SECTION 09260
GYPSUM WALL BOARD SYSTEMS
PART 1
1.1
1.2
1.3
SUMMARY
A.
Section includes:
1.
Gypsum wallboard.
2.
Drywall finishing.
B.
Related Requirements: Section 09900 - Painting.
REFERENCES
A.
ASTM C 36-95b - Standard Specification for Gypsum Wallboard; 1995.
B.
ASTM C 475-93 - Standard Specification for Joint Compound and Joint Tape for
Finishing Gypsum Board; 1993.
C.
ASTM C 840-94 - Standard Specification for Application and Finishing of Gypsum
Board; 1994.
D.
ASTM 1002~93- Standard Specification for Steel Drill Screws for the Application
of Gypsum Board or Metal Plaster Bases; 1993.
E.
GA-214-:-90- Recommended Specification: Level of Gypsum Board Finish;
Gypsum Association; 1990.
SUBMITTALS
A.
1.4
GENERAL
Product Data: Submit manufacturer's product data for systems required, including
installation instructions and data sufficient to show compliance with requirements.
DELIVERY, STORAGE AND HANDLING
A.
Deliver materials in original and opened packages, containers, or bundles, with brand
names and manufacturer's labels intact and legible.
B.
Store materials in dry location, fully protected from weather and direct exposure to
sunlight.
C.
Stack gypsum board products flat and level, properly supported to prevent sagging or
damage to ends and edges.
D.
Store corner bead and other metal and plastic accessories to prevent bending,
sagging, distortion, or other mechanical damage.
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1.5
PROJECT CONDITIONS
09260-1
A.
Environmental Conditions: Establish and maintain environmental conditions for
applying and finishing gypsum board to comply with ASTM C 840 requirements or
gypsum board manufacturer's recommendations, whichever are more stringent. For
non-adhesive attachment of gypsum board to framing, maintain not less than 40 deg
F. For adhesive attachment and finishing of gypsum board, maintain not less than 50
deg F for 48 hours befor application and continuously after until dry. Do not exceed
95 deg F when using temporary heat sources. Ventilate building spaces as required
to dry joint treatment materials. Avoid drafts during hot, dry weather to prevent
finishing materials from drying too rapidly.
B.
Ventilation: Provide controlled ventilation during joint finishing operations, to
eliminate excessive moisture.
PART 2
2.1
PRODUCTS
GYPSUM BOARD
A.
Gypsum Wallboard: ASTM C 36: maximum lengths available to minimize end-toend butt joints in each area receiving finished gypsum board.
1.
2.
3.
B.
Moisture-Resistant Gypsum Backing Board: ASTM C 630.
1.
2.
C.
Edges: Tapered.
Thickness: 'l2 inch, except as otherwise shown or noted on drawings.
Manufacturers: Products of the following manufacturers, provided they comply with
requirements of the contract documents, will be among those considered acceptable.
1.
2.
3.
4.
5.
2.2
Fire-resistant type (Type X or equivalent) where required for fire-resistant
rated assemblies.
Edges: Tapered.
Thickness: 'l2 inch, except as otherwise shown or noted on drawings.
Centex American Gypsum Company.
Domtar Gypsum.
Georgia-Pacific Corporation.
Gold Bond Building Products, a National Gypsum Division.
USG Corporation.
TRIM AND ACCESSORIES
A.
General: Except as otherwise specifically indicated, provide trim and accessories by
manufacturer of gypsum board materials, made of galvanized steel or zinc alloy and
configured for concealment in joint compound.
HC-UI101
09260-2
1.
B.
2.3
Control Joints: At locations indicated, provide manufacturer's standard one-piece
control joints of extruded vinyl, zinc alloy, or other non-corrosive metal.
JOINT TREATMENT
A.
General: Provide products by manufacturer of gypsum boards. Comply with ASTM
C 475 and with manufacturer's recommendations for specific project conditions.
B.
Joint Tape: Manufacturer's
1.
C.
D.
PART 3
3.1
All-purpose type, for both embedding tape and as topping.
