Ponding On Flat Roof

Low spots in the roofing allow water to pond which can.

Ponding on flat roof.

This is especially prevalent after a lot of rainstorms. But there is one definitive downside to those flat roofs. Because these roofs don t drain water that well they are prone to developing what is known as ponding water. 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.

So if your flat roof is collecting water that doesn t drain or evaporate within 48 hours you will need to fix it. Common problems caused by flat roof ponding. This is because the flat roof can hinder drainage from rainwater which results in standing water on the roof. And as a result water can end up building up on your roof causing small bodies of rainwater to become an almost permanent feature.

Flat roofs have subtle slopes to facilitate drainage. One of the biggest problems with large flat roofs is that they tend to pond water in certain areas. 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. A sagging roof deck.

Install additional drains. Having a flat roof can have a lot of benefits to it. However excessive ponding threatens your roof. 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. Opening or unclogging existing drains. Flat roofs by their very nature will collect some water when it rains. 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.

Ponding problems for flat roofs. 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. Those pitched roofs have a natural slope where the water can run down draining off the roof.

If there are low spots on the. 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. How to stop ponding from happening fixing low spots on flat roofs. Ask your sarasota area roofing contractor if you need to install crickets which are triangles of insulation which steers water flow around these elements.

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. It will actually destroy just about every roof coating there is even ours. Ponding is caused by a range of factors including.