ASTM D3909/D3909M-22

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Designation: D3909/D3909M − 14 (Reapproved 2021) D3909/D3909M − 22
Standard Specification for
Asphalt Roll Roofing (Glass Felt) Surfaced with Mineral
Granules
This standard is issued under the fixed designation D3909/D3909M; the number immediately following the designation indicates the
year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last
reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
This specification replaces Federal Specification SS-R-630, Class 3.
1. Scope
1.1 This specification covers asphalt-impregnated and coated glass felt roll roofing surfaced on the weather side with mineral
granules, for use as a cap sheet in the construction of built-up roofs.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in nonconformance with the standard.
1.3 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
D228/D228M Test Methods for Sampling, Testing, and Analysis of Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
Roofing and Waterproofing
D1079 Terminology Relating to Roofing and Waterproofing
D4977/D4977M Test Method for Granule Adhesion to Mineral-Surfaced Roofing by Abrasion
3. Terminology
3.1 Definitions—For definitions of terms used in this specification, refer to Terminology D1079.
4. Materials and Manufacture
4.1 The glass felt shall be a thin, porous sheet composed predominately of fine glass fibers uniformly deposited in a nonwoven
pattern. The felt may be reinforced with random or parallel oriented glass yarns, or both, which may be gathered or twisted,
bonded, or unbonded. The felt shall contain a water-insoluble agent.
This specification is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.04 on Felts,
Fabrics and Bituminous Sheet Materials.
Current edition approved Nov. 15, 2021Oct. 1, 2022. Published November 2021October 2022. Originally approved in 1980. Last previous edition approved in 20142021
as D3909/D3909M – 14.D3909/D3909M – 14 (2021). DOI: 10.1520/D3909_D3909M-14R21.10.1520/D3909_D3909M-22.
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volume information, refer to the standard’s Document Summary page on the ASTM website.
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D3909/D3909M − 22
4.2 In the process of manufacture, the glass mat shall be uniformly impregnated and coated on both sides with an asphaltic
material, permitted to be compounded with a mineral stabilizer.
4.3 The weather side shall be uniformly surfaced with mineral granules firmly embedded in the asphaltic coating, except for any
selvage.
4.4 The reverse side shall be covered with a material to prevent sticking in the roll.
5. Physical Properties
5.1 The material shall conform to the dimensions and masses prescribed in Table 1 and areas prescribed in Table 2.
5.2 The finished product shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled at temperatures
between 10 and 60 °C [50 and 140 °F].
5.3 Pliability at 25 °C [77 °F]—At least eight strips out of ten from the granule-surfaced portion of the sheet shall not crack when
tested in accordance with Section 10 of Test Methods D228/D228M.
5.4 Mass Loss and Behavior on Heating—There shall be no more than 1.5 % volatile loss, and the granular surfacing shall not
slide more than 2 mm [ ⁄16 in.] when tested in accordance with Section 11 of Test Methods D228/D228M.
6. Workmanship, Finish, and Appearance
6.1 The glass felt shall be thoroughly and uniformly impregnated with asphalt and shall show no uncoated fibers. The fiber pattern
may be discernible on the back side.
6.2 The surface of the weather side shall be uniform in finish and texture. The mineral granules shall be uniformly distributed in
a smooth layer over the entire surface, except for any selvage, and shall be firmly embedded in the asphalt coating.
6.3 When a selvage is provided, the line of demarcation between the surfaced and unsurfaced porti
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