ASTM D4897/D4897M-01(2009)

Standard Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing

ABSTRACT
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.
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.

General Information

• Status: Historical
• Publication Date: 14-Jun-2009
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.04 - Felts, Fabrics and Bituminous Sheet Materials

Relations

• Replaces: ASTM D4897-01 - Standard Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing
• Effective Date: 15-Jun-2009
• Referred By: ASTM D228/D228M-21 - Standard Test Methods for Sampling, Testing, and Analysis of Asphalt Roll Roofing, Cap Sheets, and Shingles Used in Roofing and Waterproofing
• Effective Date: 15-Jun-2009
• Referred By: ASTM D2829/D2829M-07(2023) - Standard Practice for Sampling and Analysis of Existing Built-Up Roof Systems
• Effective Date: 15-Jun-2009

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D4897/D4897M −01(Reapproved 2009)
Standard Specification for
Asphalt-Coated Glass-Fiber Venting Base Sheet Used in
Roofing
This standard is issued under the fixed designation D4897/D4897M; 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 Department of Defense.
1. Scope 3. Terminology
1.1 This specification covers asphalt-impregnated and
3.1 Definitions—For definitions of terms used in this
coated glass-fiber base sheet with mineral surfacing on the top specification, refer to Terminology D1079.
side and coarse mineral granules on the bottom side for use as
the first ply of a roofing membrane. These base sheets provide
4. Classification
for the lateral release of pressure in roofing systems because
4.1 Type II—Heavy-duty asphalt-coated glass-fiber venting
they are not solidly attached and the coarse granular surface
base sheet.
provides an open, porous channel in the horizontal plane
beneaththemembrane.Thebasesheetsshallbepermittedtobe
5. Materials and Manufacture
with or without perforations or embossings.
5.1 The mat shall be a thin porous sheet of uniformly
1.2 The values stated in either SI units or inch-pound units
distributed glass fibers, with or without the addition of rein-
are to be regarded separately as standard. The values stated in
forcing strands, or glass yarns, which are bonded with a
each system may not be exact equivalents; therefore, each
water-resistant resinous binder.
system shall be used independently of the other. Combining
5.2 In the process of manufacture, the glass mat is impreg-
values from the two systems may result in non-conformance
natedandcoatedonbothsideswithahotasphalticcoatingwith
with the standard.
or without a mineral stabilizer and surfaced on the bottom side
1.3 This standard does not purport to address all of the
with coarse mineral granules embedded in an asphaltic coating.
safety concerns, if any, associated with its use. It is the
The top side shall be surfaced with fine mineral surfacing.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5.3 The product shall be permitted to be embossed or
bility of regulatory limitations prior to use.
unembossed on the bottom side.The product shall be permitted
to contain holes designated for attachment with mopping
2. Referenced Documents
asphalt.
2.1 ASTM Standards:
D146 Test Methods for Sampling and Testing Bitumen-
6. Physical Requirements, Dimensions, and Masses
Saturated Felts and Woven Fabrics for Roofing and
6.1 The material at the point of manufacture shall conform
Waterproofing
to the physical requirements in Table 1 and the dimensions and
D228 Test Methods for Sampling, Testing, and Analysis of
masses in Table 2.
Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
6.2 The finished product shall not crack nor be so sticky as
Roofing and Waterproofing
to cause tearing or other damage upon being unrolled at
D1079 Terminology Relating to Roofing and Waterproofing
temperatures between 10 and 60°C [50 and 140°F].
6.3 Pliability at 25 6 1°C [77 6 2°F]—At least eight out of
ThisspecificationisunderthejurisdictonofASTMCommittee D08onRoofing
ten strips shall not crack when tested in accordance with Test
andWaterproofing and is the direct responsibility of Subcommittee D08.04 on Felts,
Fabrics and Bituminous Sheet Materials.
Methods D228 except, for convenience, that the strips shall be
