Insulating Concrete Block Wall with Embedded Joists
I own a 2 story concrete block construction home build in the 1920’s timeframe. The floor joists are set in the concrete block. The interior walls are comprised of vertical firing nailed into inserts in the mortar joints and horizontal lath nailed to the firing strips and plaster. I have insulated the core of the block walls by injecting foam.
I am planning on removing the plaster and maybe the lath, framing 2×4 interior walls rewiring, insulating and finishing with drywall. I have done some studying on insulating basement walls including reading a couple of Martin Holladay’s articles in Fine Homebuilding. In my study, I understand the concern with condensation and moisture and I want to make sure I am planning and executing this job correctly.
I live in climate zone 5 (SW Michigan) which got me thinking my above grade walls will get much colder than basement walls possibly requiring a different design. Any guidance is very much appreciated.
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