ASTM C1373/C1373M-11
(Practice)Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions
Standard Practice for Determination of Thermal Resistance of Attic Insulation Systems Under Simulated Winter Conditions
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 may range 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 may be 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 may be 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 C 549, C 665, C 739, and C 764.
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 may 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 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.
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Designation: C1373/C1373M − 11
Standard Practice for
Determination of Thermal Resistance of Attic Insulation
1
Systems Under Simulated Winter Conditions
This standard is issued under the fixed designation C1373/C1373M; 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 1.6 This practice is be used to characterize material behav-
iorundercontrolledsteady-statelaboratoryconditionsintended
1.1 This practice presents a laboratory procedure to deter-
to simulate actual temperature conditions of use. The practice
mine the thermal resistance of attic insulation systems under
does not simulate forced air flow conditions.
simulated steady-state winter conditions. The practice applies
onlytoatticinsulationsystemsthatfaceanopenatticairspace. 1.7 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
1.2 The thermal resistance of the insulation is inferred from
each system may not be exact equivalents; therefore, each
calculations based on measurements on a ceiling system
system shall be used independently of the other. Combining
consisting of components consistent with the system being
values from the two systems may result in non-conformance
studied. For example, such a system might consist of a gypsum
with the standard.
board or plywood ceiling, wood ceiling joists, and attic
1.7.1 All values shall be reported in both SI and inch-pound
insulation with its top exposed to an open air space. The
units unless specified otherwise by the client.
temperature applied to the gypsum board or plywood shall be
1.8 This standard does not purport to address all of the
in the range of 18 to 24°C [64 to 75°F]. The air temperature
safety concerns, if any, associated with its use. It is the
above the insulation shall correspond to winter conditions and
responsibility of the user of this standard to establish appro-
ranges from –46°C to 10°C [–51 to 50°F]. The gypsum board
priate safety and health practices and determine the applica-
or plywood ceiling shall be sealed to prevent direct airflow
bility of regulatory limitations prior to use.
between the warm and cold sides of the system.
1.3 This practice applies to a wide variety of loose-fill or
2. Referenced Documents
blanket thermal insulation products including fibrous glass,
2
2.1 ASTM Standards:
rock/slag wool, or cellulosic fiber materials; granular types
C167 Test Methods for Thickness and Density of Blanket or
including vermiculite and perlite; pelletized products; and any
Batt Thermal Insulations
other insulation material that is installed pneumatically or
C168 Terminology Relating to Thermal Insulation
poured in place. The practice considers the effects on heat
C177 Test Method for Steady-State Heat Flux Measure-
transfer of structures, specifically the ceiling joists, substrate,
ments and Thermal Transmission Properties by Means of
for example, gypsum board, air films, and possible facings,
the Guarded-Hot-Plate Apparatus
films, or other materials that are used in conjunction with the
C518 Test Method for Steady-State Thermal Transmission
insulation.
Properties by Means of the Heat Flow Meter Apparatus
1.4 This practice measures the thermal resistance of the
C520 Test Methods for Density of Granular Loose Fill
attic/ceiling system in which the insulation material has been
Insulations
preconditioned according to the material Specifications C549,
C549 Specification for Perlite Loose Fill Insulation
C665, C739, and C764.
C665 Specification for Mineral-Fiber Blanket Thermal Insu-
lation for Light Frame Construction and Manufactured
1.5 The specimen preparation techniques outlined in this
Housing
standard do not cover the characterization of loose-fill materi-
C687 Practice for Determination of Thermal Resistance of
als intended for enclosed applications.
Loose-Fill Building Insulation
C739 Specification for Cellulosic Fiber Loose-Fill Thermal
Insulation
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal
Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
2
Measurement. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2011. Published December 2011. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1998. Last previous edition approved in 2003 as C1373–03. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C1373_C1373M-11. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocke
...
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:C1373–03 Designation:C1373/C1373M–11
Standard Practice for
Determination of Thermal Resistance of Attic Insulation
1
Systems Under Simulated Winter Conditions
This standard is issued under the fixed designation C1373/C1373M; 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 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[64 to 75°F).75°F]. The air temperature above the insulation shall
correspond to winter conditions and may range ranges from –46°C to 10°C (–51[–51 to 50°F).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 may be 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
may beare 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.
1.6This practice may 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.
1.7All values shall be reported in both SI and inch-pound units unless specified otherwise by the client.
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.
2. Referenced Documents
2
2.1 ASTM Standards:
C167 Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
C168 Terminology Relating to Thermal Insulation
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the
Guarded-Hot-Plate Apparatus
1
This practice is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.30 on Thermal
Measurements.
Current edition approved April 10, 2003. Published May 2003. Originally approved in 1998. Last previous edition approved in 2001 as C1373–01. DOI:
10.1520/C1373-03.on Thermal Measurement.
Current edition approved Nov. 1, 2011. Published December 2011. Originally approved in 1998. Last previous edition approved in 2003 as C
...
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