Hi all, I have some 4.5 mm click LVP to lay (on concrete). I was wondering if this has a maximum thickness of underlay that can be used? I have some 5 mm Sonic Gold left over from laying laminate and was wondering if this is ok - or not? Excuse the numptiness (!) but I don't want to waste my time having to lift this back up if the 5 mm stuff is not suitable. Appreciate any wisdom on the subject.
Not a good idea that underlay will compress too much and will not support the click system plus the risk of warping / undulation. The right underlay is normally around 1mm with 400 pSa (cs)
