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Products / Gypsum Board / CGC

Gyplap Sheathing
Last Modified: 2018-02-03

Gyplap Sheathing


  • Exterior application under many finishes
  • Weather-resistant
  • Noncombustible gypsum core adds fire resistance

4' x 8'1/2"Add To Quote
4' x 8'5/8"Add To Quote

Gyplap Sheathing

CGC Gyplap® Brand Treated-Core Gypsum Sheathing is a weather and fire-resistant panel designed to combine excellent performance with exceptional economy.

It is used in wood and light steel frame construction under many exterior finishes, such as masonry veneer, wood, and composite siding. Its non combustible gypsum core adds fire safety not available with plywood or wood-fibre sheathing. CGC Gyplap® Treated Core Gypsum Sheathing has a water-resistant core treatment that is clad in water repellent paper on the face and back surfaces. For use on residential and commercial construction. Available in 12.7mm (1/2") and 15.9mm (5/8").

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