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ASTM E970-07

(Test Method)

Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source

Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source

SIGNIFICANCE AND USE
This fire-test-response standard is designed to provide a basis for estimating one aspect of the fire exposure behavior to exposed insulation installed on the floors of building attics. The test environment is intended to simulate conditions that have been observed and defined in full-scale attic experiments.
The test is intended to be suitable for regulatory statutes, specification acceptance, design purposes, or development and research.  
The fundamental assumption inherent in the test is that critical radiant flux is one measure of the surface burning characteristics of exposed insulation on floors or between joists of attics.
The test is applicable to attic floor insulation specimens that follow or simulate accepted installation practice.
In this procedure, the specimens are subjected to one or more specific sets of laboratory fire test exposure conditions. If different test conditions are substituted or the anticipated end-use conditions are changed, caution should be used to predict changes in the performance characteristics measured by or from this test. Therefore, the results are strictly valid only for the fire test exposure conditions described in this procedure.
5.5.1 If the test results obtained by this test method are to be considered in the total assessment of fire hazard in a building structure, then all pertinent established criteria for fire hazard assessment developed by Committee E-5 must be included in the consideration.
SCOPE
1.1 This fire-test-response standard describes a procedure for measuring the critical radiant flux of exposed attic floor insulation subjected to a flaming ignition source in a graded radiant heat energy environment in a test chamber. The specimen is any attic floor insulation. This test method is not applicable to those insulations that melt or shrink away when exposed to the radiant heat energy environment or the pilot burner.
1.2 This fire-test-response standard measures the critical radiant flux at the point at which the flame advances the farthest. It provides a basis for estimating one aspect of fire exposure behavior for exposed attic floor insulation. The imposed radiant flux simulates the thermal radiation levels likely to impinge on the floors of attics whose upper surfaces are heated by the sun through the roof or by flames from an incidental fire in the attic. This fire-test-response standard was developed to simulate an important fire exposure component of fires that develop in attics, but is not intended for use in estimating flame spread behavior of insulation installed other than on the attic floor.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
1.4 The text of this standard references notes and footnotes that provide explanatory information. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of this standard.
1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.
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.
1.6 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.

General Information

Status
Historical
Publication Date
30-Jun-2007
ICS
91.120.10 - Thermal insulation of buildings
Technical Committee
E05 - Fire Standards
Drafting Committee
E05.22 - Surface Burning
Current Stage
Ref Project

Relations

Replaces
ASTM E970-00 - Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source
Effective Date
01-Jul-2007
Replaced By
ASTM E970-08 - Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source
Effective Date
01-Oct-2008
Referred By
ASTM C665-23 - Standard Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing
Effective Date
01-Jul-2007
Referred By
ASTM C739-21a - Standard Specification for Cellulosic Fiber Loose-Fill Thermal Insulation
Effective Date
01-Jul-2007
Referred By
ASTM E176-21ae1 - Standard Terminology of Fire Standards
Effective Date
01-Jul-2007
Referred By
ASTM E1317-19 - Standard Test Method for Flammability of Surface Finishes
Effective Date
01-Jul-2007
Referred By
ASTM E1321-18 - Standard Test Method for Determining Material Ignition and Flame Spread Properties
Effective Date
01-Jul-2007
Referred By
ASTM C1497-16 - Standard Specification for Cellulosic Fiber Stabilized Thermal Insulation
Effective Date
01-Jul-2007
Referred By
ASTM C764-19 - Standard Specification for Mineral Fiber Loose-Fill Thermal Insulation
Effective Date
01-Jul-2007

