Ponding Vs Puddling Water On Roof

Ponding water is known in the roofing community as water that stands in a puddle on the roof for more than 48 hours at a time.

Ponding vs puddling water on roof.

Ponding water can also create a number of other problems for buildings. However puddles 1 or more inches deep that linger for days can indicate a. After any rainfall lands on a flat roof water will begin to pool. The grp flat roof has standing water or is ponding water into one area.

On modern white roofs the water focuses the sunlight that passes through it like a prism and intensifies uv degradation. Ponding occurs when after a storm or heavy rain water collects in pools on the roof. While a puddle after a rainstorm is common if the water is still there two or three days later it could prematurely deteriorate your roofing system. How to fix water puddling on a flat roof.

And if it doesn t drain properly then your roofing materials become subject to the added stress of ponding water. Standing or ponding water is a regular occurrence with flat roofing in general but one that will not affect the performance of the grp roofing surface. Ponding water is typically a sign of a drainage problem that needs to be addressed because when left unaddressed ponding water on a roof can. Degrading the roofing material itself.

Even flat roofs contain a slight slope to maintain positive drainage. However when your flat roof has uneven areas due to sagging an insufficient slope or drainage issues the ponding water doesn t dissipate. Ponding water might not be an immediate threat but if it is allowed to persist over time that water can begin to wear on the roofing membrane. Most often water ponding is due to changes in the soil beneath the concrete slab.

After cycles of wet and dry or freezing and thawing the soil beneath the concrete may become unstable and develop pockets or holes. Every flat roof will collect some water during periods of heavy precipitation. Eventually the soil will not be able to support the concrete and the concrete will actually sink into the holes beneath it. Most pools of water will quickly drain off or even evaporate but owners should be aware of the signs that ponding has become an issue.

Act as a magnifying glass on the roof under the pond which increases the damaging ultraviolet exposure of that area of the. By their very nature flat roofs do not completely drain after it rains. Ponding water accelerates roof system aging by. If you have some water on your roof after a heavy rain for instance but the water is gone in a couple of days your roof is doing just fine.

Collect dirt which may cause the growth of vegetation or telegraph mud cracking to the roof below. This is a particular concern for older built up and modified roofs. Common problems caused by flat roof ponding.