Gypsum Sheathing

Combining a treated gypsum core with a water-repellent face paper, gypsum sheathing improves structural strength while enhancing weather and fire resistance at an affordable installed cost. It is suitable for installation under many types of exterior surfaces including masonry veneer and all types of siding.


  • Water-resistant core and paper
  • Low material and application cost
  • May be installed over wood or metal framing
  • Available in 1⁄2" thickness with regular water-resistant core and 5⁄8" thickness with a fire- and water-resistant core
  • Fire resistance classified by Underwriters Laboratories according to ASTM E119
  • Available with a minimum of 93% certified recycled content on a dry-weight basis in accordance with ISO 14021 standards


  • Should not be used as a nailing base
  • Application to framing by adhesive only is not recommended
  • Not recommended for application to ceilings
  • Not intended for long-term exposure to weather, 30-day maximum
  • Should be stored, handled and installed to comply with industry standards GA253 & ASTM C1280

Low VOC-Emitting Material:

Gypsum board products are third-party certified by Materials Analytical Services, LLC (MAS) to meet the performance standard established for low-emitting materials under the Collaborative for High Performance Schools (CHPS) Program.

Sulfur Emissions Testing:

In emissions level testing for carbon disulfide and carbonyl sulfide conducted by Materials Analytical Services, U.S producted gypsum board was determined to be negative for sulfur off-gassing and is not considered a problematic corrosive drywall type.

Fire Resistance of 5/8" Type X Panels:

This material has been fire tested in accordance with the requirements of ASTM E119 and therefore may provide a fire rating of one or more hours, depending on the system in which it is applied. Because ASTM procedures require that fire tests be conducted on complete building assemblies/systems and not just on the board itself, the ability of any particular 5/8" Type X gypsum board to pass a specific ASTM fire test may well depend on factors other than the fire resistance of the gypsum board being tested. These factors include the other components used to construct the building system being tested, the manner in which the system is constructed and the inherent variability of ASTM fire tests. See our Fire-Resistant Gypsum Board page for more information.


To prevent damaging the finished edges, gypsum wallboards should be carried, never dragged. To protect the Drywall from weather and direct sunlight when storing gypsum boards, store them indoors. Care should be taken to prevent sagging or damage to edges, ends and surfaces and gypsum boards should be stored lying flat and neatly stacked.


IICRC support

Whether you are a Treasure Coast area property manager, commercial general contractor, or home owner, One Call Properties Service will provide quality work, timely service, and reasonable pricing. We pride ourselves on the high standards we have established and maintained as a Treasure Coast area contractor. We will gladly provide references if you are considering us for your next damage restoration project.


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