How to Build a Columned Room Divider

Run a bead of construction adhesive along the top of the base and cover it with a panel of MDF. Countersink pilot holes and drive MDF screws through the panel to secure it. Then, to account for the height of the 12 face-frame trim, add an MDF filler panel. Use scrap trim to inset it ¾ inch from the front and the end; inset it 1½ inches along the back edge to accommodate the back panel plus the trim. And to allow for out-of-plumb walls, leave a ¾-inch gap at the wall end; it will be covered by a face-frame stile in Step 8. Secure the filler panel with construction adhesive and countersunk MDF screws at each corner.