Common problems caused by flat roof ponding.
Ponding vs puddling water on roof.
On a performing flat roof ponding water is not a problem as it will drain or even evaporate away.
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.
Degrading the roofing material itself.
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.
By their very nature flat roofs do not completely drain after it rains.
After any rainfall lands on a flat roof water will begin to pool.
Does your roof have issues with ponding water.
The grp flat roof has standing water or is ponding water into one area.
Every flat roof will collect some water during periods of heavy precipitation.
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.
On modern white roofs the water focuses the sunlight that passes through it like a prism and intensifies uv degradation.
Eventually the soil will not be able to support the concrete and the concrete will actually sink into the holes beneath it.
Ponding occurs when after a storm or heavy rain water collects in pools on the roof.
Ponding water accelerates roof system aging by.
Act as a magnifying glass on the roof under the pond which increases the damaging ultraviolet exposure of that area of the.
How to fix water puddling on a flat roof.
Roof systems are simply not designed to hold water.
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.
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.
Collect dirt which may cause the growth of vegetation or telegraph mud cracking to the roof below.
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.
However when your flat roof has uneven areas due to sagging an insufficient slope or drainage issues the ponding water doesn t dissipate.
However puddles 1 or more inches deep that linger for days can indicate a.
And if it doesn t drain properly then your roofing materials become subject to the added stress of ponding water.
Even flat roofs contain a slight slope to maintain positive drainage.
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.
