Insulating an unheated basement garage
I have been framing out and insulating my basement garage. One side wall and the rear wall are below grade and I’ve built/framed one wall so far. I’ve used R-10 2″ of rigid foam on that wall and framed it out. I was going to use unfaced batts and then cover with drywall. I am also insulating the ceiling with rigid foam and using sprayfoam to air seal the edges and then use batts for the rest of the ceiling. Our master bedroom is above the garage.
So the thing is a friend of mine comes around today and said it was pointless insulating the garage interior walls as there will be no difference in temperature between the inside the outside. I can’t imagine and uninsulated basement garage with cold concrete walls being warmer then an insulated garage with 2″ of rigid foam and fiberglass batts.
Is this true?
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