Ponding water is one of the most common problems plaguing flat roofs, and it’s the main reason why you need to inspect your commercial roof after a storm. Today, the commercial roofing contractors at Vertex Roofing Contractors Inc. discuss what happens when ponding water on a flat roof is ignored.
How Does Ponding Water Form?
Ponding water occurs when rainwater doesn’t properly drain on a flat roof. This results in pools of water that stay for more than 24 hours. Flat roofs shouldn’t have ponding water. If properly designed, the roofing surface should have a slight grade that aids the drainage process. Anything that impedes the flow of rainwater on the roof should be addressed to prevent ponding water.
Installation errors aside, irregularities on the roofing surface can form after installation. If the building settles into its foundation or if the soil it’s standing on has shifted, this may cause a slight change in elevation on some parts of the roof and result in depressions on the roof surface. Sometimes the roof insulation may become wet or get compacted, which would result in the same. If you find such irregularities, even without water collecting, it’s best to call your commercial roofing contractor for roof repair.
The Effects of Ignoring Ponding Water
We recommend inspecting your flat roof within 24 hours after it rains. Mark the areas or take photos of any instances of ponding water and call your roofing contractor as soon as possible. Timely repairs can help prevent the following problems:
- Dirt Buildup — Dust and other airborne debris can collect on the water, encouraging moss and algae grow on the roof.
- UV Damage — Water can act as a magnifying glass, which focuses UV rays and increases damage on the part of the roof under it.
- Photo-Oxidation — Water can accelerate oxidation of components such as fasteners, flashing and coatings, which can result in premature degradation.
- Damage to the Seams — Ponding water may penetrate the seams on single-ply roofing by weakening its adhesives. If not addressed promptly, this could lead to water infiltration.
Vertex Roofing Contractors Inc. is your leading provider of commercial roof replacement and repair. Give us a call at (703) 794-2121 or fill out our contact form. We serve customers in Gainesville and nearby areas.