What moisture will you trap?? If the wood hasn't dried out yet its not going to.This sort of construction is going on all the time. And really it's not going to be hermetically sealed there will be some, albeit little air movement. If Geo NR Gee does install this system and with good windows he will have a minimal air exchange envelope that of which new homebuilders strive to obtain. He will in all probability need a air exchange unit to insure his family has fresh air to breath.
The goal is to heat it with a match. He is very fortunate to have siding on the outside that he has a chance to do this. If it was anything other veneer like brick not a chance.
We have first hand experience with this. Our home is 2x6 construction with vapour barrier on the inside. The outside is Dryvit 1 1/2 foam very nicely sealed. The air exchange performance is 1.9 ACH @ 50kp.
During some home renos we had seen the wood structure looks as good as the day it was installed. No dry rot no mold and that was wood that was exposed to the elements before we sealed it all up. If anything it was a lot dryer.
Randen
Last edited by randen; 10-04-12 at 05:11 PM..
Reason: Grammar
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