On my garage doors I used Radiant berrier from Lowes. Its sold in rolls and can be cut and applied with Gorilla Glue. Gorilla Glue will not eat thru the material. I did my research. My garage doors are operational and can be raised when needed. This blocks out the direct heat and sunlight on the outside of my garage doors.
I added the silver tape to seal the edges. Works great.
I did not need the foam approach but could if it was necessary, but not needed.
Good luck.
