Abstract: Door structure particularly suited for closing garage doorways and a method of making same include top and bottom preformed, weather-resistant metal rails (16, 17) on a single-piece, preformed, weather-resistant panel (11), together with stiles (19) along the back of the panel fastened at the ends to opposed fastening flange sections of the rails to form a strong unitary structure that is readily joined by conventional hinges into a sectional garage door. Two or more of the above described doors are joined side by side by single top and bottom rails and a flexible cover molding (62) adjacent inner ends for closing wider garage doorways.