Insulating Plaster Walls
I have a cape cod in Wisconsin built in 1947. Block walls with a brick veneer from the basement to the rafters.
The walls are cold all winter long, and I finally decided that I really need to do something about it as the house quickly cools after the furnace shuts down. Having a concrete floor under the carpeting doesn't help matters!
I made a couple of exploratory holes, found that I have no insulation (not a surprise given the year) in the exterior walls.
I would love to blow in some insulation, however, being plaster walls from 1947, there is no vapor barrier.
With Wisconsin being a rather humid area, I assume anything I blow in would potentially become a mold trap rather quickly.
Is there anything I can do, short of ripping down the plaster walls, insulating, and replacing with drywall?
Thanks for any ideas!