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ASTM D1970/D1970M-19

Historical Revision

Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection

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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

Precision and Bias

8

Inspection

9

Rejection and Rehearing

10

Packaging and Package Marking

11

Keywords

12

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.


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.


SDO ASTM: ASTM International
Document Number D1970
Publication Date Nov. 1, 2019
Language en - English
Page Count 6
Revision Level 19
Supercedes
Committee D08.02
Publish Date Document Id Type View
May 1, 2021 D1970_D1970M-21 Revision
July 15, 2020 D1970_D1970M-20 Revision
Nov. 1, 2019 D1970_D1970M-19 Revision
Nov. 1, 2018 D1970_D1970M-18 Revision
Nov. 1, 2017 D1970_D1970M-17A Revision
May 1, 2017 D1970_D1970M-17 Revision
Nov. 1, 2016 D1970_D1970M-16 Revision
June 15, 2015 D1970_D1970M-15A Revision
Jan. 1, 2015 D1970_D1970M-15 Revision
July 1, 2014 D1970_D1970M-14 Revision
Dec. 15, 2013 D1970_D1970M-13A Revision
June 15, 2013 D1970_D1970M-13 Revision
June 15, 2011 D1970_D1970M-11 Revision