Rinse the surface with clear water and let it dry.
Tiling over marble floor.
The marble floor has to be structurally stable because your new floor will only be as good as the existing floor.
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This is a mixture of cement fine grain sand and water that will adhere the new tile to the old.
Buy a latex modified thin set one brand is flexbond and mix it in small batches to keep it from skinning over.
Then if you use the proper mastic the tiles should stick.
When laying tile over tile it is best to use a modified thin set.
One strategy is to clean the marble with tsp and water then sand it with coarse sandpaper to etch it.
Also consider that doors cabinets and other hardware might need to be reworked or replaced with new ones to compensate for the higher floor.
Once installed routine maintenance of a marble tile floor is relatively easy it requires the same kind of sweeping and damp mopping you would do with a ceramic tile floor.
You can also install cement backer board.
Only spread a small area at first until you have set a few tiles in order to ensure that you do not spread too far ahead of yourself and allow the adhesive time to set up.
However unlike ceramic tile marble is fairly porous so you shouldn t allow water to puddle and stand on the surface.
Use a thin set product to install ceramic tile over existing tiles.
Complete adhesive coverage is critical on large tiles 12 in.
Using your notched trowel apply an even layer of thinset or mastic to the cultured marble.
The modified mortar creates a stronger bond between the surfaces.
As for tiling over it.
When it comes to mortar latex or epoxy options are best for installing tile over tile.
Standing water can penetrate the stone and discolor it.
Vacuum the tiles and clean with detergent and water to remove dirt sealers and wax.
Or larger and even more important when you re tiling over tile.
However it may be worth noting that you may need to wait a little longer between laying the tile and grouting to allow the thin set to properly cure.
Tiling over an uneven surface will give you less than stellar results so level out any globs of dried grout with a sander and secure loose tiles with fresh.
If you want a long lasting durable floor then install a porcelain tile over your existing marble floor.
Remove any moldy or loose grout with a rotary tool or carbide scraper.
Yes it s possible to go over a stable tile with a good substrate.
This is a bonding mortar with either a latex or polymer additive.
Try an area for three to four tiles to start and go from there.
But i wouldn t consider tiling over a stone as porous as marble.