If you want a long lasting durable floor then install a porcelain tile over your existing marble floor.
Tiling over marble floor.
Using your notched trowel apply an even layer of thinset or mastic to the cultured marble.
But i wouldn t consider tiling over a stone as porous as marble.
Also consider that doors cabinets and other hardware might need to be reworked or replaced with new ones to compensate for the higher floor.
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.
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.
You will have to clean and scarify the marble before you installed the tile over it.
Then if you use the proper mastic the tiles should stick.
This is a mixture of cement fine grain sand and water that will adhere the new tile to the old.
Rinse the surface with clear water and let it dry.
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Standing water can penetrate the stone and discolor it.
Use a thin set product to install ceramic tile over existing tiles.
Buy a latex modified thin set one brand is flexbond and mix it in small batches to keep it from skinning over.
If you want to tile over a marble fireplace you have to address the problem of tile adhesion.
The modified mortar creates a stronger bond between the surfaces.
You can also install cement backer board.
Remove any moldy or loose grout with a rotary tool or carbide scraper.
However unlike ceramic tile marble is fairly porous so you shouldn t allow water to puddle and stand on the surface.
Yes it s possible to go over a stable tile with a good substrate.
Prepare the surface for installation.
When laying tile over tile it is best to use a modified thin set.
Vacuum the tiles and clean with detergent and water to remove dirt sealers and wax.
As for tiling over it.
When it comes to mortar latex or epoxy options are best for installing tile over tile.
Or larger and even more important when you re tiling over tile.
Complete adhesive coverage is critical on large tiles 12 in.
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.
The marble floor has to be structurally stable because your new floor will only be as good as the existing floor.