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This document is purchased as a PDF (Portable Document Format) and accessed via CSA OnDemand™, where you can view, navigate, and print it, or download it for offline use with Adobe Acrobat Viewer. This PDF contains Digital Rights Management protection and is intended for individual use. Please see Terms of Use for CSA’s copyright license and more information.
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This document is purchased as a PDF (Portable Document Format) and accessed via CSA OnDemand™, where you can view, navigate, and print it, or download it for offline use with Adobe Acrobat Viewer. This PDF contains Digital Rights Management protection and is intended for individual use. Please see Terms of Use for CSA’s copyright license and more information.
1.1 This Standard covers asphalt saturated organic roofing felt, w ith or without perforations, for use in the membrane system of waterproofing systems and in the construction of built-up roofs using asphalt systems.
1.2 The following types of roofing felt are addressed by this Standard:
(a) Type 1 - a roofing felt that may be used in the construction of a built-up roof membrane (when perforated), as an underlay felt beneath asphalt shingles (when not perforated), or as a building wrap beneath brick, stucco, siding, etc. It is commonly called No. 15 felt; (b) Type 2 - a roofing felt used as an underlay beneath asphalt shingles, wood shakes, tiles, and other sloped roof coverings. It is commonly called No. 25 or No. 30 felt.
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