Putting a slope on a flat roof

bwithers · 4 Nov 2011

Hi,

I want to put a slope on a flat roof to ensure water flows from behind a roof light. Currently water pools behind a large roof light so I wanted to raise the level of the roof felt so it flows to the edges of the roof light and away.

I was thinking of mixing liquid rubber and sharp sand to make a trowable mix that I can create a slope from the middle to the outside of the window.

Any suggestions on what liquid rubber would suit this best?
What proportion of sand to rubber?
Do i need to do anything to the felt surface (other than dry and sweep) before the rubber/sand mix goes on?

Thanks,

Bryce

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Putting a slope on a flat roof

bwithers

DIYnot Local

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