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ASTM E970-07 - Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy SourceASTM E970-07 - Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source
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ASTM E970-07 - Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
An American National Standard
Designation: E 970 – 07
Standard Test Method for
Critical Radiant Flux of Exposed Attic Floor Insulation Using
1
a Radiant Heat Energy Source
This standard is issued under the fixed designation E 970; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This fire-test-response standard describes a procedure
1.7 The text of this standard references notes and footnotes
for measuring the critical radiant flux of exposed attic floor
which provide explanatory material. These notes and footnotes
insulation subjected to a flaming ignition source in a graded
(excluding those in tables and figures) shall not be considered
radiant heat energy environment in a test chamber. The
as requirements of the standard.
specimen is any attic floor insulation. This test method is not
applicable to those insulations that melt or shrink away when
2. Referenced Documents
exposed to the radiant heat energy environment or the pilot
2
2.1 ASTM Standards:
burner.
C 665 Specification for Mineral-Fiber Blanket Thermal In-
1.2 This fire-test-response standard measures the critical
sulation for Light Frame Construction and Manufactured
radiant flux at the point at which the flame advances the
Housing
farthest. It provides a basis for estimating one aspect of fire
C 764 Specification for Mineral Fiber Loose-Fill Thermal
exposure behavior for exposed attic floor insulation. The
Insulation
imposed radiant flux simulates the thermal radiation levels
E84 Test Method for Surface Burning Characteristics of
likely to impinge on the floors of attics whose upper surfaces
Building Materials
are heated by the sun through the roof or by flames from an
E 122 Practice for Calculating Sample Size to Estimate,
incidental fire in the attic. This fire-test-response standard was
With a Specified Tolerable Error, the Average for a
developedtosimulateanimportantfireexposurecomponentof
Characteristic of a Lot or Process
fires that develop in attics, but is not intended for use in
E 176 Terminology of Fire Standards
estimating flame spread behavior of insulation installed other
E 631 Terminology of Building Constructions
than on the attic floor.
E 648 Test Method for Critical Radiant Flux of Floor-
1.3 The values stated in SI units are to be regarded as
Covering Systems Using a Radiant Heat Energy Source
standard. The values given in parentheses are for information
2.2 Federal Specifications:
only.
HH-I-515 Insulation Thermal (Loose Fill for Pneumatic or
1.4 The text of this standard references notes and footnotes
3
Poured Application), Cellulosic or Wood Fiber
that provide explanatory information. These notes and foot-
HH-I-521, Insulation Blankets, Thermal (Mineral Fiber, for
notes, excluding those in tables and figures, shall not be
3
Ambient Temperature)
considered as requirements of this standard.
HH-I-1030 Insulation, Thermal (Mineral Fiber, for Pneu-
1.5 This standard is used to measure and describe the
3
matic or Poured Application)
response of materials, products, or assemblies to heat and
flame under controlled conditions, but does not by itself
3. Terminology
incorporate all factors required for fire hazard or fire risk
3.1 For definitions of terms used in this test method and
assessment of the materials, products, or assemblies under
associated with fire issues refer to the terminology contained in
actual fire conditions.
Terminology E 176.
1.6 This standard does not purport to address all of the
3.2 Definition:
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
1
This test method is under the jurisdiction of ASTM Committee E05 on Fire Standards volume information, refer to the standard’s Document Summary page on
Standards and is the direct responsibility of Subcommittee E05.22 on Surface the ASTM website.
3
Burning. Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
Current edition approved July 1, 2007. Published August 2007. Originally Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
approved in 1983. Last previous edition approved in 2000 as E 970 – 00. www.dodssp.daps.mil.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
E970–07
3.2.1 attic, n—an
...

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ASTM E970-23(Test Method)
Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source

SIGNIFICANCE AND USE
5.1 This fire-test-response standard is designed to provide a basis for estimating one aspect of the fire exposure behavior to exposed insulation installed on the floors of building attics. The test environment is intended to simulate conditions that have been observed and defined in full-scale attic experiments.  
5.2 The test is intended to be suitable for regulatory statutes, specification acceptance, design purposes, or development and research.  
5.3 The fundamental assumption inherent in the test is that critical radiant flux is one measure of the surface burning characteristics of exposed insulation on floors or between joists of attics.  
5.4 The test is applicable to attic floor insulation specimens that follow or simulate accepted installation practice.  
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1.1 This fire-test-response standard describes a procedure for measuring the critical radiant flux of exposed attic floor insulation subjected to a flaming ignition source in a graded radiant heat energy environment in a test chamber. The specimen is any attic floor insulation. This test method is not applicable to those insulations that melt or shrink away when exposed to the radiant heat energy environment or the pilot burner.  
1.2 This fire-test-response standard measures the critical radiant flux at the point at which the flame advances the farthest. It provides a basis for estimating one aspect of fire exposure behavior for exposed attic floor insulation. The imposed radiant flux simulates the thermal radiation levels likely to impinge on the floors of attics whose upper surfaces are heated by the sun through the roof or by flames from an incidental fire in the attic. This fire-test-response standard was developed to simulate an important fire exposure component of fires that develop in attics, but is not intended for use in estimating flame spread behavior of insulation installed other than on the attic floor.  
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.  
1.4 The text of this standard references notes and footnotes that provide explanatory information. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of this standard.  
1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.  
1.6 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.  
1.7 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
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ASTM E970-23(Test Method)
Standard Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source

