ASTM D6757/D6757M-18

Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing

ABSTRACT
This specification covers inorganic fiber-reinforced organic felt, and inorganic fiber-based asphaltic and nonasphaltic felt underlayments for use as underlayment with steep-slope roofing products. The intent of this specification is to provide criteria for producing and evaluating underlayments with a significantly reduced tendency to wrinkle before or after the installation of steep roofing products. Materials shall be sampled and tested suitably to examine their conformance with performance requirements such as tear strength, pliability, behavior on heating, liquid water transmission, dimensional stability at low to high humidity conditions, and elongation.
SCOPE
1.1 This specification covers (1) inorganic fiber-reinforced organic felt underlayment and (2) inorganic fiber-based felt for use as underlayment with steep-slope roofing products. The intent of this specification is to provide criteria for producing and evaluating underlayments with a significantly reduced tendency to wrinkle before or after the installation of steep roofing products.  
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 The following safety hazards caveat pertains only to the test method portion, Section 8, of this specification: 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, health, and environmental practices and determine the applicability of regulatory requirements prior to use.  
1.4 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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2018
• ICS: 91.060.20 - Roofs
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.02 - Steep Roofing Products and Assemblies

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D6757/D6757M − 18
Standard Specification for
Underlayment Felt Containing Inorganic Fibers Used in
1
Steep-Slope Roofing
This standard is issued under the fixed designation D6757/D6757M; 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.
1. Scope D228/D228M Test Methods for Sampling, Testing, and
Analysis of Asphalt Roll Roofing, Cap Sheets, and
1.1 This specification covers (1) inorganic fiber-reinforced
Shingles Used in Roofing and Waterproofing
organic felt underlayment and (2) inorganic fiber-based felt for
D1079 Terminology Relating to Roofing and Waterproofing
use as underlayment with steep-slope roofing products. The
D4869/D4869M Specification for Asphalt-Saturated Or-
intent of this specification is to provide criteria for producing
ganic Felt Underlayment Used in Steep Slope Roofing
and evaluating underlayments with a significantly reduced
F1087 Test Method for Linear Dimensional Stability of a
tendency to wrinkle before or after the installation of steep
Gasket Material to Moisture
roofing products.
1.2 The values stated in either SI units or inch-pound units
3. Terminology
are to be regarded separately as standard. The values stated in
3.1 Definitions—For definitions of terms used in this
each system may not be exact equivalents; therefore, each
specification, refer to Terminology D1079.
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
4. Classification
with the standard.
4.1 Organic felts that are reinforced with inorganic fibers are
1.3 The following safety hazards caveat pertains only to the
covered by this specification.
test method portion, Section 8, of this specification: This
4.2 Inorganic fiber-based asphaltic and nonasphaltic felts
standard does not purport to address all of the safety concerns,
are covered by this specification.
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety, health, and
5. Materials and Manufacture
environmental practices and determine the applicability of
5.1 In the process of manufacture, a single thickness of
regulatory requirements prior to use.
inorganic mat or organic felt that is reinforced with inorganic
1.4 This international standard was developed in accor-
fibers shall be uniformly saturated or coated.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
6. Physical Requirements
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
6.1 The material shall conform to the physical requirements
Barriers to Trade (TBT) Committee.
prescribed in Table 1.
6.2 The finished product shall not crack nor be so sticky as
2. Referenced Documents
to cause tearing or other damage upon being unrolled at
2
2.1 ASTM Standards:
temperatures between –1 and 60°C [30 and 140°F]. The
D146/D146M Test Methods for Sampling and Testing
finished product shall pass the water shower exposure test in
Bitumen-Saturated Felts and Woven Fabrics for Roofing
accordance with 8.1.4, indicating resistance to liquid water
and Waterproofing
transmission.
1
This specification is under the jurisdiction of ASTM Committee D08 on
7. Dimensions, Masses, Workmanship, Finish, and
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02
Appearance
on Steep Roofing Products and Assemblies.
Current edition approved May 1, 2018. Published May 2018. Originally
7.1 Dimensions and masses to be agreed upon between
approved in 2002. Last previous edition approved in 2016 as D6757/D6757M – 16a.
buyer and seller.
DOI: 10.1520/D6757_D6757M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.2 The finished material shall be free of visible external
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
defects, such as holes, ragged or untrue edges, breaks, cracks,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tears, bulges, and indentations.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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D6757/D6757M − 18
TABLE 1 Physical Requirements
8.2.3.1 Low humidity to high humidity:
Tear strength, min at 23 ± 2°C, 4.0, [0.88] (in any
L 2 L
h l
[73 ± 4°F], N, [lbf] direction)
ΔL 5 3 100 (1)
%
L
Pliability at 23 ± 2°C, [73 ± 4°F], the ten pass
l
strips tested shall not crack when
where:
bent 90°
...

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: D6757/D6757M − 16a D6757/D6757M − 18
Standard Specification for
Underlayment Felt Containing Inorganic Fibers Used in
1
Steep-Slope Roofing
This standard is issued under the fixed designation D6757/D6757M; 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.
1. Scope
1.1 This specification covers (1) inorganic fiber-reinforced organic felt underlayment and (2) inorganic fiber-based felt for use
as underlayment with steep-slope roofing products. The intent of this specification is to provide criteria for producing and
evaluating underlayments with a significantly reduced tendency to wrinkle before or after the installation of steep roofing products.
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 The following safety hazards caveat pertains only to the test method portion, Section 8, of this specification: 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 safety, health, and healthenvironmental practices and determine the applicability of
regulatory requirements prior to use.
1.4 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D146/D146M Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for Roofing and
Waterproofing
D228/D228M 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
D4869/D4869M Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing
F1087 Test Method for Linear Dimensional Stability of a Gasket Material to Moisture
3. Terminology
3.1 Definitions—For definitions of terms used in this specification, refer to Terminology D1079.
4. Classification
4.1 Organic felts that are reinforced with inorganic fibers are covered by this specification.
4.2 Inorganic fiber-based asphaltic and nonasphaltic felts are covered by this specification.
5. Materials and Manufacture
5.1 In the process of manufacture, a single thickness of inorganic mat or organic felt that is reinforced with inorganic fibers shall
be uniformly saturated or coated.
1
This specification is under the jurisdiction of ASTM Committee D08 on Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02 on Steep
Roofing Products and Assemblies.
Current edition approved July 1, 2016May 1, 2018. Published July 2016May 2018. Originally approved in 2002. Last previous edition approved in 2016 as
D6757/D6757M – 16.D6757/D6757M – 16a. DOI: 10.1520/D6757_D6757M-16A.10.1520/D6757_D6757M-18.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. 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

---------------------- Page: 1 ----------------------
D6757/D6757M − 18
6. PerformancePhysical Requirements
6.1 The material shall conform to the physical requirements prescribed in Table 1.
6.2 The finished product shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled at temperatures
between –1 and 60°C [30 and 140°F]. The finished product shall pass the water shower exposure test in accordance with 8.1.4,
indicating resistance to liquid water transmission.
7. Dimensions, Masses, Workmanship, Finish, and Appearance
7.1 Dimensions and masses to be agreed upon between buyer and seller.
7.2 The finished material shall be free of visible external defects, such as holes, ragged or untrue
...