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ASTM C840-13

(Specification)

Standard Specification for Application and Finishing of Gypsum Board

Standard Specification for Application and Finishing of Gypsum Board

ABSTRACT
This specification covers requirements for the methods of application and finishing of gypsum board. Construction details 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. Gypsum board assembly shall conform to acoustical tests of the specification where sound control is required. Moreover, gypsum assembly shall conform to framing size, fasteners spacing, ventilation, substrate, surface preparation, cutting, and installation application as indicated in the specification. Materials categorized under this specification include: gypsum boards, gypsum wallboards, gypsum backing board and coreboard, water-resistant gypsum backing board, exterior gypsum soffit board, and gypsum ceiling board. Finishing materials include: compounds, joint tape, fasteners, nails, screws, and staples. A fire test of assemblies shall be conducted to determine a fire resistance rating required for gypsum board assembly. Gypsum board shall be cut by scoring and breaking or by sawing, working from the face side. Masonry or concrete walls shall be dry, free of dust, oil, or form release agents, protrusions or voids, or foreign matter that inhibit bond for adhesively applied gypsum board. All materials shall be kept dry. Where gypsum board is stored outside, it shall be off the ground, properly supported on a level platform and fully protected from the weather or direct sunlight exposure.
SCOPE
1.1 This specification covers the minimum requirements for the methods of application and finishing of gypsum board, including related items and accessories.  
1.2 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.  
1.2.1 Where this specification is more stringent (size or thickness of framing: size and spacing of fasteners) than the fire-rated construction, this specification shall govern.  
1.3 Where sound control is required for a gypsum board assembly, details of construction shall be in accordance with reports of acoustical tests of assemblies that have met the required acoustical values.  
1.4 Unheated spaces above gypsum board ceilings shall be properly ventilated (see Appendix X2).  
1.5 The various application systems are located in the following sections:
I  
Application of Single-Ply Gypsum Board to Wood Framing
Members  
8  
II  
Application of Two-Ply Gypsum Board to Wood Framing
Members  
9  
III  
Application of Gypsum Board by Adhesive Nail-On to
Wood Framing Members  
10  
IV  
Semi-Solid Gypsum Board Partitions  
11  
V  
Solid Gypsum Board Partitions  
12  
VI  
Application of Gypsum Board with Adhesives to Interior
Masonry or Concrete Walls  
13  
VII  
Application of Gypsum Board to Rigid Foam Insulation  
14  
VIII  
Application of Gypsum Board to Steel Framing and Furring  
15  
IX  
Arches and Bending Radii  
16  
X  
Application of Gypsum Board to Receive Tile by
Adhesive Application  
17  
XI  
Exterior Application of Gypsum Wallboard and
Exterior Gypsum Soffit Board  
18  
XII  
Floating Interior Angles  
19  
XIII  
Control (Expansion) Joints  
20  
XIV  
Foil-Backed Gypsum Board  
21  
XV  
Application of Vinyl Faced Gypsum Board  
22
1.6 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.  
1.7 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification...

General Information

Status
Historical
Publication Date
30-Nov-2013
ICS
91.100.10 - Cement. Gypsum. Lime. Mortar
Technical Committee
C11 - Gypsum and Related Building Materials and Systems
Drafting Committee
C11.03 - Specifications for the Application of Gypsum and Other Products in Assemblies
Current Stage
Ref Project

Relations

Replaces
ASTM C840-11 - Standard Specification for Application and Finishing of Gypsum Board
Effective Date
01-Dec-2013
Replaced By
ASTM C840-16 - Standard Specification for Application and Finishing of Gypsum Board
Effective Date
01-Sep-2016
Referred By
ASTM C1467/C1467M-00(2021) - Standard Specification for Installation of Molded Glass Fiber Reinforced Gypsum Parts
Effective Date
01-Dec-2013
Referred By
ASTM C1629/C1629M-23 - Standard Classification for Abuse-Resistant Nondecorated Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels
Effective Date
01-Dec-2013
Referred By
ASTM C754-20 - Standard Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products
Effective Date
01-Dec-2013
Referred By
ASTM C1546-19 - Standard Guide for Installation of Gypsum Products in Concealed Radiant Ceiling Heating Systems
Effective Date
01-Dec-2013
Referred By
ASTM C1396/C1396M-17 - Standard Specification for Gypsum Board
Effective Date
01-Dec-2013
Referred By
ASTM C475/C475M-17(2022) - Standard Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
Effective Date
01-Dec-2013
Referred By
ASTM C474-15(2020) - Standard Test Methods for Joint Treatment Materials for Gypsum Board Construction
Effective Date
01-Dec-2013

