Prepping the garage Options

[AWD DSM 1]

Couple bennifits to insulating the garage...

Radiant heat from the car motor is contained in the garage. My detached garage rarely got below freezing if I was parking a car in it daily. Handy if you are storing chemicals that can't freeze.

It's more efficient to heat an enclosed space. The furnace can only do so much. If your garage is full of holes, it won't be able to heat or cool to the same temperature as quickly.

The concrete slab holds cold/heat. If you insulate, it will more likely be holding the temperature that you want, rather than the opposite. Basically, when you get it to "operating" temp, it will stay there longer with the furnace having to work less.