I have settled on an 7 x 16 Amarr garage door. The models I am deciding from are the Heritage 3000 and the Olympus 500.

The Heritage is cheaper by $450, made from 24 gauge steel, 2" thick, but is insulated with polystyrene with an r value of 9.

The Olympus is only 27 gauge steel, also 2" thick, but is insulated with the better polyurethane blowin in with an r value of 19 and has 1 year longer hardware warranty.

My question is "will the polyurethane blown in insulation compensate in strength against dents for the 27 gauge vs. the stronger 24 gauge with the glued in polystyrene?"

I live in a very hot climate where 100 degree days are normal for several months of the year with mild winters, but do not heat/cool my garage and no living quarters above it so r value is important. I read that rvalue 16 is not double of rvalue 8 and is only about an energy savings of 5% so if this is right my main concern is strength and stability.

Thanks for any knowledge you may have.