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Vent not needed except

Posted by Tom on December 12th, 2000 03:19 PM
In reply to INSULATION METHODS TO DORMER WALL by T JAMES on December 12th, 2000 11:23 AM [Go to top of thread]

when you expect moisture will migrate from the interior living space through the wall, then it is best to leave a gap between the insulation & exterior board. The way to stop moisture from migrating however, is to install a vapor barrier. Then you can insulate to your heart's content and not leave any gaps!

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