If you are considering removing a flat ceiling in favor of constructing a vaulted ceiling first determine how to brace the roof with an alternative method of support for the rafters.
Vaulted roof framing.
Framing techniques for vaulted ceilings collar ties.
Collar ties are horizontal framing members that are essentially ceiling joists that have been moved upward.
Vaulted ceiling with trusses at frame stage a vaulted ceiling can be a great architectural detail for any room.
Some of these can support the roof and prevent ridge sagging and wall spreading.
Builders sometimes also prefer this construction method when they want to provide a large attic space or high vaulted ceilings often called cathedral ceilings.
If the collar tie option leaves too many framing members in the ceiling vault for your taste you can.
It can really make a space feel bigger without adding a lot of cost.
Roof structure definitions support choices for sloped roofs cantilevered roofs cathedral ceiling roofs.
Collar ties rafter ties tension beams structural ridge beams.
For example in texas where stick framing is common there are entire crews specializing only in framing roofs.
However constructing a stick framed roof is not always easy.
Rafters used to frame a vaulted roof are typically larger than rafters used to frame a roof that relies on ceiling joists for support.
Several options for alternative structural support include placing a very sturdy strong center roof beam along the roof peak line and attaching all of the rafters to it.