These roofs are usually known as gravel & tar roofs. The roof consists of alternating layers of bitumen including reinforcement fabric layers to form the finished roof membranes. These systems are usually laid out in cross sections and fastened to the roof deck for adherence. The membranes of this system are called plies while the reinforcement layers are known as roof felts. The bitumen in BUR systems is made of asphalt, tar or coal. These roofing systems are quite popular across commercial buildings in the country.
This is another popular roofing system for commercial buildings across the country. Metal roofs consist of several kinds of metal materials. Zinc aggregates, silicone or aluminum coated steel, aluminum, copper, stainless steel, metal tile sheets, tin, lead, and stone-coated steel are some of the most common in this regard. Most types of metal roofs come with surfacing layers applied to protect from rust due to prolonged exposure to sunlight. This coating helps protect against rust, sunlight, waterproofing, and other harsh weather elements. These coatings are usually made of acrylic, ceramic or epoxy.
Single-ply membranes are usually factory-made. They come in two categories such as thermoset and thermoplastic membranes. TPO and PVC belong to thermoplastic membranes while EPDM belongs to thermoset membranes. Single ply membranes are mechanically attached to the roof. You will not find any coatings or surfacing layers in single-ply roofs. But they come with reinforcement material such as glass fiber, felt or polyester fabric.
This is a foam-based commercial roofing system popular across the country. These roofs consist of a two-part liquid such as polyurethane foam insulation and a surfacing layer to protect against inclement weather, fire, and the sun. These are some of the most common types of commercial roofing on the market.