Questions for tile pros

marleycat25February 22, 2012

I am doing an inexpensive make over in a very small 28 year old bathroom. The "lovely" hot pink 12" tile floor is actually in excellent shape but obviously it needs to go. The bath is on my second floor, I know it was put down on a proper mud base because I am the first owner of the house. Can I lay new tile directly over it.. I am afraid if I start tearing out, I won't get all the tile up evenly and I will have to do a whole new base... I did this at my shore condo but the floors there are all concrete. It turned out great. No problems. Can I do the same on my second floor bath with wood sub floors?

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If the tile and grout are in fine shape...nothing loose, no crack in the tile of grout...and you can handle the added gain in floor elevation, you can tile over it. Two things you want to do are clean/degrease the floor and scuff up the surface of the tile a bit.

For the scuffing, I use 36 or 40 grit on a belt sander. It's not the only way, there are no hard and fast rules. I recommend a grit 80 or lower, and a palm or random orbit sander can work to. You're not looking to take the glaze just want to get rid of the gloss by sctratching up the surface of the tile to give the thinset some tooth to grab a hold of.

Thinset. I recommend using bagged thinset that is unmodified. Sometimes referred to as "dryset". Then modify it on your own with a liquid latex additive. Modifying it yourself gives a better product.

    Bookmark   February 22, 2012 at 10:55AM
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