Flat roofs are completely different from sloped roofs. Water can run down sloped roofs and go down to the drain. But that is not the case on flat roofs. The entire flat roof must have a layer of watertight seal so that water cannot come through the roof and cause leaks in the house. But like the sloped roof, flat roofs can get damaged and thus need roof repair. It's a good thing that you can do roof repair on flat roofs, as long as you know how to.
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