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This paper describes a new analytical method for determining the mean and standard deviation of the mass of each component of all asphalt coated felt products, excluding APP (atactic polypropylene) modified bituminous products (APP and other polypropylenes are relatively insoluble in 1,1,1 trichloroethane).
Methods for estimating the composition of products manufactured on asphalt saturated organic and asbestos felts are well known. Until now, similar analytical methods have not been available for products made with glass fiber felts. This new method adapts and improves on the older methods, to provide more refined and precise data for products made with most felt types, and which may lead to new concepts about the performance of these products.
Specific examples include comparative analyses of the exposed and unexposed segments of a typical 3-tab strip asphalt shingle manufactured on glass fiber felts, the top part of a laminated asphalt shingle manufactured on glass fiber felts, an SBS (styrene-butadiene-styrene) modified asphalt sheet, a conventional asphalt shingle manufactured on organic felt, and an SBS modified shingle made on a glass fiber felt.
analysis, asphalt, glass fiber felts, prepared roofing, quantitative analysis, roll roofing, shingles
Vice President and Principalconsulting engineers and building pathologists, Simpson Gumpertz & Heger Inc., ArlingtonSan Francisco, MACA