Superior polyurethane core with 15.0 R-value
Hot-dipped galvanized/annealed all steel construction for additional strength and durability
Special thermal barrier adhesive along the edges reduces heat and cold transfer
Tab and slot mechanical interlock for exceptional structural strength
Commercial grade steel lock box reinforcement for the lockset and deadbolt area
7-Gauge steel hinge reinforcement
49% more steel than a standard 24-gauge steel door
Galvanized coating is 433% thicker than B-class electro-galvanized steel
Lifetime Limited Warranty