I'm working to get the insulation finished and have finished the walls and I'm ready to move to the ceiling. I have no real "ceiling" as it's just open and I can see the rafters. It's a 12X24 barn style. Seems from what I can gather I should fill the 2X4 rafter because to allow for air to circulate above the insulation. Seen some roof "baffles" or channels that keeps the fiberglass from touching the roof skin. However it looks as those systems go from soffit vents and I don't have those. I do have 2 gable vents and 1 16' long ridge vent. So would I put the channels in and run the insulation/drywall up to the ridge vent?
Also I'm doing R13 in the walls any reason to move up to R15 in the roof or stick with R13?
I'll added some pics later.
Also I'm doing R13 in the walls any reason to move up to R15 in the roof or stick with R13?
I'll added some pics later.