More in Outdoors
The base is where the stone of the patio meets the lumber of the cabinet. The material we used as the base and support for the outdoor-kitchen wall is a composite material that holds up well to moisture and weather over long periods. It's more expensive than lumber, it's worth the extra cost to avoid problems that could arise later, such as rot and premature wear. The composite is only used in the base structure where it serves as a weather barrier.
When the base is installed, a 3/4" overhang is left to allow for the plywood backing to be installed later. Use a 3/4" piece of scrap as a template to ensure the proper offset for the overhang.
Cut the composite material to length using the miter saw. Fasten to the bottom of the wall using deck screws. Tip: Screwing into composite material may leave a raised area or divot. Leaving the raised areas could make leveling difficult. Remove any excess raised material with a sharp chisel.
The patio surface may be sloped or uneven. Use leftover blocks of the composite material to make the wall level. Use a hammer-drill and masonry bit to pre-drill the holes. Secure the composite blocks with concrete screws. Check to make sure that the top of the wall is level, then brace any remaining gaps between the patio and bottom of the wall. Using thin cedar shims, make small adjustments to the cabinet wall and then level it.
Once it's level, anchor the entire bottom of the wall to the patio using concrete screws. Break off any excess shims.
Next, begin building the smaller support-wall dividers for the cabinets. These are built using the same techniques as those used for making the larger back wall. Once the first of the cabinet walls is built, refer to your plan for dimensions and place the first wall into position to check the fit. Build the remaining cabinet walls.
After the first two cabinet walls are built, attach the bottom shelf. Screw one 2x2 to the bottom edge of each cabinet wall. Insert the plywood shelf and brace the top of the cabinet with two 2x4s.
Flip the cabinet upside down and anchor a piece of composite to the front edge (Image 1). Then set the cabinet in place and shim up the bottom until it is level. Once level, drive concrete screws into the bottom as well as into the patio to secure the cabinet (Image 2).
Attach the unit to the back wall using 3 1/2" decking screws.
After building the first two components to house the stainless-steel cabinets and sink, follow the same procedure to build the cabinet units that will support the refrigerator, built-in grill and side burner.
When building the cabinet units, remember where the utilities will be. Using a hole saw and a spade drill-bit, cut the holes for the plumbing.