Balconies

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In buildings that include a ‘residential’ purpose (purpose groups 1 and 2) with a storey 11m or more in height (see Diagram D6 in Appendix D) balconies should meet either of the following conditions.
a. Only contain materials achieving class A1 or A2-s1, d0, except for any of the following.
i. Cavity trays when used between two leaves of masonry.
ii. Intumescent and fire-stopping materials where the inclusion of the materials is necessary to meet the requirements of Part B of Schedule 1 to the Building Regulations 2010.
iii. Membranes.
iv. Seals, gaskets, fixings, sealants and backer rods.
v. Thermal break materials where the inclusion of the materials is necessary to meet the thermal bridging requirements of Part L of Schedule 1 to the Building Regulations 2010.
vi. Any material achieving class A1fl or A2fl-s1 when it forms the top horizontal floor layer of a balcony and is provided with an imperforate substrate under it which extends to the full size of the class A1fl or A2fl-s1 material.
vii. Electrical installations.
viii. Fibre optic cables.
b. Achieve both of the following conditions.
Have an imperforate soffit which extends to the full area of the balcony, achieves a minimum REI 30 rating and is constructed of materials achieving class A2-s1, d0 or better.
ii. Materials achieving class B-s1, d0 or worse extending beyond the boundary of a single
compartment should include a band of material rated class A2-s1, d0 or better, a minimum of 300mm in width centred on that boundary line.
Where regulation 7(2) applies, that regulation prevails over all the provisions in this paragraph.