7 Dry fit the second side wall between the front and back, exactly ¼" below the tops of the back and front. Check that it moves somewhat freely between the two (if necessary, sand down the edges). Measure and mark pilot holes exactly 9" up from the bottom of the side wall on either edge. Transfer the marks to the front and back. Drill pilot holes through the front and back into the edges of the side wall. Drive brads into the holes. Check that the side wall hinges open properly [fig. E].
8 Drill a hole 1" up from the bottom, through the front or rear face and into the edge of the hinged side. Slide a dowel or small screw into the hole to lock the side closed.
9 Paint the wings gloss white and the roof light blue. Place putty over all the screw heads in the body as desired and sand smooth. Finish the birdhouse body with a clear, no-VOC finish, if desired. Position the roof and drill pilot holes down into the tops of the front and back. Glue and screw the roof in place.