H1.1 This Part sets out the required standards for Regulations 19 to 21.
H1.2 The standards apply to a dwelling other than a wholly detached dwelling.
H1.3 The standards are for separating elements (walls and floors)
in a new dwelling, in a dwelling created by conversion, and in
a dwelling where the building warrant covers a change of use of an element
invoking a more onerous requirement e.g. in a rehabilitated flat where
an existing internal wall becomes a
separating wall.
H1.4 The term dwelling includes any part of a building, being a part intended for occupation as a separate dwelling, irrespective of the purpose group of the rest of the building. The elements separating such a dwelling from the rest of the building must comply. Roofs or walkways to which there is access for purposes other than for maintenance of the building, which lie directly above a dwelling, must also comply. Walls separating a dwelling from a common access corridor or stair, or waste chute, must also provide adequate sound insulation.
AIRBORNE SOUND
H2.1* A wall or floor separating a dwelling from any part of a building must provide adequate resistance to airborne sound.
IMPACT SOUND
H2.2* A floor separating a dwelling from any part of a building above the dwelling must provide adequate resistance to impact sound.
H2.3* A roof or walkway over a dwelling which is accessible for any purpose other than maintenance must provide adequate resistance to impact sound.