First tip: Don't put garage door install questions in the Heating and A/C forum. General Garage Discussion forum is better place.

Now that I'm on the right sheet of music I used the foil backed foam board and did as jerseywild did.
Used a double layer of 3/4 thick foil covered foam board. Found it easier to work with (stuff in the door slats) then one thick 1.5" piece.
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