SIGNIFICANCE AND USE
5.1 This fire-test-response standard is designed to provide a basis for estimating one aspect of the fire exposure behavior to exposed insulation installed on the floors of building attics. The test environment is intended to simulate conditions that have been observed and defined in full-scale attic experiments.  
5.2 The test is intended to be suitable for regulatory statutes, specification acceptance, design purposes, or development and research.  
5.3 The fundamental assumption inherent in the test is that critical radiant flux is one measure of the surface burning characteristics of exposed insulation on floors or between joists of attics.  
5.4 The test is applicable to attic floor insulation specimens that follow or simulate accepted installation practice.  
5.5 In this procedure, the specimens are subjected to one or more specific sets of laboratory fire test exposure conditions. If different test conditions are substituted or the anticipated end-use conditions are changed, caution should be used to predict changes in the performance characteristics measured by or from this test. Therefore, the results are strictly valid only for the fire test exposure conditions described in this procedure.  
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1.1 This fire-test-response standard describes a procedure for measuring the critical radiant flux of exposed attic floor insulation subjected to a flaming ignition source in a graded radiant heat energy environment in a test chamber. The specimen is any attic floor insulation. This test method is not applicable to those insulations that melt or shrink away when exposed to the radiant heat energy environment or the pilot burner.  
1.2 This fire-test-response standard measures the critical radiant flux at the point at which the flame advances the farthest. It provides a basis for estimating one aspect of fire exposure behavior for exposed attic floor insulation. The imposed radiant flux simulates the thermal radiation levels likely to impinge on the floors of attics whose upper surfaces are heated by the sun through the roof or by flames from an incidental fire in the attic. This fire-test-response standard was developed to simulate an important fire exposure component of fires that develop in attics, but is not intended for use in estimating flame spread behavior of insulation installed other than on the attic floor.  
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.  
1.4 The text of this standard references notes and footnotes that provide explanatory information. These notes and footnotes, excluding those in tables and figures, shall not be considered as requirements of this standard.  
1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.  
1.6 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.  
1.7 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard.  
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ASTM C1373/C1373M-23(Practice)
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4.1 The thermal resistance of a ceiling system is used to characterize its steady-state thermal performance.  
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FIG. 1 Schematic of Thermal Resistance for a Permeable Attic Insulation Under Simulated Winter Conditions (Heat Flow Up)
Note 1: A constant hot-side temperature (T, hot) is used for both tests and the temperature difference increases as the cold side temperature (T, cold) is decreased. See 5.1.6 for requirements on size of air space.  
4.4 In normal use, the thickness of insulation products ranges from 75 mm [3 in.] to 500 mm [20 in.]. Installed densities will depend upon the product type, the installed thickness, the installa...
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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.  
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4.1 The thermal resistance, R, of an insulation is used to describe its thermal performance.  
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1.1 This practice presents a laboratory guide to determine the thermal resistance of pneumatically installed loose-fill building insulations for enclosed applications of the building thermal envelope behind netting at mean temperatures between –10 and 35°C (14 to 95°F).  
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Standard Guide for Readily Observable Moisture Affected Materials and Conditions Conducive to Elevated Moisture in Commercial Buildings: Limited Moisture Assessment Process

