Been a while.
Insulate, insulate, insulate.
Before, the Garage, now Workshop, would freeze in winter and boil in summer.
No longer after vapour barrier, 2" EPS and then chipboard with EPS between the joists.
Floor painted and then interlocking 'rubber' mats in front of machines and bench.
Never goes below 5° and above 25° when it's well below 0° and 30°+ outside.
Fan heater has temp up to 22° in about 30-40min on the coldest day, with an oil heater used to keep it near constant once temp up.
Rust now a distant memory thank goodness.
Geoff – Just about sorted out one of those bench sandblasting cabinets.