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