Requirements sub-frame
Wooden sub-frame
Timber stud walls and timber battens fixed to masonry walls should be constructed in accordance with BS 5268-2 : 2002 and preservative treated in accordance with BS 5268-5 : 1989 and BS 8417 : 2003. Studding and framing should be adequately supported by noggings to ensure rigidity. Where timber stud walls or battens are treated with cuprous preservatives, care must be taken to ensure that sufficient time is allowed for complete fixation of the preservative before the cladding is fixed.
Aluminium sub-frame
Aluminium rail supports should be constructed in accordance with BS 8118-1 : 1991 and
BS 8118-2 : 1991.
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