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GYPSUM BOARD
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SECTION 09 2900
GYPSUM BOARD
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Interior gypsum board.
2. Tile backing panels.
3. Steel and aluminum trim accessories.
4. Sound attenuation blanket insulation.
5. Acoustical sealant concealed in gypsum board assemblies.
B. Related Requirements:
1. Section 01 8113.13 “Sustainable Design Requirements” for general requirements and
procedures for compliance with certain USGBC LEED prerequisites and credits.
2. Section 06 1000 “Rough Carpentry” for wood framing.
3. Section 06 1600 "Sheathing" for gypsum sheathing for exterior walls.
4. Section 07 8413 “Penetration Firestopping" for firestopping through penetrations in fire-
rated gypsum partitions.
5. Section 07 8443 “Joint Firestopping" for firestopping perimeter joints in fire-rated gypsum
partitions.
6. Section 07 9200 “Joint Sealants" for exposed joint sealants in non-fire-rated gypsum
partitions.
7. Section 07 9219 “Acoustical Joint Sealants" for exposed acoustical joint sealants in non-
fire-rated gypsum partitions.
8. Section 09 2216 "Non-Structural Metal Framing" for non-structural steel framing and
suspension systems that support gypsum board panels.
9. Section 09 9100 "Painting" for field applied finishes for gypsum board panels.
10. Section 10 2600 “Wall And Door Protection” for surface-mounted metal corner guards.
1.3 ACTION SUBMITTALS
A. Make Submittals in accordance with Section 01 3300 “Submittal Procedures.”
B. Product Data: For each type of product.
C. Sustainable Design Submittals:
1. Environmental Product Declaration (EPD): Provide manufacturers’ product
documentation for each product having an Environmental Product Declaration (EPD).
a. Documentation should confirm EPD conforms with ISO 14205 EN 15804 or ISO
21930.
b. EPD shall have at least Cradle to Gate scope.
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c. Complete "LEED Materials Documentation Sheet" with MRc2 information for each
product having an EPD.
2. Recycled Content: Provide manufacturers’ product documentation that includes recycled
content claims for the products contributing towards compliance. Claims must conform to
the definition in ISO 14021-1999, Environmental Labels and Declarations, Self-Declared
Environmental Claims.
a. Complete "LEED Materials Documentation Sheet" with MRc3 Option 2 information
for products with recycled content installed in the building.
3. Health Product Declaration (HPD): Provide manufacturers’ product documentation for
each product having a publically available material inventory down to at least 0.1 percent
or 1000 ppm.
a. Documentation should be in the form of one of the following:
1) A publically available inventory of all ingredients identified by name and
Chemical Abstract Service Registration Number (CASRN).
2) A published, complete Health Product Declaration in compliance with the
Health Product Declaration open Standard.
3) Material Health Certificate or Cradle to Cradle Certification under standard
version 3 or later with a Material Health Achievement level at the Bronze
level or higher.
4) A Declare product label indicating that all ingredients have been evaluated
and disclosed down to 1000 ppm.
5) Cradle to Cradle Material Health Certificate at the Bronze Level or higher.
b. Complete "LEED Materials Documentation Sheet" with MRc2 information for each
product having an EPD.
4. Adhesives And Sealants: Provide manufacturers' or third-party certification of testing to
and compliance with the California Department of Public Health (CDPH) Standard
method v1.2-2017, that includes the following information:
a. The exposure scenario used to determine compliance.
b. The range of total VOCs after 14 days, measured as specified in the CDPH
Standard Method v1.2:
1) 0.5 mg/m^3 or less;
2) Between 0.5 and 5.0 mg/m^3; or
3) 5.0 mg/m^3 or more.
c. Laboratory accreditation under ISO/IEC 17025.
d. Claims of compliance for wet-applied products must state the amount applied in
mass per surface area.
e. Provide MSDS or other manufacturer documentation with disclosure of VOC
content for all wet-applied products.
f. Complete "LEED Materials Documentation Sheet" with IEQc2 information for
adhesives/sealants installed within the waterproofing membrane.
