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Dec 19, 2017 at 7:18 comment added Bryce No such thing as "zero risk". Also your plan requires extending window frames, a big job that could easily be screwed up resulting in mold or rot.
Jan 22, 2015 at 21:00 comment added iLikeDirt My preference is no foam as well but rigid mineral wool could work instead. That said, I agree with both of you that cost-effectiveness of any such projects in the poster's region is questionable.
Jan 22, 2015 at 20:57 comment added DMoore I advise people to stay away from foam jobs for house like this... wouldn't even think about using blown-in cellulose. Heat readings after spending tons of money and opening 100s of holes in a house aren't much better than the before readings (and many of the foams are toxic).
Jan 22, 2015 at 20:51 comment added diceless The other issue I've seen with blown-in for walls is return on investment. For a medium sized home, you are looking 3-4k for someone to do the job and in such a moderate climate you will only see a savings of $100-200 on the heating bill over the winter.
Jan 22, 2015 at 20:41 history answered iLikeDirt CC BY-SA 3.0