The floor comfort underlayment is to be used with laminate or engineered wood NOT LVT or LVP.
Go with the Smartcore and approved underlayment. I have used that brand and had great results. Better to use products matched to each other.
Answer from RMDman on Stack ExchangeVideos
The floor comfort underlayment is to be used with laminate or engineered wood NOT LVT or LVP.
Go with the Smartcore and approved underlayment. I have used that brand and had great results. Better to use products matched to each other.
I'd use a 1/4" notched trowel with some stiff thinset mix. Trowel it on your floor surface leave the notches standing. Once stiff enough I'd fill the voids and flat trowel against the notches. This will bring your floor up the 1/4". A bathroom floor is so small and area it isn't that much work to bring it up 1/4".
Don't use another layer of underlayment, you can get too much deflection in the click lock system and break the tongues.
Considering installing vinyl plank flooring after having to remove the carpet due to a plumbing issue. I know lvp has underlayment already but have seen arguments for and against adding underlayment on a concrete floor. Thoughts? Also, is vinyl plank really that much better an option than laminate?