Measure the width and height of the space for mounting the rear of your floating shelves. Measures the distance between the inner faces of the walls, not the outside. Join measures with paper and pencil. Repeat step 1 to confirm your numbers. A difference of up to 1/8 inch (3.17 mm) can be a problem when installing floating shelves. Cut a piece of wood to a width and height equal to your shelf.
Walking the same piece of wood to a depth of 2 inches (5.08 cm). This is deep enough for most models floating shelves. Try inserting it into the opening wooden shelf. You must stop and you get to see the wood through the screw holes on the surface of the shelf. Adjust as needed.
Drill hole through a piece of wood at intervals of 16 inches (40.64 cm) using a 1/8 inch (3.17 cm) narrower than the diameter of your screws. Drilled parallel to the measured depth of the piece of wood holes. For best results, given spaces between the holes so that there is a uniform wood on each side of the outer holes quantity. Monta aligning the fastener holes drilled against the beams inside the wall where you want to mount the floating shelves. Install the rack according to instructions shelf model.