Use a level to identify the highest and lowest points of the ceiling. Determine the difference in height between these two points. This will give you an idea of how much you will need to adjust your crown molding pieces.
Step 2: Install Furring Strips
Furring strips are thin pieces of wood that will help to level out the ceiling and provide a secure base for the crown molding. Cut the furring strips to the appropriate length and install them parallel to the ceiling joists. Use a nail gun or screws to attach the furring strips to the joists.
Step 3: Adjust Crown Molding Pieces
Measure and cut the crown molding pieces to the desired length. Be sure to account for the unevenness of the ceiling. You will need to cut the pieces at a slight angle so that they will fit snugly against the furring strips.
Step 4: Install Crown Molding Pieces
Apply adhesive caulk to the back of the crown molding pieces. Press the pieces into place against the ceiling and furring strips. Use a nail gun or screws to secure the pieces in place.
Step 5: Fill Gaps
Use paintable caulk to fill any gaps between the crown molding pieces and the ceiling. Smooth the caulk with your finger or a putty knife. Allow the caulk to dry completely.
Step 6: Paint Crown Molding
Paint the crown molding pieces to match the ceiling. Be sure to let the paint dry completely before moving on to the next step.
Step 7: Enjoy Your New Crown Molding!
You now have successfully installed crown molding on an uneven ceiling. Enjoy the beauty of your new moldings and the added value they bring to your home.