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ASTM C475/C475M-17(2022)

(Specification)

Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board

Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board

ABSTRACT
This specification covers all-purpose, taping and finishing joint compounds, paper joint tape and glass-mesh joint tape. No cracks in the thinner half of the wedge and no deep fissure cracks in the thicker half of the wedge. Other physical properties such as putrefaction, shrinkage, joint tape, width, thickness and tensile strength shall also be determined. Tests such as dimensional stability test, assembly of taping or all-purpose compound and joint-tape test, bond test, edge cracking test, and skewness test are required for paper joint-tape.
SCOPE
1.1 This specification covers all-purpose, taping and finishing joint compounds, paper joint tape, and glass-mesh joint tape.  
1.1.1 The joint materials used in this standard are designed to be used with gypsum board installed in accordance with Specification C840.  
1.2 This specification also covers the minimum requirements for an assembly of taping and all-purpose compound and joint tape.  
1.3 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.4 The values stated in either inch-pound or SI (metric) units are to be regarded separately as standard. Within the text, the SI units are shown in parentheses. The values stated in each system shall be used independent of the other. Values from the two systems shall not be combined.  
1.5 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.

General Information

Status
Published
Publication Date
31-May-2022
ICS
91.100.10 - Cement. Gypsum. Lime. Mortar
Technical Committee
C11 - Gypsum and Related Building Materials and Systems
Drafting Committee
C11.02 - Specifications and Test Methods for Accessories and Related Products
Current Stage
Ref Project

Relations

Refers
ASTM C474-15(2020) - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
Effective Date
01-Jun-2020
Refers
ASTM D3882-08(2020) - Standard Test Method for Bow and Skew in Woven and Knitted Fabrics
Effective Date
01-Jul-2020

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ASTM C475/C475M-17(2022) - Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum BoardASTM C475/C475M-17(2022) - Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
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ASTM C475/C475M-17(2022) - Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
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Standards Content (Sample)

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.
Designation:C475/C475M −17 (Reapproved 2022)
Standard Specification for
Joint Compound and Joint Tape for Finishing Gypsum
1
Board
This standard is issued under the fixed designation C475/C475M; 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 Materials and Systems
C474 Test Methods for Joint Treatment Materials for Gyp-
1.1 This specification covers all-purpose, taping and finish-
sum Board Construction
ing joint compounds, paper joint tape, and glass-mesh joint
C840 SpecificationforApplicationandFinishingofGypsum
tape.
Board
1.1.1 The joint materials used in this standard are designed
D123 Terminology Relating to Textiles
to be used with gypsum board installed in accordance with
D3882 Test Method for Bow and Skew in Woven and
Specification C840.
Knitted Fabrics
1.2 This specification also covers the minimum require-
F1615 Specification for Cautionary Labeling for Five-
mentsforanassemblyoftapingandall-purposecompoundand
Gallon Open-Head Plastic Containers
joint tape.
3. Terminology
1.3 The text of this specification references notes and
3.1 Definitions—Definitions shall be in accordance with
footnotes that provide explanatory material. These notes and
Terminology C11.
footnotes (excluding those in tables and figures) shall not be
3.2 Definitions of Terms Specific to This Standard:
considered as requirements of the specification.
3.2.1 glass-mesh joint-tape, n—a strip of multidirectional
1.4 The values stated in either inch-pound or SI (metric)
glass yarn material designed to reinforce the joint between two
units are to be regarded separately as standard. Within the text,
gypsum boards.
theSIunitsareshowninparentheses.Thevaluesstatedineach
3.2.2 joint tape, n—a strip of material used to conceal and
system shall be used independent of the other. Values from the
reinforce the joint between two gypsum boards.
two systems shall not be combined.
3.2.3 joint tape, self-adhering, n—a joint tape manufactured
1.5 This international standard was developed in accor-
to adhere directly to the substrate.
dance with internationally recognized principles on standard-
3.2.3.1 Discussion—Tapeshavingthisqualitydonotrequire
ization established in the Decision on Principles for the
mechanical or embedment means of attachment to the sub-
Development of International Standards, Guides and Recom-
strate.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.2.4 paper joint tape, n—a strip of paper reinforcing
materialdesignedtobeembeddedinthejointcompoundandto
2. Referenced Documents
reinforce the joint between two gypsum boards.
2
2.1 ASTM Standards:
3.2.5 skewness, n—as defined in Terminology D123.
C11 Terminology Relating to Gypsum and Related Building
4. Physical Properties
4.1 General—Thephysicalpropertiesshallbedeterminedin
1
This specification is under the jurisdiction of ASTM Committee C11 on
accordance with Test Methods C474, except as noted.
Gypsum and Related Building Materials and Systems and is the direct responsibility
4.2 Joint Compounds.
of Subcommittee C11.02 on Specifications and Test Methods for Accessories and
Related Products.
4.2.1 Check Cracking—No cracks in the thinner half of the
Current edition approved June 1, 2022. Published June 2022. Originally
wedge and no deep fissure cracks in the thicker half of the
approved in 1961. Last previous edition approved in 2017 as C475/C475M – 17.
wedge.
DOI: 10.1520/C0475_C0475M-17R22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4.2.2 Putrefaction—No putrefaction in less than four days.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.2.3 Shrinkage—Not more than 35 % by volume.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.3 Joint Tape:
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C475/C475M−17 (2022)
4.3.1 The following tests are required of all joint tape: 6. Inspection
7
4.3.1.1 Width—Shall be not less than 1 ⁄8 in. (48 mm) nor
6.1 Inspection of the joint compound and joint tape shall be
1
more than 2 ⁄4 in. (60 mm). The width of an individual roll
agreed upon between the purchaser and the supplier as part of
1
shall vary not more than 6 ⁄32 in.
...

