It is not recommended that you but self leveling screeds over vinyl tiles can cause yourself a bigger head ace in the long run and i know it can be a night mare of a job but always better to take tiles up and start from scratch.
Can you use self leveling concrete over tile.
Do not use self leveling compound over glazed ceramic tiles or over floors where a majority of the installed tiles have cracked.
The rapid setting self levelers can put you under a bit more pressure as your doing the pour but the advantage is that they are ready to tile over in a matter of just a couple of hours in some cases.
Another and i think better way would be to use a self leveling concrete that can be aplied in a much thinner coat and if head room is a problem would be of help.
Instead of concrete you might see products called self leveling underlayment this name means exactly the same thing as self leveling concrete.
Working with a self leveling compound as a do it yourselfer requires some practice in order to learn how to efficiently lay the compound on the flooring before it hardens and sets up.
The self leveling concrete can be applied to various thicknesses and will dry as a smooth topcoat over the primed tiles.
There is no danger for asbestos exposure now unless the floor is drilled or cut into.
Answered 20th jul 2015.
On the other hand the slower setting slu s can take more than a day before they re ready to tile.
Using a self leveling compound over your plywood subflooring is necessary in order to lay a ceramic tile floor.
Self leveling compound is a quick set concrete compound that is used for the installation of floors in new home construction remodels or renovations.
Once cured the underlying tiles will be fully encapsulated and not at risk of crumbling with age.
Now let s clarify some things concerning product names.
Wear work gloves safety goggles and a particle mask when mixing and applying the compound to avoid skin eye and lung contact.
If you were to use conventional concrete i would say you should pour a minimun of 3 inches both for strength and to ease leveling.
Self leveling concrete can be used as an underlayment for tile carpet or other floor coverings.
You can fill in dips and hollow spots in floors and reduce high spots by using cement based floor leveling compounds.