It has a very low slope between 1 4 to 1 2 inch per foot so that it drains water.
Should flat roofs hold water.
The most common reason that flat roofs hold or pond water is because of inadequate or obstructed drainage.
Roof systems are simply not designed to hold water.
Collect dirt which may cause the growth of vegetation or telegraph mud cracking to the roof below.
Even flat roofs contain a slight slope to maintain positive drainage.
Flat roofing is not actually flat.
Leaving water on a flat roof for less time can help minimize roofing damage.
The consequences of your flat roof collecting standing water.
Ponding water is typically a sign of a drainage problem that needs to be addressed because when left unaddressed ponding water on a roof can.
But such a low slope holds snow and water much longer than a steeply pitched roof and therefore needs a very different material to stay watertight.
There s a problem with flat roofs.
However puddles 1 or more inches deep that linger for days can indicate a significant problem with draining.
By their very nature flat roofs do not completely drain after it rains.
Water does not run off of it very easily.