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The Building Regulations (Northern Ireland) 2012
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- Northern Ireland Statutory Rules
- 2012 No. 192
- PART B
- Regulation 23
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Fitness of materials and workmanshipN.I.
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[F123.—(1) In any relevant work—
(a)the materials used shall—
(i)be of a suitable nature and quality in relation to the purposes for and the conditions in which they are used;
(ii)be adequately mixed and prepared;
(iii)be applied, used or fixed so as adequately to perform the functions for which they are designed; and
(iv)not continue to emit any harmful substance longer than is reasonable in the circumstances; and
(b)the standards of materials and workmanship need be no more than are necessary to—
(i)secure the health, safety, welfare and convenience of persons in or about the building; and
(ii)further the conservation of fuel and power.
(2) Subject to paragraph (3), building work shall be carried out so that materials which become part of an external wall, or specified attachment, of a relevant building are of European Classification A2-s1, d0 or Class A1, classified in accordance with BS EN 13501-1:2018.
(3) Paragraph (2) does not apply to—
(a)cavity trays when used between two leaves of masonry;
(b)any part of a roof (other than any part of a roof which falls within paragraph (d) of the definition of ‘External wall’ in regulation 22), if that part is connected to an external wall;
(c)door frames and doors;
(d)electrical installations;
(e)insulation and water proofing materials used below ground level;
(f)intumescent and fire stopping materials where the inclusion of the materials is necessary to meet the requirements of Part E;
(g)membranes;
(h)seals, gaskets, fixings, sealants and backer rods;
(i)thermal break materials where the inclusion of the materials is necessary to meet thermal bridging requirements of Part F; or
(j)window frames and glass.
(4) In this regulation—
(a)a “relevant building” means a building with a storey (not including roof-top plant areas or any storey consisting exclusively of plant rooms) at least 18 m above ground level and which—
(i)contains one or more dwellings;
(ii)contains an institution; or
(iii)contains a room for residential purposes (excluding any room in a hostel, hotel or boarding house); and
(b)“above ground level”, in relation to a storey, means above ground level when measured from the lowest ground level adjoining the outside of a building to the top of the floor surface of the storey.]
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