SEQUENCING AND SCHEDULING

A. Sequence installation of exterior gypsum sheathing so sheathing will not be left exposed longer than manufacturer's recommendations or 180 days, whichever is less, prior to installation of exterior cladding.

1.06 WARRANTY

A. Furnish Manufacturer’s standard 10 year limited warranty covering defects in manufacturing and materials and minimum 6 month exposure warranty stating that

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2.01 MANUFACTURERS

A. Furnish products of one of the following Manufacturers, except as approved by the Architect, subject to compliance with Specification requirements:

1. Georgia-Pacific www.gp.com 2. USG www.usg.com

3. Certain Teed (BPB Gypsum) www.certainteed.com 4. Temple-Inland www.templeinland.com

5. American Gypsum www.americangypsum.com 2.02 MATERIALS

A. Glass Matt Exterior Sheathing Board: Glass-mat sheathing complying with ASTM C1177.

1. Thickness: 1/2 inch at non-fire resistant rated assemblies and 5/8 inch (Fireguard product) at fire resistant rated assemblies, or as otherwise indicated on Drawings.

2. Acceptable Products: Subject to compliance with requirements, provide one of the following:

a. Dens-Glass Gold Sheathing, G-P Gypsum b. GlasRoc Sheathing, CertainTeed

c. Securock Glass-Mat Sheathing, USG

d. GreenGlass Fiberglass-Faced Gypsum Sheathing, Temple-Inland 2.03 ACCESSORIES

A. Fasteners: Type S-12, bugle head, self-tapping, with organic-polymer or other protective coating, and as follows:

1. Provide steel drill screws complying with ASTM C1102 to attach sheathing to steel framing less than 0.03 inch thick.

2. Provide steel drill screws complying with ASTM C954 to attach sheathing to steel framing from 0.03 inch to 0.0112 inch thick.

3. Length: As recommended to penetrate metal framing minimum depth as recommended by sheathing manufacturer.

B. Joint Treatment Materials:

1. Joint Sealant: Silicone emulsion sealant complying with ASTM C834 and compatible with sheathing and sheathing tape as recommended by the sheathing manufacturer. Provide one of the following:

a. Dow Corning 795 Building Sealant b. Pecora 895

2. Glass Fiber Sheathing Tape: Provide self-adhering glass-fiber tape, 2 inch minimum width 10 x 10 mesh. As recommended by the sheathing manufacturer.

3. Refer to Section 07 24 00 for joint treatment at EIFS.

C. Continuous Vented Soffit Vents: Continuous linear soffit vent with insect screen, width as indicated on drawings by depth to suite soffit sheathing and indicated finish; 6063 T5 extruded aluminum or electro-galvanized steel, baked-on primer finish. Provide products

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E. Butyl Rubber Flashing Membrane: Grace Vycor Butyl, Grace Construction Products, self-adhering, butyl rubber based adhesive and polyethylene flashing, 6 inch or 9 inch widths as appropriate for flashing condition.

1. Primer: Perm-A-Barrier WB Primer, Grace Construction Products.

PART 3 EXECUTION 3.01 EXAMINATION

A. Verification of Conditions: Examine subsurfaces to receive Work and report detrimental conditions in writing to Architect. Commencement of Work will be construed as acceptance of subsurfaces.

B. Verify that surface of framing members do not vary more than 1/4 inch from the plane of faces of adjacent members.

C. Coordination: Coordinate with other work which affects, connects with, or will be concealed by this Work.

3.02 INSTALLATION

A. Glass Matt Exterior Sheathing Board:

1. Install in accordance with GA-253, ASTM C1280, manufacturer’s printed instructions, and IBC requirements.

2. Verify that surface of framing members do not vary from more than 1/4 inch from the plane of faces of adjacent members.

3. Install with logo side out.

4. End joints shall be offset. Joints should fit snug and flashing installed around openings.

5. Panels of the maximum length possible shall be used to minimize the number of joints. Edge joints must be located parallel to and with vertical orientations on framing. End joints of adjacent lengths of sheathing must be staggered.

6. Cut boards at penetrations, edges and other obstructions; and fit tightly against abutting construction, unless otherwise indicated.

a. Install boards with 3/8 inch setback where non-load-bearing construction abuts structural elements.

b. Install boards with 1/4 inch setback where they abut masonry or similar materials that might retain moisture, to prevent wicking.

c. Allow no joints greater than 3/8 inch.

7. Coordinate sheathing installation with flashing and joint-sealant installation so these materials are installed in sequence and manner that prevents exterior moisture from passing through completed exterior wall assembly.

8. Attach sheathing to metal framing with screws spaced 8 inches o.c. at perimeter and 8 inches o.c. in field.

9. Fasteners must be driven so as to bear tight against and flush with surface of sheathing. Fasteners must not be countersunk.

10. Fasteners must be located a minimum of 3/8 inch and maximum of 1 inch from edges and ends of sheathing panels.

11. Do not bridge building expansion joints with sheathing; cut and space edges to

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centers of stud flanges and stagger end joints of adjacent boards not less than one stud spacing, two where possible. Screw-attach boards at perimeter and within field of board to each steel stud as follows:

1. Fasteners spaced maximum of 8 inches o.c. and set back 3/8 inch minimum, 1 inch maximum from edges and ends of boards.

C. Vertical Installation: Install 4-foot-wide gypsum sheathing boards vertically with vertical edges centered over flanges of steel studs. Abut ends and edges of each board with those of adjoining boards. Screw-attach boards at perimeter and within field of board to each steel stud as follows:

1. Fasteners spaced maximum 8 inches o.c. along perimeter and in the field of the board, and set back 3/8 inch minimum, 1 inch maximum from edges and ends of boards.

D. Joint Treatment: Treat joints in accordance with the sheathing manufacturer's written recommendations and as follows:

1. Apply 2-inch self-adhering glass-fiber sheathing tape to glass-mat gypsum sheathing board joints overlapping at intersections by width of tape. Apply 3/8 inch bead of silicone emulsion sealant along the joint and trowel embed sealant into entire face of tape. Apply sealant to exposed fasteners with a trowel so fasteners are completely covered. Seal other penetrations and openings.

2. As recommended by Exterior Insulation and Finish system manufacturer. Apply joint tape over joints and embed in setting type joint compound. Skim coat entire surface with setting type joint compound. Refer to Section 07 24 00 for joint treatment at Exterior Insulation and Finish System.

E. Ceiling Soffit Applications: Install with long edges in contact with edges of adjacent boards without forcing. Abut ends of boards over centers of stud flanges and stagger end joints of adjacent boards not less than one stud spacing. Attach boards at perimeter and within field of board to each stud.

1. Space fasteners a maximum of 8 inches o.c., or tighter where recommended by sheathing manufacturer, and a minimum of 3/8 inch from edges and ends of boards.

2. Apply joint tape over joints and embed in setting type joint compound. Skim coat entire surface with setting type joint compound for smooth finish, except where ceiling or soffit board serves as a base to another applied finish (EIFS, etc.).

F. Flashing Membrane: Apply flashing membrane in accordance with Manufacturer's instructions around all openings in exterior gypsum sheathing. Apply flashing membrane primer on all concrete, masonry and glass-matt faced gypsum sheathing surfaces prior to adhering flashing membrane.

G. Place soffit vents at locations indicated in continuous lengths consistent with lines of buildings and as detailed on Drawings. Place adjacent lengths with tight fitting hairline joints.

3.03 CLEANING

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BLANK PAGE

Emc2 Painting and Coatings

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1.1 SECTION INCLUDES

A. Exterior and interior paint and coatings systems including surface preparation.