How to Fix Wet Drywall

Wet drywall can be very hazardous to your health. Several types of mold will begin to grow and expand as long as the drywall remains wet. Fixing wet drywall requires removing moisture from the area. All existing mold and contaminated debris also will have to be removed. The area will need to be disinfected, sanitized, cleaned and deodorized before the repair can be completed.

Things You'll Need

  • Utility knife
  • Drywall saw
  • Hammer
  • Face mask respirator
  • Disinfectant
  • Drywall
  • Drywall screws
  • Screwdriver or drill
  • Drywall joint tape
  • Joint knife spreader
  • Drywall joint compound (mud)
  • Fine grit sandpaper

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Determine the source of the moisture that is contaminating the drywall. Eliminate the possibility of moisture returning to the area.

Cut a line with the utility knife around the wet area. Extend the line 2 feet past the wet drywall. Do not try to cut all the way through the drywall with the utility knife. Just cut enough of the top layer to mark the area. Use a drywall saw to cut through and around the marked area. Use a hammer to remove the cut drywall. Wear a good quality face mask respirator to protect your lungs from the airborne mold spores and dust created by the removal.

Spray the area with a disinfectant designed for use on surfaces susceptible to microbial contamination.

Place circulating air fans and/or dehumidifiers near the area to completely remove all moisture. This can take up to three days in severely flooded situations. An air conditioner can take longer if used by itself to dry the area. All wood studs, concrete and other surfaces must be completely dry before replacing the drywall.

Cut new drywall to fit the hole. Use a screwdriver or drill to fasten the drywall to studs with drywall screws. Spread drywall joint compound over the seams, apply drywall tape and allow to dry. Add additional coats of joint compound to smooth the area and feather the edges. Sand each coat of joint compound after it dries, and paint as desired.

Tips & Warnings

  • ShockWave is a brand of disinfectant specifically designed for disinfecting, sanitizing, cleaning and deodorizing mold-contaminated areas.
  • Always take safety precautions and wear proper safety equipment while operating machinery or using hand tools. Breathing airborne mold spores can cause serious long-term health problems.


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