Usg Exterior Gypsum Ceiling Board User Manual (+ PDF)

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1 USG EXTERIOR GYPSUM CEILING BOARD

6 SUBMITTAL APPROVALS

7 PRODUCT INFORMATION

8 Manufactured by

9 USG EXTERIOR GYPSUM CEILING BOARD User Manual

10 Related Posts

USG EXTERIOR GYPSUM CEILING BOARD

For sheltered exterior ceiling areas

Economical
Attractive
Fire-resistant
Sag- and warp-resistant

DESCRIPTION

USG Sheetrock® Brand Exterior Gypsum Ceiling Board is an ideal surface material for sheltered exterior ceiling areas. Weather- and sag-resistant, it embodies a specially treated gypsum core encased in chemically treated water-repellent paper. Commercial uses include large canopies and covered walkways, malls and parking areas. Residential uses include open porches, breezeways, carports and exterior soffits. The board can be applied directly to wood framing or to cross-furring of wood or metal furring channels attached to main supports. With USG Sheetrock® Brand Exterior Gypsum Ceiling Board, the in-place cost is lower than that of exterior grade plywood, laminated fiberboard or portland cement plaster. An independent survey (Building Construction Cost Data, Robert Snow Means Co.) documented large savings on both material and labor when compared to cement plaster soffits. The actual installed cost of USG Sheetrock® Brand Exterior Gypsum Ceiling Board is about one-third that of portland cement plaster.

USG Sheetrock® Brand Exterior Gypsum Ceiling Board offers the speed and economy of regular drywall construction with quick score-and-snap cutting; no sawing or special tools; rapid screw or nail attachment; openings simply made where and when required, during or after application; furring and trim common to conventional construction; and fire-resistant materials. Special eased edges minimize ridging and beading for smooth, sturdy joints and an attractive, easy-to-maintain surface. Chemically hardening USG Sheetrock® Brand Durabond® Setting-Type Joint Compound or USG Sheetrock® Brand Easy Sand™ Lightweight Setting-Type Joint Compound are required for this exterior application. As an alternative, wood battens may be used to cover joints. USG Sheetrock® Brand Exterior Gypsum Ceiling Board meets or exceeds the requirements set forth in the Standard ASTM C1396 for exterior gypsum soffit board. In addition, 5/8″ Firecode® Core and 5/8″ Firecode C Core meet or exceed the Standard ASTM C1396 for Type X gypsum board, and are classified by Underwriters Laboratories Inc. (UL) for use in several 1- and 2-hr. floor-ceiling and roof-ceiling designs. Please refer to the UL Fire Resistance Directory for the proper applications. USG Sheetrock® Brand Exterior Gypsum Ceiling Board accepts primer and paint with uniform suction—no bond failure, blistering, or peeling. Grain-free, splinter-free surfaces stay attractively smooth. USG Sheetrock® Brand Exterior Gypsum Ceiling Board is available in 1/2″ and 5/8″ thicknesses for standard construction uses.

LIMITATIONS

Do not expose directly to weather.
To attain fire-resistance ratings, construction of ceiling assemblies must conform to design details as specified by the testing agency.
Maximum spacing of framing members is 24″ o.c.
Not recommended for exterior soffits and ceilings which project upwards and away from the building proper.

INSTALLATION

Warning: Store all USG Sheetrock® Brand gypsum panels fl at. Panels are heavy and can fall over, causing serious injury or death. Do not move unless authorized.

WOOD FRAMING

1″ x 4″ wood furring may be used in non-fire-rated construction for screw application where support member spacing is 24″ o.c. maximum. Furring of 2″ nominal thickness should be used in non-fire-rated construction for nail application of board or where framing spacing is from 24″ to 48″ o.c. maximum.

STEEL FRAMING

Installation of grillage should be the same as for single-layer drywall application (see USG Drywall Suspension System brochure (AC3152) or contact Steel Stud Manufacturers Association for application information).

WEATHER PROTECTION

At the perimeter and vertical penetrations, the exposed core of panels must be covered with a J-stop trim or securely fastened moldings. In areas subject to freezing temperatures and other severe weather conditions, shingled roofs should be installed in accordance with good roofing practices. Fascia boards should extend at least 1/4″ below the ceiling board or adjacent trim moldings, whichever is lower, to provide a drip edge.

