Pad or no pad between 2F wood subfloor and laminate flooring?
I’m installing laminate flooring over a plywood subfloor in a second story room. The laminate comes with a foam pad attached to the underside (which can be easily removed). I’m concerned that the pad will block moisture from rising and cause mold growth on the subfloor layer. I Googled about this but advice is mixed on whether or not to use a vapor barrier in this situation. The manufacturer’s instructions say to use a vapor barrier over concrete, but they’re silent on whether a vapor barrier over wood on the 2nd story is good or bad. So my choices are:
(1) Use the laminate with the padding attached.
(2) Rip off the padding and install over a breathable pad, like Insulayment.
What say the experts?
GBA Detail Library
A collection of one thousand construction details organized by climate and house part