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recommended sub-floor detail:  lightweight clad homes

enclosing the sub-floor


There are alternative methods for enclosing timber sub-floors to improve the house energy rating for lightweight cladding systems.

You can do it simply by closing the gaps between timber base boards, or use fibre-cement sheeting instead, with a small gap between the sub-floor sheeting and the wall cladding.

Another method is to totally enclose the sub-floor and insert wall vents at the correct spacings.


Any method must meet the BCA requirement of 6000mm² per metre of external sub-floor wall.