I have about 160 sq. ft. of the Shaw glueless laminate to install on a bare concrete slab. I also got the 2-in-1 underlayment that they sell to prevent moisture and heat loss (I think that is its function).
Question is I had someone make a strong suggestion to me that before installing the laminate, to install 1/4" (5.2 millimeter) exterior grade plywood over the concrete. This is supposed to soak up some of the variation in the floor (not much if any as far as I can tell) and help prevent moisture from affecting the laminate? Said to use liquid nails or some such adhesive to hold it down to the concrete.
But reading the manufacturer's instructions it says to not use the
2-in-1 underlayment over organic surfaces (i.e., wood subfloor?), and if there is any "wood flooring" on concrete to remove it before installing the laminate. Not sure if that statement was meant to include "wood subflooring" (which is not really "wood flooring", like oak is).I am going to call Shaw for clarification but just wanted to know if anyone had any practical experience they could share.
Thanks!