I'm remodeling a rental apartment and was planning to pull up the yucky carpet and put down Pergo and some cheaper similar laminate flooring. But checking it out today I found 3 layers of carpet, all flat commercial type, and the bottom layer seems to be glued to the floor. I think it was some kind of foam backed stuff. Pulling it up will likely be a terrible job. Anyone think I can just pull off the top two layers of carpet and lay the laminate on top of the old carpet?
I've seen it done over a single layer of extremely short pile loop commercial. This was directly glued with no pad. It worked out well and has held up for several years. If there is a foam pad under it you are probably asking for trouble. Going over carpet period generally isn't recommended.