Insulating order for finishing basement interior
I am using steel studs to frame the rooms in my basement. I have received confusing information regarding the order of insulation against the concrete walls. As I see it, there are three options: attach the polystrene sheets directly to the concrete followed by the wall framing, install the polystyrene sheet between the studs that would be against the concrete walls, or attach the polystyrene sheet to the room side or the studs that would be installed against the concrete walls. Which is the ideal configuration?
Install the polystyrene directly to the concrete, then build your walls. This will insulate the entire wall. If you insulate between the studs, the metal will still conduct cold from the concrete. I would put 1" polystyrene on the concrete, build your wall and then add fiberglass bats between your framing.
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