Ponding On Flat Roof

Flat roofs by their very nature will collect some water when it rains.

Ponding on flat roof.

However excessive ponding threatens your roof. It may also void your warranty. However this isn t the case for all flat roofs. This is because flat roofs do not drain water as effectively as their pitched counterparts.

If this water sits on the roof for more than 48 hours after the rain has stopped it can cause considerable damage to whatever roof surface you have. How to stop ponding from happening fixing low spots on flat roofs. This is especially prevalent after a lot of rainstorms. Dry the puddled water with old rags or towels and allow the roof exterior to completely air dry.

A sagging roof deck. Air conditioning units skylights or vents placed around the flat roof may stop the intended flow of water and cause pooling or ponding in their vicinity. Opening or unclogging existing drains. Ponding can occur on flat and low slope roofs that are installed using tarpaper roofing tar and fine gravel or a similar built up system.

One of the biggest problems with large flat roofs is that they tend to pond water in certain areas. Because these roofs don t drain water that well they are prone to developing what is known as ponding water. Flat roofs have subtle slopes to facilitate drainage. So if your flat roof is collecting water that doesn t drain or evaporate within 48 hours you will need to fix it.

It will actually destroy just about every roof coating there is even ours. The easiest way to prevent water ponding is to clean the drains rain gutters. Ponding is caused by a range of factors including. Ponding problems for flat roofs.

Install additional drains. 3 use the utility knife to cut a 12 inch diameter circular patch out of the rolled asphalt roofing. This is known as ponding and it can bring a range of potential problems. This is because the flat roof can hinder drainage from rainwater which results in standing water on the roof.

Low spots in the roofing allow water to pond which can. If there are low spots on the. Long term effects of ponding water on a flat roof if your commercial building has a flat roof sometimes there is a problem with ponding water. Common problems caused by flat roof ponding.

Those pitched roofs have a natural slope where the water can run down draining off the roof. Having a flat roof can have a lot of benefits to it. 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.