Ponding Water On Flat Roof

Roofs should be constructed in such a way that all water drains within 48 hours of the rain stopping.

Ponding water on flat roof.

On a performing flat roof ponding water isn t a problem as it will just drain away. This can cause issues including. It may also void your warranty. 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. 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. 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.

And standing water on a flat roof is a common problem. Start from the beginning in extreme cases ponding may be a result of poorly installed or designed roofing. However when your flat roof has uneven areas an insufficient slope or drainage issues the water doesn t dissipate. This is because the flat roof can hinder drainage from rainwater which results in standing water 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. Ponding occurs when after a storm or heavy rain water collects in pools on the roof. Flat roofs by their very nature will collect some water when it rains. However excessive ponding threatens your roof.

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. 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. Common problems caused by flat roof ponding. The ponding or standing water can.

The water may seep into the roofing material and cause damage inside cause. 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. 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.