1985 Ed.]
Building (Construction) Regulations
[CAP. 123
B 47
72. (1) Every wall built of bricks or building blocks shall be constructed with a damp-proof course complying with regulation 23.
(2) Such damp-proof courses shall be constructed--
(a) horizontally through the wall at a height of not less than 150 mm above the highest finished level of the external ground or paving or the surface of any oversite concrete on either side of the wall;
(b) horizontally under the coping of a parapet wall;
(c) vertically on the outer face of a wall where the ground surface on the outside of the wall is higher than any floor of the building, together with a horizontal damp-proof course under the floor:
Provided that such damp-proof course may be omitted where the floor and wall are constructed of properly water-proofed reinforced concrete of not less than 200 mm in thickness:
(d) horizontally through the whole area of the brickwork of a chimney above the roof and be connected to the apron flashing.
[Subsidiary]
Damp-proof courses.
L.N. 294/76.
PART VII
FIREPLACES, FLUES AND CHIMNEYS
73. (1) Where any fireplace or stove is built or placed on any floor which is constructed of combustible material it shall be provided with a hearth of concrete, stone or other like incombustible material, level with the floor, under and before the fireplace or stove.
(2) Such hearth shall--
(a) be solid for a thickness of not less than 150 mm in every part:
(b) extend not less than 150 mm beyond each side of the fireplace or stove opening;
(c) extend not less than 450 mm in front of the fireplace or stove opening;
(d) if of concrete, be reinforced with not less than 300 mm2 of reinforcement per metre width in each direction; and
(e) be adequately supported.
74. (1) Any wall of bricks or building blocks at the back of a fireplace shall be not less than 100 mm thick and in the case of an external or party wall it shall be not less than 225 mm thick.
(2) Such minimum thickness shall be carried up from the level of the hearth to the level of the ceiling of the room in which the fireplace is situated:
Fireplaces and stoves to have hearths.
L.N. 394/76
Fireplace openings. L.N. 294/76.