The slab doesn t have to be level for vinyl but it must be smooth and relatively flat.
How to level a floor for sheet vinyl.
Fill large cracks and dips with a floor leveling compound designed for concrete.
Sweep and vacuum the entire floor thoroughly before rolling out the vinyl.
If the area is very large use a long straight 2 in 4 in 5 1 cm 10 2 cm board and set your level on top of it.
Floors are rarely perfectly level.
Begin by pouring the mixture on the lowest places on the floor and wait for it to settle a little before spreading it at the edges with a trowel.
Leveling floors can be a diy project or left to professionals.
Any debris on the floor will show through the vinyl and will likely cause damage.
A belt sander is the easiest method if you are dealing with only slight humps although multiple passes may be.
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However you need to make the call as to the quality of the existing floor the level of imperfection you are willing to tolerate.
Flooring installation is all about preparation.
You will probably only have ten to fifteen minutes before the compound settles so speed is important.
In which case i would fill the worst gaps sand down the worst edges and lay down the vinyl.
When installing laminate vinyl tile or hardwood flooring it s important to know how to level a floor.
Sand the floor down if you are working with a plywood or particle board subfloor.
Try to aim for a thick milk shake consistency before you begin to use it.
If the floor is uneven lift up the board until it is level so you ll know how much flooring compound you ll need to even it out.