How to Build a Corner Awning

Set up a ladder in the corner where you want to construct your awning. Measure the space above the door or window and create a rough pencil diagram on paper with the measurements.

Determine the dimensions of your awning based on the area you want it to cover and the height of the walls. An awning that is steep will help shed water more quickly, but it also will require more material and need to start at a higher point to cover the same amount of ground as an awning with a flatter shape.

Measure an interlocking awning rail and mark the length of one side of your awning. Cut the rail to size with a hacksaw over a scrap piece of lumber. Cut the rail with the male component locked inside the female rail so that the finished rails will be the same length and line up properly.

Cut a second set of rails for the other side of the awning.

Remove the male awning rails from the female rails. Drill a series of small holes along the female rail where it will attach to the wall of your home if it doesn't already have predrilled mounting holes. Place the holes every 6 inches or so.

Measure and mark the location of the awning rails on the perpendicular walls of your home so that their highest ends come together at the corner. Install the female rails using an electric screwdriver with a drill attachment. If your home has a masonry surface, use galvanized masonry screws. Otherwise, use standard galvanized steel screws.

Measure the distance between the lowest ends of the installed rails. Cut a triangular piece of outdoor fabric with scissors so that its sides measure the same as the lengths of the two rails and the distance between their ends.

Attach the two male awning rails to the sides of the fabric that share their lengths using long strips of fiberglass adhesive tape. Fold another long piece of tape over the third side of the fabric to prevent fraying.

Insert the awning into the female rails mounted to your home. Snap the male rails into place.