Roofing Standing Water

Standing water weighs approximately 5 lbs.

Roofing standing water.

Standing water is typically defined as a collection of water on a roof which hasn t drained within 48 hours after rainfall. Over time however ponding water can lead to accelerated aging of the roof membrane. Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes. Per inch per square foot of roof surface.

When can it damage the roof. This is the greatest risk you take if you don. Roofing shingles and materials plus factory certified roofers including ratings from real homeowners from north america s largest roofing manufacturer. If your commercial building has a flat roof sometimes there is a problem with ponding water.

As old roofing surfaces wear out or curve it becomes harder for water to flow off of the roof. If this is the case there is a high chance that the ponding water will stay on the roof for a long period of time causing the collection of water to become bigger. However standing water that stays for more than two days can be very problematic for the roof membrane because it can void your roof s warranty. This is especially prevalent after a lot of rainstorms.

Occasional minor ponding on a roof doesn t really create problems that much. Standing water will create the need for roof maintenance because a roof leak repair will be the order of the day when ponding persists. The water will stick around on the roof thus adding weight and stress onto the surface. How much more when the type of roof that you have is a flat one.

Standing water develops when your roof s surface formulate small channels or canals where rain pools. Long term effects of ponding water on a flat roof. That can be extremely dangerous for your roof if too much water accumulates. Water sitting on a roof will be there for an extended period and find a way into your roofing system that is a given.

Ponding water isn t an immediate threat in fact roof membranes are made with the same material as pond liners so water penetration is unlikely. A standing water area of only 10 by 10 and 1 deep is 200 total square feet and an additional live roof weight of 1 000 pounds. This is because the flat roof can hinder drainage from rainwater which results in standing water on the roof. Check the gutters for any backup of debris that could prevent water from draining properly.