How to Install Three-Piece Crown Molding

Countersink pilot holes every 12 to 16 inches through the fascia and soffit. Lift the half beam into place, and drive 2-inch screws through the pilot holes and into the cleats. (Since you added ⅛ inch to the marking block in Step 1 to clear wall imperfections, there may be gaps between the beam and the walls or ceiling. These will be covered when the molding is installed.) Repeat for the adjoining half beam. Connect the beams by driving 1¼-inch screws through the end of the second beam's soffit and into the connecting block on the first beam. Repeat for the remaining half beams.