Wall Elevation View

8'-0" Wall Height
H-Stud H-Stud H-Stud C-Track C-Track DensGlass® Shaftliner DensGlass® Shaftliner DAMAGED Missing Core Setting-Type Joint Compound OVERLAY PANEL 1" Shaftliner or 5/8" Fireguard Type S to H-Stud Type G to Shaftliner 8'-0" 24" O.C. 24" O.C. ≈26" (H-Stud to H-Stud) 4" min 4" min 8" O.C. 1"

Overlay Panel — Back Face (Plan View)

Adhesive Application
BACK OF OVERLAY PANEL Full Coverage ¼" Notched Trowel Pattern H-Stud H-Stud

Repair Procedure

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Step 1: Assess & Prepare Damaged Area

Remove all loose pieces of gypsum core from the damaged area. Clean out debris thoroughly to ensure a sound substrate for the repair compound.

Checklist: Remove all loose gypsum · Clean debris from void · Inspect surrounding panel

Step 2: Fill Void with Joint Compound

Liberally fill the void completely with a stiff mix of setting-type joint compound. Use minimum water to achieve a workable, plastic consistency.

Specification: Setting-type compound · Stiff/plastic consistency · Minimum water · Complete void fill

Step 3: Prepare Overlay Panel

Select an approved overlay panel and cut to size. Panel width should span H-stud to H-stud (≈26"). Height should exceed the damaged area by 4" minimum in each direction.

Approved Panels: 1" DensGlass® Shaftliner · 5/8" ToughRock® Fireguard C® · 5/8" ToughRock® Fireguard X® · 5/8" DensGlass® Sheathing

Step 4: Apply Adhesive & Laminate

Apply setting-type joint compound at full coverage along the back of the overlay panel using a ¼" notched trowel. Position and press firmly to laminate to the patched shaftliner.

Application: ¼" Notched trowel · 100% coverage on panel back · Full coverage ridges · Firm, even contact

Step 5: Fasten Overlay Panel

Secure the overlay with Type S screws into H-studs at 8" O.C., 1" from edges. Attach horizontal edges to shaftliner with Type G screws, 8" from each stud.

Fasteners: Type S @ 8" O.C. max, 1" from edges, ≥3/8" into framing · Type G @ 8" from each stud, ≥5/8" penetration (not through panel)

Material Legend

DensGlass®
H-Stud
Joint Compound
Overlay Panel
Type S Screw
Type G Screw