- Nov 20, 2008
- Reaction score
As I understand it, the moisture barrier is to avoid your scenario. Condensation appears on the warm side of an object (think of an operating propane tank or a cold glass of water or item taken out of a freezer). That is why you want the moisture barrier on the warm side of the equation, so that the moisture is kept away from the insulation that is on the cool side.To me, it still seems like if, in the ceiling or the walls, you have a vapor barrier against the warm space, then insulation then your green board or sheet rock, your gonna trap the 70% moisture in your storage room between the vapor barrier and the insulation. Won't that eventually destroy the insulation properties of fiberglass batting?