Current edition approved June 15, 2009. Published July 2009. Originally
conditioned in ambient conditions at 25 6 1°C [77 6 2°F] for
approved in 1989. Last previous edition approved in 2001 as D4897 – 01. DOI:
at least 30 min before testing over a 19-mm [ ⁄4-in.] radius.
10.1520/D4897_D4897M-01R09.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.4 Loss and Behavior on Heating —There shall be no
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
flowing, sagging, or blistering of the asphalt coating when
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tested in accordance with Test Methods D228.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4897/D4897M−01 (2009)
TABLE 1 Physical Requirements
9. Inspection
Type II
9.1 Inspection—Inspection shall be in accordance with the
Breaking strength, min, at 25 ± 1°C [77 ± 2°F] 7.7 [44]
req
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D4897–01 Designation: D 4897/D 4897M – 01 (Reapproved 2009)
Standard Specification for
Asphalt-Coated Glass-Fiber Venting Base Sheet Used in
Roofing
This standard is issued under the fixed designation D 4897/D 4897M; 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 Department of Defense.
1. 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.
1.2The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
2. Referenced Documents
2.1 ASTM Standards:
D 146 Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and Waterproofing
D 228 Test Methods for Sampling, Testing, and Analysis of Asphalt Roll Roofing, Cap Sheets, and Shingles Used in Roofing
and Waterproofing
D 1079 Terminology Relating to Roofing, Waterproofing, and Bituminous Materials Terminology Relating to Roofing and
Waterproofing
3. Terminology
3.1 Definitions—For definitions of terms used in this specification, refer to Terminology D 1079.
4. Classification
4.1 Type II—Heavy-duty asphalt-coated glass-fiber venting base sheet.
5. Materials and Manufacture
5.1 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.
5.2 In the process of manufacture, the glass mat is impregnated and coated on both sides with a hot asphaltic coating with or
without a mineral stabilizer and surfaced on the bottom side with coarse mineral granules embedded in an asphaltic coating. The
top side shall be surfaced with fine mineral surfacing.
5.3 The product shall be permitted to be embossed or unembossed on the bottom side.The product shall be permitted to contain
holes designated for attachment with mopping asphalt.
This specification is under the jurisdicton of ASTM Committee D08 on Roofing, Waterproofing, Roofing and Bituminous MaterialsWaterproofing and is the direct
responsibility of Subcommittee D08.04 on Felts and Fabrics for Bituminous Roofing and Waterproofing .
Current edition approved November 10, 2001. Published March 2002. Originally published as D4897–89. Last previous edition D4897–98.on Felts and Fabrics.
Current edition approved June 15, 2009. Published July 2009. Originally approved in 1989. Last previous edition approved in 2001 as D 4897 – 01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 04.04.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D 4897/D 4897M – 01 (2009)
TABLE 1 Physical Requirements
Type II
Breaking strength, min, at 25 6 1°C (77 6 2°F) 7.7 (44)
kN/m (lbf/in.)—longitudinal and transverse
Breaking strength, min, at 25 6 1°C [77 6 2°F] 7.7 [44]
kN/m [lbf/in.]—longitudinal and transverse
Diameter of spot-mopping holes, (when present) 25 (1.0)
max, mm (in.)
Diameter of spot-mopping holes, (when present) 25 [1.0]
max, mm [in.]
Spacing of holes, center-to-center (when present) 51 (2.0)
min, mm (in.)
Spacing of holes, center-to-center (when present) 51 [2.0]
min, mm [in.]
max, mm (in.) 152 (6.0)
max, mm [in.] 152 [6.0]
A
TABLE 2 Dimensions and Masses
Type II
Width of roll, mm (in.) 36 (914) 6 0.7 %
Width of roll, mm [in.] 36 [914] 6 0.7 %
2 2
Area of roll, min, m (ft ) 9.64 (104)
2 2
Area of roll, min, m [ft ] 9.64 [104]
2 2
Mass of any roofing in shipment min, g/m (lb/100 ft ) 2685 (55)
2 2
Mass of any roofing in shipment min, g/m [lb/100 ft ] 2685 [55]
2 2
Mass of desaturated glass mat min, g/m (lb/100 ft ) 83 (1.7)
2 2
Mass of desaturated glass mat min, g/m [lb/100 ft ] 8
...