5. Paints And Coatings: Provide manufacturers' or third-party certification of testing to and
compliance with the California Department of Public Health (CDPH) Standard method
v1.2-2017 that includes the following information:
a. The exposure scenario used to determine compliance.
b. The range of total VOCs after 14 days, measured as specified in the CDPH
Standard Method v1.2:
1) 0.5 mg/m^3 or less;
2) Between 0.5 and 5.0 mg/m^3; or
3) 5.0 mg/m^3 or more.
c. Laboratory accreditation under ISO/IEC 17025.
d. Claims of compliance for wet-applied products must state the amount applied in
mass per surface area.
e. Provide MSDS or other manufacturer documentation with disclosure of VOC
content for all wet-applied products.
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f. Complete "LEED Materials Documentation Sheet" with IEQc2 information for
paints/coatings installed within the waterproofing membrane.
6. Wall Panels: Provide manufacturers' or third-party certification of testing to and
compliance with the California Department of Public Health (CDPH) Standard method
v1.2-2017 that includes the following information:
a. The exposure scenario used to determine compliance.
b. The range of total VOCs after 14 days, measured as specified in the CDPH
Standard Method v1.2:
1) 0.5 mg/m^3 or less;
2) Between 0.5 and 5.0 mg/m^3; or
3) 5.0 mg/m^3 or more.
c. Laboratory accreditation under ISO/IEC 17025.
d. Claims of compliance for wet-applied products must state the amount applied in
mass per surface area.
e. Complete "LEED Materials Documentation Sheet" with IEQc2 information for wall
panels installed within the waterproofing membrane.
D. Samples for Verification: For the following products:
1. Trim Accessories: Full-size Sample in 12-inch- long length for each trim accessory
indicated.
1.4 QUALITY ASSURANCE
A. Mockups: Build mockups of at least 100 sq. ft. in surface area to demonstrate aesthetic effects
and to set quality standards for materials and execution.
1. Build mockups for the following:
a. Each level of gypsum board finish indicated for use in exposed locations.
b. Each texture finish indicated.
2. Apply or install final decoration indicated, including painting and wallcoverings, on
exposed surfaces for review of mockups.
3. Simulate finished lighting conditions for review of mockups.
4. Subject to compliance with requirements, approved mockups may become part of the
completed Work if undisturbed at time of Substantial Completion.
1.5 DELIVERY, STORAGE AND HANDLING
A. Store materials inside under cover and keep them dry and protected against weather,
condensation, direct sunlight, construction traffic, and other potential causes of damage. Stack
panels flat and supported on risers on a flat platform to prevent sagging.
1.6 FIELD CONDITIONS
A. Environmental Limitations: Comply with ASTM C 840 requirements or gypsum board
manufacturer's written instructions, whichever are more stringent.
B. Do not install paper-faced gypsum panels until installation areas are enclosed and conditioned.
C. Do not install panels that are wet, moisture damaged, and mold damaged.
1. Indications that panels are wet or moisture damaged include, but are not limited to,
discoloration, sagging, or irregular shape.
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2. Indications that panels are mold damaged include, but are not limited to, fuzzy or
splotchy surface contamination and discoloration.
PART 2 - PRODUCTS
2.1 LEED REQUIREMENTS
A. Environmental Product Declaration (EPD): Provide products with Third Party Environmental
Product Declaration (EPD) whenever available.
B. Recycled Content: Provide products with the maximum recycled content possible. Minimum
recycled content 20 percent.
C. Health Product Declaration (HPD): Provide products with publically available material
inventories whenever available.
D. Adhesives And Sealants: For field applications that are inside the weatherproofing membrane:
Adhesives/sealants must be tested and determined compliant in accordance with California
Department of Public Health (CDPH) Standard Method v1.2-2017, using the applicable
exposure scenario. The default scenario is the private office scenario.
1. All adhesives/sealants wet-applied on site must meet the applicable chemical content
requirements of SCAQMD Rule 1168, October 6, 2017, Adhesive and Sealant
Applications, as analyzed by the methods specified in Rule 1168. The provisions of
SCAQMD Rule 1168 do not apply to adhesives and sealants subject to state or federal
consumer product VOC regulations.
