hi everyone. for those who have done their own insulating of their garage/shops maybe you could offer me some advice. I have a double detached garage that is unfinished on the inside. I am looking to insulate it so I can work in there in the winter (Canada prairie winter). I'm not wanting to heat it all the time just when working out there. I am toying with the idea of blow in insulating for the walls covered by drywall but don't know what I should do with the roof. I'd like to keep the rafters open for storage. would using foam insulation between the rafters be a bad idea? anyone have experience with this that can give pros and cons? any venting suggestions? I'd likely run an electric heater but maybe propane. thanks.