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Tile Over Old Tiles – How To Do It?

By · August 24, 2011 · Filed in How to Tile

I’m remodeling my kitchen and there was tile on the walls… Well, it wasn’t really tile, it was a plastic tile-looking product glued to the walls with something similar to thinset, but not exactly — it’s from the 1950s. What do I have to do to get the wall prepared for new tile? The surface is too rough now, at least that’s what people are telling me. Can I apply a new layer of thinset over this adhesive stuff and tile or do I need to do something to prepare the walls?

If your handy with a mud knife then the easiest way would be to smooth the surface with Durabond. The glue you have on the walls is a mastic but I would imagine it’s quite stable so you have no issues about “pops” as the previous answer said. Durabond sets up hard as a rock. It comes in different drying times. 20 min, 45 min and 90 min. I would recommend the 90 min. It will give you a greater working time. I mix the stuff in my mud pan using a kitchen blender. I go through at least 1 blender a year as I use them for mixing durabond, grout and thinset so I buy them just for this purpose. Try to apply it as smooth as you can because it is very hard stuff and you need to sand it smooth before priming. After the primer is dry, tile away.

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you can apply a new layer of glue, or you caneven out the wall by heating up the old glue and skraping it.
References :

You need to get the old glue off of the walls. Then you can apply fresh thinset and apply the new tiles. This will help prevent most of the possible future ‘pop-ups’ with the tile. If you leave the old glue, you can expect the possibility of ‘pop-ups’ happening, even possible cracks, in the new tile.
References :
Work in the industry.

If your handy with a mud knife then the easiest way would be to smooth the surface with Durabond. The glue you have on the walls is a mastic but I would imagine it’s quite stable so you have no issues about "pops" as the previous answer said. Durabond sets up hard as a rock. It comes in different drying times. 20 min, 45 min and 90 min. I would recommend the 90 min. It will give you a greater working time. I mix the stuff in my mud pan using a kitchen blender. I go through at least 1 blender a year as I use them for mixing durabond, grout and thinset so I buy them just for this purpose. Try to apply it as smooth as you can because it is very hard stuff and you need to sand it smooth before priming. After the primer is dry, tile away.
References :
professional remodeler 25 years

Behr brand paint makes a thicker type paint to cover and even out surfaces as you have just described. It was made to cover the popular "textured" type painting techniques, also used to even out "raised design" embossed wall paper. Try your best to get rid of most of the wall tile residue using a razor-scraper tool. Behr Brand Texture Paint sells for average of $25.00 per gallon. Your choice of any color-match possible. If the 50’s plastic tile is still on the wall = time to remove the drywall and start fresh. Good Luck
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