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4.1 Use—This guide is intended for use on a voluntary basis by parties who wish to obtain a limited survey of commercial real estate to assess for readily observable moisture affected materials and physical deficiencies conducive to elevated moisture as part of a commercial real estate transaction or commercial property management. This guide is intended to constitute a limited inquiry using representative observations for the purposes of conducting due diligence regarding the actual and potential presence of readily observable moisture affected materials and physical deficiencies conducive to elevated moisture in connection with the subject property. Inquiries that are more and less comprehensive than this guide (including, in some instances, no inquiry) may be appropriate in some circumstances in the opinion of the user (for example, when the presence of moisture affected materials is known to the user). Furthermore, no implication is intended that a person must use this guide in order to be deemed to have conducted appropriate inquiry in a commercially prudent or reasonable manner in a particular transaction. Nevertheless, this guide is intended to reflect a commercially prudent and reasonable inquiry. However, a LMA is not intended to serve as a comprehensive survey for the presence of readily observable moisture affected materials and physical deficiencies conducive to elevated moisture in all or most of the building systems throughout a commercial building.  
4.2 Clarification of Use:  
4.2.1 Specific Point in Time—Because conditions conducive to elevated moisture in a building can vary greatly over time due to changes in weather, interior air handling and conditioning, occupancy, and so forth, a user should only rely on the results presented in the report for the point in time at which the LMA was conducted.  
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SCOPE
1.1 Purpose—The purpose of this guide2 is to define good commercial practice for conducting a limited survey for readily observable moisture affected materials and conditions conducive to elevated moisture in a commercial building related to commercial real estate transaction or commercial real estate management by conducting: a walk-through survey, document reviews, and interviews as outlined within this guide. This guide is intended to provide a practical means for the limited identification of moisture affected materials and physical deficiencies conducive to elevated moisture caused by water infiltration through the building envelope or substructure or generated within the subject building as a result of processes or mechanical systems, excluding de minimis conditions. This guide is to allow a user to assess general moisture concerns, as well as the potential need for further assessment or other actions that may be appropriate that are beyond the scope of this guide. For purposes of this guide, the initialism “LMA” or “Limited Moisture Assessment” is used interchangeably with this guide’s full title.  
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ASTM C1374-18(2023)(Test Method)
Standard Test Method for Determination of Installed Thickness of Pneumatically Applied Loose-Fill Building Insulation

SIGNIFICANCE AND USE
5.1 This test method was designed to give the manufacturer of loose-fill insulation products a way of determining what the initial installed thickness should be in a horizontal open attic for pneumatic applications.  
5.2 The installed thickness value developed by this test method is intended to provide guidance to the installer in order to achieve a minimum mass/unit area for a given R-value.  
5.3 For the purpose of product design, testing should be done at a variety of R-values. At least three R-values should be used: the lowest R-value on the product label, the highest R-value on the product label, and an R-value near the midpoint of the R-value range.
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1.1 This test method covers determination of the installed thickness of pneumatically applied loose-fill building insulations prior to settling by simulating an open attic with horizontal blown applications.  
1.2 This test method is a laboratory procedure for use by manufacturers of loose-fill insulation for product design, label development, and quality control testing. The apparatus used produces installed thickness results at a given mass/unit area.  
1.3 This test method is not the same as the design density procedures described in Test Methods C520 or Specifications C739 or C764.  
1.4 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.  
1.5 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.

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ASTM
ASTM C1594-23(Specification)
Standard Specification for Polyimide Rigid Cellular Thermal Insulation

ABSTRACT
This specification establishes the composition and physical properties of rigid polyimide cellular foams intended for use as thermal and sound-isolating insulation in commercial and industrial environments. The polyimide insulations covered are classified into three types (Types I, II, and III) according to closed cell content, and into four grades (Grades 1, 2, 3, and 4) according to density. Type II insulation is further divided into two classes (Classes 1 and 2) according to upper temperature limits. Materials shall be manufactured from the appropriate monomers and necessary ingredients. Specimens shall be sampled, tested, and conform accordingly to the following physical property requirements: apparent thermal conductivity; water and gas permeability; density; percent closed cell; upper temperature limit; high temperature stability; compressive strength; compressive force deflection; water vapor transmission; steam aging characteristics (tensile strength, dimensional and weight changes), corrosiveness; chemical resistance; vertical burn characteristics (flame application and time, burn length, and dripping); specific optical smoke density for both flaming and non-flaming exposures; toxic smoke generation; surface burning characteristics (flame spread and smoke developed indices); combustion by-products (carbon monoxide, hydrogen fluoride, hydrogen chloride, nitrogen oxides, sulfur dioxide, and hydrogen cyanide); oxygen index, and 14 scale room burn.
SCOPE
1.1 This specification covers the composition and physical properties of polyimide foam insulation with nominal densities from 1.0 lb/ft3 to 8.0 lb/ft3 (16 kg/m3 to 128 kg/m3) and intended for use as thermal and sound-isolating insulation for temperatures from −423°F to +600°F (−253°C to +316°C) in commercial and industrial environments.  
1.1.1 The annex shall apply to this specification for marine applications.  
1.1.2 This standard is designed as a material specification and not a design document.  
1.1.3 The values stated in Table 1 and Table 2 are not to be used as design values. It is the buyer’s responsibility to specify design requirements and obtain supporting documentation from the material supplier.  
* = Not available consult manufacturer for additional information.
NA = Not Applicable
NB = A manufacturer can only claim conformance to this standard to the values reported in this table. The * notes are confidential data to the manufacturers and as such are not considered part of any qualifying requirements for the standard and only tell the user to inquire about that data.  
* = Not available consult manufacturer for additional information.
NA = Not Applicable
NB = A manufacturer can only claim conformance to this standard to the values reported in this table. The * notes are confidential data to the manufacturers and as such are not considered part of any qualifying requirements for the standard and only tell the user to inquire about that data.
Note 1: The subject matter of this material specification is not covered by any other ASTM specification. There is no known ISO standard covering the subject of this standard.  
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 B...

