ASTM D4869/D4869M-15

Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing

ABSTRACT
This specification covers asphalt-saturated organic felt for use as an underlayment in steep slope roofing. The objective of this specification is to provide a finished product that will lie flat and resist wrinkling, puckering, and shrinking when left exposed to the sun, rain, frost, or dew for a period of two weeks after application. In the process of manufacture, a single thickness of organic dry felt shall be uniformly saturated with an asphaltic saturant and the felt shall be produced principally from organic fibers. The surface of the felt shall be uniform and relatively smooth and upon splitting or tearing on the bias, the felt shall appear free of lumps or particles of foreign substances. The material shall conform to the prescribed physical requirements such as tear strength, pliability, loss on heating, liquid water transmission, breaking strength, and dimensional stability, and to the specified dimension and mass requirements such as roll width, roll area, net mass of saturated felt, net mass of desaturated felt, saturation, moisture, and saturating efficiency. The finished product shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled. The following tests shall be taken: (1) determination of saturation percent of felt, (2) determination of resistance to liquid water transmission using water shower exposure test, and (3) test for dimensional stability to low and high humidity. The water shower exposure test for underlayment is illustrated.
SCOPE
1.1 This specification covers asphalt-saturated organic felt for use as an underlayment with steep slope roofing.  
1.2 The objective of this specification is to provide a finished product that will lie flat and resist wrinkling, puckering, and shrinking when left exposed to the sun, rain, frost, or dew for a period of two weeks after application.  
1.3 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.  
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-2014
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.02 - Steep Roofing Products and Assemblies

Relations

• Replaces: ASTM D4869/D4869M-05(2011)e1 - Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing
• Effective Date: 01-Jan-2015
• Replaced By: ASTM D4869/D4869M-16 - Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing
• Effective Date: 01-Jan-2016
• Referred By: ASTM E2556/E2556M-10(2022) - Standard Specification for Vapor Permeable Flexible Sheet Water-Resistive Barriers Intended for Mechanical Attachment
• Effective Date: 01-Jan-2015
• Referred By: ASTM D8257/D8257M-22 - Standard Specification for Mechanically Attached Polymeric Roof Underlayment Used in Steep Slope Roofing
• Effective Date: 01-Jan-2015
• Referred By: ASTM C240-21 - Standard Test Methods for Testing Cellular Glass Insulation Block
• Effective Date: 01-Jan-2015
• Referred By: ASTM D6757/D6757M-18(2023) - Standard Specification for Underlayment Felt Containing Inorganic Fibers Used in Steep-Slope Roofing
• Effective Date: 01-Jan-2015

