This winter has been quite a wet season, bringing to light many roofing issues that have created leaks. Ponded water is one of the issues that can lead to damage if it is not properly taken care of.
What is ponded water?
The National Roofing Contractors Association (NRCA) defines ponded water as "water that remains on a roof surface longer than 48 hours after the termination of the most recent rain event.” Water that sits on your roof top for an extended amount of time can lead to blistering, delamination and peeling of the roof surface. This ultimately results in a leaking roof that is in need of repair.
What Causes Ponded Water?
Ponded water can occur on the rooftop either because of a poor slope design or drainage issues. Conducting a semi-annual roof maintenance inspection every six months helps ensures that your drains are not clogged or obstructed and they are working as expected. Roofs that have a bad slope causing rainwater to constantly pool together in a specific location will need to be fixed by a roofing professional.
Solving Ponded Water Issues
There are roof coating systems, such as the AcryShield SPF Roofing System which allows a roofing contractor to create a new custom slope directly on top of your existing roof, ensuring that the next time it rains, the water will lead to a drain. The spray polyurethane foam (SPF) used in these systems is applied heavier in areas to create an angle that draws the water towards the drain. The base coats used in the AcryShield SPF Roofing System also add additional ponded water protection as they are capable of retaining their waterproofing and superior adhesion capabilities after being submerged in water for an extended amount of time.
National Coatings has a full line of AcryShield roof coatings that provide excellent waterproofing, superior adhesion, and resistance to ponded water for almost any roofing substrate including: Asphalt, BUR, Mod Bit, TPO, PVC, EPDM, Hypalon®, Metal, SPF and Concrete roofing. If you would like more information on our base coats or roofing systems with ponded water resistance, download our FREE Product Brochure!