What Happens to Drywall Tape When It Gets Wet?

Drywall tape is paper-backed and designed to reinforce the seams between drywall panels. When it gets wet, the paper absorbs moisture and swells. This swelling creates bubbles and wrinkles in the tape, which you can often see as raised lines under paint or joint compound.

The adhesive that holds the tape to the drywall also weakens when wet. As the water seeps in, the tape loses its grip and starts to peel away from the seam. Even if the surface dries, the tape remains damaged and can't be smoothed back down without removing it.

Leaving wet drywall tape in place can cause bigger problems. The weakened tape won't hold joint compound properly, so the seam is likely to crack again. The moisture can also soak into the drywall core, which may crumble or sag over time.

If mold develops on the damp paper, it can spread to other parts of the wall. Removing the damaged tape and any wet drywall is the only way to get a clean, stable surface for a proper repair. Acting quickly helps prevent further damage.

If the water damage is extensive, such as from a burst pipe or flooding, you may need professional help. The pros can assess how far the moisture has spread and remove all affected materials. They use drying equipment to pull moisture out of walls and framing.

For a small, localized leak, you might handle the repair yourself if you're handy. But if you're unsure about the extent of the damage, or if you see mold, it's wise to contact local water damage pros. They can inspect the area and guide you on the next steps.

If you live in Arlington, keep your shutoff valve location written down to minimize water damage in the future. Acting quickly after a leak can make the repair simpler.