I have decided to have a new insulated garage door installed.
My next concern is to chose the R-rating I need for my locale.
I live in Arlington, Texas. A city between Dallas and Fort Worth.
The winters here are not too awfully cold, but the summers can have many
days of 100 degrees or hotter.
I've seen doors with R-rating from 5 to 18. I guess the 18 would be best,
but in my area do I really need that high of a number? Will the 5 or 9
rating be enough to keep my garage comfortable?