Tiny weekend cabin cathedral ceiling insulation
I have a tiny cabin (12' x 12' with 13.5 ft ceiling). It is used once every two weeks for a weekend.. I have 2x4 walls and 2x6 rafters. My roof is osb with steel panels. My wall cover will be wood stripes.
I did some work to insulate my roof but I think some mistakes where done. I filled every nook with spray foam (from can) including my roof Ridge which had this gap that I am not sure if was vent or not... Also, I filled the eaves with foam around the corners.. My logic was air tightness.
I then installed pink Batts (faced) between rafters. They are meant for 2x6 walls...
Reading that article about cathedral ceiling insulation by Martin Holladay - I might have done some mistakes... I can take down the insulation I put but of course I rather not - if possible.
1. If I understand the logic of the rot issue - if I install poly sheets (thick 6mil ones) over these Batts then the wood cover over it - I will reduce if not eliminate the passage of moist air into the roof cavities.. My cabin is small enough to do it in one sheet - eliminating cuts. Also, this cabin isn't used much. Then will this be possible to do? If not - next question
2. Following the article - if I want to do a non vented ceiling I can install rigid foam sheets and then Batts.. But if I am right my zone is 5 (upstate NY - near port jervis). So I will need about 4" of rigid foam just for that.. Then in a 2x6 it won't be possible / needed to have a Batts as well but an only rigid foam insulation scheme. Right?
3. Are there any other options for me?
Posted Sun, 09/15/2013 - 19:21
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