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National Gypsum
Gypsum Sheathing

Gypsum Sheathing

Product catalog summary

Description: Gold Bond® Brand Gypsum Sheathing is a water-resistant board used as an underlayment for exterior wall framing. It features a treated core and water-repellent paper surfaces. The Fire-Shield (type X) variant includes additives for enhanced fire resistance.

Uses: Suitable for wood and steel stud construction, providing fire resistance, weather protection, and structural strength. Ideal for fire-rated exterior wall assemblies.

Advantages: Economical, fire-resistant, weather-protective, easy to size, and vapor permeable, allowing water vapor escape.

Specifications: Available in 1/2" and 5/8" thicknesses with square edges. Complies with ASTM C 1396. Fire ratings include one-hour and two-hour ratings for specific wall assemblies.

Installation: Fasteners should be tightly secured without cutting into the sheathing. Can be applied vertically or horizontally with specific fastener spacing. Should be covered if exposed for more than 30 days.

Limitations: Not a finished surface or nailing base. Not recommended for exterior ceilings, soffits, or sills. Should not be exposed to elements for more than 30 days without protection.

e2XP™ Extended Exposure Sheathing: Offers enhanced moisture and mold resistance, suitable for up to 12 months of weather exposure. Noncombustible and dimensionally stable, ideal for soffit and radius applications. Not intended for direct application of finishes or as a nailing base.

Recommendations: Follow manufacturer’s guidelines for installation and use. Ensure proper flashing and sealing of openings to maintain warranty validity.

Product Overview: e2XP Fire-Shield® Exterior Sheathing is a coated fiberglass mat designed for superior weather resistance and enhanced fire-resistive properties. Asbestos-free and available in various sizes and thicknesses.

Sizes and Types: Width: 4' (1219 mm), Lengths: 8', 9', and 10' (2438 mm, 2743 mm, and 3048 mm), Thickness: 1/2" Regular (12.7 mm), 5/8" Fire-Shield (15.9 mm), Edges: Square.

Technical Data: Nominal Width: 4', Standard Lengths: 8', 9', 10' ± 1/4", Nominal Weight: 1,900 lbs./msf, Bending Radius: 6'1", Composition: Coated fiberglass mat/gypsum core, Racking Strength: >540 lbs/f. (dry) for 1/2", >654 lbs/f. (dry) for 5/8", Flexural Strength: 804 lbs. for 1/2", 1004 lbs. for 5/8", Compressive Strength: Min. 500 psi, Humidified Deflection: 1/8", Permeance: 22 perms for 1/2", 19 perms for 5/8", "R" Value: .043 for 1/2", .050 for 5/8", Combustibility: Noncombustible, Flame Spread: 5, Coefficient of Thermal Expansion: 9.26 x 10-6 in/in/˚F, Resists Growth of Mold: Yes, Handling Characteristic: Yes, Fasteners: Standard.

Joint Treatment: Compatible with various exterior systems. Joint finishes must be compatible with the specified exterior system. For soffit and ceiling applications, embed 2" wide fiberglass mesh tape in ProForm® BRAND Sta-Smooth® Setting Compound or equivalent over all joints, apply a skim coat, prime with exterior grade primer, and finish with two coats of exterior grade paint.

Applicable Standards and References: ASTM C 1280, GYPSUM Association GA-253. Installation must follow Gypsum Association document GA-253, ASTM C 1280, or National Gypsum Co. Gypsum Construction Guide.

Fire Resistance Ratings: The 5/8" e2XP Fire-Shield Sheathing is tested in accordance with ASTM Standard E 119 and classified as Type X for use in UL Listings.

Installation Recommendations: Framing members should not vary more than 1/8" from the plane of adjacent framing. Fasteners should be flush with the panel surface and into the framing, located at least 3/8" from the ends and edges. Use appropriate fasteners for wood and steel framing. Install with end joints staggered on horizontal applications. Control joint locations should follow building design or exterior material specifications.

Decoration: e2XP™ Sheathing was introduced in March 2008 in the Southeastern United States. For more information, visit: www.purplechoice.info.

Catalog excerpts

12 TH EDITION 06 16 43/NGC Gold Bond > BRAND Gypsum Sheathing & Extended Exposure Sheathing >

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USES 1. As a sheathing for woodframed residential construction to provide fire resistance, weather protection and to add to structural strength when used under exterior finishes such as vinyl siding, clapboard, paneling, masonry veneer, stucco and shingles.2. As a sheathing for steel studcommercial construction > Gold Bond Brand GypsumSheathing is a water resistant board product designed for attachment to the outside of exterior wall framing as a water resistant underlayment for various exterior siding materials. The sheathing is manufactured with a treated water resistant core faced with water...

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3.4 LB. SELF-FURRING DIAMOND MESH METAL LATH STUCCO BUILDING FELTOREQUIVALENT BUILDING FELT OR EQUIVALENT OR PAPER- BACKED METAL LATH SHEATHING2" X 4" FRAMING16" O.C.SHEATHING FLASHING SHEATHINGSHEATHING 2" X 4" FRAMING16" O.C. STUCCO VINYL, WOOD, CLAPBOARD SIDING Nail 3.4 lb. Self-furring Galvanized Diamond Mesh metal laththrough the sheathing into the framing. Apply horizontal siding directly over the sheathing. Fastenersshould have a 1" penetration into each framing member. Butt siding joints over framing members. > BUILDINGFELT OREQUIVALENT BUILDINGFELT OREQUIVALENT 2" X 4" FRAMING16" O.C....

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