Mdf plinth 2 3 4 in x 4 1 2 in interior white mdf classic mid moulding block.
Join crown molding middle wall.
Use scarf joints on long walls.
Join sections of crown on long walls using scarf joints.
Item 243341 model mn1502145.
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.
Cutting the crown molding to the correct length and angle is the most difficult part of its installation.
Known as splicing or a scarf joint this task is fairly simple with the right tools.