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ASTM C840-13 - Standard Specification for Application and Finishing of Gypsum BoardASTM C840-13 - Standard Specification for Application and Finishing of Gypsum Board
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REDLINE ASTM C840-13 - Standard Specification for Application and Finishing of Gypsum BoardREDLINE ASTM C840-13 - Standard Specification for Application and Finishing of Gypsum Board
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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:C840 −13
StandardSpecification for
1
Application and Finishing of Gypsum Board
This standard is issued under the fixed designation C840; 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*
XI Exterior Application of Gypsum Wallboard and 18
Exterior Gypsum Soffit Board
1.1 This specification covers the minimum requirements for
XII Floating Interior Angles 19
the methods of application and finishing of gypsum board, XIII Control (Expansion) Joints 20
XIV Foil-Backed Gypsum Board 21
including related items and accessories.
XV Application of Vinyl Faced Gypsum Board 22
1.2 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
1.6 The values stated in inch-pound units are to be regarded
listings from recognized fire testing laboratories.
as standard. The values given in parentheses are mathematical
1.2.1 Where this specification is more stringent (size or
conversions to SI units that are provided for information only
thickness of framing: size and spacing of fasteners) than the
and are not considered standard.
fire-rated construction, this specification shall govern.
1.7 The text of this specification references notes and
1.3 Where sound control is required for a gypsum board
footnotes which provide explanatory material. These notes and
assembly, details of construction shall be in accordance with
footnotes (excluding those in tables and figures) shall not be
reports of acoustical tests of assemblies that have met the
considered as requirements of the specification.
required acoustical values.
1.8 The following precautionary caveat pertains only to
1.4 Unheated spaces above gypsum board ceilings shall be
Sections6–25. This standard does not purport to address all
properly ventilated (see Appendix X2).
of the safety concerns, if any, associated with its use. It is the
1.5 The various application systems are located in the
responsibility of the user of this standard to establish appro-
following sections:
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
I Application of Single-Ply Gypsum Board to Wood 8
1.8.1 For specific precautionary statements, see 4.1.1, 4.1.2,
Framing
and 23.5.
Members
II Application of Two-Ply Gypsum Board to Wood 9
Framing
2. Referenced Documents
Members
2
III Application of Gypsum Board by Adhesive Nail-On to 10 2.1 ASTM Standards:
Wood Framing Members
C11 Terminology Relating to Gypsum and Related Building
IV Semi-Solid Gypsum Board Partitions 11
Materials and Systems
V Solid Gypsum Board Partitions 12
VI Application of Gypsum Board with Adhesives to Interior 13 C475/C475M Specification for Joint Compound and Joint
Masonry or Concrete Walls
Tape for Finishing Gypsum Board
VII Application of Gypsum Board to Rigid Foam Insulation 14
C514 Specification for Nails for the Application of Gypsum
VIII Application of Gypsum Board to Steel Framing and 15
Furring Board
IX Arches and Bending Radii 16
C557 Specification for Adhesives for Fastening Gypsum
X Application of Gypsum Board to Receive Tile by 17
Wallboard to Wood Framing
Adhesive Application
C645 Specification for Nonstructural Steel Framing Mem-
bers
1
This specification is under the jurisdiction of ASTM Committee C11 on
Gypsum and Related Building Materials and Systems and is the direct responsibility
ofSubcommitteeC11.03onSpecificationsfortheApplicationofGypsumandOther
2
Products in Assemblies. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Dec. 1, 2013. Published January 2014. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1979. Last previous edition approved in 2011 as C840 – 11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/C0840-13. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C840−13
C754 Specification for Installation of Steel Framing Mem- accessories concealed with joint compound, and has been
bers to Receive Screw-Attached Gypsum Panel Products sanded to prepare the surface to receive job applied decoration.
C920 Specification for Elastomeric Joint Sealants
3.2.9 finishing,n—thepreparationofgypsumboardsurfaces
...

