Question by longtreebeard: how much does it cost to foam insulate interior walls of an average home?
i got a home for free but this home is over 100 years old and in poor shape but still free
Answer by luna
I don’t know about walls, but we did the floor of our attic a few years ago and it was around $ 1,000. It made a huge difference in how warm the second floor was. Our walls weren’t insulated either, just cinder block with plaster over them.
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