Commercial Roofing

Flat roofs usually come with a 10- to 20-year warranty but the roofs can last 25 years if properly installed and maintained.

Built-Up Roof (BUR)

The traditional hot-tar-and-gravel roof is built from three or more plies of waterproof material alternated with hot tar and ballasted by a layer of smooth river stone. Once made of tar paper, these types of roofs gradually are using more-advanced materials such as fiberglass membranes.

Modified Bitumen

A single-ply rolled roof similar to ice-and-water shield, but impregnated with a mineral-based wear surface. Torch-down systems involve heating the adhesive as the material is unrolled. Newer peel-and-stick systems are safer and easier.

Rubber Membrane

EPDM (short for ethylene propylene diene monomer) is a true rubber. The durable material resembles an inner tube, but it's engineered to resist damage from sunlight. EPDM can be mechanically anchored with fasteners, ballasted with stone, or glued.

Repairs

Alterations and Retrofits