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©D.R.Wulfinghoff1999.AllRightsReserved. VaporBarriers ReferenceNote42 WhatisaVaporBarrier? PurposesofVaporBarriers WhereShouldtheVaporBarrierbeInstalled? VaporBarrierMaterials HowtoVenttheWaterVapor HouseWrapsareNotVaporBarriers WhatisaVaporBarrier? Avaporbarrierisanimpermeablemembranethat blockstheflowofairthro...