How to Install Kitchen Cabinet Crown Molding

Measure each leg of the cabinets' run from wall to wall. Cut and screw together an L-shaped 14 frame that follows the cabinets' top edges, but leave each end ⅛ inch shy of the wall. Butt and overlap the corners and countersink the screws. Screw reinforcing blocks to the back of the frame, as shown, then check to make sure it sits flush with the cabinets' faces.