ASTM D1970/D1970M-21
(Specification)Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection
Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection
ABSTRACT
This specification covers the standards for polymer modified bituminous sheet materials proposed for use as underlayment on roof eaves, or valleys, or both, to prevent leakage of shingle, tile or metal roofs from water back-up due to ice dams. The underlayment sheet shall comply with the physical requirements which include thickness, maximum load, elongation, adhesion to plywood, thermal stability, flexibility, tear resistance, moisture vapor permeance, sealability, and slip resistance. The underlayment sheet shall not crack, as well, nor be too sticky as to cause damage upon being unrolled.
SCOPE
1.1 This specification covers polymer modified bituminous sheet materials intended for use as underlayment on roof eaves, or valleys, or both, to prevent leakage of shingle, tile, or metal roofs from water back-up due to ice dams.
1.2 These underlayment sheets have a sticky adhesive layer which is exposed by removal of a protective sheet. The top surface is suitable to work on during the application of the exposed roofing.
1.3 Table of Contents:
Section
Scope
1
Referenced Documents
2
Terminology
3
Workmanship, Finish, and Appearance
4
Physical Requirements
5
Sampling
6
Test Methods
7
Conditioning
7.1
Thickness
7.2
Maximum Load and Elongation at Break
7.3
Adhesion to Plywood
7.4
Thermal Stability
7.5
Flexibility at –29 °C [–20 °F]
7.6
Tear Resistance
7.7
Moisture Vapor Permeability
7.8
Capability to Seal Around Nail
(Head of Water Test)
7.9
Waterproof Integrity of Side Lap Seam
(Head of Water Test)
7.10
Inspection
8
Rejection and Rehearing
9
Packaging and Package Marking
10
Keywords
11
1.4 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 nonconformance with the standard.
1.5 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 limitations prior to use.
1.6 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.
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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:D1970/D1970M −21
Standard Specification for
Self-Adhering Polymer Modified Bituminous Sheet Materials
Used as Steep Roofing Underlayment for Ice Dam
1
Protection
This standard is issued under the fixed designation D1970/D1970M; 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 1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This specification covers polymer modified bituminous
responsibility of the user of this standard to establish appro-
sheetmaterialsintendedforuseasunderlaymentonroofeaves,
priate safety, health, and environmental practices and deter-
or valleys, or both, to prevent leakage of shingle, tile, or metal
mine the applicability of regulatory limitations prior to use.
roofs from water back-up due to ice dams.
1.6 This international standard was developed in accor-
1.2 These underlayment sheets have a sticky adhesive layer
dance with internationally recognized principles on standard-
which is exposed by removal of a protective sheet. The top
ization established in the Decision on Principles for the
surface is suitable to work on during the application of the
Development of International Standards, Guides and Recom-
exposed roofing.
mendations issued by the World Trade Organization Technical
1.3 Table of Contents: Barriers to Trade (TBT) Committee.
Section
2. Referenced Documents
Scope 1
Referenced Documents 2
2
2.1 ASTM Standards:
Terminology 3
Workmanship, Finish, and Appearance 4 D228/D228MTest Methods for Sampling, Testing, and
Physical Requirements 5
Analysis of Asphalt Roll Roofing, Cap Sheets, and
Sampling 6
Shingles Used in Roofing and Waterproofing
Test Methods 7
Conditioning 7.1 D903Test Method for Peel or Stripping Strength of Adhe-
Thickness 7.2
sive Bonds
Maximum Load and Elongation at Break 7.3
D1079Terminology Relating to Roofing and Waterproofing
Adhesion to Plywood 7.4
Thermal Stability 7.5
D1204Test Method for Linear Dimensional Changes of
Flexibility at –29 °C [–20 °F] 7.6
Nonrigid Thermoplastic Sheeting or Film at Elevated
Tear Resistance 7.7
Temperature
Moisture Vapor Permeability 7.8
Capability to Seal Around Nail 7.9 D4073/D4073MTest Method for Tensile-Tear Strength of
(Head of Water Test)
Bituminous Roofing Membranes
Waterproof Integrity of Side Lap Seam 7.10
D5147/D5147MTest Methods for Sampling and Testing
(Head of Water Test)
Inspection 8
Modified Bituminous Sheet Material
Rejection and Rehearing 9
D7349/D7349MTest Method for Determining the Capabil-
Packaging and Package Marking 10
ity of Roofing and Waterproofing Materials to Seal
Keywords 11
Around Fasteners
1.4 The values stated in either SI units or inch-pound units
E96/E96MTest Methods for Water Vapor Transmission of
are to be regarded separately as standard. The values stated in
Materials
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
3. Terminology
values from the two systems may result in nonconformance
3.1 Definitions—For definitions of terms used in this
with the standard.
specification, refer to Terminology D1079.
