Install Tile
on Wallboard
Wallboard (drywall) is more flat and smooth than old-fashioned plaster walls, which is an advantage when hanging tiles. However, it also tends to be a little softer than plaster, and may have cracks or holes in the joint compound at the seams between the boards. If you're going to hang wall tiles over wallboard, preparation of the wall is key. Patch and sand as needed, then seal it all with a good sealing primer. Tiles shouldn't be installed directly over wallboard in a bathroom; you should install cement board first because it holds up better to moisture.
Instructions
1. Run the edge of the drywall knife over the whole surface of the wall, knocking off any raised areas of plaster at the seams of the wallboard or any other obstructions.
2. Scoop up some joint compound on your drywall knife. Spread it on the wall at any points where there are cracks, holes or dips in the wallboard surface. Scrape the flat edge of the knife over the areas so the plaster is completely smooth. Let it dry overnight.
3. Lightly sand the joint compound that you laid. Paint over the wall with sealing primer, laying a full, even coat. Let it dry for at least 24 hours.
4. Mark a vertical line and a horizontal line across the whole wall, with the vertical line at the center, and the horizontal line near the bottom, at the height of a tile plus 1/4 inch. (Example: If you're using tiles that are 6 inches high, the horizontal line should be 6 1/4 inches off the floor.)
5. Use your notched trowel to spread thinset mortar on the wall where the two lines intersect, covering a few square feet. Press the tiles into place along the lines, putting spacers between them as you go. Continue spreading mortar and hanging tiles, using the lines as guides. Cut the end tiles to fit against the adjacent walls with your tile saw. Let the tiles set overnight.
6. Grout the wall by wiping grout across the tile face with your grout trowel. Press the grout into the spaces between the tiles while squeezing it off the tile surface. Use a damp sponge to remove the excess grout from the surface.
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