ASTM D4601/D4601M-04(2020)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:D4601/D4601M −04 (Reapproved 2020)
Standard Specification for
Asphalt-Coated Glass Fiber Base Sheet Used in Roofing
This standard is issued under the fixed designation D4601/D4601M; 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 U.S. Department of Defense.
1. Scope 4. Classification
1.1 This specification covers asphalt impregnated and 4.1 Asphalt impregnated and coated glass fiber base sheet,
Type I and Type II, are covered by this specification.
coated glass fiber base sheet, with or without perforations, for
use as the first ply of the built-up roofing.When not perforated,
5. Materials and Manufacture
this sheet is suitable for use as a vapor retarder, with a solid
5.1 The mat shall be a thin, porous mat of uniformly
mopping of asphaltic material, under roof insulation or be-
distributed glass fibers, with or without additional reinforcing
tween multiple layers of roof insulation.
strands of glass yarn, and bonded with a water-resistant
1.2 The values stated in either SI units or inch-pound units
resinous binder.
are to be regarded separately as standard. The values stated in
5.2 Intheprocessofmanufacture,asinglethicknessofglass
each system may not be exact equivalents; therefore, each
fiber mat shall be impregnated with hot asphalt, coated on one
system shall be used independently of the other. Combining
or both sides with a hot asphaltic material, and permitted to be
values from the two systems may result in nonconformance
surfaced with mineral surfacing.
with the standard.
5.3 The impregnating and coating material shall be a hot-
1.3 This international standard was developed in accor-
applied asphalt permitted to be compounded with a mineral
dance with internationally recognized principles on standard-
stabilizer.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 5.4 The base sheet may be faced with a kraft paper on the
mendations issued by the World Trade Organization Technical
bottom side.
Barriers to Trade (TBT) Committee.
6. Physical Requirements, Dimensions, and Masses
2. Referenced Documents
6.1 The material shall conformto the physicalrequirements,
dimensions, and masses described in Tables 1 and 2.Itmay
2.1 ASTM Standards:
have small pin holes throughout the sheet.
D146/D146M Test Methods for Sampling and Testing
Bitumen-Saturated Felts and Woven Fabrics for Roofing
6.2 Perforated material shall conform to the physical
and Waterproofing
requirements, dimensions, and masses described in Tables 1-3.
D228/D228M Test Methods for Sampling, Testing, and
It may have small pin holes throughout the sheet.
Analysis of Asphalt Roll Roofing, Cap Sheets, and
6.3 The finished product shall not crack nor be so sticky as
Shingles Used in Roofing and Waterproofing
to cause tearing or other damage upon being unrolled at
D1079 Terminology Relating to Roofing and Waterproofing
temperatures between 4 and 60 °C [40 and 140 °F].
3. Terminology
7. Workmanship, Finish, and Appearance
3.1 Definitions—For definitions of terms used in this
7.1 The finished material shall be uniformly impregnated
specification, refer to Terminology D1079.
and coated with asphalt. It shall be free of visible defects such
as holes, ragged or untrue edges, breaks, cracks, tears, and
This specification is under the jurisdiction of ASTM Committee D08 on
protrusions. This is not to exclude perforations for the specific
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.04
purpose of providing for venting of gases during application or
on Felts, Fabrics and Bituminous Sheet Materials.
small pin holes.
Current edition approved May 1, 2020. Published May 2020. Originally
approved in 1986. Last previous edition approved in 2012 as D4601/D4601M – 04
8. Sampling and Test Methods
(2012). DOI: 10.1520/D4601_D4601M-04R20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
8.1 Sample the material and determine the properties de-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
scribed in this specification in accordance with Test Methods
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. D228/D228M unless otherwise indicated.
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D4601/D4601M−04 (2020)
A
TABLE 1 Physical Requirements
10. Rejection and Resubmittal
Description Type I Type II
10.1 Failure to Conform—Failure to
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