Is fanfold residing board a vapor retarder?

To increase the R- value even a small amount, can I put Fanfold over fiberglas between rafters in a cathedral ceiling before I put a plastic vapor barrier over everything?" Answer: Fanfold foam insulation is manufactured as a re-siding board. I really cannot recommend using it as described.

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I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.