Reply by Dan Krager

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Dan Krager

3968 posts in 2202 days

#1 posted 11-06-2012 01:30 AM

For great insulation, consider using Nu-wool. I used it in a remodeling job I did and it far exceeded my high expectations. I was going to spray foam, but quickly dismissed that at $2000 just for the material. The paper backed fiberglass would cost almost $1000 just for the material. I don’t like fiberglass wool because rodents like to nest in it, build tunnels in it, and it is not air tight and insect proof. Neither does it dampen sound very much. A local Nu-Wool installer quoted me $600 to do the job, so he got it! I am SO glad. The stuff is everything it was advertised to be. It is basically cellulose fiber (shredded paper) mixed with a moist adhesive and a Borax derivative, so when it is sprayed between the studs and scraped level with them, it looks and feels like styrofoam when it is dry. Will NOT settle. It is indeed airtight, needs no other moisture barrier, and the Borax derivative makes it inhabitable to insects and vermin. I could not believe the total sound deadening of it. We can take a shower and flush the toilet and it won’t be heard outside the bathroom! I do not remember the actual R value in a 2×4 wall, but it was far higher than even the foam. Highly recommend it and I have no connection to the product.

-- Dan Krager, Olney IL One should always prefer the probable impossible to the improbable possible.

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