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Many commercial buildings feature flat roofs, which are perfect for large structures covering thousands of square feet. While they don’t provide the natural water drainage of traditional pitched roofs, flat commercial roofing systems are capable of dispelling rainwater, as long as they’re designed well. Knowing how flat roofs work and how to spot signs of trouble can prevent serious water damage and expensive roof repairs later.

How Do Flat Roofs Drain Water?

The Roof Is Not Actually Flat

Commercial roofing systems may look flat and even seem level when you walk on them. However, they usually have a slight slope, either from the center or gradually across the length of the building. While the grade might be almost imperceptible, it’s enough to keep water from pooling and guide it toward interior drains or the edge of the building and into the gutters.

Gutters Control the Water Flow

commercial roofingWater running off the edge of the roof falls into a gutter system, which guides it toward the drains. On many commercial roofs, gutters allow water to pass through while stopping leaves, branches, and other debris.

Signs of Roof Drainage Problems

You should never see standing water on your roof, even after a serious storm. If you find puddles on your roof, there may be a problem with the slope of the building, or the surface may have been damaged, which could eventually cause a leak. Water pooling around the foundation of the building may indicate damaged gutters or other drainage problems that can impact the integrity of the structure.

 

As one of the Triad area’s most trusted commercial roofing contractors, ChemTech Roof & Insulation Systems Inc offers the most advanced materials on the market and expertise you can trust. For over 35 years, they’ve delivered award-winning service on a wide range of projects, from large-scale construction to emergency repairs. Visit their website to see some samples of their work, connect with the commercial roofing pros on Twitter, or call (336) 767-4500 to discuss your project and learn about tax incentives you can take advantage of.

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