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ASTM
ASTM C1149-23(Specification)
Standard Specification for Self-Supported Spray Applied Cellulosic Thermal Insulation

ABSTRACT
This specification covers self-supported spray applied cellulosic thermal insulation for use as thermal insulation or acoustical absorbent material, or both. The chemically-treated cellulosic materials that are also covered in this specification are used for pneumatic applications operating within a specific temperature range. The materials are classified into two types based on the type of adhesive used and exposure of the application. Specimens for testing should be prepared and tested using the prescribed methods and should conform to the specified values of density, thermal resistance, surface bonding characteristics, adhesive strength, cohesive strength, smoldering combustion, fungi resistance, corrosion, moisture vapor absorption, odor, flame resistance permanency, substrate deflection, and air erosion.
SCOPE
1.1 The specification covers the physical properties of self-supported spray applied cellulosic fibers intended for use as thermal insulation or an acoustical absorbent material, or both.  
1.2 This specification covers chemically treated cellulosic materials intended for pneumatic applications where temperatures do not exceed 82.2°C and where temperatures will routinely remain below 65.6°C.  
1.2.1 Type I—Material applied with liquid adhesive and suitable for either exposed or enclosed applications.  
1.2.2 Type II—Materials containing a dry adhesive that is activated by water during installation and intended only for enclosed or covered applications.  
1.3 This is a material specification only and is not intended to deal with methods of application that are supplied by the manufacturer.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.

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ASTM
ASTM C1058/C1058M-10(2023)(Practice)
Standard Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation

SIGNIFICANCE AND USE
4.1 The various methods for measuring and calculating thermal properties provide data and information for manufacturer's published information, for comparison of related products, and for designers and users to evaluate insulation products for particular applications. For these purposes it is advisable to provide basic data and information produced under standard temperature conditions.  
4.2 It is possible that thermal properties of a specimen will change with mean temperature, with temperature difference across the specimens, and with high temperature exposure. Data and information at standard temperatures are necessary for valid comparison of thermal properties.  
4.3 The mean test temperatures to measure thermal properties shall be selected from those listed in Table 1. It is recommended that thermal properties of insulation materials be evaluated over a mean temperature range that represents the intended end use. For this situation, the lowest and greatest mean temperatures need to be within 10°C of the maximum and minimum mean temperature of interest. The temperature differences for any chosen mean temperature will depend upon both the thermal insulation application (see appropriate materials specification), the method of evaluation, and the limitations of the apparatus. Temperature differences or relevant temperature conditions required by ASTM material specifications shall take precedence over those recommended in this practice. (A) The values in degrees Fahrenheit given in this table are not intended to be exact conversions of those values in degrees Celsius.  
4.3.1 Standard conditions are presented where both surfaces are exposed to fixed ambient temperatures that are typical for testing building constructions, both insulated and uninsulated (Table 2). (A) Thermal transmission properties of panels of various building constructions are thermal transmittance (U), and thermal conductance (C).(B) Celsius temperatures are standard. The values in degrees Fa...
SCOPE
1.1 This practice covers standard mean temperatures for reporting thermal properties of thermal insulations, products, and materials, and of related systems and components, both insulated and uninsulated.  
1.2 Thermal properties shall be determined as a function of temperature by standard test methods. (Test Methods C177, C201, C335/C335M, C518, C745, C1114, C1363, Guide C653, and Practice C687, all in combination with Practice C1045.)  
Note 1: Standard referenced materials are needed to span the temperature range of the tests.  
1.3 This practice recommends standard conditions for use in testing and evaluating thermal properties as a function of temperature by standard test methods.  
1.4 General applications of thermal insulations include:  
1.4.1 Building envelopes,  
1.4.2 Mechanical systems or processes, and  
1.4.3 Building and industrial insulations.  
1.5 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.  
1.6 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.  
1.7 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.

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