General Construction Specifications
PART 1 - GENERAL
01 SECTION INCLUDES
A. Gypsum board on metal framing for interior ceilings.
02 REFERENCE STANDARDS
A. ASTM C36 - Specification for Gypsum Wallboard.
B. ASTM C442 - Specifications for Gypsum Backing Board and Coreboard.
C. ASTM C514 - Specifications for Nails for the Application of Gypsum Wallboard.
D. ASTM C475 - Specification for Joint Treatment Materials for Gypsum Wallboard Construction.
E. ASTM C630 - Specification for Water Resistant Gypsum Backing Board.
F. ASTM C754 - Specification for Installation of Steel Framing Members to Receive Screw - Attached Gypsum Wallboard, Backing Board, or Water-Resistant Backing Board.
G. ASTM C840 - Application and Finishing of Gypsum Board.
H. ASTM C919 - Practices for use of Sealants in Acoustical Applications.
I. ASTM C1002 - Specifications for Steel Drill Screws for Application of Gypsum Board.
J. ASTM E119 - Fire Tests of Building Construction and Materials.
1.02 QUALITY ASSURANCE
A. Employ only qualified wallboard finishers for finishing the gypsum board.
1.03 SUBMITTALS
A. Submit the following in accordance with Section 01340.
B. Manufacturer's Product Data: Indicating all technical information which specifies full compliance with requirements of this section, including installation instructions.
1.04 DELIVERY, HANDLING, STORAGE
A. Products shall be delivered to job-site bearing manufacturer's labels.
1. Handle materials in a way which will prevent damage. Comply with Section 01610.
B. Store materials inside, under cover, in a dry place.
1. Stack flat, off floor, on boards.
2. Support gypsum boards to prevent sagging.
3. Store adhesives and joint material in a warm, dry place in accordance with manufacturer's printed instructions.
4. Overloading floors is prohibited.
5. Comply with Section 01620.
1.05 JOB CONDITIONS
A. Maintain medium constant temperature (minimum 55oF) in areas where work is performed before, during, and after gypsum board and joint treatment applications.
B. Provide ventilation during and following application of adhesives and joint treatment.
C. Protect system from drying too fast.
PART 2 - PRODUCTS
03 GYPSUM BOARD
A. Gypsum Board Types/USG "SHEETROCK" Brand, as manufactured by U.S. Gypsum:
1. Regular: Tapered edges, 5/8" thick.
2. Water-Resistant: WR, tapered edges, 5/8" thick.
04 ACCESSORIES
A. Screws: USG, Type S, self-drilling, self-tapping, bugle head, screws for use with power driven screw drivers.
B. Acoustical Sealant: USG "Acoustical Sealant"
C. Joint Treatment Materials:
1. Adhesive Joint Treatment: USG "Perf-A-Tape".
2. Joint Compound: USG "Ready Mixed Compound - All Purpose".
D. Trim:
1. Outside Corner Trim: USG No. 100 Dura-A-Bead, galvanized reinforcement.
2. Control Joint: USG No. 093, galvanized.
3. Channel Trim: USG No. 200A, galvanized.
2.02 SUBSTITUTIONS
A. The following manufacturers are acceptable only after compliance with requirements of this section:
1. National Gypsum (Gold Bond).
2. Flintkote.
PART 3 - EXECUTION
05 EXAMINATION
A. Examine substrates to which drywall construction attaches or abuts for compliance with requirements for installation tolerances and other conditions affection performance of drywall construction. Do not proceed with installation until unsatisfactory conditions have been corrected.
06 CEILING BOARD INSTALLATION
A. General:
1. Coordinate gypsum board work with ceiling framing work/Section 09120 and details.
2. Ceiling framing system shall be plumb and true before starting gypsum board work. Do NOT start work until deficiencies have been corrected.
3. Verify that existing conditions are ready to receive the gypsum ceiling board work.
4. Beginning of gypsum ceiling board work means acceptance of existing conditions.
B. Install ceiling gypsum board before board is installed on walls unless walls are required to extend above ceiling.
1. Comply with manufacturer's printed instructions for installing.
3.02 INSTALLATION OF DRYWALL TRIM ACCESSORIES
A. Install corner beads at external corners.
B. Install metal edge trim whenever edge of gypsum board would otherwise be exposed or semi-exposed.
C. Install control joints at locations indicated or, if not indicated, at spacings and locations required by referenced gypsum board application and finish standard, and approved by the Architect for visual effect.
1. Where double studs are installed to create control joints, leave 1/2" separation between gypsum boards for installation of control joint units.
2. Install the specified control joint unit in accordance with manufacturer's published instructions.
3.03 GYPSUM BOARD FINISHING
A. Finish joints in accordance with gypsum board manufacturer's printed instructions.
B. After finishing is completed and before paint or wall covering is applied, inspect walls and make corrections to provide smooth surfaces free from defects.
1. Walls shall be plumb and true.
2. All corners shall be plumb and square.
END OF SECTION
