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Question:

Porcelain tile over ceramic tile?

The shiny surface ceramic tile is set unto a cement slab - it has been there 15 years or more with no cracks. Do I need to rough up the surface before I set the tile- if so how? I have tried sanding it (60 grit), wire brushing it - there is no effect on the surface. Also I live in a small town - we do have a Home Depot - do they sell a good bonding agent? If so what? Thank-you for your answer!

Answer:

To go over tile I ve used both Flex Bond and VesaBond thinset made by Custom Building products, Both are usually sold at Home Depot.. One suggestion when tiling over tile, allow a few extra days drying time before any foot traffic on the new tile . Moisture has no where to go when doing this and extra drying time IS required. Do NOT add a latex additive if you use a polymer type thin set, only a latexed based thin set.. No sanding is generally needed, just a clean , oil and grease free tile. Any questions you can e mail me through my avatar and check my qualifications there. GL
I have tiled porcelain over ceramic with long term results. make certain the surface is clean and free of any foreign matter, also use the best modified thin set available and u can also add a latex additive for added strength to the thin set.

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