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:D4869/D4869M −15
StandardSpecification for
Asphalt-Saturated Organic Felt Underlayment Used in Steep
1
Slope Roofing
This standard is issued under the fixed designation D4869/D4869M; 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 D1922 Test Method for Propagation Tear Resistance of
Plastic Film and Thin Sheeting by Pendulum Method
1.1 This specification covers asphalt-saturated organic felt
D6136 Test Method for Kerosine Number of Unsaturated
for use as an underlayment with steep slope roofing.
(Dry) Felt by Vacuum Method
1.2 The objective of this specification is to provide a
F1087 Test Method for Linear Dimensional Stability of a
finished product that will lie flat and resist wrinkling,
Gasket Material to Moisture
puckering, and shrinking when left exposed to the sun, rain,
3. Terminology
frost, or dew for a period of two weeks after application.
1.3 The values stated in either SI units or inch-pound units 3.1 Definitions—For definitions of terms used in this
specification, refer to Terminology D1079.
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each
4. Classification
system shall be used independently of the other. Combining
4.1 Asphalt-saturated felts covered by this specification are
values from the two systems may result in non-conformance
of four types:
with the standard.
4.1.1 Type I—#8 Underlayment,
1.4 The following safety hazards caveat pertains only to the
4.1.2 Type II—#13 Underlayment,
test method portion, Section 8, of this specification: This
4.1.3 Type III—#20 Underlayment, and
standard does not purport to address all of the safety concerns,
4.1.4 Type IV—#26 Underlayment.
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
5. Materials and Manufacture
practices and determine the applicability of regulatory limita-
5.1 In the process of manufacture, a single thickness of
tions prior to use.
organic dry felt shall be uniformly saturated with an asphaltic
saturant.
2. Referenced Documents
2
5.2 The felt shall be produced principally from organic
2.1 ASTM Standards:
fibers. The surface of the felt shall be uniform and relatively
D70 Test Method for Density of Semi-Solid Bituminous
smooth. Upon splitting or tearing on the bias, the felt shall
Materials (Pycnometer Method)
appear free of lumps or particles of foreign substances.
D146 Test Methods for Sampling and Testing Bitumen-
Saturated Felts and Woven Fabrics for Roofing and
6. Physical Requirements
Waterproofing
6.1 The material shall conform to the physical requirements
D228 Test Methods for Sampling, Testing, and Analysis of
in accordance with Table 1 and the dimensions and masses in
Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
accordance with Table 2.
Roofing and Waterproofing
D1079 Terminology Relating to Roofing and Waterproofing
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 0 and 60°C [32 and 140°F].
1
This specification is under the jurisdiction of ASTM Committee D08 on
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.02
6.3 The finished product shall pass the water shower expo-
on Steep Roofing Products and Assemblies.
sure test in accordance with 8.6, indicating resistance to liquid
Current edition approved Jan. 1, 2015. Published February 2015. Originally
ε1
approved in 2002. Last previous edition approved in 2011 as D4869 – 05 (2011) . water transmission.
DOI: 10.1520/D4869_D4869M-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Workmanship, Finish, and Appearance
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.1 The felt shall be thoroughly and uniformly saturated,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. and shall show no unsaturated spots at any point upon cutting
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D4869/D4869M−15
TABLE 1 Physical Requirements
Type I Type II Type III Type IV
Tear strength, 23 ± 2°C [73 ± 4°F] min, N [lbf] 2.0 2.0 4.0 4.0
(both cross and with direction of sheet) [0.45] [0.45] [0.90] [0.90]
Pliability at 23 ± 2°C [73 ± 4°F]. Ten strips 12.7 mm 12.7 mm 19.1 mm 19.1 mm
tested shall not crack when bent 90° at a [0.50 in.] [0.50 in.] [0.75 in.] [0.75 in.]
uniform speed over a rounde
...

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: D4869/D4869M − 05 (Reapproved 2011) D4869/D4869M − 15
Standard Specification for
Asphalt-Saturated Organic Felt Underlayment Used in Steep
1
Slope Roofing
This standard is issued under the fixed designation D4869/D4869M; 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
ε NOTE—Units information was editorially revised in July 2011.
1. Scope
1.1 This specification covers asphalt-saturated organic felt for use as an underlayment with steep slope roofing.
1.2 The objective of this specification is to provide a finished product that will lie flat and resist wrinkling, puckering, and
shrinking when left exposed to the sun, rain, frost, or dew for a period of two weeks after application.
1.3 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.
1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D70 Test Method for Density of Semi-Solid Bituminous Materials (Pycnometer Method)
D146 Test Methods for Sampling and Testing Bitumen-Saturated Felts and Woven Fabrics for 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
D1922 Test Method for Propagation Tear Resistance of Plastic Film and Thin Sheeting by Pendulum Method
D6136 Test Method for Kerosine Number of Unsaturated (Dry) Felt by Vacuum Method
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 Asphalt-saturated felts covered by this specification are of four types:
4.1.1 Type I—#8 Underlayment,
4.1.2 Type II—#13 Underlayment,
4.1.3 Type III—#20 Underlayment, and
4.1.4 Type IV—#26 Underlayment.
5. Materials and Manufacture
5.1 In the process of manufacture, a single thickness of organic dry felt shall be uniformly saturated with an asphaltic saturant.
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, 2011Jan. 1, 2015. Published July 2011February 2015. Originally approved in 2002. Last previous edition approved in 20052011 as
ε1
D4869 – 05 (2011) . DOI: 10.1520/D4869_D4869M-05R11E01.10.1520/D4869_D4869M-15.
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 ----------------------
D4869/D4869M − 15
5.2 The felt shall be produced principally from organic fibers. The surface of the felt shall be uniform and relatively smooth.
Upon splitting or tearing on the bias, the felt shall appear free of lumps or particles of foreign substances.
6. Physical Requirements
6.1 The material shall conform to the physical requirements in accordance with Table 1 and the dimensions and masses in
accordance with Table 2.
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 0 and 60°C [32 and 140°F].
6.3 The finished product shall pass the water shower exposure test in accordance with 8.38.6, indicating resistance to liquid
water transmission.
7. Workmanship, Finish, and Appearance
7.1 The felt shall be thoroughly and uniformly saturated, and shal
...