Manufacturers / Roof Products and Systems

A US maker of prefabricated rooftop products founded in 1963, whose line covers conventional, metal-building, expansion and wall, kitchen-ventilation and special-application roof curbs, curb adapters and extensions, equipment rails, and pipe and duct mounting pedestals, along with roof flashings and pipe portal systems. It states its products are made in the US and that it is part of the Duravent Group portfolio of brands; its contact page gives a Grand Rapids, Michigan customer service address, while its older submittal forms print a Carol Stream, Illinois address and a Hart & Cooley copyright.