Confused on air and vapor barrier with vaulted ceiling
Hello, I've done a ton of reading here and in just general and I'm thoroughly confused on what I should do. I'm in the middle of building a two story addition off the back of my house in central Pennsylvania. I've used scissors trusses and have fully vented soffit with a ridge vent. I plan on using knotty pine 1x6 on the walls up to a chair rail and drywall to the ceiling and then the ceiling will be 1x6 knotty pine.
Before I started doing any reading, I thought i was ok putting batt insulation between studs/trusses with a 6 mil poly vapor barrier over that and then my 1x6 tongue and groove knotty pine. After reading, it appears as though that is not a good idea as the 1x6 boards leak way too much air. I don't really want to put up drywall first and then the 1x6. Is this a proper way of doing it: batt insulation, 6 mil poly vapor barrier on the bottom of the truss, rigid foam taped to completely seal and then the 1x6 tongue and groove?
Also, how should the walls be done for proper air sealing? Any help would be greatly appreciated as I'm very confused at this point. thank you
Posted Jun 29, 2014 10:00 AM ET
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