The answer to 'types of flat roof' is that there are several common types of flat roofing systems used on homes and commercial buildings. The most popular options include built-up roofing (BUR), modified bitumen, single-ply membrane, and spray polyurethane foam (SPF). Each type has its own unique advantages, installation process, and maintenance requirements.
Built-up roofing (BUR) is a traditional multi-layer system made of asphalt, fiberglass or organic felts, and a gravel or mineral surface. It provides excellent durability and weather protection. Modified bitumen is a hybrid system that combines the benefits of traditional BUR with more modern polymer-modified asphalt. Single-ply membrane roofs, such as EPDM, TPO, and PVC, are a popular choice for their easy installation and seamless finish. Spray polyurethane foam (SPF) roofs create a seamless, monolithic surface that provides exceptional insulation and waterproofing.