Simple question, what is the recommended fall for a flat roof?
(warm deck, with 3 layers of hot bonded felt on top of ply on top of celotex)
Flat Roof
May 01, 2004
1 Replies
IME about 20deg if you want to keep the water out for 20 years, but Chudley says 1:80 for continuous coverings or 1:60 if there are laps. Probably depends more on the size of pre-cut firings if using them.
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