B 48
[Subsidiary]
Fireplaces to have chimneys and flues. L.N. 294/76.
Chimney stacks to be carried above roof. L.N. 294/76.
CAP. 123] Building (Construction) Regulations
[1985 Ed.
Provided that where the flue from that fireplace is back to back with another flue, such thickness shall be carried up to a height of not less than 300 mm above the level of the top of the fireplace opening.
(3) The jambs of every fireplace opening shall be not less than 225 mm wide on each side.
(4) The enclosure and breast of every fireplace opening shall be supported by a lintel of reinforced concrete or steel or an arch of brick or stone.
(5) Every fireplace shall be lined with refractory fire bricks or slabs not less than 50 mm thick set in fireclay.
75. (1) Every fireplace shall be provided with a chimney.
(2) Where solid fuel or oil is burnt every fireplace shall have its own flue.
(3) The flue in every such chimney shall---
(a) where used for a fireplace burning solid fuel or oil be not less than 200 mm across in any direction:
(b) where used for an open domestic gas fire or other gas fire appliance--
(i) be not less than 0.013 m2 in cross-sectional area: and
(ii) be encased in incombustible material not less than 25 mm thick exclusive of plastering:
Provided that voids may be left in such material enclosing the flue and not connected therewith.
(4) Every such chimney shall---
(a) be rendered or pargeted on the inside lined with fireclay, stoneware or other like incombustible material; and
(b) where used for a fireplace burning solid fuel or oil be made of solid bricks or building blocks, be properly bonded and solidly put together with cement mortar, or of plain or reinforced concrete, not less than 100 mm thick:
Provided that soot doors may be inserted in such chimneys.
76. (1) Every chimney stack shall be carried up above the level of the highest point of its intersection with the adjoining roof or gutter to a height of at least-
(a) 450 mm where used in connexion with a gas-fired appliance; or
(b) 900 mm where used in connexion with a fireplace burning solid fuel or oil.
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