It's common for a commercial building to use a low-slope or flat roof because this kind of roof is cheaper to have installed and easier to have built than many other types of roofs. Residential buildings are now utilizing flat roofs too because they allow solar panels to be installed and allow for the easy placement of HVAC components. Even with these benefits, flat roofs are prone to a problem with pooling water. It runs the risk of ruining the roofing material due to the growth of mildew and mold. While flat roofs have a slight slope to them to allow pooling water to drain, this problem can still happen. Here is what you need to know about pooling water.
Why You Should Be Concerned About Pooling Water
There is more to pooling water than just damage to the roof's surface. Pooling water also increases the weight of the roof. When there is too much pooling water, the roof will take on more weight than it was intended to. This could eventually lead to the roof failing. For instance, a 400 square-foot section of roof with an inch of water pooling on it can add an additional ton of weight to the roof.
Pooling water will also freeze during the winter, causing the temperature of the roof to fluctuate greatly. This will eventually lead to the roofing material becoming brittle and cracking. Leaking will then occur due to a damaged roof membrane.
The nature of the roof being flat also allows for debris to easily clog the drains going to the downspouts, and this will cause problems with pooling water. This requires you to keep an eye on clogged drains more so than in the case of a sloped roof.
How You Can Eliminate Pooling Water
When pooling water is a problem, you'll need to address it with the help of a professional roofer in your area. The process starts by inspecting the underlying roofing material for damage. If you have damage, there is no sense in making any changes to prevent pooling water yet.
The roofer will then correct the problem that was causing the pooling. This could include adding sloping material to the roof in areas where water would frequently pool. The same thing can be done by applying metal flashing around the opening to help create slopes around them. A solar-powered roof pump may need to be installed, but only as a backup and not as a solution to correct a problem with water pooling.
For more info on how water pooling can be eliminated on a flat roof, ask a local roofing contractor.Share