ASTM C991-00

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: 09-Nov-2000
• 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 C991-98 - Standard Specification for Flexible Glass Fiber Insulation for Metal Buildings
• Effective Date: 10-Nov-2000
• Replaced By: ASTM C991-03 - Standard Specification for Flexible Glass Fiber Insulation for Metal Buildings
• Effective Date: 01-Oct-2003
• 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: 10-Nov-2000
• 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: 10-Nov-2000

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 991 – 00
Standard Specification for
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Flexible Glass Fiber Insulation for Metal Buildings
This standard is issued under the fixed designation C 991; 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.
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1. Scope The Heat Flow Meter Apparatus
C 653 Guide for Determination of the Thermal Resistance
1.1 This specification covers the classification, composition,
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of Low-Density Blanket-Type Mineral Fiber Insulation
and physical properties of flexible glass fiber insulation for use
C 1104 Test Method for Determining Water Vapor Sorption
as interior surface of walls and roofs of metal buildings.
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of Unfaced Mineral Fiber Insulation.
1.2 The basic insulation blanket is designed to be post-
C 1136 Specification for Flexible, Low Permeance Vapor
processed by a laminating process that applies an adhesive
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Retarders for Thermal Insulation
bonded facing to provide the interior finish and vapor retarder
C 1338 Test Method for Determining Fungi Resistance of
requirements for the building envelope.
2
Insulation Materials and Facings
1.3 The thermal values measured in accordance with this
E 84 Test Method for Surface Burning Characteristics of
specification for both pre-processed and post-processed insu-
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Building Materials
lation are for the insulation only and do not include the effects
E 96 Test Methods for Water Vapor Transmission of Mate-
of air-film surface resistance, changes in mean temperature, or
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rials
compression of insulation at the framing members of the
2.2 Other Referenced Documents:
building, through metal conductance of fasteners and other
CAN/ULC-S102–M88 Standard Method of Test for Surface
parallel heat-transfer paths due to design or installation tech-
Burning Characteristics of Building Materials and Assem-
niques.
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blies
1.4 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are provided
3. Terminology
for information only.
3.1 Definitions—For definitions of terms relating to insula-
1.5 The following safety caveat pertains to the Test Method
tion, refer to Terminology C 168.
section of this specification: This standard does not purport to
address all of the safety concerns, if any, associated with its
4. Classification
use. It is the responsibility of the user of this standard to
4.1 The flexible insulation is furnished in two types, as
establish appropriate safety and health practices and deter-
follows:
mine the applicability of regulatory limitations prior to use.
4.1.1 Type I—Glass processed from the molten state into
fibrous form, bonded with a thermosetting resin, and formed
2. Referenced Documents
into a resilient flexible blanket or batt.
2.1 ASTM Standards:
4.1.2 Type II—Type I material supplied with a suitable
C 167 Test Methods for Thickness and Density of Blanket
2 vapor-retarder facing adhered to one surface.
or Batt Thermal Insulations
C 168 Terminology Relating to Thermal Insulating Materi-
5. Ordering Information
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als
5.1 Type I material shall be ordered by specifying thermal
C 177 Test Method for Steady-State Heat Flux Measure-
resistance value, length, and width.
ments and Thermal Transmission Properties by Means of
5.2 Type II material shall be ordered by specifying thermal
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the Guarded-Hot-Plate Apparatus
resistance value, type of facing, facing permeance, length,
C 390 Criteria for Sampling and Acceptance of Preformed
width, number of tabs, and tab width.
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Thermal Insulation Lots
5.3 Certification, when required, shall be in accordance with
C 518 Test Method for Steady-State Heat Flux Measure-
Section 12.
ments and Thermal Transmission Properties by Means of
6. Physical Properties
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6.1 Type 1 Material:
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.
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Current edition approved Nov 10, 2000. Published February 2001. Originally Annual Book of ASTM Standards, Vol 04.07.
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published as C 991 – 83. Last previous edition C 991 – 98. Available from Underwriters Laboratories of Canada, 7 Crouse Road, Scarbor-
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Annual Book of ASTM Standards, Vol 04.06. ough, Ontario Canada M1R 3A9.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 991
6.1.1 Thermal Resistance—The thermal resistance of the accordance with the Desiccant
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