[Strawbale] Frost Heave-basement/cob

[Speireag Alden]

On 2007, Nov 26, at 19:41, GuyW wrote:

> "The main con is substantial:  the existing concrete foundation is  
> a very
> effective vapor barrier...."
>
> ? Concrete is vpor-permeable, yes?

     In general, no, especially not four to eight inches of it, as  
found in most foundation walls.

     Thin concrete can be made vapor permeable.  But you have to  
intend it.

-Speireag.