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Roofing materials and roof systems

Abstract
Roofing professionals have become concerned about the consolidation of manufacturers of roofing products. A comparison between the 1999 edition of the NRCA Roofing Materials Guide(s) and past editions indicate that although there are fewer manufacturers listed there are more products and systems listed.
Date
2/1999
Author(s)
Mark Graham
Page(s)
93
Keyword(s)
roofing materials; Materials Guide



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