After a very severe and snowy winter I have had alot of damage due to ice dams.
I have a cathedral ceiling in part of my home and all of the damage is in the ceiling areas without attic space.
I do not have an ice barrier currently under my asphalt shingles. The current roof is from 1994.
My concern is that it has more to do with insulation or lack of in the cathedral ceiling.
What kind or insulation and how much should be in that space to prevent the room air from heating the roof?