ASTM C755-20
Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation

Standard No.

ASTM C755-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM C755-20

Scope

1.1 This practice outlines factors to be considered, describes design principles and procedures for water vapor retarder selection, and defines water vapor transmission values appropriate for established criteria. It is intended for the guidance of design engineers in preparing vapor retarder application specifications for control of water vapor flow through thermal insulation. It covers commercial and residential building construction and industrial applications in the service temperature range from −40 to +150°F (−40 to +66°C). Emphasis is placed on the control of moisture penetration by choice of the most suitable components of the system. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 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. 1.4 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.

ASTM C755-20 Referenced Document

• ASTM C1136 Standard Specification for Flexible, Low Permeance Vapor Retarders for Thermal Insulation
• ASTM C168 Standard Terminology Relating to Thermal Insulation*， 2022-05-01 Update
• ASTM C647 Standard Guide to Properties and Tests of Mastics and Coating Finishes for Thermal Insulation
• ASTM C921 Standard Practice for Determining the Properties of Jacketing Materials for Thermal Insulation
• ASTM E96/E96M Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials*， 2024-03-01 Update

ASTM C755-20 history

• 2020 ASTM C755-20 Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2019 ASTM C755-19b Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2019 ASTM C755-19a Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2019 ASTM C755-19 Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2015 ASTM C755-10(2015)e1 Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2010 ASTM C755-10(2015) Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2010 ASTM C755-10e1 Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2010 ASTM C755-10 Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2003 ASTM C755-03 Standard Practice for Selection of Water Vapor Retarders for Thermal Insulation
• 2002 ASTM C755-02 Standard Practice for Selection of Vapor Retarders for Thermal Insulation
• 1997 ASTM C755-97 Standard Practice for Selection of Vapor Retarders for Thermal Insulation
• 1990 ASTM C755-85(1990) Standard Practice for Selection of Vapor Retarders for Thermal Insulation