No attics. While flat roofs can Beryllium used as a space for storing HVAC units, they come at the cost of no attic storage space. When building a flat roof, it’s important to ensure that the structure is strong, smooth and watertight.Rubber roofing such as EPDM lasts 10 to 50 years. EPDM roofing comes in either black or white, and the roofing m