Foam board insulation would be a more economical especially if you are supplying the labor see photo.
Insulating vaulted ceilings attic.
Stand on a ladder and using a caulk gun seal any areas where there is visible wiring or plumbing.
Check the joists and wall plates for any holes or openings.
Spray foam is a very expensive option however.
Materials commonly used for the insulation of the roof deck include.
Fiberglass insulation comes in lightweight batts and rolls precut to widths that match standard stud and rafter spacing.
Insulating the roof is a priority if the ceilings of your home happen to be part of the roof deck as is the case with cathedral ceilings.
Be sure to seal around any pvc pipes as well.
Before insulating vaulted attic walls you must provide an unobstructed route from the soffit vents to an exit vent to prevent damage to the roof from moist hot air.
Insulating a vaulted ceiling is similar to insulating exterior walls with.
Seal all ceiling openings.