[Greenbuilding] PU

[Michael K. Lough]

Rob said

"PU foam is vapor permeable"

Am I imagining things or did I read that using foam
(presumably PU ) in a roof or was it wall insulation
strategy meant one did not have to use  poly or (I am
guessing now) Tyvek as a vapour barrier?

BTW Does anyone know of anyone spraying soy based foam
in Ontario Canada or is this still as elusive as DIY
cellulose blowers around here?

Michael Lough

 


       
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