Hi, I am a DIYer with little renovation experience. I recently purchased a 50's bungalow in Toronto, Canada. It had VAT in the basement. An abatement company removed the tiles, but residual cutback adhesive remains firmly bonded on the concrete slab. The cutback tested positive for asbestos. Can I lay floating (click) LVP directly on top of the old cutback? The slab appears mostly flat except around the drain. No efflorescence present (that I can see). Basement was waterproofed from the outside in 2014 by the previous owner. From what I have read on this forum, most people seem to recommend skim coating first with something like Ardex feather finish before laying down new flooring. Just wondering if this is necessary for floating LVP since it does not need to be bonded/glued to the slab? Thanks for any input!