Ponding Water On 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.

Ponding water on flat roof.

After any rainfall lands on a flat roof water will begin to pool. The water may seep into the roofing material and cause damage inside cause. However excessive ponding threatens your roof. Puddles or ponding water is water from rainstorms and snow melts that collects on a flat roof and doesn t drain or evaporate after 48 hours.

No matter the reason for the ponding a professional roofing contractor will be able to help you fix the problem. Why should you be concerned about ponding water. However when your flat roof has uneven areas due to sagging an insufficient slope or drainage issues the ponding water doesn t dissipate. 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.

When can it damage the roof. Flat roofs by their very nature will collect some water when it rains. So if your flat roof is collecting water that doesn t drain or evaporate within 48 hours you will need to fix it. Dry the puddled water with old rags or towels and allow the roof exterior to completely air dry.

Ponding occurs when after a storm or heavy rain water collects in pools on the roof. If your commercial building has a flat roof sometimes there is a problem with ponding water. 3 use the utility knife to cut a 12 inch diameter circular patch out of the rolled asphalt roofing. Ponding can wreak havoc on your roof if you ignore 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. On a performing flat roof ponding water is not a problem as it will drain or even evaporate away. This is because the flat roof can hinder drainage from rainwater which results in standing water on the roof. 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.

Roofs should be constructed in such a way that all water drains within 48 hours of the rain stopping. 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. It may also void your warranty. Your flat roof might also have drains which have become blocked by debris meaning that the water has no choice but to accumulate on the roof.

Ponding is the phenomenon of water pooling on flat roofs after storms snow melts or heavy rains.