We do the best flat roof repairs rebuilds and recoats in Tucson. Here's why. To do a flat roof properly you must start at the top of the parapit wall. All cracks in the top of the wall must be patched with rubber cement. And the top of the wall must then be coated with roof coating, as house paint does not seal the stucco. This eliminates frost damage, and leaks down the wall. All skylights need to be sealed with silicone, where the plastic dome goes under the aluminum frame. Skylights leak if this important step is not done.