SHEETROCK? Brand Gypsum Sheathing Architectural Spec - 06160

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SHEETROCK? Brand Gypsum Sheathing Architectural Spec - 06160SHEE

General Specification Notes: References in blue are general indicators to the specifier.

    References in red relate to fire-rated assemblies and/or code related

    issues, if not applicable, delete.


     SpecificationSHEETROCK Brand Gypsum Sheathing


    1.01 SUMMARY

    A. This Section includes the following:

    1. Wall Sheathing.

    2. Weather-Resistant Sheathing Barriers.

    3. Sheathing Joint and Penetration Treatment.

    B. Related Sections include the following:

    1. Section 01352 LEED Requirements.

    2. Section 05400 Cold-Formed Metal Framing.

    3. Section 06100 Rough Carpentry.


    A. American Society for Testing and Materials:

    1. ASTM C 79: Standard Specification for Treated Core and Nontreated Core

    Gypsum Sheathing Board.

    2. ASTM C 954: Specification for Steel Drill Screws for the Application of Gypsum

    Panel Products or Metal Plaster Bases to Steel Studs from 0.033 inch to 0.110

    inch in Thickness.

    3. ASTM C 1002: Standard Specification for Steel Self-Piercing Tapping Screws

    for the Application of Gypsum Panel Products or Metal Plaster Bases to Wood

    Studs or Steel Studs.

    4. ASTM C 1280: Standard Specification for Application of Gypsum Sheathing.

    5. ASTM C 1396: Standard Specification for Gypsum Board.

    6. ASTM D 226: Standard Specification for Asphalt-Saturated Organic Felt Used

    in Roofing and Waterproofing.

    7. ASTM E 84: Standard Test Method for Surface Burning Characteristics of

    Building Materials.

    8. ASTM E 119: Test Method for Fire Tests of Building Construction and Materials.


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    9. ASTM E 1677: Standard Specification for an Air Retarder (AR) Material or

    System for Low-Rise Framed Building Walls.

    B. Gypsum Association:

    1. GA 253: Recommended Specification for the Application of Gypsum Sheathing. 1.03 SUBMITTALS

    A. General: Submit in accordance with Section 01330

    B. Product Data: Submit manufacturer’s current technical literature for product specified.


    A. Fire Resistance Rated Assembly Characteristics: Provide materials and construction

    identical to those tested in accordance to ASTM E 119 by an independent testing and

    inspection agency acceptable to authorities having jurisdiction.

    1. Fire Resistance Ratings: Indicated by design designations from UL “Fire

    Resistance Directory.


    A. All materials shall be delivered in their original unopened packages and stored in an

    enclosed shelter providing protection from damage and exposure to the elements.

    WARNING: Store all SHEETROCK Brand Gypsum Sheathing flat. Panels are heavy

    and can fall over, causing serious injury or death. Do not move unless authorized. PART 2 - PRODUCTS


    A. Paper-Surfaced Gypsum Sheathing: ASTM C 79 or ASTM C 1396, gypsum

    sheathing; with water-resistant-treated core and with water-repellent paper bonded to

    core's face, back, and long edges.

    1. Product: Subject to compliance with requirements, provide SHEETROCK Brand

    Gypsum Sheathing by United States Gypsum Company.

    2. Type and Thickness: [Regular, 1/2 inch] [Type X, 5/8 inch] thick.

    3. Edge and End Configuration: [V-shaped, tongue-and-groove long edges;

    square ends] [Square].


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    4. Size: [24 by 96 inches for horizontal] [48 by 96 inches for vertical] [48 by 108

    for vertical] installation.

    2.02 FASTENERS

    A. General: Provide fasteners of size and type indicated that comply with requirements

    specified in this Article for material and manufacture.

    B. Nails: 11-gauge hot-dipped galvanized roofing nails [1-1/2 inch] [1-3/4 inch], 7/16

    inch diameter head.

    C. Wood Screws: DUROCK Brand Wood or USG Sheathing WF screws [1-1/4 inch] [1-

    5/8 inch] [2-1/4 inch] with corrosion-resistant coating.

    D. Screws for Fastening Gypsum Sheathing to Cold-Formed Metal Framing: DUROCK

    Brand Steel or USG Sheathing SF steel drill screws [1-1/4 inch] [1-5/8 inch] [2-1/4

    inch] with corrosion-resistant coating.

    1. For steel framing less than 0.0329 inch thick, attach sheathing to comply with

    ASTM C 1002.

    2. For steel framing from 0.033 to 0.112 inch thick, attach sheathing to comply with

    ASTM C 954.


    A. Building Paper: ASTM D 226, Type 1 (No. 15 asphalt-saturated organic felt),


    B. Building Wrap: ASTM E 1677, Type I air retarder, with flame-spread and smoke-

    developed indexes of less that 25 and 450, respectively, when tested according to

    ASTM E 84, UV stabilized and acceptable to authorities having jurisdiction.

