ASTM C1373/C1373M-11(2017)
Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions

Standard No.

ASTM C1373/C1373M-11(2017)

Release Date

2017

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM C1373/C1373M-23

Latest

ASTM C1373/C1373M-23

Scope

1.1 This practice presents a laboratory procedure to determine the thermal resistance of attic insulation systems under simulated steady-state winter conditions. The practice applies only to attic insulation systems that face an open attic air space. 1.2 The thermal resistance of the insulation is inferred from calculations based on measurements on a ceiling system consisting of components consistent with the system being studied. For example, such a system might consist of a gypsum board or plywood ceiling, wood ceiling joists, and attic insulation with its top exposed to an open air space. The temperature applied to the gypsum board or plywood shall be in the range of 18 to 24°C [64 to 75°F]. The air temperature above the insulation shall correspond to winter conditions and ranges from –46°C to 10°C [–51 to 50°F]. The gypsum board or plywood ceiling shall be sealed to prevent direct airflow between the warm and cold sides of the system. 1.3 This practice applies to a wide variety of loose-fill or blanket thermal insulation products including fibrous glass, rock/slag wool, or cellulosic fiber materials; granular types including vermiculite and perlite; pelletized products; and any other insulation material that is installed pneumatically or poured in place. The practice considers the effects on heat transfer of structures, specifically the ceiling joists, substrate, for example, gypsum board, air films, and possible facings, films, or other materials that are used in conjunction with the insulation. 1.4 This practice measures the thermal resistance of the attic/ceiling system in which the insulation material has been preconditioned according to the material Specifications C549, C665, C739, and C764. 1.5 The specimen preparation techniques outlined in this standard do not cover the characterization of loose-fill materials intended for enclosed applications. 1.6 This practice is be used to characterize material behavior under controlled steady-state laboratory conditions intended to simulate actual temperature conditions of use. The practice does not simulate forced air flow conditions. 1.7 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. 1.7.1 All values shall be reported in both SI and inch-pound units unless specified otherwise by the client. 1.8 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. 1.9 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 C1373/C1373M-11(2017) Referenced Document

• ASTM C1045 Standard Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
• ASTM C1058 Standard Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation
• ASTM C1114 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus*， 2019-03-01 Update
• ASTM C1363 Standard Test Method for the Thermal Performance of Building Assemblies by Means of a Hot Box Apparatus
• ASTM C167 Standard Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
• ASTM C168 Standard Terminology Relating to Thermal Insulation*， 2022-05-01 Update
• ASTM C177 Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus
• ASTM C518 Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
• ASTM C520 Standard Test Methods for Density of Granular Loose Fill Insulations
• ASTM C549 Standard Specification for Perlite Loose Fill Insulation
• ASTM C665 Standard Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing
• ASTM C687 Standard Practice for Determination of Thermal Resistance of Loose-Fill Building Insulation
• ASTM C739 Standard Specification for Cellulose Fiber (Wood-Base) Loose-Fill Thermal Insulation
• ASTM C764 Standard Specification for Mineral Fiber Loose-Fill Thermal Insulation

ASTM C1373/C1373M-11(2017) history

• 2023 ASTM C1373/C1373M-23 Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions
• 2017 ASTM C1373/C1373M-11(2017) Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions
• 2011 ASTM C1373/C1373M-11 Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions
• 2003 ASTM C1373-03 Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions
• 2001 ASTM C1373-01 Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions
• 1998 ASTM C1373-98 Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions