Door sections are formed from heavy, 25-gauge galvanized draw quality steel
Section joints are roll-formed into a tongue-and-groove design which produces a superior weather seal
Inside stiles are made of galvanized steel and stile holes are "dimpled" for increased holding power
Bottom weather seal utilizes an aluminum retainer and extruded virgin vinyl
Extension or torsion springs are individually computer-calibrated to lift your door
Extra-heavy paint system consists of .25 mil. primer with rust inhibitor and a .75 mil. coating of baked-on polyester paint in your choice of white, almond, sandstone, or brown
Hinges are stamped from galvanized steel in a "wide body" pattern for greater stability and longer life
Models 2251/4251 include 1-3/8" polystyrene insulation with a vinyl back cover
Models 2255/4255 include 9/16" polystyrene insulation with a vinyl back cover
Models 2251/4251 R-value - 6.85
Models 2255/4255 R-value - 3.29
DOOR INSULATION
Each model utilizes a 25 gauge exterior steel skin. Chosen for their weather resistant features, models 2251/4251 utilize a 1-3/8" thick polystyrene insulation, while models 2255/4255 employs a 9/16" thick polystyrene insulation with vinyl back covers.
