anybody have any experience with using eucaboard under carpet? somebody installed this over old tile before we have carpet installed and it's pushing up from the staples. I'm concerned that if the carpet gets layed over this it will also push up
I'd either take it up or try to put screws in it. Staples won't hold masonite especially if it's pushed together too tight. It also tends to bow if not fastened in a small enough pattern. It's not a great product for floors.