E. Paints And Coatings: For field applications that are inside the weatherproofing membrane:
Paints and Coatings must be tested and determined compliant in accordance with California
Department of Public Health (CDPH) Standard Method v1.2-2017, using the applicable
exposure scenario. The default scenario if the private office scenario.
1. All paints and coatings wet-applied on site must meet the applicable VOC limits of the
California Air Resources Board (CARB) 2007, Suggested Control Measure (SCM) for
Architectural Coatings, or the South Coast Air Quality Management District (SCAQMD)
Rule 1113, effective February 5, 2016.
F. Wall Panels: Wall panel products must be tested and determined compliant in accordance with
California Department of Public Health (CDPH) Standard Method v1.2-2017, using the
applicable exposure scenario. The default scenario if the private office scenario.
2.2 PERFORMANCE REQUIREMENTS
A. Fire-Resistance-Rated Assemblies: For fire-resistance-rated assemblies, provide materials and
construction identical to those tested in assembly indicated according to ASTM E 119 by an
independent testing agency.
B. STC-Rated Assemblies: For STC-rated assemblies, provide materials and construction
identical to those tested in assembly indicated according to ASTM E 90 and classified according
to ASTM E 413 by an independent testing agency.
C. Ceiling and wall materials shall comply with the requirements of the California Department of
Public Health's "Standard Method for the Testing and Evaluation of Volatile Organic Chemical
Emissions from Indoor Sources Using Environmental Chambers."
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GYPSUM BOARD
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2.3 GYPSUM BOARD, GENERAL
A. Manufacturers: Subject to compliance with requirements, manufacturers offering products that
may be incorporated into the Work include, but are not limited to the following or equal:
1. American Gypsum.
2. CertainTeed Corp.
3. Georgia-Pacific Gypsum LLC.
4. National Gypsum Company.
5. PABCO Gypsum.
6. USG Corporation.
B. Size: Provide maximum lengths and widths available that will minimize joints in each area and
that correspond with support system indicated.
2.4 INTERIOR GYPSUM BOARD
A. Gypsum Wallboard (GWB): ASTM C 1396/C 1396M.
1. Thickness: As indicated on Drawings.
2. Long Edges: Tapered.
B. Gypsum Board, Type X (GWB): ASTM C 1396/C 1396M.
1. Thickness: As indicated on Drawings.
2. Long Edges: Tapered.
C. Abuse-Resistant Gypsum Board (ARGWB): ASTM C 1629/C 1629M, Level 2.
1. Core: As indicated on Drawings.
2. Long Edges: Tapered.
3. Mold Resistance: ASTM D 3273, score of 10 as rated according to ASTM D 3274.
2.5 TILE BACKING PANELS
A. Cementitious Backer Units: ANSI A118.9 and ASTM C 1288 or 1325, with manufacturer's
standard edges.
1. Products: Subject to compliance with requirements, available products that may be
incorporated into the Work include, but are not limited to the following or equal:
a. C-Cure; C-Cure Board 990.
b. CertainTeed Corp.; FiberCement BackerBoard.
c. Custom Building Products; Wonderboard.
d. National Gypsum Company, Permabase Cement Board.
e. USG Corporation; DUROCK Cement Board.
2. Thickness: 5/8 inch.
3. Mold Resistance: ASTM D 3273, score of 10 as rated according to ASTM D 3274.
B. Water-Resistant Gypsum Backing Board: ASTM C 1396/C 1396M, with manufacturer's
standard edges.
1. Thickness and Core: 5/8 inch, Type X.
2.6 TRIM ACCESSORIES
A. Interior Trim: ASTM C 1047.
1. Material: Galvanized or aluminum-coated steel sheet or rolled zinc.
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2. Shapes:
a. Cornerbead.
b. LC-Bead: J-shaped; exposed long flange receives joint compound.
c. L-Bead: L-shaped; exposed long flange receives joint compound.
d. Expansion (control) joint.
B. Aluminum Trim: Extruded accessories of profiles and dimensions indicated.
1. Manufacturers: Subject to compliance with requirements, manufacturers offering
products that may be incorporated into the Work include, but are not limited to, the
following or equal:
a. Fry Reglet Corp.
b. Gordon, Inc.
c. Pittcon Industries.
