ASTM D2626/D2626M-04(2012)e1
(Specification)Standard Specification for Asphalt-Saturated and Coated Organic Felt Base Sheet Used in Roofing
Standard Specification for Asphalt-Saturated and Coated Organic Felt Base Sheet Used in Roofing
ABSTRACT
This specification covers the standard for asphalt-saturated and coated organic felt base sheet with mineral surfacing on the top side, with or without perforations. These sheets are proposed for use as the first ply of a built-up roof and are also suitable for use as vapor retarder. The felt shall be manufactured principally from organic fibers, or mixtures thereof. The surface shall be smooth and uniform and reasonably free of lumps and particles of foreign substances. Physical requirements such as pliability, breaking strength, and water vapor permeance of the materials shall comply with the specifications prescribed herein.
SCOPE
1.1 This specification covers asphalt-saturated and coated organic felt base sheet with mineral surfacing on the top side, with or without perforations, for use as the first ply of a built-up roof. When not perforated, this sheet is suitable for use as a vapor retarder, with a solid mopping of asphaltic material, under roof insulation or between multiple layers of roof insulation.
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.
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´1
Designation:D2626/D2626M −04 (Reapproved 2012)
Standard Specification for
Asphalt-Saturated and Coated Organic Felt Base Sheet
Used in Roofing
This standard is issued under the fixed designation D2626/D2626M; 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.
´ NOTE—Units information was editorially corrected in June 2012.
1. Scope 3. Terminology
3.1 Definitions—For definitions of terms used in this
1.1 This specification covers asphalt-saturated and coated
organic felt base sheet with mineral surfacing on the top side, specification, refer to Terminology D1079.
with or without perforations, for use as the first ply of a
3.2 Definitions of Terms Specific to This Standard:
built-up roof.When not perforated, this sheet is suitable for use
3.2.1 lot—for the purpose of sampling, a lot shall consist of
as a vapor retarder, with a solid mopping of asphaltic material,
allmaterialofthesametypeandsizeofferedfordeliveryatone
under roof insulation or between multiple layers of roof
time.
insulation.
1.2 The values stated in either SI units or inch-pound units 4. Materials and Manufacture
are to be regarded separately as standard. The values stated in
4.1 In the process of manufacture, a single thickness of dry
each system may not be exact equivalents; therefore, each
organic felt shall be saturated with hot asphalt, coated on both
system shall be used independently of the other. Combining
sides with a hot asphaltic material, and surfaced on the top side
values from the two systems may result in non-conformance
with mineral surfacing.
with the standard.
4.2 The felt shall be produced principally from organic
fibers, or mixtures thereof. The surface of the felt shall be
2. Referenced Documents
uniform and relatively smooth. Upon splitting or tearing on the
2.1 ASTM Standards:
bias,thefeltshallappearreasonablyfreeoflumpsandparticles
D146 Test Methods for Sampling and Testing Bitumen-
of foreign substances.
Saturated Felts and Woven Fabrics for Roofing and
4.3 The coating shall be a hot-applied asphalt material
Waterproofing
permitted to be compounded with a mineral stabilizer.
D226 Specification forAsphalt-Saturated Organic Felt Used
in Roofing and Waterproofing
4.4 The reverse side of the base sheet may be covered with
D228 Test Methods for Sampling, Testing, and Analysis of
a suitable material to prevent sticking in the roll.
Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
Roofing and Waterproofing
5. Physical Properties
D1079 Terminology Relating to Roofing and Waterproofing
5.1 The material shall conform to the physical requirements
E96/E96M Test Methods for Water Vapor Transmission of
prescribed in Table 1 and the dimensions and masses pre-
Materials
scribed in Table 2 and Table 3. Perforated base sheets shall
conform to the same requirements as the plain type but shall
also have uniformly spaced perforations.
This specification is under the jurisdiction of ASTM Committee D08 on
5.2 The finished product shall not crack nor be so sticky as
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.04
on Felts, Fabrics and Bituminous Sheet Materials. to cause tearing or other damage upon being unrolled at
Current edition approved May 1, 2012. Published June 2012. Originally
temperatures between 10 and 60°C [50 and 140°F].
approved in 1967. Last previous edition approved in 2004 as D2626 – 04. DOI:
10.1520/D2626_D2626M-04R12E01.
6. Dimensions, Mass, and Permissible Variations
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 The material shall conform to the dimensions and
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. masses prescribed in Table 2.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
D2626/D2626M−04 (2012)
TABLE 1 Physical Requirements of Asphalt-Saturated and
7.3 The mineral surfacing shall be applied uniformly over
Coated Base Sheet
the entire surface of the top side of the sheet. If soap or other
Pliability, number of failures, max 2
material is used on the reverse side of the sheet, the amount
Behavior on heating no flowing, sagging,
applied shall not be so great as to interfere with adhesion
blistering, or absorption of
between the base sheet and plying cement. Coarse mica shall
the coating
Average breaking strength, min, kN/m
not be used on either surface.
