How to Install Three-Piece Crown Molding

To mark the room’s framing, affix painter's tape to the walls and ceiling, as shown, so that it won't be covered up as you work. Use a stud finder to mark the stud and joist locations on the tape. Affix 2x2 cleats to the framing using 3-inch screws. The cleats should lie inside the chalk lines toward the junction of the walls and ceiling, as shown. Where the ceiling's cleats are parallel to the joists, use toggle anchors for a secure installation. Mark their locations by driving 3-inch screws through the cleats and into the ceiling. Remove the cleats, drill larger holes in the ceiling where the screws penetrated it, and fit anchors into them. Reattach the cleats, driving 3-inch screws through the holes and into the anchors.