[Greenbuilding] PU & adobe

[wmdorsett at sbcglobal.net]

Rob, I agree and you can put a torch on it and it won't perpetuate a 
flame. You still have to coat it with something or sunlight will turn it 
to powder like most other plastics. I think for sealing and insulating 
the shells of old homes, this is hard to beat. It seals so well that  a 
air/air exchanger is essential to the combination.

Bill Dorsett
Sunwrights
Manhattan, KS

Vadurro, Rob, EMNRD wrote:
> Here in New Mexico, it has been quite common to spray polyurethane foam
> over adobe. It is one of the few ways to insulate adobe, without
> furring, etc. PU foam is vapor permeable and waterproof, good
> characteristics to have, and it seems to stick to adobe (and everything
> else!) just fine. I've not heard of any long term problems, but there
> may be some that I've not heard of. Although it's petroleum based, the
> long term energy savings seems worth it.
>
> -Rob Vadurro AIA
>
>
>