How to Cut Vault Ceiling Trim

Vaulted ceilings often give a home an increased level of light and an increased sense of space. The design element can pose some challenges when it comes to decor, such as how to install curtains, light fixtures and trim around the vaulted ceiling. When installing trim or molding around the vaulted ceiling, it is usually crown molding that is used. However, any moulding or trim piece can help you create a transition from the vertical wall to the arched ceiling.

Measuring tape
Pencil
Protractor (for crown molding)
Molding trim
Lumber for mounting rail (for crown molding)
Miter saw
Finishing nails
Hammer
Level

Instructions

- 1
  Measure the length of each wall section at the base of the vault, and record the measurements. For crown moulding, measure the angle between the wall and the rear of the top edge of the moulding and the "drop" of the moulding or the distance along the vertical wall between the top and bottom interior edges of the moulding.
- 2
  Note how two wall sections join together, at an interior angle or an exterior angle. Record this information to determine how the end of each moulding piece should be cut.
- 3
  Cut the first piece of moulding. Test fit it in the location, and make any adjustments, as necessary. For crown moulding, use your angle and drop measurements to cut the mounting piece that will fill the angle between the vertical wall and the moulding. Nail up the mounting piece with a few finishing nails, using the level to keep it straight. Then, test fit the first cut crown moulding piece. Repeat this process for remaining trim pieces.

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