Can I lay stoneware slabs on top of marble or granite?

Before applying stoneware slabs on top of old material, whether this is terracotta, stone, marble or PVC, you must check the strength of the bottom substrate.
The existing material and the place where it is going to be laid must be dry and stable, with a perfectly flat surface free of any loose pieces which could affect the adhesion of the stoneware slabs.

To check the flatness, use a rule that is at least 2 m long and place it on top of the old flooring, in all directions. You may need to use a self-levelling product to flatten the surfacet.

All traces of oil, fat and wax should be removed by washing with water and caustic soda, followed by thorough washing. Chemical cleaning is not possible, only mechanical abrasion.

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How to make a floor plan:

With the help of a tape measure, measure the long side and the short side of your bathroom.
Create a simple drawing and write down the measures.
Also add structures: doors, windows and sanitary items.
If you want you can also add measures for doors and windows and their distance from the wall.
If you want to remove any sanitary ware please mark with an X.
The more information you add, more accurate your bathroom will be.

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