It goes without saying that preparation is the most important step before any tile installation.
The main objective is to create the most smooth and uniform surface possible so the tile can be evenly placed. Doing so will ensure your beautiful hard work and perfectly aligned backsplash, shower, or other tile installation will last for years-and-years to come.
Here’s a few tips for preparing the wall surface that you have, depending on the existing material where you’re laying the tiles:
1) NEW DRYWALL
New drywall is easiest because you already have a smooth, flat surface to work on. All you have to do is seal the walls with a primer and once dry, go over the wall with medium-grit sandpaper to create a slightly rough surface. Vacuum up the excess dust then go over the wall with a damp cloth or sponge to remove any remaining dust. But make sure the wall is completely dry before you start applying glue.
2) PAINTED OR TEXTURED DRYWALL
Begin by removing paint from the existing surface. If you see any holes or cracks in the wall, patch it up with a compound and sand the entire patched surface with medium-grit sandpaper. Use a vacuum to remove any remaining dust. Remember to clean the wall surface too.
3) PLASTER
If the plaster is relatively new, you can proceed by patching up any cracks or holes with a compound and sand the surface until smooth.
However, if you are really not sure about the condition of the wall, consult a professional to see if the plastered wall will support a fresh tile installation. If the plaster wall is good to go, I recommend applying a primer before adding any wall adhesives.
4) WALLPAPER
Always remove any existing wallpaper and glue before tiling. In doing so please make sure the surface is free of dust, moisture, and grease prior to applying the adhesive as it may affect the ability of the mortar to adhere to the wall.
5) OLD TILES
For a previously tiled wall, there are two options. Option one is to chisel off the pre-existing tile. Alternatively, you can tile directly over the old tile, however, this does not guarantee a clean finish. If you do decide to go with the second method, make sure that you treat the old tile with a grinder to create a proper surface for the adhesive.
Now you are ready to get tiling!
I'm Darren Kearns, Dublin's leading tiling professional, with over 30 years of experience under my belt. For more help with supporting your next tiling project, find me on my website or contact me directly, i'd love to help!
Darren
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