Roofs provide one of the most fundamental functions of a building: shelter from the elements. They must endure drastic temperature swings, long-term exposure to ultraviolet (UV) light, high winds, rain, hail and, depending on the climate, snow.

In conflict with these performance and durability requirements, much of the roofing industry is driven by highly competitive economics and thin profit margins. Since shingles are rarely recycled, the 15- or 20-year typical life span of asphalt composite roofing products makes them highly resource-intensive. The National Roofing Contractors Association estimates that 75 percent of the dollars spent on roofing in the U.S. are for replacing or repairing existing roofs.


Products in Roofing

AMERGREEN Roof Garden System
American Wick Drain Corporation
CertainTeed Corporation
Reclaimed-Wood Lumber and Products
Armster Reclaimed Lumber Co.
Battens Plus, Inc.
Boral Material Technologies Inc.
Cedar Breather
Benjamin Obdyke Inc.
Columbia Green Technologies


Oct 20, 2011 5:33 PM ET

Response to Mike McGlone
by Martin Holladay

Information on standing-seam metal roofing can be found in the GBA Encylcopedia:

Oct 20, 2011 5:08 PM ET

by Mike McGlone

Why is there no information on standing seam metal roofs - tern or galavanized - on this site?