Another option is to install a vinyl underlayment.
Installing vinyl tile on rough concrete.
When it comes to mortar latex or epoxy options are best for installing tile over tile.
Plywood particleboard osb ceramic tile sheet vinyl or painted cement.
Now if your house is on a concrete slab and you have a vinyl floor.
You can lower high spots with a grinder.
This is a mixture of cement fine grain sand and water that will adhere the new tile to the old.
Level these off to create a smooth and flat area that are even with the surrounding hills.
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Plywood underlayment over it.
Sheet vinyl can be installed over concrete if the surface of the concrete is clean smooth and dry.
As long as that vinyl floor is adhered well to the slab not peeling up anywhere then you can install your tile right on top of it.
Repair any holes or cracks.
If your wooden subfloor is in really rough shape install 1 4 in.
You can sometimes lower high spots using a coarse grit abrasive on a belt or disc sander.
Any minor bumps can be removed with a cold chisel driven by a baby sledge hammer.
The concrete floor must also be free of cracks or the vinyl tile will eventually sag into the gap.
Used correctly tile leveling systems.
Any minor bumps can be removed with a masonry chisel and small sledgehammer.
Repair any holes or cracks.
The low spots need to be filled in with a mix of fresh concrete before installing flooring on uneven subfloor.
Buy the product recommended by the tile manufacturer.
Use a thin set product to install ceramic tile over existing tiles.
So technically if you are installing vinyl plank flooring onto concrete you already have a subfloor.
Allow it to dry apply your grout just like you would on any other type of tile installation.
Also consider that doors cabinets and other hardware might need to be reworked or replaced with new ones to compensate for the higher floor.
Tape a large piece of plastic over the concrete floor securing all edges with duct tape.
This will allow you to lay lvt over all sorts of surfaces.
Lay a 2x4 board down when the concrete has dried to ensure you have addressed all of the issues.
Vinyl tile can be installed over concrete if the concrete is clean smooth and dry.
To prepare a concrete subfloor for installing tile you ll need to do a different kind of preparation.
However some people prefer to add another thin layer of subflooring between the concrete and vinyl.