Because vinyl is waterproof floating planks don t require an underlayment especially if they have a backing but you can install a vapor barrier if the floor needs extra moisture protection.
How to install glue down vinyl plank flooring on wood subfloor.
If it is uneven or wood slats you will need to apply 1 4 underlayment to the top.
Hard set adhesive is spread along the subfloor and then the vinyl planks are laid down on top.
Apply floor patching compound to any cracks in the old vinyl to create a smooth surface.
Hard set or pressure sensitive.
Step 4 spread the adhesive.
Vacuum any dust and.
Glue down vinyl plank flooring adheres to the subfloor using either one of two types of adhesives.
If the subfloor is perfectly smooth plywood then you could install the vinyl directly to it.
When you glue down vinyl plank flooring over a wood subfloor a double layer construction of the wood subfloor is required.
It can be constructed from wood plywood plastic or concrete.
You can t do that with glue down vinyl.
So technically if you are installing vinyl plank flooring onto concrete you already have a subfloor.
Allow the compound to dry and sand away any roughness with medium grit sandpaper.
Assess the condition of the wood.