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Flat roof composites with a in built 1:75 fall /slope


Hi All,

For my projects it is necessary for flat roof build ups to have a sloped element above the timber roof deck to ferry the surface water to a trough gutter. Currently I create this by having two roof composites that together make the full flat roof build-up, the first being a totally flat timber deck with OSB and plasterboard the otherside, the second being the 1 degree sloped firring, insulation and EPDM finish.

I wondered if there was a way to create a roof composite to incorporate part of the element being on a sloped angle such that this could be one composite?

This would be useful to me because this would make flat roof skylights look cleaner as I will not need to create a second opening.