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	SECTION 09253
	GYPSUM SHEATHING BOARD
	** NOTE TO SPECIFIER ** BPB America Inc.; gypsum, GlasRoc® exterior sheathing. This section is based on the products of BPB America Inc. which is located at: 5301 West Cypress St. Suite 300 Tampa, FL 33607 Tel: (866) 427-2872 Fax: Fax: (813)286-3991 Email: crc@bpb-na.com [ Click Here ] for additional [ Product Data ]. . Since 1915, BPB has steadily broadened its worldwide market to become the recognized leader in the manufacture of gypsum board products. At BPB, we keep pace with new market trends and advances in manufacturing in order to continuously expand our full line of quality gypsum board products, finishing compounds and textures and ceiling systems. GlasRoc® Sheathing is a composite gypsum panel for exterior applications that provides exceptional long term protection to weather exposure. This unique technology combines reinforcing glass mats, fully-embedded glass mats into a water-resistant core positioned beneath a paperless polymer-modified gypsum surface, and a protective acrylic coating on the exterior surface. GlasRoc® Sheathing is compatible with most exterior wall systems and applications including but not limited to EIFS, cavity wall, conventional stucco, exterior cladding, exterior archways and exterior soffits.
	PART 1	GENERAL
	1.1	SECTION INCLUDES
	** NOTE TO SPECIFIER ** Delete items below not required for project.
		A.	Fully-Embedded glass-mat gypsum sheathing board.
		B.	Sheathing joint-and-penetration treatment.
	1.2	RELATED SECTIONS
	** NOTE TO SPECIFIER ** This paragraph references related work by others specified in other sections. Delete any sections below not relevant to this project; add others as required.
		A.	Section 04810 - Cavity Wall Masonry Assemblies.
		B.	Section 05400 - Cold Formed Metal Framing.
		C.	Section 06100 - Rough Carpentry: Wood framing.
		D.	Section 06160 - Sheathing.
		E.	Section 07240 - Exterior Insulation and Finish System.
		F.	Section 07460 - Exterior Siding.
		G.	Section 09111 - Non-Loadbearing Metal Framing.
		H.	Section 09220 - Stucco
		I.	Section 09215 - Veneer Plaster.
	1.3	REFERENCES
	** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
		A.	ASTM B 117 - Practice for Operating Salt Spray (Fog) Testing Apparatus.
		B.	ASTM C 514 - Standard Specification for Nails for the Application of Gypsum Board.
		C.	ASTM C 954 - Specification for Steel Drill Screws for the Application of Gypsum Panel Products or Metal Plaster Bases to Steel Studs from 0.33 inch (0.84 mm) to 0.112 inch (2.84 mm) in Thickness.
		D.	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.
		E.	ASTM C 1177 - Standard Specification for Nails for Glass Mat Gypsum Substrate for Use as Sheathing.
		F.	ASTM C 1280 - Standard Specification for Application of Gypsum Sheathing.
		G.	ASTM E 84 - Test Method for Surface Burning Characteristics of Building Materials.
		H.	ASTM E 119 - Standard Test Methods for Fire Tests of Building Construction and Materials.
		I.	ASTM E 136 - Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 degrees C.
		J.	GA-216 - Application and Finishing of Gypsum Board; Gypsum Association.
		K.	GA-226 - Application of Gypsum Board to Curved Surfaces; Gypsum Association.
		L.	GA-253 - Application of Gypsum Sheathing; Gypsum Association.
		M.	GA-600 - Fire Resistant Design Systems; Gypsum Association.
		N.	UL (FRD) - Fire Resistance Directory; Underwriters Laboratories Inc.; current edition.
		O.	ULC (FRD) - Fire Resistance Directory; Underwriters' Laboratories of Canada; current edition.
	1.4	SUBMITTALS
		A.	Submit under provisions of Section 01300.
		B.	[ Product Data ]: Manufacturer's data sheets on each product to be used, including:
			1.	Preparation instructions and recommendations.
			2.	Storage and handling requirements and recommendations.
			3.	Installation methods.
	1.5	QUALITY ASSURANCE
	** NOTE TO SPECIFIER ** Include the following two paragraphs for specifying assemblies with fire-resistance ratings. Delete if not required.
