Drywall tape peeling or bubbling

Why drywall tape lets go

Drywall seams are covered with paper tape pressed into a layer of joint compound, then finished with wider, thinner coats. The bond depends on the compound under the tape. If too much was squeezed out, or the compound dried too fast, the tape sits on the wall with little holding it, and air pockets show up later as bubbles or long blisters.

Moisture loosens tape too, which is why peeling seams show up on bathroom ceilings and near roof or plumbing leaks. A crack along the joint between a ceiling and an interior wall that opens in winter and closes in summer is usually seasonal framing movement, not bad tape, and needs a different approach than re-taping.

Common causes of peeling tape

Let's fix it

1. Check for moisture firstLook for water stains, soft or crumbly drywall, or a musty smell around the bad seam. If it's on a ceiling under a bathroom or roof, or anywhere with a stain, find and stop the leak first; there's a separate guide for a water stain on the ceiling. In a bathroom, make sure the exhaust fan clears the steam. Re-taping over damp drywall will fail again.
   Done

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2. Cut out the loose tapeWith a sharp utility knife, slice along both edges of the loose or bubbled tape and across the ends where it's still firmly stuck. Peel the loose section away. Scrape off crumbly compound and lightly sand the edges smooth. If the drywall's paper face tore, coat that spot with a stain-blocking primer and let it dry, so the new compound doesn't bubble the torn paper.
   Done

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3. Bed new tape in compoundSpread an even layer of joint compound over the seam with a 6-inch knife, a little wider than the tape. Press a length of paper tape into it, centered on the seam. Then pull the knife along the tape firmly, from the middle out, so a little compound squeezes out the sides and no air is left underneath. Skim a very thin layer over the top and let it dry completely.
   Done

   Something went wrong?

   • A bubble shows up in the new tape Cut it out while the compound is wet and press a new piece in with more compound underneath.

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4. Apply two thin finish coatsOnce the first coat is dry, spread a thin coat with a wider 10-inch knife, feathering it a few inches past the edges of the tape. Let it dry, then apply a second, slightly wider coat. Thin coats dry faster and need less sanding than one thick one. Premixed compound usually needs overnight to dry; setting compound sets in the time printed on the bag.
   Done

   Something went wrong?

   • The coat cracks as it dries It went on too thick. Sand it down and apply a thinner coat.

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5. Sand, prime and paintSand the patch lightly with a sanding sponge until it blends into the wall, without sanding into the tape. Wipe off the dust. Prime the patch, since bare compound absorbs paint differently and will show through, then paint; we have a guide for touching up wall paint for blending tips.
   Done

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Watch it done

How To Fix Drywall Tape BubblesBy HouseImprovements on YouTube. Their method may vary a little from ours.

Watch on YouTube

If it's a crack or a stain

If you see a crack in the wall rather than loose tape, see the guide for fixing a drywall crack.

If there's a water stain around it, check our guide for a water stain on the ceiling.

Peeling drywall tape questions