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This specification covers the installation of lathing and furring to receive interior and exterior Portland cement-based plaster. The following materials shall be used: metal plaster bases—expanded metal lath and wire laths; accessories—steel, PVC plastic, zinc alloy, and cornerite; channels—external corner reinforcement and foundation weep screed; wire; rod and strap hangers; clips; fasteners—nails and screws. Hangers and cold-rolled channel main runner shall conform to the allowable spacing and spans, respectively. The following methods are discussed: installation of hangers for suspended ceilings under wood constructions, attachment of hangers to main runners, installation of main runners, installation of cross furring, metal furring for walls, lapping of metal plaster bases, spacing of attachments for metal plaster bases, application of metal plaster bases, and application of accessories.
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1.1 This specification covers the minimum technical requirements for the installation of lathing and furring for the application of exterior and interior portland cement-based plaster, as in Specification C926. These requirements do not by default define a unit of work or assign responsibility for contractual purposes, which is the purview of a contract or contracts made between contracting entities.  
1.2 Table of Contents:    
Scope  
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Referenced Documents  
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Terminology  
3  
Delivery and Storage of Materials  
4  
Materials  
5  
Requirements for Substrates to Receive Metal Lathing & Furring  
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7  
Workmanship  
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Installation of Metal Furring for Walls  
7.2  
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Installation of Lathing Accessories  
7.4  
Keywords  
8  
Installation of Metal Furring for Suspended Ceilings  
Annex A1  
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4.1 Each abuse/impact property of abuse resistant wall panels is divided into three classification levels. The three levels of classification are: Level I, Level II, and Level III, with Level I representing the lowest rating for any given property. The test methods specified are utilized to establish the abuse-resistance classification of an abuse resistant wall panel. Each classification level requires a minimum overall specified performance. Any classified abuse resistant wall panel can be used at a classification level which is rated lower than the highest level qualified.
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This specification covers the minimum requirements for gypsum veneer plaster and includes application methods on systems such as electric heat cable systems but not exceeding a specified temperature. Applicable building code regulations should be followed when a specific degree of fire resistance is required. Plaster and other cementitious materials should be kept dry until these are ready to be used and should be kept off the ground, under cover, and away from damp walls and surfaces.
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1.1 This specification covers the minimum requirements for and methods of applying gypsum veneer plaster.  
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1.2.1 Details of construction for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.  
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This specification covers the minimum requirements for, and the methods of application of, interior lathing and furring to receive gypsum plaster applied. Other materials are not prohibited from being used provided that their physical characteristics and durability under conditions of usage are at least equal in performance to those described. All materials shall be kept dry, preferably by being stored inside. Where necessary to be stored outside, materials shall be stacked off the ground, supported on a level platform, and protected from the weather and surface contamination. Materials shall be neatly stacked flat with care taken to avoid damage to edges, ends, or surfaces. The materials to be used are the following: tie wire and hanger wire, gypsum lath, expanded metal lath, welded wire lath, woven wire lath, nails, screws, staples, paper, and accessories such as control joints, cornerite, channels, rod and flat hangers, clips, and striplath. In general, during installation, the following shall be required: application of gypsum lath to supports, application of gypsum lath to wood supports, application of gypsum lath to metal supports, studless solid partitions (gypsum lath and plaster), application of metal plaster bases to framing members, studless solid partitions (metal lath and plaster), suspended and furred ceilings (metal lath and gypsum lath construction), main runners, cross furring, and metal furring for walls.
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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 Details of construction for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.  
1.4 Where a specific degree of sound control is required for plastered assemblies and constructions, details of construction shall be obtained from reports of acoustical tests of assemblies that have met the required or specified acoustical performance.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 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.

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Note 1: General information will be found in Annex A1. Design considerations will be found in Annex A2.  
1.3 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.4 Details of construction for a specific assembly to achieve the required fire resistance shall be obtained from reports of fire-resistance tests, engineering evaluations, or listings from recognized fire testing laboratories.  
1.5 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.  
1.6 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.

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ASTM C11-23(Terminology)
Standard Terminology Relating to Gypsum and Related Building Materials and Systems

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