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GBlist: Re: Foam
On 9/5/97 12:00 AM Michael Molnar wrote:
>I am currently building a home in mid-Michigan. One of the local insulating
>contractors offers spray ureathane foam. This product is ported to be non-
>toxic and having a R-8.14/in. This seems wonderful, and I am considering its
>use. The only drawback I can figur' is that it will be impossible to run any
>addition wiring in these wall at a later time. I would be using the foam
>only on exterior(2x4) walls( Foundation to top plate) Does anybody have any
>experience with this product? It seems like a wonderful product.
If you like "natural", stay away from this. It's pretty wierd stuff.
But it works well.
I sprayed it on the outside of a compressed earth block home. The blocks
were dry stacked (no motar); this foam served not only to insulate the
whole house (I think its more like R6-7/inch), but also was the
waterproofing material, AND it even served a structural role by sticking
the blocks together. An inexpensive and blazingly fast way to build a
house. Finally, the rounded corners contributed to the "adobe" look we
wanted to achieve.
However, I would never use it on the inside of a house, unless it was to
mitigate problems or other issues. It's overkill for one; Icynene or
other products would seem to be more suitable. I question its
environmental impact, although I don't fully understand this issue. And
lastly, once you've touched it, most people would not want it near their
Regarding wiring, I think that is not a consideration; it will be
problem regardless of what material you use, so run whatever you can
imagine now, and note there are ways to surface wire that aren't bad.
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