[GSBN] Vapor Barrier

[Jeff Ruppert]

Hello Everyone,

We are dealing with a picky building official and are interested in 
options to seal interior earthen plaster with a sealer that offers a low 
permeability and that is also non-toxic.  The building official is 
requiring the use of a vapor barrier on the interior and we are a little 
stumped as to what to use.  Code requires something with a perm rating 
of 1 or less.  Anyone tackle this particular one yet?

Jeff