In the roofing industry there are few roof types as challenging as the flat roof. Leak prevention on a sloped roof is is simple, all the work is done by gravity. However that cannot be said about a flat roof. A flat roof has a higher chance for water to pool up instead of draining to the ground. Flat roofs are a good building design, you just need to make sure the roof is constructed properly. If the roof isn’t properly constructed then the pooled water can seep into the small gaps between the roofing materials. When this happens the pools will begin to increase in size eventually causing the roof to sag, once this happens the sagging roof will begin to become unstable and in turn unsafe. If you would like more info on different roofing options or are.