2. Aluminum: Alloy and temper with not less than the strength and durability properties of
ASTM B 221, Alloy 6063-T5.
3. Products:
a. Corner Trim (CG-1): Pittcon Softforms LLC; Softforms Corner with Reveal Model
No. SO-ER-90 or equal.
1) Finish: Clear anodized.
b. Corner Trim (CG-2): Fry Reglet Corp; Corner Trim No. DMCT-375 or equal.
1) Finish: Factory primed.
c. Other products as indicated on Drawings.
2.7 JOINT TREATMENT MATERIALS
A. General: Comply with ASTM C 475/C 475M.
B. Joint Tape:
1. Interior Gypsum Board: Paper.
2. Tile Backing Panels: As recommended by panel manufacturer.
C. Joint Compound for Interior Gypsum Board: For each coat use formulation that is compatible
with other compounds applied on previous or for successive coats.
1. Prefilling: At open joints and damaged surface areas, use setting-type taping compound.
2. Embedding and First Coat: For embedding tape and first coat on joints, fasteners, and
trim flanges, use setting-type taping compound.
a. Use setting-type compound for installing paper-faced metal trim accessories.
3. Fill Coat: For second coat, use setting-type, sandable topping compound.
4. Finish Coat: For third coat, use setting-type, sandable topping compound.
D. Joint Compound for Tile Backing Panels:
1. Water-Resistant Gypsum Backing Board: Use setting-type taping compound and setting-
type, sandable topping compound.
2. Cementitious Backer Units: As recommended by backer unit manufacturer.
2.8 AUXILIARY MATERIALS
A. Provide auxiliary materials that comply with referenced installation standards and
manufacturer's written instructions.
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B. Steel Drill Screws: ASTM C 1002 unless otherwise indicated.
1. Use screws complying with ASTM C 954 for fastening panels to steel members from
0.033 to 0.112 inch thick.
2. For fastening cementitious backer units, use screws of type and size recommended by
panel manufacturer.
C. Sound-Attenuation Blankets: ASTM C 665, Type I (blankets without membrane facing)
produced by combining thermosetting resins with mineral fibers manufactured from glass, slag
wool, or rock wool.
1. Fire-Resistance-Rated Assemblies: Comply with mineral-fiber requirements of assembly.
2. Recycled Content: Postconsumer recycled content plus one-half of preconsumer
recycled content not less than 30 percent.
D. Sound Attenuation Blanket Insulation: Mineral-wool blanket, unfaced, ASTM C 665, Type I
(blankets without membrane facing); consisting of fibers; with maximum flame-spread and
smoke-developed indexes of 25 and 50, respectively, per ASTM E 84; passing ASTM E 136 for
combustion characteristics.
1. Manufacturers: Subject to compliance with requirements, manufacturers offering
products that may be incorporated into the Work include, but are not limited to the
following or equal:
a. Johns Manville; a Berkshire Hathaway company.
b. Rockwool International.
c. Thermafiber, Inc.; an Owens Corning company.
E. Acoustical Sealant: Manufacturer's standard nonsag, paintable, nonstaining latex sealant
complying with ASTM C 834. Product effectively reduces airborne sound transmission through
perimeter joints and openings in building construction as demonstrated by testing representative
assemblies according to ASTM E 90.
1. Products: Subject to compliance with requirements, products that may be incorporated
into the Work include, but are not limited to the following or equal:
a. Accumetric LLC; BOSS 824 Acoustical Sound Sealant.
b. Grabber Construction Products; Acoustical Sealant GSC.
c. Pecora Corporation; AC-20 FTR or AIS-919.
d. Specified Technologies, Inc.; Smoke N Sound Acoustical Sealant.
e. USG Corporation; SHEETROCK Acoustical Sealant.
2. Sealant shall have a VOC content of 250 g/L or less.
3. Sealant shall comply with the testing and product requirements of the California
Department of Public Health's "Standard Method for the Testing and Evaluation of
Volatile Organic Chemical Emissions from Indoor Sources Using Environmental
Chambers."
F. Polyethylene Vapor Retarders Behind Cementitious Backer Units: ASTM D 4397, 6-mil-thick
sheet, with maximum permeance rating of 0.1 perm.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine areas and substrates including welded hollow-metal frames and support framing, with
Installer present, for compliance with requirements and other conditions affecting performance
of the Work.
