Should I NOT put underlayment beneath laminate with foam backing?
We bought the Costco-Harmonics laminate flooring. It's 5/16" thick plus 1/16" underlayment pad. We have wood subfloor above a crawl space. I'd like to put down a layer of cork underlayment (1/8" thick) to add cushion and some warmth under feet, but I read somewhere that you CANNOT use underlayment under laminate with backing (source). Can the flooring gurus on GW please confirm?