ASTM D3909-14(R2021) pdf free download
ASTM D3909-14(R2021) pdf free download.Standard Specification for Asphalt Roll Roofing (Glass Felt) Surfaced with Mineral Granules
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 accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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. 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 [ 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 im- pregnated 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 portions ofthe sheet shall be straight and parallel to the edges of the sheet. A suitable material shall be applied to prevent sticking of the coated selvage in the roll. 6.4 The asphalt coating and the material applied to the reverse side of the sheet to prevent sticking in the roll shall be uniform over the entire surface. 6.5 The finished material shall be free of visible defects such as holes, ragged or untrue edges, breaks, cracks, tears, protuberances, and indentations.
7. Sampling and Test Methods
7.1 Sample the material and determine the properties enu- merated in this specification in accordance with Test Methods D228/D228M.
8. Inspection
8.1 Inspection—Inspection shall be in accordance with the requirements of this specification. 8.2 Inspection Alternatives—Alternative inspection require- ments shall be determined by and as agreed upon between the purchaser and the supplier.
