ASTM C665 - 24 轻型框架结构和预制房屋用矿物纤维毯隔热材料的标准规范
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Designation: C665 −24
Standard Specification for
Mineral-Fiber Blanket Thermal Insulation for Light Frame
Construction and Manufactured Housing
1
This standard is issued under the fixed designation C665; 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
properties of mineral-fiber blanket insulation used to thermally
or acoustically insulate ceilings, floors, and walls in light frame
construction and manufactured housing. The requirements
cover fibrous blankets and facings. Values for water-vapor
permeance of facings are suggested for information that will be
helpful to designers and installers.
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 appro-
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
2
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 Measure-
ments and Thermal Transmission Properties by Means of
the Guarded-Hot-Plate Apparatus
C390 Practice for Sampling and Acceptance of Thermal
Insulation Lots
C518 Test Method for Steady-State Thermal Transmission
Properties by Means of the Heat Flow Meter Apparatus
C653 Guide for Determination of the Thermal Resistance of
Low-Density Blanket-Type Mineral Fiber Insulation
C1104/C1104M Test Method for Determining the Water
Vapor Sorption of Unfaced Mineral Fiber Insulation
C1304 Test Method for Assessing the Odor Emission of
Thermal Insulation Materials
C1338 Test Method for Determining Fungi Resistance of
Insulation Materials and Facings
C1617 Test Method for Quantitative Accelerated Laboratory
Evaluation of Extraction Solutions Containing Ions
Leached from Thermal Insulation on Aqueous Corrosion
of Carbon Steel
C1936 Test Method for Corrosiveness of Mineral-Fiber or
Cellulosic-Fiber Insulation by Comparison to Control
E84 Test Method for Surface Burning Characteristics of
Building Materials
E96/E96M Test Methods for Gravimetric Determination of
Water Vapor Transmission Rate of Materials
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.
4. Classification
4.1 Typical mineral-fiber thermal insulation is classified into
the following types, classes, and categories:
4.1.1 Type I—Blankets without facings.
4.1.2 Type II—Blankets with nonreflective facings.
4.1.2.1 Class A—Facing with a flame spread index of 25 or
less.
(1) Category 1—Facing is a vapor retarder.
(2) Category 2—Facing is not a vapor retarder.
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 Nov. 1, 2024. Published November 2024. Originally
approved in 1970. Last previous edition approved in 2023 as C665 – 23. DOI:
10.1520/C0665-24.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at www.astm.org/contact. 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
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.
1
4.1.2.2 Class B—Facing with a flame propagation resis-
tance; critical radiant flux of 0.12 W/cm
2
(.11 Btu/ft
2
·s) or
greater.
(1) Category 1—Facing is a vapor retarder.
(2) Category 2—Facing is not a vapor retarder.
4.1.2.3 Class C—Facing not rated for flame propagation
resistance (for use in nonexposed applications only).
(1) Category 1—Facing is a vapor retarder.
(2) Category 2—Facing is not a vapor retarder.
4.1.3 Type III—Blankets with reflective facings:
4.1.3.1 Class A—Facing with a flame spread index of 25 or
less.
(1) Category 1—Facing is a vapor retarder.
(2) Category 2—Facing is not a vapor retarder.
4.1.3.2 Class B—Facing with a flame propagation resis-
tance; critical radiant flux of 0.12 W/cm
2
(.11 Btu/ft
2
·s) or
greater.
(1) Category 1—Facing is a vapor retarder.
(2) Category 2—Facing is not a vapor retarder.
4.1.3.3 Class C—Facing not rated for flame propagation
resistance (for use in nonexposed applications only).
(1) Category 1—Facing is a vapor retarder.
(2) Category 2—Facing is not a vapor retarder.
4.2 Mechanically attached field installed facing shall be
classified into Type/Class/Category as follows:
(1) Type I insulation used in conjunction with a field
installed non-reflective facing having a 25 flame spread or less
on both sides is considered functionally equivalent to a Type
II/Class A/Category 1 insulation composite.
(2) Type I insulation used in conjunction with a field-
installed perforated, or vapor breathable, nonreflective facing
having a 25 flame spread or less on both sides is considered
functionally equivalent to Type II/Class A/Category 2 insula-
tion composite.
(3) Type I insulation used in conjunction with a field-
installed reflective facing (reflective side exposed) having a 25
flame spread or less on both sides is considered equivalent to
aType III/Class A/Category 1 insulation composite.
(4) Type I insulation used in conjunction with a field-
installed perforated, or vapor breathable, reflective facing
(reflective side exposed) having a 25 flame spread or less on
both sides is considered functionally equivalent to a Type
III/Class A/Category 2 insulation composite.
