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About This Item

 

Full Description

1. Scope

1.1

This Standard covers asphalt saturated organic roofing felt, with 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.
 

Document History

  1. CSA A123.3-05 (R2015)


    Asphalt Saturated Organic Roofing Felt (Reaffirmed 2010)

    • Most Recent
  2. CSA A123.3-98

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    Asphalt Saturated Organic Roofing Felt

    • Historical Version