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: C840 − 11 C840 − 13
Standard Specification for
1
Application and Finishing of Gypsum Board
This standard is issued under the fixed designation C840; 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*
1.1 This specification covers the minimum requirements for the methods of application and finishing of gypsum board,
including related items and accessories.
1.2 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.
1.2.1 Where this specification is more stringent (size or thickness of framing: size and spacing of fasteners) than the fire-rated
construction, this specification shall govern.
1.3 Where sound control is required for a gypsum board assembly, details of construction shall be in accordance with reports
of acoustical tests of assemblies that have met the required acoustical values.
1.4 Unheated spaces above gypsum board ceilings shall be properly ventilated (see Appendix X2).
1.5 The various application systems are located in the following sections:
I Application of Single-Ply Gypsum Board to Wood 8
Framing
Members
II Application of Two-Ply Gypsum Board to Wood 9
Framing
Members
III Application of Gypsum Board by Adhesive Nail-On to 10
Wood Framing Members
IV Semi-Solid Gypsum Board Partitions 11
V Solid Gypsum Board Partitions 12
VI Application of Gypsum Board with Adhesives to Interior 13
Masonry or Concrete Walls
VII Application of Gypsum Board to Rigid Foam Insulation 14
VIII Application of Gypsum Board to Steel Framing and 15
Furring
IX Arches and Bending Radii 16
X Application of Gypsum Board to Receive Tile by 17
Adhesive Application
XI Exterior Application of Gypsum Wallboard and 18
Exterior Gypsum Soffit Board
XII Floating Interior Angles 19
XIII Control (Expansion) Joints 20
XIV Foil-Backed Gypsum Board 21
XV Application of Vinyl Faced Gypsum Board 22
1.6 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.
1.7 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes
(excluding those in tables and figures) shall not be considered as requirements of the specification.
1
This specification is under the jurisdiction of ASTM Committee C11 on Gypsum and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.03 on Specifications for the Application of Gypsum and Other Products in Assemblies.
Current edition approved Dec. 1, 2011Dec. 1, 2013. Published January 2012January 2014. Originally approved in 1979. Last previous edition approved in 20082011 as
C840 – 08.C840 – 11. DOI: 10.1520/C0840-11.10.1520/C0840-13.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C840 − 13
1.8 The following precautionary caveat pertains only to Sections 6 – 25. 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.
1.8.1 For specific precautionary statements, see 4.1.1, 4.1.2, and 23.5.
2. Referenced Documents
2
2.1 ASTM Standards:
C11 Terminology Relating to Gypsum and Related Building Materials and Systems
C475/C475M Specification for Joint Compound and Joint Tape for Finishing Gypsum Board
C514 Specification for Nails for the Application of Gypsum Board
C557 Specification for Adhesives for Fastening Gypsum Wallboard to Wood Framing
C645 Specification for Nonstructural Steel Framing Members
C754 Specification for Installation of Steel Framing Members to Receive Screw-Attached Gypsum Panel Products
C920 Specification for Elastomeric Joint Sealants
C954 Specification for Steel Drill Screws for the Application of G
...

