I have read a lot about proper insulation and ventilation, including some posts on this site, but none adequately answer my questions.
My goal is to operate an electric heat source in the winter and have ~60 °F temperature maintained when working in the garage. In the summer, I think we will typically leave the garage door open, however it would be nice to one day have it stay cool in there if it's 90-100 °F outside.
This is in Ohio, where we typically have temps of 0-95 °F throughout the year, it can also get pretty humid.
I do not have soffit vents, but there is a ridge vent on the roof already installed. I do not want to drywall nor do I want to build a ceiling.
As you see in the photos I have already insulated the walls with R15 Batt installation. Now I'm unsure where to go from here for roof 2x6's. I bought some radiant barrier R11-equivelent insulation (seen in photos as well), which I was planning to attach to the end of the 2x6's above, which leaves plenty of ventilation behind them, should be "ok" in the winter and pretty decent in the summer. However, not having soffit vents, I'm unsure if that is the proper use-case.
You'll see from the wall install that I have no concerns about a vapor barrier, and do not care to seal my garage 100% (I only got faced insulation because it was cheaper =) ). However, I am concerned about mold/moisture problems in the space.
I would love some feedback as to the proper way to proceed here. Ideally I can make use of my radiant barriers, and ideally I won't have to cut in soffit vents.