5. Ordering Information
5.1 For specific installations, thermal resistance, length,
width, and facing suited to the intended use shall be specified
by the purchaser.
6. Materials and Manufacture
6.1 Basic Material—The basic material shall be fibers made
from mineral substances such as rock, slag, or glass processed
from the molten state into a fibrous form.
6.2 Manufacture—Insulation blankets shall consist of flex-
ible units composed of felted, bonded, or unbonded fibers
formed into rolls or flat cut pieces (batts), with or without
various adhered facings, and with or without a means for
attachment of the blanket to applicable constructions.
7. Physical Properties
7.1 Thermal Resistance—The standard thermal resistance
values in °F · h · ft
2
/Btu (K · m
2
/W) are: 4, 7, 11, 13, 19, 22,
30, and 38 (0.7, 1.2, 1.9, 2.3, 3.3, 3.9, 5.3, and 6.7). Rvalues
other than those listed shall be agreed upon between the
supplier and the purchaser. The product must be produced to
the label Rvalue. The thermal resistance, R, for the average of
any four randomly selected samples shall not be more than 5 %
below the listed Rvalue when tested in accordance with 13.2,
nor shall any single specimen be more than 10 % below the
listed Rvalue.
7.2 Surface Burning Characteristics:
7.2.1 Insulation blankets exclusive of facing, when tested in
accordance with Test Method E84, shall have a flame spread
index no greater than 25, and a smoke developed index no
greater than 50.
7.2.2 Insulation blankets with facings intended for exposed
application, when tested in accordance with Test Method E84,
shall have a flame spread index no greater than 25, and a smoke
developed index no greater than 50.
7.3 Critical Radiant Flux—Insulation blankets, when tested
in accordance with 13.4, shall have a critical radiant flux-flame
propagation resistance ≥0.12 W/cm
2
(0.11 Btu/ft
2
·s). Blankets
with facing on both surfaces, shall be tested on the surface to
be left exposed and shall be marked on either surface.
7.4 Water-Vapor Permeance—When tested in accordance
with 13.5, vapor retardant facings shall have a vapor per-
meance of no more than 1 perm
(5.7 × 10
−11
kg·Pa
−1
·s
−1
·m
–2
) and vapor-permeable facing shall
have a vapor permeance of no less than 5 perm
(2.9 × 10
−10
kg·Pa
−1
·s
−1
·m
−2
).
7.5 Water Vapor Sorption—The water vapor sorption of the
insulation without facing shall be not more than 5 % by weight,
when tested in accordance with 13.6.
7.6 Odor Emission—A detectable odor of strong objection-
able nature recorded by more than two of the five panel
members shall constitute rejection of the material when tested
in accordance with 13.7.
7.7 Corrosiveness:
7.7.1 Copper and Aluminum—When tested in accordance
with 13.8.1, the metal plates in contact with the insulation shall
show no corrosion greater than that observed on the compara-
tive plates in contact with sterile cotton.
7.7.2 Steel—Determine in accordance with 13.8.2.1 or
13.8.2.2.
7.7.2.1 When tested in accordance with 13.8.2.1, the metal
plates in contact with the insulation shall show no corrosion
greater than that observed on the comparative plates in contact
with sterile cotton.
7.7.2.2 When tested in accordance with 13.8.2.2, the mass
loss corrosion rate of the unfaced insulation extract shall not
exceed that of the 5-ppm chloride solution.
NOTE 1—The pass/fail criteria established in 7.7.2.2 is for materials
which claim compliance with Specification C665. The corrosion proce-
dure as detailed in 7.7.1 and 7.7.2.1 is referenced in multiple Mineral
Fiber material standards. The use of the alternative procedure and the
C665 − 24
2
establishment of pass/fail criteria using 7.7.2.2 should be addressed by
each specific material standard.
7.8 Fungi Resistance—When tested in accordance with
13.9, the insulation shall have growth no greater than that
observed on the white birch tongue depressor comparative
item.
8. Other Requirements
8.1 Qualification Requirements—The following require-
ments are generally used for purposes of initial material or
product qualification:
8.1.1 Thermal resistance,
8.1.2 Surface burning characteristics,
8.1.3 Critical radiant flux,
8.1.4 Water-vapor permeance,
8.1.5 Water vapor sorption,
8.1.6 Odor emission,
8.1.7 Corrosiveness, and
8.1.8 Fungi resistance.
8.2 Inspection Requirements—The following requirements
are generally used for purposes of acceptance sampling of lots
or shipments of qualified thermal insulation:
8.2.1 Dimensional tolerances, and
8.2.2 Workmanship.
9. Dimensions
9.1 The material shall conform to the standard dimensions
and tolerances prescribed in Table 1.
