Repair lifted drywall tape
Remove a loose section, re-bed paper tape and blend the finish.
Home · 2–3 hr + drying · Medium
Before you start
Stop for dampness, mold or continuing joint movement. Resolve lead or asbestos concerns before disturbing old paint or compound. Use containment, eye protection and dust control; do not cut into hidden services.
Tools and materials
- Paper joint tape, compatible taping or all-purpose joint compound, primer and paint
- Utility knife, narrow and wide drywall knives, mud pan, fine sanding sponge, drop cloth and suitable dust protection
Check the problem
Check for a failed tape bond
Look for a raised strip or hollow blister following a joint. Press gently; loose tape differs from a small surface dent.
Rule out an active cause
Inspect for stains, dampness and moving panels. A recurring crack or loose board needs its underlying cause fixed first.
Steps
Protect the work area
Move furnishings, contain dust and confirm the coating is safe to disturb. Keep the repair localized.
Remove unbonded tape
Use shallow cuts across the ends of the loose section, then peel and scrape only to firmly bonded material. Do not gouge the gypsum core.
Prepare the recess
Remove loose compound and dust. Treat exposed damaged face paper with a compatible sealer if required. Fill deep voids and let that material harden first.
Embed fresh paper tape
Spread a continuous compound bed, center the new tape over the joint and draw the knife along it to press out air. Leave compound beneath the tape; do not squeeze it dry.
Build thin feathered coats
Let each layer dry fully. Apply wider thin coats until the tape and edges blend into the wall, scraping ridges between coats.
Finish and inspect
Lightly smooth the dry repair without exposing tape. Remove dust, prime and paint. Check under side light for ridges or new bubbles; redo a loose section rather than covering it.
Lightly smooth the dry repair without exposing tape. Remove dust, prime and paint. Check under side light for ridges or new bubbles; redo a loose section rather than covering it.
Tips
More topping cannot fix loose tape
Remove the unbonded area and restore the bond beneath it.
Thin coats save work
Heavy compound shrinks and takes longer to dry.
Sand only what needs it
A clean knife pass while coating reduces later sanding.