If your wooden subfloor is in really rough shape install 1 4 in.
Installing vinyl tile on rough concrete.
Lay a 2x4 board down when the concrete has dried to ensure you have addressed all of the issues.
Any minor bumps can be removed with a masonry chisel and small sledgehammer.
Tile leveling systems can help keep your tiles level aligned properly spaced and held in place while the tile mortar cures.
This additional layer can improve insulation and should make your vinyl plank flooring warmer and less resonant.
Allow it to dry apply your grout just like you would on any other type of tile installation.
However some people prefer to add another thin layer of subflooring between the concrete and vinyl.
Plywood particleboard osb ceramic tile sheet vinyl or painted cement.
You can lower high spots with a grinder.
Another option is to install a vinyl underlayment.
Use a thin set product to install ceramic tile over existing tiles.
Level these off to create a smooth and flat area that are even with the surrounding hills.
This will allow you to lay lvt over all sorts of surfaces.
To prepare a concrete subfloor for installing tile you ll need to do a different kind of preparation.
This is a mixture of cement fine grain sand and water that will adhere the new tile to the old.
Repair any holes or cracks.
The concrete floor must also be free of cracks or the vinyl tile will eventually sag into the gap.
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When it comes to mortar latex or epoxy options are best for installing tile over tile.
Repair any holes or cracks.
Now if your house is on a concrete slab and you have a vinyl floor.
The low spots need to be filled in with a mix of fresh concrete before installing flooring on uneven subfloor.
Also consider that doors cabinets and other hardware might need to be reworked or replaced with new ones to compensate for the higher floor.
Sheet vinyl can be installed over concrete if the surface of the concrete is clean smooth and dry.
Used correctly tile leveling systems.
Vinyl tile can be installed over concrete if the concrete is clean smooth and dry.
Use this home depot guide how to install a tile floor for more information.
So technically if you are installing vinyl plank flooring onto concrete you already have a subfloor.
You can sometimes lower high spots using a coarse grit abrasive on a belt or disc sander.
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.
Any minor bumps can be removed with a cold chisel driven by a baby sledge hammer.