Floor radiant heat
I am building a 4 season room addition where radiant heating will be installed above the subfloor. The basement below the room is currently not insulated and is unheated; eventually could be insulated and heated (perhaps in a couple of years).
The subfloor is 3/4 inch AC2 treated plywood. Hydronic radiant floor heat will be installed above the subfloor with PEX tubing, plywood sleepers and aluminum emitters. I have available left over black roofing membrane that is either neoprene or EPDM (don’t know which). I am wondering if that membrane can be laid overtop of the plywood subfloor to act as the vapor barrier (and sound control) with the PEX tubing, sleepers, and emitters placed on top of it. I am looking for a reason to use or not to use it. If installed what impact will it have on future heating the basement below? Thank you for your help.
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