Modified Bitumen

Modified bitumen is a prefabricated membrane, composed of a blending of high performance, weathering polyester and glass fiber membranes together with asphalt bitumen. Modified bitumen roof systems can be either applied into cold adhesive, hot steep asphalt or heat-welded into place.

The modified bituminous single-ply roofing system offers the roof tremendous tensile strength, reinforcement and elongation benefits.



Performance, Firestone, GAF, Johns Manville, Siplast, Tremco, Garland and Soprema.

Roofing and Sheet Metal Experts

Specialized in commercial, industrial, institutional and architectural sheet metal roofing, L. Marshall also provides ongoing maintenance and other construction services on historical buildings and local landmarks.