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B. Examine panels before installation. Reject panels that are wet, moisture damaged, and mold
damaged.
C. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 APPLYING AND FINISHING PANELS, GENERAL
A. Comply with ASTM C 840.
B. Install ceiling panels across framing to minimize the number of abutting end joints and to avoid
abutting end joints in central area of each ceiling. Stagger abutting end joints of adjacent
panels not less than one framing member.
C. Install panels with face side out. Butt panels together for a light contact at edges and ends with
not more than 1/16 inch of open space between panels. Do not force into place.
D. Locate edge and end joints over supports, except in ceiling applications where intermediate
supports or gypsum board back-blocking is provided behind end joints. Do not place tapered
edges against cut edges or ends. Stagger vertical joints on opposite sides of partitions. Do not
make joints other than control joints at corners of framed openings.
E. Form control and expansion joints with space between edges of adjoining gypsum panels.
F. Cover both faces of support framing with gypsum panels in concealed spaces (above ceilings),
except in chases braced internally.
1. Unless concealed application is indicated or required for sound, fire, air, or smoke
ratings, coverage may be accomplished with scraps of not less than 8 sq. ft. in area.
2. Fit gypsum panels around ducts, pipes, and conduits.
3. Where partitions intersect structural members projecting below underside of floor/roof
slabs and decks, cut gypsum panels to fit profile formed by structural members; allow
1/4- to 3/8-inch- wide joints to install sealant.
G. Isolate perimeter of gypsum board applied to non-load-bearing partitions at structural
abutments. Provide 1/4- to 1/2-inch- wide spaces at these locations and trim edges with edge
trim where edges of panels are exposed. Seal joints between edges and abutting structural
surfaces with acoustical sealant.
H. Attachment to Steel Framing: Attach panels so leading edge or end of each panel is attached
to open (unsupported) edges of stud flanges first.
I. STC-Rated Assemblies: Seal construction at perimeters, behind control joints, and at openings
and penetrations with a continuous bead of acoustical sealant. Install acoustical sealant at both
faces of partitions at perimeters and through penetrations. Comply with ASTM C 919 and with
manufacturer's written instructions for locating edge trim and closing off sound-flanking paths
around or through assemblies, including sealing partitions above acoustical ceilings.
J. Install sound attenuation blankets before installing gypsum panels unless blankets are readily
installed after panels have been installed on one side.
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3.3 APPLYING INTERIOR GYPSUM BOARD
A. Install interior gypsum board in the following locations:
1. Wallboard Type: As indicated on Drawings.
2. Type X: As indicated on Drawings.
3. Abuse-Resistant Type: As indicated on Drawings.
B. Single-Layer Application:
1. On ceilings, apply gypsum panels before wall/partition board application to greatest
extent possible and at right angles to framing unless otherwise indicated.
2. On partitions/walls, apply gypsum panels vertically (parallel to framing) unless otherwise
indicated or required by fire-resistance-rated assembly, and minimize end joints.
a. Stagger abutting end joints not less than one framing member in alternate courses
of panels.
b. At stairwells and other high walls, install panels horizontally unless otherwise
indicated or required by fire-resistance-rated assembly.
3. On Z-shaped furring members, apply gypsum panels vertically (parallel to framing) with
no end joints. Locate edge joints over furring members.
4. Fastening Methods: Apply gypsum panels to supports with steel drill screws.
C. Multilayer Application:
1. On ceilings, apply gypsum board indicated for base layers before applying base layers on
walls/partitions; apply face layers in same sequence. Apply base layers at right angles to
framing members and offset face-layer joints one framing member, 16 inches minimum,
from parallel base-layer joints, unless otherwise indicated or required by fire-resistance-
rated assembly.
2. On partitions/walls, apply gypsum board indicated for base layers and face layers
vertically (parallel to framing) with joints of base layers located over stud or furring
member and face-layer joints offset at least one stud or furring member with base-layer
joints unless otherwise indicated or required by fire-resistance-rated assembly. Stagger
joints on opposite sides of partitions.
