The length of the tub caddy depends on your bathtub and should be sized to fit it precisely. Measure the tub and add a few extra inches if you want it to overhang the outer lip.
To join the two boards together we used a biscuit joiner. The biscuit joiner cuts slots in the side of the wood for glue and the wooden biscuits which hold the boards together permanently and precisely in place.
Brush some wood glue into the slots and onto the edges about to be joined. Fill the slots with wood biscuits, clamp the boards and let the glue dry.
While the glue was drying we set off to make some simple walnut quarter round molding. Slice a 5/8″ x 5/8″ strip of walnut off of the remaining board from the lumber yard and run it through the router with a round over bit.
Since the piece was small I used feather boards to hold it in place while I slid the stock through.
Mark the molding length right on the main board for the tub caddy. We used a miter saw and set the fence at 45 degrees to cut the miters. A miter box would also work just fine.
I used a scrap piece of MDF to create a zero clearance fence to support the cuts in order to minimize tear-out.
Cut the walnut quarter round molding to the proper lengths to create a border for the tub caddy.
Fit the molding place on top of the now dry main board for the caddy. If everything lines up apply some wood glue to the back of the molding. Lay it down on top of the board and carefully line up the miters. I used a brad nailer to shoot some brads in place while the glue dried.
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