Shower walls need to be covered in sealed tiles, a fiberglass shower surround or some other waterproof surface. However, that's not enough protection from the water in the shower, so the wall behind the surface covering has to be moisture-resistant as well. Regular drywall will soften and crumble if it gets wet, which is why drywall in showers needs to be a moisture-resistant variety, including greenboard and wet-rock.
Instructions
1. Measure the width of the longest wall in the framed-in shower area, across the exposed studs.
2. Transfer the measurement to a piece of moisture-resistant drywall, using a pencil and level. Cut the piece by scoring it with your razor knife alongside the line and then snapping it in two at the score.
3. Set the cut piece to the wall, so it's sitting on the floor. Secure it by shooting galvanized drywall screws every 6 inches along each of the studs behind the sheet.
4. Set the next piece of drywall above the first, securing it in the same way. Use your drywall saw to cut out holes in the drywall for the fixtures as needed. Repeat for each wall until the whole interior of the stall is covered.
5. Press drywall tape onto all the seams between the sheets of drywall. Apply joint compound over the tape, using a drywall knife. Get the compound flat and smooth. Let it dry for eight hours.
6. Apply two more coats of compound over the seams, keeping each of them flat and smooth, with each slightly wider than the one before it. Let the final layer dry for 12 hours.
7. Smooth out the seams with your drywall sander. The wall is now ready for a tile or fiberglass shower surround.
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