ASTM-D8257/D8257M 2020

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D8257/D8257M-20 Standard Specification for Mechanically Attached Polymeric Roof Underlayment Used in Steep Slope Roofing

Published By	Publication Date	Number of Pages
ASTM	2020	4

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Categories: 91.060.20 - Roofs, ASTM

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Description

ASTM D8257/D8257M-20

Historical Standard: Standard Specification for Mechanically Attached Polymeric Roof Underlayment Used in Steep Slope Roofing

ASTM D8257/D8257M

Scope

1.1 This specification addresses mechanically attached polymeric roof underlayment used in steep slope roofing.

1.2 The objective of this specification is to provide a finished product that will be used as a water-shedding underlayment layer on steep sloped roofs prior to and after installation of the primary roof covering.

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 nonconformance with the standard.

1.4 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.

1.5 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.

Keywords

mechanically attached; polymeric roof underlayment; steep slope;

ICS Code

ICS Number Code 91.060.20 (Roofs)

DOI: 10.1520/D8257_D8257M-20

Additional information

Standard Title	D8257/D8257M-20 Standard Specification for Mechanically Attached Polymeric Roof Underlayment Used in Steep Slope Roofing
Published Code	ASTM
Publication Date	2020
Pages Count	4
ICS Codes	91.060.20 - Roofs