DensGlass Gypsum Sheathing

This DensGlass® 5/8 in. fiberglass-mat gypsum sheathing from Georgia-Pacific is engineered to deliver long-term durability and reliable performance in both fire-rated and non-fire-rated wall systems. The fiberglass mat facing provides enhanced moisture and mold resistance compared to traditional paper-faced sheathing, making it a dependable choice for exterior applications.

Designed for use behind brick, siding, stucco, and a wide range of cladding systems, it offers a rigid, stable substrate for most air- and water-resistive barrier solutions. Its proven 30-year track record and ease of installation (simple score-and-snap) make it suitable for new builds, renovations, ceilings, and soffits across various climate zones.

Dimensions: 4 ft x 8 ft x 5/8 in.

Key Features

• Over 30 years of trusted performance in the field

• Suitable for exterior walls, ceilings, and soffits in many applications

• Performs well in both warm and cold climate zones

• Adds strength and durability to fire-rated and non-fire-rated assemblies

• Fiberglass mat-faced for superior mold and moisture resistance

• Provides a stable base for most air or water-resistive barrier systems

• Ideal behind permanent claddings such as siding, brick, and stucco

• Significantly more moisture- and mold-resistant than paper-faced gypsum

• Quick and easy installation—simply score and snap

Specifications