Exterior Wood-Framed Wall

Exterior: Two layers 5/8” (15.9 mm) DensGlass Fireguard Sheathing applied vertically or horizontally to 2 x 4 wood studs 16” (406 mm) o.c. Base layer attached with 1-7/8” (48 mm) galvanized roofing nails 16” (406 mm) o.c. Face layer attached with 2-3/8” (60 mm) galvanized roofing nails 8” (203 mm) o.c. Stagger joints between layers and on base layer of both sides. Interior: Two layers 5/8” (15.9 mm) DensArmor Plus® Fireguard® or 5/8” (15.9 mm) ToughRock® Fireguard X® applied horizontally or vertically to framing. Base layer attached with 1-7/8” (48 mm) 6d cement coated nails 6” (152 mm) o.c. Face layer attached with 2-3/8” (60 mm) 6d cement coated nails 8” (203 mm) o.c. Stagger joints between layers and on base layer of both sides. Sound tested with studs 16” (406 mm) o.c. and nails for base layer spaced 6” (152 mm) o.c.

Hourly Rating: 2-hour
STC Rating:
Fire Test Reference: UL U301, cUL U301, GA WP8416
Sound Test Reference:
Approved for Assembly:
DensArmor Plus® Fireguard C® Products
DensArmor Plus® Fireguard® Products
DensElement® Barrier Sheathing
DensGlass® Fireguard® Sheathing
DensShield® Fireguard® Tile Backer
ToughRock® Fireguard C® Products
ToughRock® Fireguard X® Mold-Guard® Products
ToughRock® Fireguard X® Products
ToughRock® Lite-Weight Fire-Rated Products