If you re installing insulation directly under the roof like in a cathedral ceiling or attic ceiling make sure to leave about a 2 gap between the insulation and the roof sheathing.
Insulating vaulted ceilings attic.
Spray foam is a very expensive option however.
Stand on a ladder and using a caulk gun seal any areas where there is visible wiring or plumbing.
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.
Check the joists and wall plates for any holes or openings.
Fiberglass insulation comes in lightweight batts and rolls precut to widths that match standard stud and rafter spacing.
Foam board insulation would be a more economical especially if you are supplying the labor see photo.
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.
Insulating a vaulted ceiling is similar to insulating exterior walls with.
You may also insulate your roof to help regulate the temperature in an attic that is a part of your living space.