George,
I remember what my garage was like before insulating.
Unpleasant to say the least, freezing in winter & cooking in summer, with the inevitable problems of condensation and rust.
All four of the above now vanquished thank goodness, and now a real pleasure to work in.
When I think back now, I shudder, and feel for those that don't have insulated workshops.
My only advise from experience, is to INSULATE.
You will never regret doing so.
Yes it is a pain moving things around, but oh boy, well worth it.
Geoff – Smug in my cool workshop. Ducking from brickbats 