continuous insulation for concrete basement walls?
Most people simply frame a 2×4 wall 24″OC in front of the concrete walls, spaced 1/2″ apart to avoid the wood contacting the concrete, and take care of any unevenness of the concrete. And then fiberglass between the studs as usual.
But are there clever ways to insulate a concrete wall using less lumber and therefore less thermal bridging? Any clever ways to do continuous insulation without added cost? Even if I used rigid foam boards applied directly on the concrete there’s still the issue of attaching drywall or plywood as the finish layer, and getting the finished surface flat and plumb (assuming the concrete isn’t perfect)
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