Place cabinets next to each other and ensure they are level with each other. Adjust the feet if necessary by sanding down the feet.
To get the measurements for the bench top, measure top of the cabinets then add 2 inches to the front and the two sides so you'll have a lip around the edge. Use a circular saw to cut the top. We used a piece of salvaged wood.
Place the top on the cabinets and make sure it is centered and square. Insert a screw into the corners of the cabinets. Make sure the screw hits the scrap wood pieces underneath and not the edge of the cabinet. Slightly countersink the screws.
Fill wood screw holes with wood filler. Let dry and sand.
Add a protective sealer to the bench top. Use at least three coats and allow it to dry thoroughly.
Joanne Palmisano is the author of Salvage Secrets (W.W. Norton, September 2011). Visit her blog, also called Salvage Secrets.