1.1 This specification covers asphalt impregnated and coated glass fiber base sheet, with or without perforations, for use as the first ply of the built-up roofing. When not perforated, this sheet may be used as a vapor retarder under or between roof insulation with solid top coating of asphaltic material.
1.2 The values stated in inch-pound units are to be regarded as the standard.
| ASTM International | |
|---|---|
| Product Category | Standards and Technical Documents |
| Product Number | ASTM D4601-98 |
| Product Name | Standard Specification for Asphalt-Coated Glass Fiber Base Sheet Used in Roofing |