Joint Compound: At joints and fasteners in water-resistant gypsum backing board
intended for tile surfacing, provide compound specifically recommended or
permitted by manufacturer of gypsum board.
MATERIALS
General: Provide miscellaneous materials as produced and/or recommended by
manufacturer of gypsum products.
EXECUTION
EXAMINATION
A.
3.2
Joint Tape for Water-Resistant Board: If recommended by manufacturer,
provide open-weave fiberglass tape for joint treatment.
MISCELLANEOUS
A.
standard paper reinforcing tape.
Drying Type Joint Compound: Vinyl-based type for interior use, .and as follows:
1.
2.4
Include comer beads, edge trim, and other trim units necessary for project
conditions. Provide accessories as required in order to achieve details
indicated, whether or not specific accessories are shown on the drawings.
Inspection: Verify that project conditions and substrates are appropriate to begin
installation of work of this section.
INSTALLATION OF GYPSUM BOARD
A.
General: Comply with ASTM C 840 and GA-216 except where exceeded by other
requirements.
1.
2.
3.
4.
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Wherever possible, install gypsum board to minimize butt end joints.
Install wallboards in a manner that will minimize butt end joints in center of
wall area. Stagger vertical joints on opposite sides of walls.
Butt all joints loosely, with maximum of 1/16 inch between boards.
. Place wrapped edges adjacent to one another, do not place cut edges or butt
ends adjacent to wrapped edges.
09260-3
5.
B.
Control Joints: Form controljoints by means of'i4 inch space between adjacent
gypsum boards, with each edge supported on separate framing member, ready to
receive trim accessory.
1.
C.
3.3
3.4
Not more than 30 feet apart on walls that are not intersected by other walls
for 50 feet ormore.
Installation on Wood Framing:
1.
D.
Support all edges and ends of each board on framing or by solid substrate,
except that long edges at right angles to framing members in non-fire-rated
construction may be left unsupported.
Install gypsum board by screw attachment.
Installation of Water-Resistant Backing Board:
1.
Install moisture-resistant gypsum backing board at "wet" locations such as
restroom plumbing walls.
2.
Install moisture-resistant gypsum backing board in accordance with
manufacturer's recommendations, including minimum clearances and sealing
of penetrations and edges. Do not install water-resistant backing board on
ceilings or over vapor retarders.
INSTALLATION OF TRIM AND ACCESSORIES
A.
General: Comply with manufacturer's recommendations for installation of trim
items. Except for items intended by manufacturer to be left exposed or semiexposed, install trim for concealment in joint finishing compound. Wherever
possible, fasten metal trim to substrate with same fasteners used to install gypsum
board products.
B.
Corner Bead: Install metal corner bead at all external comers unless details clearly
indicate its omission at specific locations.
C.
Edge Trim: Install edge trim at locations indicated and wherever edge of gypsum
board otherwise would be exposed.
D.
Control Joints: Install one-piece control joints at required locations. Do not remove
tape until finishing operations are complete.
FINISHING
A.
General: Comply with ASTM C 848 and GA-216 except where exceeded by other
requirements.
1.
HC-UI101
Do not mix joint compounds except as specifically recommended by
manufacturer.
09260-4
B.
Finish gypsum board in accordance with the following level of finish per GA-2l4,
except where indicated otherwise on the drawings.
1.
C.
Joint Treatment: Tape and finishjoints in accordance with manufacturer's
instructions for compounds used, using proper hand tools designed for the purpose.
1.
D.
3.5
Level 4: Embed tape in joint compound at all joints and interior angles.
Provide three separate coats of compound at all joints, angles, fastener heads,
and accessories. Provide smooth surfaces free of tool marks and ridges.
Avoid raising nap of face paper when sanding; carefully sponge down any
areas roughened by sanding process.
.
Penetrations:
compound.
Fill cutouts and openings around fixtures and penetrations withjoint
CLEANING
A.
Promptly remove any residual gypsum drywall materials from adjacent or adjoining
surfaces, leaving spaces ready for subsequent finishing operations and decorating.
