which material is not a vapour barrier?\npolyethylene film\nhousewrap\nkraft paper\naluminum foil\nvinyl…

which material is not a vapour barrier?\npolyethylene film\nhousewrap\nkraft paper\naluminum foil\nvinyl wallpaper\nquestion 13\nwhich statement about vapor barriers is false?\na vapor barrier is a vapor diffusion retarder\na vapor barrier has a perm rating of more than one

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