		A.	Fire-Test-Response Characteristics: Provide materials and construction identical to those assemblies tested for fire resistance in accordance with ASTM E 119 (CAN/ULC-S101) by a testing and inspecting agency acceptable to authorities having jurisdiction.
		B.	Fire-Resistance Ratings: Conform to requirements for fire-resistance ratings indicated by design designations listed in UL's "Fire Resistance Directory" and Products Certified for Canada.
	1.6	DELIVERY, STORAGE, AND HANDLING
		A.	Ship materials with a weathertight cover and in manufacturer's original packages showing manufacturer's name and product brand name.
		B.	Store materials protected against damage from weather, direct sunlight, surface contamination, construction traffic, or other causes. Stack GlasRoc Sheathing flat on leveled supports off the ground, under cover, and fully protected from weather.
			1.	Protect materials to keep them dry.
			2.	Protect gypsum board panels to prevent damage to edges, ends, and surfaces.
	1.7	PROJECT CONDITIONS
		A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
	PART 2	PRODUCTS
	2.1	MANUFACTURERS
		A.	Acceptable Manufacturer: BPB; 5301 West Cypress St., Suite 300, Tampa, FL 33607. ASD. Tel: (866)427-2872. Fax: (813) 286-3991. Email: crc@bpb-na.com. Website: www.bpb-na.com.
		B.	Single Source Responsibility: Obtain gypsum board products, joint treatment products, and textured coatings from a single manufacturer.
	** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
		C.	Substitutions: Not permitted.
		D.	Requests for substitutions will be considered in accordance with provisions of Section 01600.
	2.2	GYPSUM SHEATHING
	** NOTE TO SPECIFIER ** Edit as required for Canadian Standards.
		A.	GlasRoc® Sheathing: Conforming to the requirements of ASTM C 1177 and the following:
			1.	Flame spread: ASTM E 84 (CAN/ULC-S102): 0 maximum.
			2.	Smoke developed: ASTM E 84 (CAN/ULC-S102): 0 maximum.
		B.	GlasRoc® Sheathing Type X: Conforming to the requirements of ASTM C 1177, and the following:
			1.	Flame spread: ASTM E 84 (CAN/ULC-S102): 0 maximum.
			2.	Smoke developed: ASTM E 84 (CAN/ULC-S102): 0 maximum.
			3.	Noncombustable: ASTM E 136.
	** NOTE TO SPECIFIER ** Show thickness on the Drawings as required to meet the fire resistance rating required. Edit the following paragraphs to reflect the requirements on the Drawings.
		C.	Thickness:
			1.	5/8 inch (15.9 mm) thick where GlasRoc® Sheathing Type X indicated.
			2.	1/2 inch (12.7 mm) thick where GlasRoc® Sheathing indicated.
		D.	Width: 48 inches (1219 mm).
		E.	Length: 96 inches (2438 mm) and 108 inches (2743 mm) standard. Custom lengths available.
		F.	Edges: Square.
	** NOTE TO SPECIFIER ** Depending on the exterior finishing system specified, a joint treatment may not be required. Consult your exterior finishing system manufacturer or local building code authority to determine the appropriate joint treatment. Delete the following two paragraphs if not required.
	2.3	SHEATHING JOINT-AND-PENETRATION TREATMENT MATERIALS
		A.	Glass-Fiber Mesh Sheathing Tape: Self-adhering glass-fiber tape, minimum 2 inches (50 mm) wide, 10 by 10 or 10 by 20 threads/inch (390 by 390 or 390 by 780 threads/m), of type recommended by sheathing and tape manufacturers for use with silicone emulsion sealant in sealing joints in glass-mat gypsum sheathing board.
		B.	Silicone Sealant: Meeting ASTM C 920, Type S, Grade NS, compatible with sheathing tape and sheathing, recommended by tape and sheathing manufacturers for use with glass-fiber mesh sheathing tape and for covering exposed fasteners.
