Stevens Roofing Systems

Two Roofing Membranes

Stevens Roofing Systems manufactures two different types of roofing membranes Stevens Hypalon® and Stevens EPTM.

In many ways, the two membranes are similar. Both are heat weldable, available in white, offer the same attachment methods, contain a fully encapsulated reinforcing scrim, and can help owners save energy costs.

Stevens Hypalon roofing membranes are based on DuPont's Hypalon, a chlorosulfonated polyethylene polymer. Highly weatherable Stevens Hypalon has been used in commercial roofing applications since 1980. Stevens Hypalon membrane's fire resistance properties, combined with superb oil and chemical resistance characteristics have made this material the roofing system of choice for many specifiers. Stevens Hypalon membrane is available in white.

Stevens EP roofing membranes are based on a proprietary thermal-plastic polyolefin (TPO) compound of ethylene and propylene from Montell USA. The result is a heat-weldable membrane offering the performance characteristics of rubber. Available in black, white, gray and colors, Stevens EP brand of TPO membranes provide superb tear and puncture resistance at a competitive price.

Stevens membranes are manufactured with a woven polyester reinforcing scrim encapsulated between two layers of compounded membrane. This multi-layer construction provides strength, puncture resistance and durability.

The Scrim

All Stevens membranes are reinforced with a fully encapsulated polyester scrim.

Energy Conservation

The reflectivity of a white, Stevens roofing membrane on an air-conditioned building can save you money just about anywhere in the country, even in the northern states! White roofs can even help to cool non-air-conditioned buildings in the heat of the summer.

Hot Air Welding

All Stevens membranes are heat weldable. Hot-air welding has long been recognized as the strongest, most reliable seaming method in the single-ply industry. Hot-air welding literally fuses the top sheet to the bottom sheet, creating one homogeneous bond that can be made stronger than the membrane itself!

Stevens EPTM or Stevens Hypalon®. The choice is yours. You can't go wrong with either.

Design Freedom

Stevens membranes can be attached to virtually any type of building design, from those with relatively flat or low sloped roofs, to those with higher slopes, including domes, sawtooths, and barrel roofs.

Lightweight

Unlike graveled built-up systems that can weigh up to 600 pounds per square, or ballasted systems that can weigh from 1,000 to 1,500 pounds per square, a mechanically-attached Stevens roofing system weighs less than 30 pounds per square! In new construction, that can provide substantial savings on structural steel.

Compatibility

Stevens membranes can also save costs on re-roofing because they can be installed directly over many types of existing roof materials, and are suitable for direct contact with most common roofing materials.

Repairability

Both Stevens Hypalon and Stevens EP roofing membranes can be easily and economically repaired long after installation on the roof.

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