    1. Products: Subject to compliance with requirements, provide Tyvek StuccoWrap

    by DuPont (E. I. du Pont de Nemours and Company).

    C. Building-Wrap Tape: Pressure-sensitive plastic tape recommended by building-wrap

    manufacturer for sealing joints and penetrations in building wrap. 2.04 SHEATHING JOINT AND PENETRATION TREATMENT MATERIALS

    A. Sealant for Paper-Surfaced Gypsum Sheathing Board: Elastomeric, medium-modulus,

    neutral-curing silicone joint sealant compatible with joint substrates formed by gypsum

    sheathing and other materials, recommended by sheathing manufacturer for

    application indicated, and complying with requirements for elastomeric sealants

    specified in Section 07920 Joint Sealants.


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    A. Flexible Flashing: Composite, self-adhesive, flashing product consisting of a pliable,

    rubberized-asphalt compound, bonded to a high-density, cross-laminated

    polyethylene film.

    B. Primer for Flexible Flashing: Product recommended by manufacturer of flexible

    flashing for substrate.



    A. Do not use materials with defects that impair quality of sheathing or pieces that are

    too small to use with minimum number of joints or optimum joint arrangement. B. Cut panels at penetrations, edges, and other obstructions of work; fit tightly against

    abutting construction, unless otherwise indicated.

    C. Coordinate wall sheathing installation with flashing and joint-sealant installation so

    these materials are installed in sequence and manner that prevent exterior moisture

    from passing through completed assembly.

    D. Do not bridge building expansion joints; cut and space edges of panels to match

    spacing of structural support elements.


    A. Comply with ASTM C 1280, GA-253 and manufacturer's written instructions.

    1. Fasten sheathing to wood framing with [nails] [screws].

    2. Fasten sheathing to cold-formed metal framing with screws.

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

    structural elements.

    4. Install boards with a 1/4-inch gap where they abut masonry or similar materials

    that might retain moisture, to prevent wicking.

    B. Apply fasteners so heads bear tightly against face of sheathing boards but do not cut

    into facing.

    C. Horizontal Installation: Install sheathing with V-grooved edge down and tongue edge

    up. Interlock tongue with groove to bring long edges in contact with edges of adjacent

    boards without forcing. Abut ends of boards over centers of studs, and stagger end

    joints of adjacent boards not less than one stud spacing. Attach boards at perimeter

    and within field of board to each steel stud.


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    1. Space fasteners approximately 8 inches o.c. and set back a minimum of 3/8

    inch from edges and ends of boards.

    2. For sheathing under stucco cladding, boards may be initially tacked in place

    with screws if overlying self-furring metal lath is screw-attached through

    sheathing to studs immediately after sheathing is installed.

    D. Vertical Installation: Install board vertical edges centered over studs. Abut ends and

    edges of each board with those of adjacent boards. Attach boards at perimeter and

    within field of board to each stud.

    1. Space fasteners approximately 8 inches o.c. and set back a minimum of 3/8

    inch from edges and ends of boards.

    2. For sheathing under stucco cladding, boards may be initially tacked in place

    with screws if overlying self-furring metal lath is screw-attached through

    sheathing to studs immediately after sheathing is installed.


    A. General: Cover sheathing with weather-resistant sheathing paper as follows:

    1. Cut back barrier 1/2 inch on each side of the break in supporting members at

    expansion- or control-joint locations.

    2. Apply barrier to cover vertical flashing with a minimum 4-inch overlap, unless

    otherwise indicated.

    B. Building Paper: Apply horizontally with a 2-inch overlap and a 6-inch end lap; fasten

    to sheathing with galvanized staples or roofing nails.

    C. Building Wrap: Comply with manufacturer's written instructions.

    1. Seal seams, edges, fasteners, and penetrations with tape.

    2. Extend into jambs of openings and seal corners with tape.


    A. Apply elastomeric sealant to joints and fasteners. Seal all penetrations and openings. 3.06 FLEXIBLE FLASHING INSTALLATION

    A. Apply flexible flashing where indicated to comply with manufacturers written


    1. Prime substrates as recommended by flashing manufacturer.

    2. Lap seams and junctures with other materials at least 4 inches, except that at

    flashing flanges of other construction, laps need not exceed flange width.


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    3. Lap flashing over weather-resistant building paper at bottom and sides of


    4. Lap weather-resistant building paper over flashing at heads of openings.

    5. After flashing has been applied, roll surfaces with a hard rubber or metal roller

    to ensure that flashing is completely adhered to substrates.


    A. Paper-Surfaced Gypsum Sheathing: When applied to a structure, sheathing must not

    be left exposed to the elements for more that one month unless all gaps resulting

    from cuts, corners, joints and machine-end cuts of the sheathing are filled with a

    elastomeric sealant at the time of erection to protect the sheathing from water

    intrusion. This treatment will extend exposure time to six months. Protect sheathing

    by covering exposed exterior surface of sheathing with weather-resistant sheathing

    barrier securely fastened to framing. Apply covering immediately after sheathing is


    END OF SECTION 06160


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