ASTM C991-08
(Specification)Standard Specification for Flexible Fibrous Glass Insulation for Metal Buildings
Standard Specification for Flexible Fibrous Glass Insulation for Metal Buildings
SCOPE
1.1 This specification covers the classification, composition, and physical properties of flexible fibrous glass insulation for use in metal building roofs and walls.
1.2 The basic insulation blanket is designed to be post-processed by a laminating process that applies an adhesive bonded facing.
1.3 The thermal values measured in accordance with this specification for both pre-processed and post-processed insulation are for the insulation only and do not include the effects of air-film surface resistance, changes in mean temperature, or compression of insulation at the framing members of the building, through metal conductance of fasteners and other parallel heat-transfer paths due to design or installation techniques.
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 and health practices and determine the applicability of regulatory requirements prior to use.
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Designation: C 991 – 08
Standard Specification for
1
Flexible Fibrous Glass Insulation for Metal Buildings
This standard is issued under the fixed designation C991; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope C518 Test Method for Steady-State Thermal Transmission
Properties by Means of the Heat Flow Meter Apparatus
1.1 Thisspecificationcoverstheclassification,composition,
C653 Guide for Determination of the Thermal Resistance
and physical properties of flexible fibrous glass insulation for
of Low-Density Blanket-Type Mineral Fiber Insulation
use in metal building roofs and walls.
C665 Specification for Mineral-Fiber Blanket Thermal In-
1.2 The basic insulation blanket is designed to be post-
sulation for Light Frame Construction and Manufactured
processed by a laminating process that applies an adhesive
Housing
bonded facing.
C755 Practice for Selection of Water Vapor Retarders for
1.3 The thermal values measured in accordance with this
Thermal Insulation
specification for both pre-processed and post-processed insu-
C1104/C1104M Test Method for Determining the Water
lation are for the insulation only and do not include the effects
Vapor Sorption of Unfaced Mineral Fiber Insulation
of air-film surface resistance, changes in mean temperature, or
C1136 Specification for Flexible, Low Permeance Vapor
compression of insulation at the framing members of the
Retarders for Thermal Insulation
building, through metal conductance of fasteners and other
C1258 Test Method for Elevated Temperature and Humid-
parallel heat-transfer paths due to design or installation tech-
ity Resistance of Vapor Retarders for Insulation
niques.
C1304 Test Method for Assessing the Odor Emission of
1.4 Thevaluesstatedininch-poundunitsaretoberegarded
Thermal Insulation Materials
as standard. The values given in parentheses are mathematical
C1338 Test Method for Determining Fungi Resistance of
conversions to SI units that are provided for information only
Insulation Materials and Facings
and are not considered standard.
E84 Test Method for Surface Burning Characteristics of
1.5 This standard does not purport to address all of the
Building Materials
safety concerns, if any, associated with its use. It is the
E136 Test Method for Behavior of Materials in a Vertical
responsibility of the user of this standard to establish appro-
Tube Furnace at 750°C
priate safety and health practices and determine the applica-
2.2 Other Referenced Document:
bility of regulatory requirements prior to use.
CAN/ULC-S102 Standard Method of Test for Surface
2. Referenced Documents
BurningCharacteristicsofBuildingMaterialsandAssem-
3
2
blies
2.1 ASTM Standards:
C167 Test Methods for Thickness and Density of Blanket
3. Terminology
or Batt Thermal Insulations
3.1 Definitions—For definitions of terms relating to insula-
C168 Terminology Relating to Thermal Insulation
tion, refer to Terminology C168.
C177 Test Method for Steady-State Heat Flux Measure-
ments and Thermal Transmission Properties by Means of
4. Classification
the Guarded-Hot-Plate Apparatus
4.1 The flexible fibrous glass insulation is furnished in two
C390 Practice for Sampling and Acceptance of Thermal
types, as follows:
Insulation Lots
4.1.1 Type I—Glass processed from the molten state into
fibrous form, bonded with a thermosetting resin, and formed
into a blanket or batt.
1
This specification is under the jurisdiction of ASTM Committee C16 on
4.1.2 Type II—Type I material supplied with a suitable
Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on
facing adhered to one surface.
Blanket and Loose Fill Insulation.
Current edition approved May 1, 2008. Published May 2008. Originally
NOTE 1—Facing properties are not part of this specification. The
approved in 1983. Last previous edition approved in 2003 as C991–03.
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from Underwriters Laboratories (UL), 333 Pfingsten Rd., North-
the ASTM website. brook, IL 60062-2096, http://www.ul.com.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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C991–08
designer is referred to Practice C755 and Specification C1136 for NOTE 3—Normally, a slight excess in all dimensions will be permitted.
guidance in selecting water vapor permeance and other physical property However,thepurchasermayele
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:C991–03 Designation: C 991 – 08
Standard Specification for
1
Flexible Fibrous Glass Insulation for Metal Buildings
This standard is issued under the fixed designation C991; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1This specification covers the classification, composition, and physical properties of flexible fibrous glass insulation for use
as interior surface of walls and roofs of metal buildings.
1.2Thebasicinsulationblanketisdesignedtobepost-processedbyalaminatingprocessthatappliesanadhesivebondedfacing
to provide the interior finish and vapor retarder requirements for the building envelope.
1.1 This specification covers the classification, composition, and physical properties of flexible fibrous glass insulation for use
in metal building roofs and walls.
1.2 The basic insulation blanket is designed to be post-processed by a laminating process that applies an adhesive bonded
facing.
1.3 The thermal values measured in accordance with this specification for both pre-processed and post-processed insulation are
for the insulation only and do not include the effects of air-film surface resistance, changes in mean temperature, or compression
ofinsulationattheframingmembersofthebuilding,throughmetalconductanceoffastenersandotherparallelheat-transferpaths
due to design or installation techniques.
1.4The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for
information only.
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 and health practices and determine the applicability of regulatory
requirements prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C167 Test Methods for Thickness and Density of Blanket or Batt Thermal Insulations
C168Terminology Relating to Thermal Insulating Materials 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
C390Criteria Practice for Sampling and Acceptance of Preformed Thermal Insulation Lots
C518 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of Thethe Heat
Flow Meter Apparatus
C653 Guide for Determination of the Thermal Resistance of Low-Density Blanket-Type Mineral Fiber Insulation
C665 Specification for Mineral-Fiber Blanket Thermal Insulation for Light Frame Construction and Manufactured Housing
C755 Practice for Selection of Water Vapor Retarders for Thermal Insulation
C1104/C1104M Test Method for Determining the Water Vapor Sorption of Unfaced Mineral Fiber Insulation.
C1136 Specification for Flexible, Low Permeance Vapor Retarders for Thermal Insulation
C1258 Test Method for Elevated Temperature and Humidity Resistance of Vapor Retarders for 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
E84 Test Method for Surface Burning Characteristics of Building Materials
E96Test Methods for Water Vapor Transmission of Materials
1
ThisspecificationisunderthejurisdictionofASTMCommitteeC16onThermalInsulationandisthedirectresponsibilityofSubcommitteeC16.23onBlanketandLoose
Fill Insulation.
Current edition approved Oct.May 1, 2003.2008. Published November 2003.May 2008. Originally approved in 1983. Last previous edition approved in 20002003 as
C991–003.
2
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@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 ----------------------
C991–08
E136 Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°750C
2.2 Other Referenced D
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