ASTM-D4897 Historical Revision Information
Standard Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing

ASTM-D4897 - 2001 R09 EDITION - SUPERSEDED
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This specification covers the manufacture and requirements of Type II heavy-duty asphalt-impregnated and coated glass-fiber venting base sheet with mineral surfacing on the top side and coarse mineral granules on the bottom side for use as the first ply of a roofing membrane. The mat shall be a thin porous sheet of uniformly distributed glass fibers, with or without the addition of reinforcing strands, or glass yarns, which are bonded with a water-resistant resinous binder, and shall be permitted to contain holes designated for attachment with mopping asphalt. The material shall conform to physical (longitudinal and transverse breaking strength, and diameter and center-to-center spacing of spot-mopping holes, pliability, loss and behavior on heating, ash content, and moisture) and dimensional (mass, width, and area) property requirements. The finished product shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled at given temperatures.

ORDER

Scope

1.1 This specification covers asphalt-impregnated and coated glass-fiber base sheet with mineral surfacing on the top side and coarse mineral granules on the bottom side for use as the first ply of a roofing membrane. These base sheets provide for the lateral release of pressure in roofing systems because they are not solidly attached and the coarse granular surface provides an open, porous channel in the horizontal plane beneath the membrane. The base sheets shall be permitted to be with or without perforations or embossings.

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 non-conformance with the standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

base sheet; first ply; glass fiber; impregnated and coated; partially attached; Asphalt roofing materials--specifications; Base sheets; Fiberglass--specifications; First-ply roofing; Glass-fiber venting base sheet; Impregnated and coated fabrics for roofing/waterproofing; Mineral-surfaced roofing--specifications; Roofing materials/applications--specifications; Roofing membranes--specifications; Venting base sheet (for roofing); ICS Number Code 91.100.50 (Binders. Sealing materials)

To find similar documents by ASTM Volume:

04.04 (Roofing and Waterproofing)

To find similar documents by classification:

91.100.50 (Binders. Sealing materials Including geomembranes, asphalts for buildings, etc.)

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Document Number

ASTM-D4897/D4897M-01(2009)

Revision Level

2001 R09 EDITION

Status

Superseded

Modification Type

Reapproval

Publication Date

Aug. 1, 2009

Document Type

Specification

Page Count

3 pages

Committee Number

D08.04