Roof leaks are thought by many to be the primary source of water entrance into a building. This may be true in high rainfall areas, but not in Central Texas. Our rainfall in Central and West Texas is so infrequent that water leaks through the roof usually have the opportunity to dry out before fungal growth can become a problem. Roof slope is an important consideration in construction. The less pitch or slope on a roof the more likely the roof will be to leak. Valleys are the primary leak locations.