Why the subfloor must be flawless under vinyl
A 2 mm glue-down vinyl hides nothing: tile grout lines, cracks, mortar crumbs and even trowel marks show up as lines or bumps when light rakes in from a window. This is called telegraphing, and it cannot be fixed after installation.
So preparation sometimes takes longer than the install itself. We grind with a floor polisher, fill cracks, apply primer and, if needed, a 2 to 5 mm coat of self-leveling compound that leaves the surface smooth and absorbent for the adhesive.
If the base has deeper damage, such as cracked slabs or hollow-sounding areas, it first goes through our floor and subfloor repair service. We pick the adhesive to match the vinyl's spec sheet, from brands such as Bostik, Mapei or Sika.