1
This specification is under the jurisdiction of ASTM Committee D08 on
RoofingandWaterproofingandisthedirectresponsibilityofSubcommitteeD08.02
2
on Steep Roofing Products and Assemblies. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2021. Published June 2021. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1990. Last previous edition approved in 2020 as D1970/D1970M–20. Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D1970_D1970M-21. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D1970/D1970M−21
3.2 Definitions of Terms Specific to This Standard: 7. Test Methods
3.2.1 lot—for the purpose of sampling, a lot shall consist of
7.1 Conditioning:
all material manufactured in one production run (not to exceed
7.1.1 Unless otherwise specified, condition test specimens
24 h) using the same source of raw materials.
for at least4hat23 6 2°C [73.4 6 3.6°F] and 50 65%
relative humidity prior to testing.
4. Workmanship, Finish, and Appearance
7.2 Thickness:
4.1 The underlayment sheet shall be supplied in roll form.
7.2.
...
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: D1970/D1970M − 20 D1970/D1970M − 21
Standard Specification for
Self-Adhering Polymer Modified Bituminous Sheet Materials
Used as Steep Roofing Underlayment for Ice Dam
1
Protection
This standard is issued under the fixed designation D1970/D1970M; 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 polymer modified bituminous sheet materials intended for use as underlayment on roof eaves, or
valleys, or both, to prevent leakage of shingle, tile, or metal roofs from water back-up due to ice dams.
1.2 These underlayment sheets have a sticky adhesive layer which is exposed by removal of a protective sheet. The top surface
is suitable to work on during the application of the exposed roofing.
1.3 Table of Contents:
Section
Scope 1
Referenced Documents 2
Terminology 3
Workmanship, Finish, and Appearance 4
Physical Requirements 5
Sampling 6
Test Methods 7
Conditioning 7.1
Thickness 7.2
Maximum Load and Elongation at Break 7.3
Adhesion to Plywood 7.4
Thermal Stability 7.5
Flexibility at –29 °C [–20 °F] 7.6
Tear Resistance 7.7
Moisture Vapor Permeability 7.8
Capability to Seal Around Nail 7.9
(Head of Water Test)
Waterproof Integrity of Side Lap Seam 7.10
(Head of Water Test)
Inspection 8
Rejection and Rehearing 9
Packaging and Package Marking 10
Keywords 11
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
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 15, 2020May 1, 2021. Published July 2020June 2021. Originally approved in 1990. Last previous edition approved in 20192020 as
D1970/D1970M – 19.D1970/D1970M – 20. DOI: 10.1520/D1970_D1970M-20.10.1520/D1970_D1970M-21.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D1970/D1970M − 21
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 nonconformance with the standard.
1.5 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 limitations prior to use.
1.6 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:
D228/D228M Test Methods for Sampling, Testing, and Analysis of Asphalt Roll Roofing, Cap Sheets, and Shingles Used in
Roofing and Waterproofing
D903 Test Method for Peel or Stripping Strength of Adhesive Bonds
D1079 Terminology Relating to Roofing and Waterproofing
D1204 Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature
D2523/D2523M Practice for Testing Load-Strain Properties of Roofing Membranes
D4073/D4073M Test Method for Tensile-Tear Strength of Bituminous Roofing Membranes
D5147/D5147M Test Methods for Sampling and Testing Modified Bituminous Sheet Material
D7349/D7349M Test Method for Determining the Capability of Roofing and Waterproofing Materials to Seal Around Fasteners
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 manufactured in one production run (not to exceed 24
h) using the same source of raw materials.
4. Workmanship, Finish, and Appearance
4.1 The underlayment sheet shall be supplied in roll form.
4.2 The underlayment sheet shall be substantially uniform in thickness and appearance. It shall be free of visible defects such as
holes, ra
...
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