover both England and Wales are split into three sections:

      • Section E1 looks at protection from noise from adjoining buildings such as flats, semi-detached and terraced properties.
      • Section E2 looks at sound transmission within the home itself.
      • Section E3 provides protection against reverberation within the common communal areas within buildings containing multiple flats or rooms used for residential purposes.

The regulations also divide sound into two categories, airborne sound and impact sound

The minimum levels required are for :-

a) New build

      • 45 dB (DnTw+Ctr) airborne sound insulation (or higher) – This applies to both party floors and dividing walls between homes
      • 62 dB (LnTw) impact sound insulation (or lower) – This applies to party floors only

b) Conversion/change of use

      • 43 dB (DnTw+Ctr) airborne sound insulation (or higher) – Again applying to party floors and walls in conversions
      • 64 dB (LnTw) impact sound insulation (or lower) – This again applies to party floors only.

It is worth stating that the above are the minimum standards required however all the products and systems offered by BOSS Acoustics have been developed to exceed these levels to achieve a greater level of comfort within the living space.

Internal airborne sound insulation for walls and ceilings/floors within a single dwelling must be a minimum of 40 dB (Rw), the exception to this would be any wall that has a door in it.

The floor/ceilings and walls within a new detached home are only required to meet the 40 dB (Rw) airborne performance levels.

BOSS Acoustics are only too happy to offer solutions that exceed this minimum standard, as we have found that customers want to reduce their own noise nuisance levels particularly with more people now working from home which has increased awareness of domestic noise levels due to the greater amount of time now being spent in the home.