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Are fire ratings permanent

Abstract
In October, the Midwest Roofing Contractors Association (MRCA), as part of its' convention program, issued a report about its testing of fire resistance of aged roof membrane assemblies.
Date
1/2002
Author(s)
Mark Graham
Page(s)
53
Source
Professional Roofing / National Roofing Contractors Assn
Keyword(s)
fire ratings; fire testing; code requirement; MRCA; aged roof

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