Hi, Im Scott and new to the site,
I have been building a new addition to my current detached garage for a larger shop.
This will be a 24X48 story and a half stick built building. Currently its all framed up and dried in.
My question is with the insulation, I am thinking I would like to use the spray in foam for the roof rafter which are: 2x6" instead of fiberglass batts.
My contractor says if w do this I do not need any vents, no gable vents, no ridge vent, no soffit vents.
This seems a little too air tight to me. I'm in North Carolina, I will heat the shop from an outdoor water stove when needed. Fiberglass batts will only get me to R-19 with the 2x6's . I never heat this much over 55 degrees so the R value may not all that important . My biggest concern is with the spray in foam being so air tight and no vents upstairs. I do have a window at each end though if that makes any difference.
Is the spray in foam the way to go this project?