How to Build a Trash Shed

Install a 30-inch piano hinge between the pairs of doors, knuckle facing the inside framing. Rest each bifold door on a scrap piece of siding as you attach it to the inside edges of the opening, thus leaving a ¾-inch gap at the base. Use two 4-inch door hinges on each side.

Attach a scrap 2x4 near the top of each door framing with a single 2½-inch screw. When the doors are closed, lift the lids to spin these blocks behind the front crosspiece and lock the doors.