Close-up

Asphalt is one of the oldest materials used in the roofing industry. Although asphalt can be an excellent waterproofing material, it tends to crack as a result of freeze-thaw cycles. To increase the thermal window and improve strength and performance, various modifiers have been added to asphalt.

At The Garland Co., Cleveland, researchers have been working on OptiMax,™ a roof membrane that combines polyurethane and asphalt, producing an active modification process that causes the polyurethane to chemically react with the asphaltene to reduce the effects of exterior exposure. Surfacing minerals are attracted to polyurethane and adhere longer, reducing the aging process.

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