ASTM C991-03

Standard Specification for Flexible Glass Fiber Insulation for Metal Buildings

SCOPE
1.1 This specification covers the classification, composition, and physical properties of flexible glass fiber insulation for use as interior surface of walls and roofs of metal buildings.
1.2 The basic insulation blanket is designed to be post-processed by a laminating process that applies an adhesive bonded facing to provide the interior finish and vapor retarder requirements for the building envelope.
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 the standard. The values given in parentheses are provided for information only.
1.5 The following safety caveat pertains to the Test Method section of this specification:  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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2003
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.23 - Blanket and Loose Fill Insulation

Relations

• Replaces: ASTM C991-00 - Standard Specification for Flexible Glass Fiber Insulation for Metal Buildings
• Effective Date: 01-Oct-2003
• Replaced By: ASTM C991-08 - Standard Specification for Flexible Fibrous Glass Insulation for Metal Buildings
• Effective Date: 01-May-2008
• Referred By: ASTM E2988-17(2022) - Standard Practice for Specimen Preparation and Mounting of Flexible Fibrous Glass Insulation for Metal Buildings to Assess Surface Burning Characteristics
• Effective Date: 01-Oct-2003
• Referred By: ASTM C1558-19 - Standard Guide for Development of Standard Data Records for Computerization of Thermal Transmission Test Data for Thermal Insulation
• Effective Date: 01-Oct-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: C 991 – 03
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 C390 Criteria for Sampling and Acceptance of Preformed
Thermal Insulation Lots
1.1 Thisspecificationcoverstheclassification,composition,
C518 Test Method for Steady-State Heat Flux Measure-
and physical properties of flexible fibrous glass insulation for
ments and Thermal Transmission Properties by Means of
use as interior surface of walls and roofs of metal buildings.
The Heat Flow Meter Apparatus
1.2 The basic insulation blanket is designed to be post-
C653 Guide for Determination of the Thermal Resistance
processed by a laminating process that applies an adhesive
of Low-Density Blanket-Type Mineral Fiber Insulation
bonded facing to provide the interior finish and vapor retarder
C665 Specification for Mineral-Fiber Blanket Thermal In-
requirements for the building envelope.
sulation for Light Frame Construction and Manufactured
1.3 The thermal values measured in accordance with this
Housing
specification for both pre-processed and post-processed insu-
C755 PracticeforSelectionofVaporRetardersforThermal
lation are for the insulation only and do not include the effects
Insulation
of air-film surface resistance, changes in mean temperature, or
C1104 Test Method for Determining Water Vapor Sorption
compression of insulation at the framing members of the
of Unfaced Mineral Fiber Insulation.
building, through metal conductance of fasteners and other
C1136 Specification for Flexible, Low Permeance Vapor
parallel heat-transfer paths due to design or installation tech-
Retarders for Thermal Insulation
niques.
C1258 Test Method for Elevated Temperature and Humid-
1.4 Thevaluesstatedininch-poundunitsaretoberegarded
ity Resistance of Vapor Retarders for Insulation
as the standard. The values given in parentheses are provided
C1304 Test Method for Assessing the Odor Emission of
for information only.
Thermal Insulation
1.5 This standard does not purport to address all of the
C1338 Test Method for Determining Fungi Resistance of
safety concerns, if any, associated with its use. It is the
Insulation Materials and Facings
responsibility of the user of this standard to establish appro-
E84 Test Method for Surface Burning Characteristics of
priate safety and health practices and determine the applica-
Building Materials
bility of regulatory requirements prior to use.
E96 Test Methods for Water Vapor Transmission of Mate-
2. Referenced Documents
rials
2
E136 Test Method for Behavior of Materials in a Vertical
2.1 ASTM Standards:
Tube Furnace at 750°
C167 Test Methods for Thickness and Density of Blanket
2.2 Other Referenced Document:
or Batt Thermal Insulations
CAN/ULC-S102–M88 StandardMethodofTestforSurface
C168 Terminology Relating to Thermal Insulating Materi-
BurningCharacteristicsofBuildingMaterialsandAssem-
als
3
blies
C177 Test Method for Steady-State Heat Flux Measure-
ments and Thermal Transmission Properties by Means of
3. Terminology
the Guarded-Hot-Plate Apparatus
3.1 Definitions—For definitions of terms relating to insula-
tion, refer to Terminology C168.
1
This specification is under the jurisdiction of ASTM Committee C16 on
4. Classification
Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on
Blanket and Loose Fill Insulation.
4.1 The flexible insulation is furnished in two types, as
Current edition approved Oct. 1, 2003. Published November 2003. Originally
follows:
approved in 1983. Last previous edition approved in 2000 as C991–00.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from Underwriters Laboratories of Canada, 7 Crouse Road, Scarbor-
the ASTM website. ough, Ontario Canada M1R 3A9.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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C991–03
4.1.1 Type I—Glass processed from the molten state into Methods C167, (Note 2) by more than the following:
fibrous form, bonded with a thermosetting resin, and formed Length,−0 in. (−0 mm)
1
into a resilient flexible blanket or batt. Width,− ⁄8 in. (−3 mm)
4.1.2 Type II—Type I material supplied with a suitable
NOTE 2—Normally, a slight excess in all dimensions will be permitted.
facing adhered to one surface.
However,th
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