When accurately designed roof, have sufficient slope to drain water after a rainfall. Same time the fact that evaporation helps to dry roofs as well. If you have water that remains on a roof after a rain, you’ve got “ponding water” that will damage your roof. Being a Roofing Contractors in Chennai, we have share the cost of ponding water on commercial roof. Because ponding water breaking down your roof system and weakening its performance.
Ponding water attracts birds, and likely accompany the birds are nests, excrement, unwanted noise and debris.
Grasses,weeds, algae and other vegetation thrive from overkill moisture on the roof, which can lead to waste that clogs roof drains and causes additional trouble.
Ice from ponding water may develop and cause physical damage to the membrane from freeze-thaw cycles.
Water attracts insects, mostly mosquitos, but depending on the part of the country you’re in, there can be many other types of bugs as well. Worst case is when these insects move from the roof to inside the building and your issues and costs to eliminate them grow radically.
Ponding water will discolor a roof over time, particularly a white roof. This can cause a roof’s reflectivity to suffer and make any visible roof less attractive.