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Flexible roof render

I have a garage and store area with a flat roof. The roof is constructed on Beam and Block, with a render then a layer of flexible asphalt.
When originally built, there was insufficient slope created to allow for drainage, and whilst the asphalt cover is undamaged and the building essentially watertight, water pools on the roof.
I need to create a slope for drainage and wonder what sort of flexible render I can put over the asphalt to provide this whilst retaining a flexible and watertight roof.
Images of the site can be provided.
I am trying to avoid the cost of having additional layers of asphalt laid.
Any ideas guys?

Steve

Ygrowssb 8th May, 2012 Roofing
1 Answer
A

Save your money and effort - unless the roof is leaking or the ponding was causing other issues.
Although not ideal the water can have a positive effect on asphalt and other types of flat roof in that it keeps the roof cooler and prevents the oils from "burning out"
Water will eventually find the lowest point and as long as the pooling is'nt effecting any other areas I'd leave it.

SBS Ltd 23rd May, 2012
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