When it can t two lengths join end to end in a scarf joint 4.
Join crown molding middle wall.
Known as splicing or a scarf joint this task is fairly simple with the right tools.
Cutting the crown molding to the correct length and angle is the most difficult part of its installation.
Mdf plinth 2 3 4 in x 4 1 2 in interior white mdf classic mid moulding block.
Most crown comes in 16 foot lengths so unless you re trimming out a gymnasium a single piece can usually span each wall.
Use scarf joints on long walls.
Set your miter saw to 22 1 2 degrees and make scarf cuts with the molding upside down just as you did for other miter cuts.