- 5/16 -inch – A specialty product primarily used in the production of manufactured housing and in laminated double thickness for special sound control panels.
- 3/8-inch – A gypsum board principally applied in a double-layer system over wood framing and as a face layer in repair or remodeling.
- ½-inch – Generally used as a single layer wall and ceiling material in residential work and in double-layer systems for greater sound and fire ratings.
- 5/8-inch – Used in quality single-layer and double-layer wall systems. The greater thickness provides additional fire resistance, higher rigidity, and better impact resistance.
- ¾-inch & 1 inch – Used in interior partitions, shaft walls, stairwells, chaseways, area separation firewalls and corridor ceilings. Special edged panels are used in some interior partitions.
Standard size gypsum boards are 48 inches wide and 8, 10, 12 or 14 feet long. The 48 inch width is compatible with standard framing methods in which studs or joists are spaced 16 inches and 24 inches o.c. (Other lengths and widths of gypsum board are available from the manufacturer on special order.)
Common Types of Gypsum Board in Alphabetical Order:
• Abuse-resistant gypsum panels offer greater resistance to surface indentation, abrasion and penetration than standard gypsum panels.
• Eased edge gypsum board, which has a tapered and slightly rounded or beveled factory edge. It may be used as an aid in custom finishing of joints.
• Exterior gypsum soffit board is board designed for use on the undersides of eaves, canopies, carports, and other commercial and residential exterior applications with indirect exposure to the weather. Soffit board is available in 1/2 or 5/8 -inch thicknesses with both regular and Type X core.
• Foil-backed gypsum board has aluminum foil laminated to the back surface of regular gypsum board or other gypsum panel products. Foil-backed panels serve as vapor barriers.
• Gypsum base for veneer plaster serves as a base for thin coats of hard, high strength gypsum veneer plaster.
• Gypsum liner board serves as a liner panel in shaft walls, stairwells, chase ways, area separation fire walls, and corridor ceilings. It has a special fire-resistant core encased in moisture-resistant paper. Liner board is available in ¾ or 1 -inch thicknesses, widths of 24 or 48 inches and with square edges (sometimes eased square edges). Gypsum liner board is also available with fiberglass mat facing that increases its weather and mold resistance.
• Gypsum sheathing is used as a protective fire resistive membrane under exterior wall surfacing materials such as wood siding, masonry veneer, stucco and shingles. It also provides protection against the passage of water and wind and adds structural rigidity to the framing system. The noncombustible core is surfaced with water repellent paper; in addition, it may also have a water resistant core. Available in 2 feet and 4 feet widths, ½ -inch and 5/8 -inch thick. It is also available with Type X core. Gypsum sheathing is also available with a glass mat facing. This product is more weather resistant and mold resistant than paper-faced gypsum sheathing, and it is often used as a substrate for Exterior Insulating Finishing Systems (EIFS).
• Impact-resistant gypsum panels offer greater resistance to the impact of solid objects from high traffic and vandalism than standard gypsum panels.
• Mold-resistant board incorporates various methods of preventing the growth of mold and mildew on the board’s surface.
• Non-paper-faced gypsum board is unfaced or has a facing other than paper.
• Regular gypsum board (gypsum wallboard) is used as a surface layer on walls and ceilings.
• Sag-resistant board is a ceiling panel that offers greater resistance to sagging than regular gypsum products used for ceilings where framing is typically spaced 24 inches o.c.
• Type C or Proprietary Type-X gypsum board is available in ½ -inch and 5/8 -inch thicknesses and is required in some fire rated assemblies. Additional additives give this product improved fire resistive properties.
• Type X gypsum board is available in ½ -inch and 5/8 -inch thicknesses and has an improved fire resistance made possible through the use of special core additives. It is also available with a predecorated finish. Type X gypsum board is used in most fire rated assemblies.
• Water-resistant gypsum board has a water resistant gypsum core and a water repellent paper. It serves as a base for ceramic or plastic wall tile or plastic finish panels in non-wet areas. This product is available with a regular or Type X core and in ½ -inch and 5/8 -inch thicknesses.
Note: Do not use water-resistant gypsum board on ceilings or soffits unless extra framing is installed; do not exceed 12 inches o.c. between framing members. Do not use water-resistant gypsum board as a tile-backing substrate material where the final surface is directly exposed to running water; select one of several specialty products, including glass-mat-faced gypsum board or cement-based board, as a tile-backing substrate for areas directly exposed to running water.
Reference: Mr. Google
