I read somewhere that shellac is a good vapour barrier --- don't know about
its compatibility with other materials though... nor how long it would
last....

>
>After the membrane, I re-insulated with pink fibreglass and installed a
>polyethylene vapour barrier. I worry that the vapour barrier could be a
>problem, trapping any moisture that does get into the walls (from the
>service boxes for example). Glad I sprayed a liberal amount of rust check
>along the bottom of the walls.
>
>
>Alistair

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