ASTM C739-24
(Specification)Standard Specification for Cellulosic Fiber Loose-Fill Thermal Insulation
Standard Specification for Cellulosic Fiber Loose-Fill Thermal Insulation
ABSTRACT
This specification covers the composition and physical requirements of chemically treated, recycled cellulosic fiber loose-fill type thermal insulation for installation in attics or enclosed spaces in housing and other buildings by pneumatic or pouring method. While the products are used in various constructions, they are adaptable primarily, but not exclusively, to wood joists, rafters, and stud constructions. The basic material shall be made from selected paper, paperboard stock, or ground wood stock, excluding contaminated materials, which may reasonably be expected to be retained in the finished product. Suitable chemicals are introduced to provide properties such as flame resistance, processing, and handling characteristics. Products shall be prepared suitably to undergo test methods, for which they should comply with the following physical and chemical property requirements: corrosiveness; critical radiant flux; fungi resistance; moisture vapor sorption; odor emission; smoldering combustion; and thermal resistance.
SCOPE
1.1 This specification covers the composition and physical requirements of chemically treated, recycled cellulosic fiber loose-fill type thermal insulation for use in attics or enclosed spaces in housing, and other framed buildings within the ambient temperature range from −45 to 90°C by pneumatic or pouring application. While products that comply with this specification are used in various constructions, they are adaptable primarily, but not exclusively, to wood joist, rafters, and stud construction.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
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Standards Content (Sample)
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.
Designation: C739 − 24
Standard Specification for
1
Cellulosic Fiber Loose-Fill Thermal Insulation
This standard is issued under the fixed designation C739; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope the Guarded-Hot-Plate Apparatus
C518 Test Method for Steady-State Thermal Transmission
1.1 This specification covers the composition and physical
Properties by Means of the Heat Flow Meter Apparatus
requirements of chemically treated, recycled cellulosic fiber
C687 Practice for Determination of Thermal Resistance of
loose-fill type thermal insulation for use in attics or enclosed
Loose-Fill Building Insulation
spaces in housing, and other framed buildings within the
C1114 Test Method for Steady-State Thermal Transmission
ambient temperature range from −45 to 90°C by pneumatic or
Properties by Means of the Thin-Heater Apparatus
pouring application. While products that comply with this
C1338 Test Method for Determining Fungi Resistance of
specification are used in various constructions, they are adapt-
Insulation Materials and Facings
able primarily, but not exclusively, to wood joist, rafters, and
C1363 Test Method for Thermal Performance of Building
stud construction.
Materials and Envelope Assemblies by Means of a Hot
1.2 The values stated in SI units are to be regarded as
Box Apparatus
standard. No other units of measurement are included in this
C1374 Test Method for Determination of Installed Thick-
standard.
ness of Pneumatically Applied Loose-Fill Building Insu-
1.3 This standard does not purport to address all of the
lation
safety concerns, if any, associated with its use. It is the C1485 Test Method for Critical Radiant Flux of Exposed
responsibility of the user of this standard to establish appro-
Attic Floor Insulation Using an Electric Radiant Heat
priate safety, health, and environmental practices and deter- Energy Source
mine the applicability of regulatory limitations prior to use.
C1630 Guide for Development of Coverage Charts for
1.4 This international standard was developed in accor- Loose-Fill Thermal Building Insulations
dance with internationally recognized principles on standard-
E177 Practice for Use of the Terms Precision and Bias in
ization established in the Decision on Principles for the
ASTM Test Methods
Development of International Standards, Guides and Recom- E691 Practice for Conducting an Interlaboratory Study to
mendations issued by the World Trade Organization Technical
Determine the Precision of a Test Method
Barriers to Trade (TBT) Committee. E970 Test Method for Critical Radiant Flux of Exposed Attic
Floor Insulation Using a Radiant Heat Energy Source
2. Referenced Documents
2
3. Terminology
2.1 ASTM Standards:
B152/B152M Specification for Copper Sheet, Strip, Plate,
3.1 Definitions—For definitions of terms used in this
and Rolled Bar
specification, see Terminology C168.
C168 Terminology Relating to Thermal Insulation
3.2 Definitions of Terms Specific to This Standard:
C177 Test Method for Steady-State Heat Flux Measure-
3.2.1 attic—an enclosed space between the roof and ceiling
ments and Thermal Transmission Properties by Means of
of the occupied part of a building.
3.2.2 critical radiant flux—the level of incident radiant heat
energy on the attic floor insulation system at the most distant
1
This specification is under the jurisdiction of ASTM Committee C16 on
2
flame-out point (W/cm ).
Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on
Blanket and Loose Fill Insulation.
Current edition approved March 1, 2024. Published March 2024. Originally
4. Materials and Manufacture
approved in 1973. Last previous edition approved in 2021 as C739 – 21a. DOI:
10.1520/C0739-24.
4.1 The basic material shall be recycled cellulosic fiber
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
made from selected paper, paperboard stock, or ground wood
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
stock, excluding contaminated materials, which may reason-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ably be expected to be retained in the finished product. Suitable
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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...
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: C739 − 21a C739 − 24
Standard Specification for
1
Cellulosic Fiber Loose-Fill Thermal Insulation
This standard is issued under the fixed designation C739; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers the composition and physical requirements of chemically treated, recycled cellulosic fiber loose-fill
type thermal insulation for use in attics or enclosed spaces in housing, and other framed buildings within the ambient temperature
range from −45 to 90°C by pneumatic or pouring application. While products that comply with this specification are used in
various constructions, they are adaptable primarily, but not exclusively, to wood joist, rafters, and stud construction.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B152/B152M Specification for Copper Sheet, Strip, Plate, and Rolled Bar
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
C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
C687 Practice for Determination of Thermal Resistance of Loose-Fill Building Insulation
C1114 Test Method for Steady-State Thermal Transmission Properties by Means of the Thin-Heater Apparatus
C1338 Test Method for Determining Fungi Resistance of Insulation Materials and Facings
C1363 Test Method for Thermal Performance of Building Materials and Envelope Assemblies by Means of a Hot Box Apparatus
C1374 Test Method for Determination of Installed Thickness of Pneumatically Applied Loose-Fill Building Insulation
C1485 Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using an Electric Radiant Heat Energy Source
C1630 Guide for Development of Coverage Charts for Loose-Fill Thermal Building Insulations
E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
1
This specification is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on Blanket and Loose
Fill Insulation.
Current edition approved Sept. 1, 2021March 1, 2024. Published September 2021March 2024. Originally approved in 1973. Last previous edition approved in 2021 as
C739 – 21.C739 – 21a. DOI: 10.1520/C0739-21A.10.1520/C0739-24.
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 Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C739 − 24
E970 Test Method for Critical Radiant Flux of Exposed Attic Floor Insulation Using a Radiant Heat Energy Source
3. Terminology
3.1 Definitions—For definitions of terms used in this specification, see Terminology C168.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 attic—an enclosed space between the roof and ceiling of the occupied part of a building.
3.2.2 critical radiant flux—the level of incident radiant heat energy on the attic floor insulation system at the most distant flame-out
2
point (W/cm ).
4. Materials and Manufacture
4.1 The basic material shall be recycled cellul
...
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