Should I insulate between outer block and inner stud walls?
Like so many others, I have been given conflicting advice from “experts” in the insulation industry and I am now completely confused. I am building a two story home in zone 3 (montgomery, alabama). The external walls were done with concrete masonry units with cavity’s filled with pumped mortar. We then came to the inside and completely framed leaving 1/2 inch gap between framing and exterior block walls. We eventually plan to coat exterior of block walls with spray on portland, but that could be in all honesty at least a year down the road. We heat with an unvented gas fireplace and cool with window units for now. Future plans include Vogelzang wood burning firebox and minisplit HVAC system. ceiling heights are 10’4″ downstairs and 8’9″ upstairs with a 6/12 pitch aluminum roof laid over 3/4″ decking. Now to the actual question: Should I insulate any of the exterior framed walls with either batt or closed cell foam with or without a vapor barrier OR would I be better off just leaving a dead air space behind the sheetrock to allow the moisture to vapor out. Changing out the gas fireplace and all the moisture it produces is not an option.
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