INTERSECTIONS

Where ceiling board expanse exceeds 4 ft., a space of at least 1/4″ should be provided between edge of ceiling board and adjacent walls, beams, columns and fascia. This space may be screened or covered with molding, but should not be caulked.

CONTROL JOINTS

USG Sheetrock® Brand Exterior Gypsum Ceiling Board, like other building materials, is subject to structural movement, expansion, and contraction due to changes in temperature and humidity. Install a 093 Zinc Control Joint or a control joint consisting of two pieces of J-stop trim back-to-back in ceiling board where expansion or control joints occur in the exterior wall or roof. Where aluminum H-moldings are used, they will serve as control joints, provided the board is not tightly inserted.

JOINT TREATMENT

USG Sheetrock® Brand Durabond Setting-Type Joint Compounds and USG Sheetrock® Brand Easy Sand Lightweight Setting-Type Joint Compounds are hardening-type products developed to provide faster finishing of drywall, even under slow drying conditions. Rapid chemical hardening and low shrinkage permit same-day finishing and usually next-day decoration. Features exceptional bond; virtually unaffected by humidity extremes.

PRODUCT DATA

Width: 4 ft.
Lengths: 8 and 12 ft.
Thicknesses: 1/2″ regular, 5/8″ Firecode Core, 5/8″ Firecode C Core.
Edges: Eased or tapered.
Weights: 1/2″ regular, 1.6 lbs./sq. ft. (7.8 kg/m2); 5/8″ Firecode Core, 2.4 lbs./sq. ft. (11.7 kg/m2), 5/8″ Firecode C Core, 2.5 lbs./sq. ft. (12.2 kg/m2).
Compliance with Standards: ASTM C931 and C1396.
Thermal Coefficient of Expansion (Unrestrained): 9.0 x 10–6 in./in. /°F (40-100°F); 16.2 x 10–6 mm/mm/°C (4.5-37.8°C).
Hygrometric Coefficient of Expansion (Unrestrained): 7.2 x 10–6 in./in./% r.h. (5-90% r.h.); (7.2 x 10–6 mm/mm/% r.h.) (7.2 μm/m x % r.h.).
Surface Burning Characteristics: Flame spread 20; smoke developed 0.
Packaging: Two panels per bundle.

Note: Check with local USG sales representative for availability. Some products and sizes available via special order.

SUBMITTAL APPROVALS

Job Name
Contractor	Date

PRODUCT INFORMATION

See usg.com for the most up-to-date product information.

WARNING

Dust may cause irritation to eyes, skin, nose, throat and upper respiratory tract. Avoid irritation by reducing exposure to dust. Use in a well-ventilated area or provide sufficient local ventilation. If dusty, wear a NIOSH/MSHAapproved dust respirator. Wear eye protection. If eye contact occurs, flush thoroughly with water for 15 minutes. If irritation persists, call a physician. Wash with soap and water after use. Do not ingest. If ingested, call a physician. If cutting the board with a power tool, use a wet or vacuum saw to reduce the amount of dust generated. Panels are heavy and can fall over, causing serious injury or death. Avoid creating a tripping hazard and do not exceed floor limit loads.

Product safety information: 800 507-8899 or usg.com. KEEP OUT OF REACH OF CHILDREN.

TRADEMARKS

The trademarks USG, DURABOND, EASY SAND, FIRE CODE, SHEETROCK, IT’S YOUR WORLD. BUILD IT., the USG logo, the design elements and colors, and related marks are trademarks of USG Corporation or its affiliates.

NOTE

Products described here may not be available in all geographic markets. Consult your USG Company sales office or representative for information.

NOTICE

We shall not be liable for incidental and consequential damages, directly or indirectly sustained, nor for any loss caused by the application of these goods not in accordance with current printed instructions or for other than the intended use. Our liability is expressly limited to the replacement of defective goods. Any claim shall be deemed waived unless made in writing to us within thirty (30) days from date it was or reasonably should have been discovered.

SAFETY FIRST!

Follow good safety and industrial hygiene practices during handling and installing all products and systems. Take necessary precautions and wear the appropriate personal protective equipment as needed. Read material safety data sheets and related literature on products before specification and/or installation.