Should I put insulation for out-side facing garage wall -- non heated?

Question

I am thinking of finishing out side facing wall of garage. The sides touch the house and ceiling is already finished by builder. Should I put insulation before putting drywall? It is non heated garage and I don't have plan to make it heated.

Answer 1

If the wall gets a lot of sun, you might be able to reduce the heat transfer, but your biggest insulating loss will be with the garage door and you may not see any advantage. You won't trap condensation so that shouldn't enter the equation. A room does not need to be heated or air conditioned to benefit from insulation.

Answer 2

You should not insulate unheated spaces.  There's simply no point, and it can trap condensation.

Answer 3

No offense to anyone, but you can't do any real harm by adding insulation. As suggested however, it may not show any noticible benefit. Most especially there is little you can do with a garage door, and not at all knowing in which compass direction the house faces, it may all be a moot point.

   Unless at some point you plan to spend time in the garage, work shop, play area, etc., live in a climate that gets extremes that disallow time in the garage, store items in the garage subject to damage from extremes, have no SUN shining on any part of the garage, have no upstairs room above, or attic crawl space above already properly insulated, your effort and expense may both show negligible results.

   It's pretty much a personal choice, and not at all cost prohibitive if you add insulation now. Hopefully the walls butting the interior have been well insulated, or at the same R value as the house exterior walls