Flat roofs should always have a slight pitch for quick drainage of rainwater but sunken areas that create puddles can appear from time to time.
Should flat roofs have puddles.
After the 2 days the water is going to start sinking into the roof system.
A roof should not have puddles because roofs are not designed to hold the weight of a large amount of water.
Flat roofs really shouldn t be flat.
When these sunken areas appear it s important to examine the problem carefully and determine if it is related to structural damage.
This means that once the rain stops you have about 2 days to get rid of the standing water or puddles that are on the roof.
Long term effects of ignoring ponding water on a flat roof by ignoring long term ponding water on a commercial flat roof you increase the odds of having serious roofing problems.
However puddles 1 or more inches deep that linger for days can indicate a significant problem with.
They normally will have at least a inch to a foot slope and many roofers prefer more.
According to the national roofing contractors association pooled water in excess of 48 hours can start to become problematic.
Flat roofs should not have puddles.
By lori lapierre by their very nature flat roofs do not completely drain after it rains.