Flat Roofs & Pooling of Water Tucson
In Tucson, most flat roofs will have a slight pitch to them so that they will be directed to drains. This slope is so that water will drain toward and off of the roof edges, it will then be directed by drain pipes. If there is not a sufficient slope, it will instead form a pool on top of a roof that can lead to significant damage.
When water pools on a roof it acts in two ways. First, the water will reduce and erode the protective roof coating. Second, once the protective roof coating is worn away, water can erode and damage the roof, and it will leak into the house and cause further damage.
When a roofing contractor in Tucson sees evidence of water pooling on a roof which is likely to remain there 72 hours or more, the roofing contractor must inform the resident and put it in writing.