I'm in the midst of re-doing our garage. The space will be used as a nice woodshop/mancave. I'm looking for some suggestions in terms of insulating.
The garage is 12x20, and has about a 27 degree pitch in the roof with 2x6s as rafters. I live in Vermont so it's recommended to have around R50 insulation in the ceiling. If I retain the vaulted ceiling I'll need to furr out the 2x6's to achieve the recommended R value. From googling around people are pretty divided on furring (with a 2x4) vs. sistering a 2x10 to the existing rafter. I'm leaning towards furring because with sistering i'm adding 1.5" to every rafter which is less insulation value up there. But perhaps this is a non-issue?
If I do end up furring are there any sort of recommended techniques to do this? I plan on hanging 1" thick pine boards on the rafters and want to ensure the furring holds up with the added weight.
Forgive the myriad of questions, but any help/guidance is much appreciated!