Water standing on a concrete flat roof is something that should be dealt with as soon as possible after the ponding is noted. Failure to do so can quickly exacerbate the problem by allowing the water to seep into lower sections of the building and/or further deteriorate the integrity of the roof and substructure.
Inspection and Determination
Ponding on a concrete roof is usually the result of sub-structure deflection. This deflection can be the result of several possible occurrences. these include foundation shifting, support structure weakening or failure, and roof material failure. This is only a small but major list of possibilities.
Inspecting the area directly under the pooling area is essential to determine what is causing the pooling. When inspecting the area under the ponding, look for anything that seems to indicate a structural failure in support beams, settling of the foundation or sub floors or degradation of materials in the sub-structure.
Once the fault is detected or suspected, it will then be possible to create a plan to reinforce the integrity of the roof.