Sanity check for Flat Roof pitch

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Hi all,

Simple one but just wanted to check..putting on a flat EPDM roof over 5m, is 9cm at the high end ok for the pitch ?

Thanks
 
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That's less than 50:1, 40:1 is the minimum according to building standards.

40:1 would be 12.5 cm.
 
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Hi all,

Simple one but just wanted to check..putting on a flat EPDM roof over 5m, is 9cm at the high end ok for the pitch ?

Thanks
Standard furring strips taper from 44mm down to 2mm or zero over 3.6m. Sounds like your pitch is ideal. The trick with any shallow fall is attention to detail. We line our furring strips up on the ground prior to fixing them, as they are rarely precise. They are arranged from the thickest to the shallowest and fixed accordingly. Make sure the insulation and any flying ends are adequately supported and in sympathy with the roof pitch.
 
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