Dents and Dings.
Steel garage doors can accumulate dents and small dings over time, which greatly detracts from the door's appearance. To help minimize unsightly dents, Clopay® garage doors are constructed with true 24, 25, or 27-gauge steel. Thicker steel lasts longer and dents less. The lower the gauge, the thicker the steel. However, a "sandwich" constructed steel garage door with two 27-gauge steel skins and a bonded insulating core will be stronger than a "steel frame" door with a single layer of 24-gauge steel.
With non-insulated garage doors you may be able to push out the dings from the inside of the doors. If you are unable to do this, you may need to replace the dented sections or the entire garage door. Clopay sells replacement sections for most models. Check with your local Clopay Dealer or Retailer for details.