jpranch
Platinum Member
We are in climate zone 6B. It is very dry here. Yet we have had some pretty bad mold issues. Three years ago we prohibited the use of 6 mil poly (Type-1 vapor barrier) from use on below grade walls. We are considering prohibiting the use of type-1 barriers for all residential construction. Are thinking is that the barrier must have a perm rating and allow the house to breath. Question: Dose any current code already prohibit this? Is this an over reaction or are we missing something here?