10. Workmanship and Finish
10.1 Although all properties of the insulation blanket are not
presented in this specification, it is understood that the insula-
tion will essentially be free of defects that adversely affect
thermal performance, such as local compressed areas, low
density areas, tears and holes.
10.2 Although the general properties of the facings and
means for attachment are not included in this specification,
they are presumed to be free of excessive tears, rips, holes, and
other defects that will adversely affect their performance.
11. Significance and Use
11.1 This specification applies to products that are used in
buildings. While products that comply with this specification
are used in various constructions, they are adaptable primarily,
but not exclusively, to wood frame construction.
11.2 Since the property of thermal resistance for a specific
thickness of blanket is only part of the total thermal perfor-
mance of a building element such as a wall, ceiling, floor, and
so forth, this specification states only general classifications for
thermal resistance of the fibrous blanket itself. Facings that
provide additional resistance to water-vapor transfer can affect
system performance.
12. Sampling
12.1 Sampling of the insulation shall be in accordance with
Practice C390. Specific provision for sampling shall be agreed
upon between the purchaser and the supplier.
13. Test Methods
13.1 Dimensions—Test in accordance with Test Methods
C167.
13.2 Thermal Resistance:
13.2.1 Test in accordance with Test Method C177 or Test
Method C518 at 75 62°F (24 61°C) mean temperature. If
Test Method C518 is used, the manufacturer shall certify that
recent calibrations have been made.
NOTE 2—See Guide C653. The thermal resistance is a function of mean
temperature. As an option, determine the thermal resistance at additional
mean temperatures as agreed upon by the purchaser and the manufacturer.
13.2.2 In case of question, determine referee test values in
accordance with Test Method C177, with resistances reported
at 75 62°F (24 61°C) mean temperature. The precision and
bias of the apparatus used for referee tests must be verified by
measuring the R-value of a standard reference material of light
density thermal insulation obtained from the National Institute
of Standards and Technology.
3
Determine thermal resistance at
the thickness marked on the product if its measured thickness
is equal to or greater than this value. Determine thermal
resistance at actual thickness if less than the thickness marked
on the product. Always test at a thickness within the design
accuracy limits of the test apparatus. For marked thicknesses
appreciably greater than apparatus design, some materials can
be split and both sections tested, but this procedure is often
undesirable.
13.2.3 If the blanket is furnished with adhered facings,
remove the facings by a means that provides a surface
equivalent to the surface that the material would have before
application of the facing.
3
Contact National Institute of Standards and Technology (NIST), 100 Bureau
Dr., Stop 3460, Gaithersburg, MD 20899-3460.
TABLE 1 Dimensions and Tolerances
A
Element Dimension Tolerance
Length, in.
(mm)
cut pieces up to 96 in. (2 m) −
1
⁄
2
in. (13 mm), excess
permitted
cut pieces up to 144 in. (4 m) −1.0 in. (25 mm), excess
permitted
rolls over 144 in. (4 m) −0.5 %, excess permitted
Width, in. (mm) pieces and rolls up to 24 in.
(0.6 m)
−
1
⁄
4
in. (6 mm), +
1
⁄
2
in. (13
mm)
rolls 24 to 144 in. (0.6 to
4 m)
−
1
⁄
4
in. (6 mm), +
1
⁄
2
in. (13
mm)
Thickness as required for thermal resist-
ance
B
consistent with tolerances of
thermal resistance
C
A
All sizes listed are not always available from all manufacturers. For sizes other
than those listed, consult manufacturers.
B
Thicknesses of the various mineral fiber insulations available can differ to provide
rated thermal resistance. Products are generally available in a range of thick-
nesses from 3 to 12 in. (75 to 305 mm). Thickness required to attain a rated
performance shall not exceed that of the cavity into which the material shall be
installed.
C
Blanket insulation manufactured to provide a designated thermal resistance are
produced by varying one or more of the factors of density, thickness, or fiber
characteristics. Therefore, blankets having the same designated thermal resis-
tance but different manufacturing sources may vary in one or more of these
factors.
C665 − 24
3
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本页面详细介绍 ASTM C665 - 24 标准规范，涵盖轻型框架结构和预制房屋用矿物纤维毯隔热材料的技术要求、测试方法及合规性指南。该标准由美国材料与试验协会（ASTM）发布，最新版本于2024年更新，适用于住宅及商业建筑中木结构或钢结构的隔热应用。内容涉及材料密度、导热系数、燃烧特性、湿气吸附及安装性能等关键指标，帮助工程师、建筑师、承包商及质检人员确保所选矿物纤维毯满足建筑节能与防火安全要求。无论您是从事预制房屋设计、轻型框架施工，还是需要进行材料选型与验收，本规范都能为您提供权威参考，
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