3. On Z-shaped furring members, apply base layer vertically (parallel to framing) and face
layer either vertically (parallel to framing) or horizontally (perpendicular to framing) with
vertical joints offset at least one furring member. Locate edge joints of base layer over
furring members.
4. Fastening Methods: Fasten base layers and face layers separately to supports with
screws.
3.4 APPLYING TILE BACKING PANELS
A. Cementitious Backer Units: ANSI A108.11, at wet locations indicated to receive tile.
1. Polyethylene Vapor Retarders Behind Cementitious Backer Units:
a. Place vapor retarders behind cementitious backer units.
b. Extend vapor retarders to extremities of areas to protect from vapor transmission.
Secure vapor retarders in place with adhesives, vapor retarder fasteners, or other
anchorage system as recommended by manufacturer.
c. Seal vertical joints in vapor retarders over framing by lapping no fewer than two
studs and sealing with vapor-retarder tape according to vapor-retarder
manufacturer's written instructions. Locate all joints over framing members or
other solid substrates.
d. Seal joints caused by pipes and similar items penetrating vapor retarders with
vapor-retarder tape to create an airtight seal between penetrating objects and
vapor retarders.
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e. Repair tears or punctures in vapor retarders immediately before concealment by
cementitious backer units. Cover with vapor-retarder tape or another layer of
vapor retarders.
B. Water-Resistant Backing Board: Install where indicated with 1/4-inch gap where panels abut
other construction or penetrations.
C. Where tile backing panels abut other types of panels in same plane, shim surfaces to produce a
uniform plane across panel surfaces.
3.5 INSTALLING TRIM ACCESSORIES
A. For trim with back flanges intended for fasteners, attach to framing with same fasteners used for
panels. Otherwise, attach trim according to manufacturer's written instructions.
B. Control Joints: Install control joints at locations indicated on Drawings or, if not indicated,
according to ASTM C 840 and in specific locations approved by Architect for visual effect.
C. Interior Trim: Install in the following locations:
1. Cornerbead: Use at outside corners unless otherwise indicated.
2. L-Bead: Use at exposed panel edges.
3. LC-Bead: Use where indicated.
4. U-Bead: Use where indicated.
D. Aluminum Trim: Install in locations indicated on Drawings.
3.6 FINISHING GYPSUM BOARD
A. Treat gypsum board joints, interior angles, edge trim, control joints, penetrations, fastener
heads, surface defects, and elsewhere as required to prepare gypsum board surfaces for
decoration. Promptly remove residual joint compound from adjacent surfaces.
B. Prefill open joints and damaged surface areas.
C. Apply joint tape over gypsum board joints, except for trim products specifically indicated as not
intended to receive tape.
D. Cut gypsum board around recessed boxes, including but not limited to dryer exhaust boxes,
washer water valve boxes, refrigerator water valve boxes, and receptacles. Apply tape and joint
compound over joints between gypsum board and recessed boxes.
E. Gypsum Board Finish Levels: Finish panels to levels indicated below and according to
ASTM C 840:
1. Level 1: Ceiling plenum areas, concealed areas, and where indicated.
2. Level 2: Panels that are substrate for tile.
3. Level 4: At panel surfaces that will be exposed to view unless otherwise indicated.
a. Primer and its application to surfaces are specified in Section 09 9100 "Painting."
4. Level 5: Where indicated on Drawings.
a. Primer and its application to surfaces are specified in Section 09 9100 "Painting."
F. Cementitious Backer Units: Finish according to manufacturer's written instructions.
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3.7 PROTECTION
A. Protect adjacent surfaces from drywall compound and promptly remove from floors and other
non-drywall surfaces. Repair surfaces stained, marred, or otherwise damaged during drywall
application.
B. Protect installed products from damage from weather, condensation, direct sunlight,
construction, and other causes during remainder of the construction period.
C. Remove and replace panels that are wet, moisture damaged, and mold damaged.
1. Indications that panels are wet or moisture damaged include, but are not limited to,
discoloration, sagging, or irregular shape.
2. Indications that panels are mold damaged include, but are not limited to, fuzzy or
splotchy surface contamination and discoloration.
END OF SECTION
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