Ponding On Roof Membrane

Correct drainage is the most critical factor in preserving the life of your pvc roof.

Ponding on roof membrane.

Left unresolved ponding water leads to accelerated erosion and deterioration of the membrane surface and results in premature failure of the roof system. 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 water is defined as an excessive accumulation of water typically in a low lying area that remains on a roof for 48 hours or longer even when conditions are suitable for drying. Damage to the roof membrane may occur from chemical and physical attack from the bio growth as well as the expansion and contraction of the bio growth during wet and dry cycles.

Ponding water may lead to accelerated erosion and deterioration of the membrane surface that can result in failure of the roof system. Over time however ponding water can lead to accelerated aging of the roof membrane. This leads to a decline in the membrane s lifespan and can lead to things like leaks which can cause serious problems for the rest of the building. However this does not mean you should allow water to accumulate or puddle on top of your roof.

This will lead to severe water damage and costly bills. Additionally vegetation and other debris may clog drains and cause additional ponding. Ponding water can exacerbate problems for all roofing systems. Allowing even relatively small amounts of moisture beneath the roof membrane may reduce the thermal efficiency of the insulation.

A small cut or puncture in a roofing membrane may cause minor damage on a well drained roof surface but the same puncture located in an area of standing water may allow significant water infiltration causing damage to the roof insulation roof deck and building contents. Ponding water may lead to accelerated erosion and deterioration of the membrane surface that can result in failure of the roof system. Ponding water accelerates roof system aging by. When ponding water on a flat roof starts to develop it is time to start.

Ponding water isn t an immediate threat in fact roof membranes are made with the same material as pond liners so water penetration is unlikely. This entails stopping ponding water which is a common issue with flat roofs.