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SCOPE
1.1 These test methods cover procedures for determining the tensile strength of a section of portland cement-based plaster, the bond strength between portland cement-based plaster and a solid plaster base, or the fastener pull-out or lath pull-over strength for portland cement-based plaster bases over framing in either an exterior (stucco) or interior application. The test procedures are destructive in nature within the localized test areas and, after testing is concluded, require appropriate repair of the finish system as well as any underlying materials damaged during testing.  
1.2 These test methods are suitable for use on portland cement-based plaster finish systems on both new and existing construction. Test methods shall be conducted a minimum of 28 days after application of the portland cement-based plaster. Mechanical Load Test Method A and Vacuum Chamber Testing shall be used to determine the tensile strength or bond strength of direct-applied portland cement-based plaster and may be useful in evaluating the efficacy of different surface preparation characteristics, bonding agents, or both. Mechanical Load Test Method B and Vacuum Chamber Testing shall be used to determine the tensile strength of portland cement-based plaster installed over mechanically attached lath.  
1.3 These test methods are suitable for use in both laboratory and field samples. No correlation shall be made between laboratory and field testing.  
1.4 These test methods are not intended to evaluate the performance of the underlying construction or framing members. Test results on a particular building may be variable depending on the specimen location, condition, and installation, and are subject to interpretation by the test specifier.  
1.5 These test methods are not intended to evaluate the performance of coatings applied to the surface of the portland cement-based plaster.  
1.6 These test methods are not intended to be a pre-construction qualifier to determine if the surfaces are appropriate for application of portland cement plaster. The test methods are intended to be used as a tool to quantitatively evaluate existing portland cement plaster cladding that is suspected of questionable bond or uncertain fastening to the substrate.  
1.7 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.  
1.8 This standard may involve...

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ASTM
ASTM C1629/C1629M-23(Classification)
Standard Classification for Abuse-Resistant Nondecorated Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels

SIGNIFICANCE AND USE
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.
SCOPE
1.1 This standard establishes classifications of abuse resistance based on the abrasion resistance and impact resistance performance of nondecorated interior gypsum panel products and fiber-reinforced cement panels (abuse resistant wall panels).  
1.1.1 This standard is a method of classifying gypsum panel product performance and is not intended to classify systems for abuse resistance.  
1.2 The values stated in inch-pound and SI (metric) units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system shall be used independent of the other. Values from the two systems shall not be combined.  
1.3 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.  
1.4 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
ASTM C843-23(Specification)
Standard Specification for Application of Gypsum Veneer Plaster

ABSTRACT
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.
SCOPE
1.1 This specification covers the minimum requirements for and methods of applying gypsum veneer plaster.  
1.2 Where a specific degree of fire resistance is required for veneer plaster systems, applicable building code regulations shall be followed.  
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.  
1.3 Where a specific degree of sound control is required for veneer plaster 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.
Note 1: To ensure desirable results, coordinate this specification with Specification C844.
Note 2: General information regarding matters of a contractual nature concerning veneer plaster work is found in Appendix X1. Additional technical information related to veneer plastering is provided in Appendix X2.  
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.5 The text of this specification references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification.  
1.6 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.  
1.7 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
ASTM C1381/C1381M-23(Specification)
Standard Specification for Molded Glass Fiber Reinforced Gypsum Parts

ABSTRACT
This specification covers molded glass fiber reinforced gypsum (GRG) parts, which are nonload-bearing, thin-shell, ornamental shapes for architectural embellishment of interior building construction. GRG parts shall be produced using the same materials used to make the composites in conformance with the referenced specification. GRG parts shall be manufactured from the mixed slurry or alpha gypsum cement, potable water and additives, and glass fiber reinforcement using either the hand lay-up or the spray-up process in a mold. GRG parts shall be produced according to approved shop drawings. Shop drawings shall specify part dimensions, quantities, recommended attachment points and methods, reinforcements, embedments, and tolerance. The material shall conform to the required mechanical properties and to the specified dimensions and tolerances of GRG parts.
SCOPE
1.1 This specification covers molded glass fiber reinforced gypsum (GRG) parts, which are nonload-bearing, thin-shell, ornamental shapes for architectural embellishment of interior building construction.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.3 The information presented refers to the molded surface of the part.  
1.4 The text of this standard references footnotes, which provide explanatory material. These footnotes shall not be considered as requirements of the standard.  
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.

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ASTM
ASTM C841-23(Specification)
Standard Specification for Installation of Interior Lathing and Furring

ABSTRACT
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.
SCOPE
1.1 This specification covers the minimum requirements for, and the methods of application of, interior lathing and furring to receive gypsum plaster applied in accordance with Specification C842. 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.  
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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