END OF SECTION
HC-DIlOl
09260-5
SECTION 09660
RESILIENT TILE FLOORING
PART 1
1.1
GENERAL
SUMMARY
A.
Section includes:
1.
2.
3.
1.2·
1.3
1.4
REFERENCES
A.
ASTM E 84-96a - Standard Test Method for Surface Burning Characteristics of
Building Materials; 1996.
B.
ASTM E 662-93a - Standard Test Method for Specific Optical Density of Smoke
Generated by Solid Materials; 1993.
C.
FS SS-T-312B - Tile, Floor: Asphalt, Rubber, Vinyl and Vinyl Composition: 1974
(Amendment-l(YD) 1979 and Re-approved 1990).
SUBMITTALS
A.
Product Data: Submit manufacturer's technical data sheets for review.
B.
Samples: Submit full size samples of floor for approval by Developer.
C.
Maintenance Procedures: Submit manufacturer's published instructions for care and
cleaning of resilient flooring products specified.
QUALITY ASSURANCE
A.
Provide resilient flooring complying to the following:
1.
2.
3.
PART 2
2.1
Vinyl Sheet Flooring.
Vinyl Underlayment Board.
Rubber Reducer Strips
Flame Spread: ASTM E 84; maximum 75.
Smoke Developed: ASTM E 84: maximum 450.
Smoke Density: ASTM E 662; maximum 450.
PRODUCTS
TILE FLOORING MATERIALS
A.
Vinyl Sheet Flooring.
Armstrong Residential Sheet Vinyl Flooring or an equivalent approved by the
Developer and Owner. Color and Pattern to be selected by Owner.
B.
2.2
MISCELLANEOUS
Adhesive: Type recommended by manufacturer of resilient product for specific
substrate conditions.
B.
Sealers or Polishes: Types recommended by flooring manufacturer.
C.
Rubber Reducer Strips: Roppe or an equivalent approved by the Architect and
Developer. Color to be selected by Owner from Manufacturers standard colors.
EXECUTION
EXAMINATION
A.·
3.2
General: Inspect substrates and conditions of installation to verify that work may
properly commence. Do not proceed with the work until unsatisfactory conditions
have been corrected. Comply with manufacturer's recommendations for preparation
of floor areas.
PREPARATION
A.
Substrates: Fill minor depressions, cracks, and other irregularities with patching
compound.
1.
2.
3.3
3.4
ACCESSORIES
A.
PART 3
3.1
Sheet Vinyl Underlayment Board: Provide Y4" "Luan" or equivalent as
recommended by sheet vinyl manufacturer.
Remove paint, curing compounds, and other materials that could interfere
with adhesion of resilient products.
Sweep or vacuum clean substrate immediately prior to beginning installation
in each area.
GENERAL INSTALLATION REQUIREMENTS
A.
Comply with manufacturer's published recommendations for installation. Cut and fit
tightly to fixtures, pipes, and other obstructions, as well as to walls and partitions.
B.
Tightly adhere resilient flooring to substrate without raised or blistered areas. Spread
adhesive evenly, so that final installation will be without telegraphed markings from
adhesive or substrate.
SHEET VINYL INSTALLATION
A.
HC-U1101
Install sheet vinyl in strict accordance with manufacturers written instructions and
recommendations.
09660-2
3.6
A.
Initial Cleaning: Remove excess and waste materials promptly, and sweep or
vacuum clean resilient flooring as soon as installation has been completed in each
area. After adhesive has had adequate time to set, mop each area with damp mop
and mild detergent.
B.
Final Cleaning: Remove scuff marks, excess adhesive, and other foreign substances,
using only cleaning products and techniques recommended by manufacturer of
resilient products.
PROTECTION
A.
Construction Period: Cover traffic routes across completed resilient flooring with
plywood, hardboard, or other durable material to protect against damage from loaded
dollies and other construction trash.
B.
Final Protection: Cover resilient floor surface with non-staining building paper until
substantial completion in each area.
END OF SECTION
HC-UUOl
09660-3