Step 1
Measure the area between the counters or between the counter and the wall with a measuring tape. Write down the width and length measurements.
Step 2
Trace these measurements onto the plywood with a pencil. These are your cut lines. Work slowly to keep your lines even.
Step 3
Cut the plywood with a circular saw. Trim the plywood along the cut lines. Do not force the plywood through the saw to avoid creating jagged edges.
Step 4
Attach one end of the hinges to the counter with a cordless screwdriver and screws. Screw the hinges into the underside lip of the counter.
Step 5
Install a collapsible support bar with a cordless screwdriver. Place the support in the middle of the hinges. Screw it in to the underside of the counter edge.
Step 6
Attach the hinges and support bar to the plywood with a cordless screwdriver. Hold the plywood in place and attach both hinges and the support to the bottom of the wood. Test it to make sure it folds properly.
Step 7
Finish the flip-up counter to your preference. If staining the wood, sand it down first, and apply a coat of wood stain and then a coat of polyurethane. If painting, prime the plywood first and then paint it with an interior latex paint.