Paroli, R. and Baskaran, A.
1996 Building, v. 46, no. 2, April/May pp. 11-12, 14
Paroli, R. and Baskaran, A., (1996), "Keeping roofs on and working", Building, v. 46, no. 2, April/May pp. 11-12, 14.
Abstract:
Provides an overview of roofing problems, and current research efforts at IRC.
"The roofing market in North America is about C$2.6 billion annually, and most of that is reroofing. Roofs are most likely one of two types - asphalt-based built-up roofing (BUR) or single-ply membrane roofing. BUR consists of several plies of roofing materials (saturated felts, coated felts, fabrics or mats) assembled on site with alternate layers of bitumen and surfaced with aggregate, whereas single-ply roofing goes on in a single sheet.
According to a 1994 Canadian Roofing Contractors' Association survey, the three main roof membrane assembly systems in Canada (and their market share) were as follows: BUR, 54.7%, polymer-modified bitumen, 33.4%, and polymer-based single ply, 10%. In the United States, single-ply membrane roofs have become the most popular. In North America as a whole, BUR is the most common roofing system.
Whatever the material used, a roof is a critical part of the building envelope, and if it does not perform properly it can degrade the performance of the whole building.
DOE--Department of Energy "The Department of Energy's overarching mission is enhancing national security. Responsibility for accomplishing this mission is shared between four principal program lines."
IRC: Institute for Research in Construction "Canada's research, building code development, and materials evaluation services, .. issues that have a large economic impact, assisting industry to innovate and develop technologies that are safe, durable and cost-effective. "
