Our new garage door replacement will always be made with 2″ thick sections. They will be either 26, 25, or 24-gauge steel. With steel gauge, you must remember the lower the number, the thicker the steel. You will see an enormous difference in non-insulated doors with other companies’ hardware. Often other manufacturers go “cheap” with non-insulated doors. All our C.H.I. non-insulated doors use “commercial grade” hardware, steel ten ball bearing rollers, and come with a manufacturer’s lifetime section warranty against rust through, splitting, and cracking. Non-insulated doors tend to be installed on detached garages, where it is not heated, detached from the home, and you want to keep the elements out. Note: all doors look alike from the outside and cannot tell the difference by just looking from insulated and non-insulated from the outside.