ASTM C991-16

Standard Specification for Flexible Fibrous Glass Insulation for Metal Buildings

ABSTRACT
This 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. The basic insulation blanket is designed to be postprocessed by a laminating process that applies an adhesive bonded facing to provide the interior finish and vapor retarder requirements for the building envelope The flexible insulation is furnished into Types I and II. Type I which is a glass processed from the molten state into fibrous form, bonded with a thermosetting resin, and formed into a resilient flexible blanket or batt. Type II is a Type I material supplied with a suitable facing adhered to one surface. The following physical properties of Types I and II materials shall be determined: thermal resistance, surface burning characteristics, combustion characteristics, water vapor sorption, fungi resistance, corrosiveness, odor emission, dimensional tolerances, and humid aging.
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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2016
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.23 - Blanket and Loose Fill Insulation

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: C991 − 16
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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope C390 Practice for Sampling and Acceptance of Thermal
Insulation Lots
1.1 This specification covers the classification, composition,
C518 Test Method for Steady-State Thermal Transmission
and physical properties of flexible fibrous glass insulation for
Properties by Means of the Heat Flow Meter Apparatus
use in metal building roofs and walls.
C653 Guide for Determination of the Thermal Resistance of
1.2 The basic insulation blanket is designed to be post-
Low-Density Blanket-Type Mineral Fiber Insulation
processed by a laminating process that applies an adhesive
C665 Specification for Mineral-Fiber Blanket Thermal Insu-
bonded facing.
lation for Light Frame Construction and Manufactured
Housing
1.3 The thermal values measured in accordance with this
specification for both pre-processed and post-processed insu- C755 Practice for Selection of Water Vapor Retarders for
Thermal Insulation
lation are for the insulation only and do not include the effects
of air-film surface resistance, changes in mean temperature, or C1104/C1104M Test Method for Determining the Water
Vapor Sorption of Unfaced Mineral Fiber Insulation
compression of insulation at the framing members of the
building, through metal conductance of fasteners and other C1136 Specification for Flexible, Low Permeance Vapor
Retarders for Thermal Insulation
parallel heat-transfer paths due to design or installation tech-
niques. C1304 Test Method for Assessing the Odor Emission of
Thermal Insulation Materials
1.4 The values stated in inch-pound units are to be regarded
C1338 Test Method for Determining Fungi Resistance of
as standard. The values given in parentheses are mathematical
Insulation Materials and Facings
conversions to SI units that are provided for information only
C1617 Practice for Quantitative Accelerated Laboratory
and are not considered standard.
Evaluation of Extraction Solutions Containing Ions
1.5 This standard does not purport to address all of the
Leached from Thermal Insulation on Aqueous Corrosion
safety concerns, if any, associated with its use. It is the
of Metals
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.
E136 Test Method for Behavior of Materials in a Vertical
Tube Furnace at 750°C
2. Referenced Documents
E2988 Practice for Specimen Preparation and Mounting of
2
2.1 ASTM Standards:
Flexible Fibrous Glass Insulation for Metal Buildings to
C167 Test Methods for Thickness and Density of Blanket or
Assess Surface Burning Characteristics
Batt Thermal Insulations
2.2 Other Referenced Document:
C168 Terminology Relating to Thermal Insulation
CAN/ULC-S102 Standard Method of Test for Surface Burn-
3
C177 Test Method for Steady-State Heat Flux Measure-
ing Characteristics of Building Materials and Assemblies
ments and Thermal Transmission Properties by Means of
the Guarded-Hot-Plate Apparatus 3. Terminology
3.1 Definitions—For definitions of terms relating to
1
insulation, refer to Terminology C168.
This specification is under the jurisdiction of ASTM Committee C16 on
Thermal Insulation and is the direct responsibility of Subcommittee C16.23 on
4. Classification
Blanket and Loose Fill Insulation.
Current edition approved May 1, 2016. Published June 2016. Originally
4.1 The flexible fibrous glass insulation is furnished in two
approved in 1983. Last previous edition approved in 2015 as C991 – 15. DOI:
types, as follows:
10.1520/C0991-16.
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 (UL), 333 Pfingsten Rd.,
the ASTM website. Northbrook, 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 − 16
4.1.1 Type I—Glass processed from the molten state into insulation shall show no greater corrosion than that observed
fibrous form, bonded with a thermosetting resin, and formed on the comparative plates in contact with sterile cotton.
into a
...

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: C991 − 15 C991 − 16
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. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. 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.
2. Referenced Documents
2
2.1 ASTM Standards:
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 Measurements 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
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
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 Practice for Quantitative Accelerated Laboratory Evaluation of Extraction Solutions Containing Ions Leached from
Thermal Insulation on Aqueous Corrosion of Metals
E84 Test Method for Surface Burning Characteristics of Building Materials
E136 Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C
E2988 Practice for Specimen Preparation and Mounting of Flexible Fibrous Glass Insulation for Metal Buildings to Assess
Surface Burning Characteristics
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 April 15, 2015May 1, 2016. Published May 2015June 2016. Originally approved in 1983. Last previous edition approved in 20082015 as
ε1
C991 – 08C991 – 15. . DOI: 10.1520/C0991-15.10.1520/C0991-16.
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 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 − 16
2.2 Other Referenced Document:
3
CAN/ULC-S102 Standard Method of Test for Surface Burning Characteristics of Building Materials and Assemblies
3. Terminology
3.1 Definitions—For definitions of terms relating to insulation, refer to Terminology C168.
4. Classification
4.1 The flexible fibrous glass insulation is furnished in two types, as follows:
4.1.1 Type I—Glass processed from the mol
...