Insulated sectional door panel

In the art of sectional doors, such as residential and commercial garage doors, there has been a continuing need to improve the construction of the respective door panels. Sectional door panels are commonly formed of rolled or extruded metal or plastic "skins" to which reinforcing members, hinges and insulation are attached or applied to form the finished door panel. Heretofore, for example, sectional door panels requiring insulation to be applied thereto have been formed by dispensing a quantity of a foamed-in-place polymer into a cavity formed by the rolled or extruded metal or plastic skin. This process may be difficult to control properly to fill all of the void spaces formed by the outer skin of the panel, particularly wherein the top and bottom edges of the panel are configured to provide a pinch resistant edge profile. Moreover, foamed-in-place insulation material may not provide sufficient stiffness or crush resistance for the insulation layer or the panel per se. A sectional garage door panel includes a skin part formed of a rolled metal sheet forming an outer wall and opposed top and bottom edges which may form a pinch resistant joint when adjacent panels are interconnected. Elongated prefabricated insulation parts are inserted in cavities formed by the top and bottom edges and a generally rectangular planar insulation part is insertable in a cavity formed between the top and bottom edges and between the first mentioned insulation parts. Channel shaped brackets are insertable in cavities formed by the top and bottom edges for reinforcing the skin part at a point of attachment of end stiles and hinge parts. A metal backer sheet forms an inner wall to protect the insulation parts. The brackets and one or more of the insulation parts may be secured to the skin part by an adhesive.