However excessive ponding threatens your roof.
Ponding water on flat roof.
Ponding occurs when after a storm or heavy rain water collects in pools on the roof.
So if your flat roof is collecting water that doesn t drain or evaporate within 48 hours you will need to fix it.
On a performing flat roof ponding water isn t a problem as it will just drain away.
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 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.
Ponding is the phenomenon of water pooling on flat roofs after storms snow melts or heavy rains.
However when your flat roof has uneven areas an insufficient slope or drainage issues the water doesn t dissipate.
Flat roofs by their very nature will collect some water when it rains.
Pools should drain away without causing any damage to the structure but owners and managers should know when to take action how to identify the cause of the ponding and how to resolve it.
This is especially prevalent after a lot of rainstorms.
If your commercial building has a flat roof sometimes there is a problem with ponding water.
What can you do about ponding water on your flat roof.
This is because the flat roof can hinder drainage from rainwater which results in standing water on the roof.
Start from the beginning in extreme cases ponding may be a result of poorly installed or designed roofing.
Common problems caused by flat roof ponding.
Roofs should be constructed in such a way that all water drains within 48 hours of the rain stopping.
Reduce the longevity of the roof increase exposure of the ponding area to damaging ultraviolet rays collect dirt lead to faster deterioration of the roof s coatings and materials encourage growth of vegetation such as moss algae and plants lead to a leaking.
Ponding on a flat roof refers to when water collects and creates small pools or ponds while most of these small pools eventually drain off or even evaporate over a few hours it can become problematic when pooling water stands on top of a roof for 2 days or more.
The water may seep into the roofing material and cause damage inside cause.
Degrading roofing materials particularly on older modified and built up roofs extra stress and damage to the load bearing structure due to the extra weight of the water in winter freezing standing water will expand causing more damage where seams overlap.
And standing water on a flat roof is a common problem.
This can cause issues including.
The ponding or standing water can.
