DensGlass® Sheathing Board – International

DensGlass® Sheathing can be used as an external sheathing for steel and timber framing and is backed with a limited warranty against manufacturer’s defect and exposure to normal weather without deteriorating or delaminating for up to 12 months.

  • A1 Reaction to Fire classification in accordance with BS EN 13501-1
  • Non-combustible as described and tested in accordance with ASTM E136 or CAN/ULC S114
  • Resistant to mould – ASTM D3273
  • Dimensionally stable
Moisture Resistance

DensGlass® Sheathing panels are dimensionally stable and highly moisture resistant

Fire Resistance

Classed as non-combustible. Will not add to fire load if there is a fire

Ease of Use

Unlike non-gypsum sheathing DensGlass® Sheathing can be scored, cut and fastened with traditional drywall tools and fasteners


The surface of DensGlass® Sheathing provides a versatile substrate for the application of water resistive barriers (WRB) and air barrier (AB) membranes

Georgia-Pacific’s DensGlass® Sheathing was the first glass fibre mat faced, gypsum based board for use as a sheathing board externally. For over 30 years it has proved it is strong, highly moisture resistant, non-combustible and easy to install.

DensGlass® Sheathing is a high performance fiberglass mat gypsum sheathing board, with over 30 years of use. It’s available worldwide and is the #1 architectecturally specified product of its kind in the US1. DensGlass® Sheathing, with its recognizable Gold colour, has fiberglass mats for superior mould2 and moisture resistance compared to paper-faced sheathings. Strong, highly moisture resistant and with an A1 non combustible reaction to fire classification, DensGlass® Sheathing is the Gold standard.

1 Based upon survey of CMD Group project specifications from 01/Jan/17 – 31/Dec/2017
2 When tested, as manufactured, in accordance with ASTM D3273, DensGlass Sheathing has scored a 10, the highest level of performance for mould resistance under the ASTM D3273 test method.
The score of 10, in the ASTM D3273 test, indicates no mould growth in a 4-week controlled laboratory test. The mould resistance of any building product when used in actual job site conditions may not produce the same results as were achieved in the controlled,  laboratory setting. No material can be considered mould proof. When properly used with good design, handling and construction practices, Dens® Brand gypsum products provide increased mould resistance compared to standard paper-faced wallboard. For additional information, go to


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