Hold a rope against the corner of the window or door frame and pull outward at a 90-degree angle to the designated width of the awning. Measure this rope to determine how far the awning will stick outward. Measure the top of the door or window frame from one side to the other to determine the length of the awning.
Install a wall bracket at each side of the window or door frame with screws and a screwdriver. The brackets must be positioned at the top corner of the frame.
Attach a 4-foot-long aluminum bar to each side of the frame. Vertically attach the bar directly under the brackets. Create the horizontal supports by cutting two aluminum bars. Use the measurements taken from the first step as a guide.
Attach an aluminum bar the desired length of the awning to the sloped edge with a power drill and screws. Attach a second bar the same length to the other sloped edge in the same manner.
Prepare the aluminum sheeting by spray painting the desired color. For added protection, use spray paint designed for exterior use. Wait several hours for the paint to dry.
Cut the painted aluminum sheeting with a sharp power saw according to the measurements of the desired awning. Secure the aluminum bar measuring the length of the awning vertically down the middle of the sheeting.
Attach the sheeting with screws at the sides of the horizontal L-frame. Ensure the awning’s vertical section hangs down at a 90-degree angle.
Secure the body of the main awning to the horizontal frame with screws at the bottom and top. Secure the awning to the brackets and the base bars to the window or doorframe with several screws.
Create two triangular side panels from aluminum sheeting. The size of the panels should coincide with the measurements of the awning. Use several screws to secure these panels to the sides of the awning’s frame bars.