Panel Detail View

Surface Damage Area
H-Stud H-Stud DensGlass® Shaftliner 2" 2" OVERLAY PANEL 1" Shaftliner or 5/8" Fireguard 4" min 4" min 8" O.C. Surface Damage Area (Indentation in gypsum core) < 4 sq in Setting-Type Joint Compound Putty Knife Fill damaged area Fiberglass-Mesh Drywall Tape Embed in compound, extend 2" beyond damage Damage area Repair Complete Mesh tape embedded in compound OVERLAY PANEL POSITION (Will cover repaired area + 4" beyond) 4" min 4" min Repaired damage area ≈26" (H-Stud to H-Stud) Overlay Gypsum Panel Laminated with compound, fastened to framing Type S to H-Stud Type G to Shaftliner ≈26" (H-Stud to H-Stud) Damage area

Overlay Panel — Back Face (Plan View)

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

Repair Procedure

Applicable Condition

Surface damage to DensGlass® Shaftliner panel that includes the gypsum core. Indentation less than 4 square inches and no more than 1/16" deep.

Type A: Minor Damage (≤1/16" deep, <4 sq in)

Step 1: Assess Damage

Identify the damaged area. Damage must be less than 4 square inches and no more than 1/16" deep.

Limits: ≤1/16" deep · <4 sq in area
Step 2: Fill with Joint Compound

Apply setting-type joint compound to fill the damaged indentation using a putty knife.

Compound: Setting-type · Stiff/plastic consistency
Step 3: Embed Fiberglass-Mesh Tape

While compound is wet, embed fiberglass-mesh drywall tape. Extend at least 2" beyond damage in all directions.

Tape: Fiberglass-mesh · Extend 2" beyond damage
Step 4: Complete Repair

Allow compound to set. Apply additional coat if needed to fully embed mesh and create smooth surface.

Finish: Mesh fully embedded · Smooth surface · Allow to cure

Type B: Deeper Damage (>1/16" to ½" deep, <4 sq in)

Step 1: Assess Damage

Damage exceeding 1/16" but no more than ½" deep, and less than 4 sq in, requires compound, mesh, AND overlay panel.

Limits: >1/16" to ½" deep · <4 sq in · Requires overlay
Step 2: Fill with Joint Compound

Apply setting-type joint compound to fill the damaged indentation using a putty knife.

Compound: Setting-type · Stiff/plastic consistency
Step 3: Embed Fiberglass-Mesh Tape

While compound is wet, embed fiberglass-mesh tape. Extend at least 2" beyond damage in all directions.

Tape: Fiberglass-mesh · Extend 2" beyond damage
Step 4: Apply Compound to Overlay Panel

Select overlay: 1" DensGlass® Shaftliner, 5/8" ToughRock® Fireguard, or 5/8" DensGlass® Sheathing. Cut to ≈26" wide (H-Stud to H-Stud), extending 4" beyond damage vertically. Apply compound to back with ¼" notched trowel.

Panel: ≈26" wide · 4" beyond damage each direction · Full coverage compound
Step 5: Install & Fasten Overlay Panel

Position overlay extending 4" beyond damage. Fasten to H-studs with Type S screws at 8" OC, 1" from edges. Attach horizontal edges with Type G screws 8" from each stud.

Type S: 8" OC into studs, ≥3/8" penetration · Type G: Horiz. edges, 8" from stud, ≥5/8" penetration (not through)

Material Legend

Fiberglass-Mat Facer
Gypsum Core
Joint Compound
Fiberglass-Mesh Tape
Type S Screw (to H-Stud)
Type G Screw (to Shaftliner)