Mark and Cut the Biscuit Slots
The reclaimed wood boards are glued together, side-by-side, to form the table top. Use a biscuit joiner to cut matching slots along the board edges (Image 1). Because this tool can be set to cut the all of grooves at the same precise depth, when you insert the biscuits in the slots and pull the boards together the result is a smooth, level surface (Image 2).
To cut the slots, first lay out the boards on a flat surface in the order you want them to be when the table is complete. Make a light pencil mark across the joints at 12” intervals to indicate the where the biscuits will be placed (Image 3).
Set the biscuit joiner’s fence to the correct height and depth so the cuts will be centered in the board edges. Line up the tool’s centerline with each pencil mark and make plunge cuts for each biscuit. Be sure to plunge the tool fully into each cut.
Test fit a biscuit into each cut. The biscuits should fit snugly into the slots, and when two board edges are clamped together the biscuits should seat deeply enough to allow the board edges to touch.