hy,
If possible, it will be greatfull to have your hint for our construction.
We build a straw ball house in Quebec, Canada.
We already do the COB on the two side. It's a 2 inches of COB : sand, clay, straw and horse manure.
On the inside, we close the grain so the coat is smooth.
On the outside, we let the grain open and we do some keying for the last coat.
We will do 2 coats of lime for the exterior (around 1/4 inch for the both coats). We will put some casein, methycelullose and brick in powder.
We really like the aspect of the interior and if possible, we will keep it like that.
We are not sure if it will be okay for the moisture, because the exterior plaster will be a little less permeable than the interior because of the 2 coats of lime.
Because we read that
In cold climates, the trick here is to design the wall so that the exterior is at least as vapor permeable, and ideally more so, than the interior.
Do you have any clue?
Is it okay to do that?
Or, do we have to do also a lime coat inside? or a lime paint?
Or to put several coat of oil?
Or to put bee wax?
Thanks
Ianis
