ASTM D4601-98

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

SCOPE
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.

General Information

• Status: Historical
• Publication Date: 09-Jan-1998
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.04 - Felts, Fabrics and Bituminous Sheet Materials

Relations

• Replaced By: ASTM D4601-04 - Standard Specification for Asphalt-Coated Glass Fiber Base Sheet Used in Roofing
• Effective Date: 01-Dec-2004

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D 4601 – 98
Standard Specification for
Asphalt-Coated Glass Fiber Base Sheet Used in Roofing
This standard is issued under the fixed designation D 4601; 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 (e) 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 5.2 Intheprocessofmanufacture,asinglethicknessofglass
fiber mat shall be impregnated with hot asphalt, coated on one
1.1 This specification covers asphalt impregnated and
or both sides with a hot asphaltic material, and permitted to be
coated glass fiber base sheet, with or without perforations, for
surfaced with mineral surfacing.
use as the first ply of the built-up roofing.When not perforated,
5.3 The impregnating and coating material shall be a hot-
this sheet is suitable for use as a vapor retarder, with a solid
applied asphalt permitted to be compounded with a mineral
mopping of asphaltic material, under roof insulation or be-
stabilizer.
tween multiple layers of roof insulation.
5.4 The base sheet may be faced with a kraft paper on the
1.2 The values stated in inch-pound units are to be regarded
bottom side.
as the standard.
6. Physical Requirements, Dimensions, and Masses
2. Referenced Documents
6.1 Thematerialshallconformtothephysicalrequirements,
2.1 ASTM Standards:
dimensions, and masses described in Table 1 and Table 2.
D 146 Test Methods for Sampling and Testing Bitumen-
Saturated Felts and Woven Fabrics for Roofing and Wa-
terproofing
A
TABLE 1 Physical Requirements
D 228 Test Methods for Asphalt Roll Roofing, Cap Sheets,
Description Type I Type II
and Shingles
D 1079 Terminology Relating to Roofing, Waterproofing, Breaking strength, minimum lbf/in (kN/ 22 (3.9) 44 (7.7)
m) longitudinal and transverse
and Bituminous Materials
Pliability, ⁄2 in. (13 mm) radius
Maximum failures, 10 specimens 0 0
3. Terminology
A
To prevent the asphalt glass fiber base sheet from slipping from between the
3.1 Definitions—For definitions of terms used in this speci-
jawsofthetensiletestingmachine,insertathinstripofsoftgasketrubberbetween
fication, refer to Terminology D 1079. the felt in each of the four jaw faces of the machine.
4. Classification
4.1 Asphalt impregnated and coated glass fiber base sheet,
It may have small pin holes throughout the sheet.
Type I and Type II, are covered by this specification.
6.2 Perforated material shall conform to the physical re-
quirements, dimensions, and masses described in Tables 1-3. It
5. Materials and Manufacture
may have small pin holes throughout the sheet.
5.1 The mat shall be a thin, porous mat of uniformly
6.3 The finished product shall not crack nor be so sticky as
distributed glass fibers, with or without additional reinforcing
to cause tearing or other damage upon being unrolled at
strands of glass yarn, and bonded with a water-resistant
temperatures between 40 and 140°F (4 and 60°C).
resinous binder.
7. Workmanship, Finish, and Appearance
7.1 The finished material shall be uniformly impregnated
This specification is under the jurisdiction of ASTM Committee D-8 on
and coated with asphalt. It shall be free of visible defects such
Roofing,Waterproofing, and Bituminous Materials and is the direct responsibility of
Subcommittee D08.04 on Felts and Fabrics for Bituminous Roofing and Water-
as holes, ragged or untrue edges, breaks, cracks, tears, and
proofing.
protrusions. This is not to exclude perforations for the specific
Current edition approved Jan. 10, 1998. Published September 1998. Originally
purpose of providing for venting of gases during application or
published as D 4601 – 86. Last previous edition D 4601 – 97a.
small pin holes.
Annual Book of ASTM Standards, Vol 04.04.
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D 4601
A
TABLE 2 Dimensions and Masses
Description Type I Type II
Width of roll, in
...