REGULATIONS

Building Regulations – Part E – Resistance to the Passage of Sound

Building Regulations – Part E is comprised of four sections; E1, E2, E3 and E4, summarised below.

The official government document can be viewed, in full, via the following link: Approved Document E

 

E1 – Protection against sound from other parts of the building and adjoining buildings

E1 applies to residential buildings, including flats and apartments, semi detached and terraced housing, hotels, hostels, nursing homes and student accommodation. E1 compliance is achieved by constructing internal separating walls and floors/ceilings to the standards outlined in table 1a, below. These standards relate to airborne and impact sound.

Table 1a
Dwelling-houses and flats – performance standards for separating walls, separating floors and stairs that have a separating function. Airborne sound insulation DnTw + Ctr dB (Minimum values) Impact Sound Insulation LnTw dB (Maximum Values)
Purpose built dwelling-houses & flats Walls 45
Floors and Stairs 45 62
Dwelling-houses & flats formed by material change of use Walls 43
Floors and Stairs 43 64

 

E2 – Protection against sound within a dwelling house

E2 applies to the internal walls of a dwelling house between bedrooms and between a bedroom and a water closet, as well as internal floors. E2 does not apply where the internal wall contains a door or where the water closet is part of an en-suite bathroom. E2 compliance is achieved by constructing internal separating walls and floors/ceilings to the standards outlined in table 1b, below. These standards relate to airborne and impact sound.

Table 1b
Rooms for residential purposes – performance standards for separating walls, separating floors and stairs that have a separating function. Airborne sound insulation DnTw + Ctr (Minimum values) Impact Sound Insulation LnTw (Maximum Values)
Purpose built rooms for residential purposes Walls 43
Floors and Stairs 45 62
Rooms for residential purposes formed by material change of use. Walls 43
Floors and Stairs 43 64

 

E3 – Reverberation in common internal parts of a residential building

E3 applies to common areas, such as stairways, corridors and entrance halls within buildings containing flats and apartments and including hotels, hostels, nursing homes and student accommodation. It stipulates that these spaces must have adequate prevention of reverberation. (Reverberation is the persistence of sound in a particular space after the original sound is removed).

 

E4 – Acoustic Conditions in Schools

E4 applies to rooms and spaces within schools. It stipulates that these spaces must be designed so that they provide adequate protection against noise disturbance appropriate to their intended use.