Built-Up and Hot Mopped Roofing:
The original form of flat roofing that uses rigid insulation board of tapered foam or Perlite. Several plies of fiberglass felts are layered in hot melted asphalt and topped with hot asphalt and embedded with gravel, or a granulated cap sheet membrane.
Modified Membrane and Bitumen Rubber Roofing:
These are modern flat roofing materials which are designed to replace traditional hot asphalt and gravel embedded roofs. These materials weather well and resist the damaging effects of pooling water. With a variety of use applications and acceptable methods of installation, these new materials are a good solution for most roofing needs.
Thermoplastic (TPO) Roofing Membranes:
These materials are most commonly PVC (Polyvinyl Chloride) vinyl membranes or TPO (Thermoplastic Olefin) membranes. The material is applied by using of hot air heat welding, chemical bonding with use of solvent adhesives or any combination of the two. These are the most expensive flat roofing systems and are engineered to last for many years. PVC and TPO roofing materials are easily repaired by heating or chemically bonding a repair patch.