	2.4	ACCESSORIES
	** NOTE TO SPECIFIER ** Edit the following paragraph to reflect the project requirements. Delete the fastener types not required.
		A.	Fasteners: Steel drill screws, in lengths recommended by sheathing manufacturer for thickness of sheathing board to be attached and as follows:
			1.	For steel framing less than 0.0329 inch (0.835 mm) thick, attach sheathing with steel drill screws complying with ASTM C 1002.
			2.	For steel framing from 0.033 to 0.112 inch (0.84 to 2.84 mm) thick, attach sheathing with drill screws complying with ASTM C 954.
			3.	For wood framing, attach with nails or screws of type and spacing as recommended by sheathing manufacturer.
			4.	Provide all fasteners with an organic-polymer or other corrosion-protective coating.
			5.	For soffit applications with Direct-Applied Exterior Finish Systems (DEFS) and setting compound skim coats, provide fasteners with an organic-polymer or other corrosion-protective coating having a salt spray resistance of more than 800 hours per ASTM B 117.
	PART 3	EXECUTION
	3.1	EXAMINATION
		A.	Do not begin installation until substrates have been properly prepared.
		B.	If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
	3.2	PREPARATION
		A.	Clean surfaces thoroughly prior to installation.
		B.	Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
	3.3	INSTALLATION
		A.	Install GlasRoc® Sheathing in accordance GA-253, ASTM C 1280 and manufacturer's written instructions.
		B.	Install fire rated GlasRoc® Sheathing Type X in accordance with UL design or GA-600.
		C.	Use sheathing in longest lengths available to reduce number of joints.
		D.	Cut boards at penetrations, edges, and other obstructions of work; fit tightly against abutting construction, unless otherwise indicated.
			1.	Install boards with a 3/8 inch (9 mm) setback where non-load-bearing construction abuts structural elements.
			2.	Install boards with a 1/4 inch (6 mm) setback where they abut masonry or similar materials that might retain moisture, to prevent wicking.
			3.	Allow no joints greater than 1/8 inch (3 mm).
		E.	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.
		F.	Apply fasteners so screw heads bear tightly against face of sheathing boards but do not break embedded glass mat.
		G.	Do not bridge building expansion joints with sheathing; cut and space edges to match spacing of structural support elements.
		H.	Horizontal Installation: Install sheathing 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. Screw-attach boards at perimeter and within field of board to each steel stud.
			1.	Space fasteners approximately 8 inches (200 mm) o.c. (or tighter spacing if recommended by manufacturer for specific application) and set back a minimum of 3/8 inch (9 mm) from edges and ends of boards.
	** NOTE TO SPECIFIER ** Edit the following paragraph to reflect the project requirements. Verify radius limitations and framing requirements with the manufacturer's recommendations. Delete if not required.
		I.	Exterior Concave and Convex Surfaces: Install sheathing for curved exterior surfaces in accordance with GA-226. Starting at one end against a temporary stop, fasten to framing members one at a time with fasteners spaced a minimum of 8 inches (200 mm) o.c. (or tighter spacing if recommended by manufacturer for specific application) and set back a minimum of 3/8 inch (9 mm) from edges and ends of boards. Note that frame spacing may need to be adjusted to meet curvature requirements.
		J.	Seal sheathing joints according to sheathing manufacturer's written recommendations.
			1.	Short Term (6 month exposure) - Apply elastomeric sealant on joints and trowel flat. Apply sufficient quantity of sealant to completely cover joints after troweling. Seal other penetrations and openings.
			2.	Long Term (as an alternate to separate weather-resistive barrier) - Apply glass-fiber mesh sheathing tape to fiberglass reinforced gypsum sheathing board joints, and apply and trowel silicone emulsion sealant to embed sealant in entire face of tape. Apply sealant to exposed fasteners with a trowel so fasteners are completely covered. Seal other penetrations and openings.
		K.	Finishing of Exterior Ceilings and Soffit installations according to sheathing manufacturer's written recommendations.
	3.4	PROTECTION
		A.	Protect work from damage and deterioration until application of exposed finish material.
	END OF SECTION