[lbf/in.] width:
with fiber grain 6.1 [35]
7.4 The finished material shall be free of visible defects
across fiber grain 3.5 [20]
such as holes, ragged or untrue edges, breaks, cracks, tears,
A
Water vapor permeance, at 23°C [73.4°F], 17 [0.3]
2 2
protuberances, and indentations, except for intentionally pro-
max, ng/Pa·s·m [grains/h·ft ·in·Hg]
A
vided perforations and the associated protuberances.
Test nonperforated sheet only.
8. Sampling and Test Methods
TABLE 2 Dimensions and Masses of Asphalt-Saturated
...
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.
´1
Designation:D2626–04 Designation: D2626/D2626M – 04 (Reapproved 2012)
Standard Specification for
Asphalt-Saturated and Coated Organic Felt Base Sheet
Used in Roofing
This standard is issued under the fixed designation D2626/D2626M; 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.
´ NOTE—Units information was editorially corrected in June 2012.
1. Scope
1.1 This specification covers asphalt-saturated and coated organic felt base sheet with mineral surfacing on the top side, with
or without perforations, for use as the first ply of a built-up roof. When not perforated, this sheet is suitable for use as a vapor
retarder, with a solid mopping of asphaltic material, under roof insulation or between multiple layers of roof insulation.
1.2The values stated in SI units are to be regarded as the standard. The values 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.
2. Referenced Documents
2.1 ASTM Standards:
D146 Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and Waterproofing
D226 Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing
D228 Test Methods for Sampling, Testing, and Analysis of Asphalt Roll Roofing, Cap Sheets, and Shingles Used in Roofing
and Waterproofing
D1079 Terminology Relating to Roofing and Waterproofing
E96/E96M Test Methods for Water Vapor Transmission of Materials
3. Terminology
3.1 Definitions—For definitions of terms used in this specification, refer to Terminology D1079.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 lot—for the purpose of sampling, a lot shall consist of all material of the same type and size offered for delivery at one
time.
4. Materials and Manufacture
4.1 In the process of manufacture, a single thickness of dry organic felt shall be saturated with hot asphalt, coated on both sides
with a hot asphaltic material, and surfaced on the top side with mineral surfacing.
4.2 The felt shall be produced principally from organic fibers, or mixtures thereof. The surface of the felt shall be uniform and
relatively smooth. Upon splitting or tearing on the bias, the felt shall appear reasonably free of lumps and particles of foreign
substances.
4.3 The coating shall be a hot-applied asphalt material permitted to be compounded with a mineral stabilizer.
4.4 The reverse side of the base sheet may be covered with a suitable material to prevent sticking in the roll.
This specification is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.04 on Felts
and Fabrics.
Current edition approved Aug.1, 2004. Published August 2004. Originally approved in 1967. Last previous edition approved in 1997 as D2626–97b. DOI:
10.1520/D2626-04.on Felts, Fabrics and Bituminous Sheet Materials.
Current edition approved May 1, 2012. Published June 2012. Originally approved in 1967. Last previous edition approved in 2004 as D2626 – 04. DOI:
10.1520/D2626_D2626M-04R12E01.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
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.
´1
D2626/D2626M – 04 (2012)
5. Physical Properties
5.1 The material shall conform to the physical requirements prescribed in Table 1 and the dimensions and masses prescribed
in Table 2 and Table 3. Perforated base sheets shall conform to the same requirements as the plain type but shall also have
uniformly spaced perforations.
5.2 Thefinishedproductshallnotcracknorbesostickyastocausetearingorotherdamageuponbeingunrolledattemperatures
between 10 and 60°C (50[50 and 140°F). 140°F].
6. Dimensions, Mass, and Permissible Variations
6.1 The material shall conform to the dimensions and masses prescribed in Table 2.
6.2 Perforated material shall also conform to the dimensions and other requirements prescribed in Table 3.
7. Workmanship, Finish, and Appearance
7.1 The felt shall be thoroughly and uniformly saturated, and shall show no unsaturated spots at any point upon cutting 50-mm
(2-in.)[2-in.] wide strips at random across the entire width of the sheet and splitting them open for their full length.
7.2 The coating shall be applied uniformly on both sides of the sheet in a continuous, unbroken film that extends to the edges
of the sheet. The coating may be smooth or finely veined, but not coarsely veined.
7.3 The mineral surfacing shall be applied uniformly over the entire surface of the top side of the sheet. If soap or other material
is used on the reverse side of the sheet, the amount applied shall not be so great as to interfere with adhesion between the base
sheet and plying cement. Coarse mica shall not be used on either surface.
7.4 The finished material shall be free of visible defects such as holes, ragged or untrue edges, breaks, cracks, tears,
protuberances, and indentations, except for intentionally provided perforations and the associated protuberances.
8. Sampling and Test Methods
8.1 Sample the material and determine the properties enumerated in this specification in accordance with Test Meth
...
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