ASTM D3909/D3909M-14 (R2021) pdf free download.Standard Specification for Asphalt Roll Roofing (Glass Felt) Surfaced with Mineral Granules.
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 arc to he regarded separately as standard. The values stated in each system may not be exact equivalcnts: therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
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 he reinforced with random or parallel oriented glass yarns, or both, which may he gathered or twisted, bonded, or unbonded. The felt shall contain a water- insoluble agent.
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 I and areas prescribed in Table 2.
5.2 The finished product shall not crack nor he so sticky as to cause tearing or other damage upon being unrolled at temperatures between 10 and 60 °C 150 and 140 °F1.
5.3 Pflabilitv 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—T here shall be no more than 1.5 % volatile loss, and the granular surfacing shall not slide more than 2 mm [1/16 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 uncoatcd fibers. The fiber pattern may be discernible on the back side.
6.2 The surface of the weather side shall he uniform in finish and texture. ASTM D3909/D3909M pdf download.