We cut the supports 16 in. long, but you can place the second shelf at whatever height you like. Screw the end supports to the walls at each end. Use drywall anchors if you can’t hit a stud. Then mark the position of the middle supports onto the top and bottom shelves with a square and drill 5/32-in. clearance holes through the shelves. Drive 1-5/8-in. screws through the shelf into the supports. You can apply this same concept to garage storage. See how to build double-decker garage storage shelves here.
Relax and enjoy your outdoor space with this smart patio combo consisting of a sofa and chair. You can adjust the size completely to make it fit perfectly onto your patio or deck, and both the sofa and chair have arms that double as trays for al fresco dining. And you can make your own cushions to fit, or use shop-bought ones and add your own ties, if necessary.