A few people have told me that insulating the garage door would help keep the garage warmer, and by extension, the bedrooms that are above the garage. I was very skeptical, because the door is not tightly sealed, and every time you open the door, there is a huge air exchange.
It was a $150 gamble, but we gave it a whirl, and so far it has actually made a huge difference. Overnight, there has been a fifteen to thirty degree temperature difference between the inside of the garage and the outdoors – unheard of before I insulated.
I’m curious to see if there is a measurable savings in our natural gas bill over the upcoming cold season.