Quote:
Originally Posted by pope04
.....I'm going to heat it..........
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I just finished insulating mine. However I think to determine what you need; you may need to qualify that statement. Are you going to heat it and keep it at a certain temp all winter long, or are you going to heat it once a month when you work on the car? Or, are you wanting heat so that when it drops down to -30 outside, you can keep it +5 in the garage?
I can't tell you from personal experience until the spring, but I went with just R22 Roxul in the ceiling. My neighbour has the same size garage as me, and he has R20 all around. Last winter I was in his garage when it was -20 out, and without heat it had to be about 0 in there.
One other thing to keep in mind, I found there's quite a difference in the temperature at the ceiling in the garage than on the floor. (I have 10 foot ceilings.) So I think I might buy a cheap ceiling fan to help circulate the air.