insulating a cathedral (open-beam) ceiling?

[icebox]

I have an open-beam cathedral ceiling I would like to insulate with fiberglass batts and then "close-up" with tongue and groove planks. The spacing between beams is 32" and the cavity depth is 7". I have done some research and the opinions with respect to allowing for a 1" ventilation space between the top of the insulation and the bottom of the roof are conflicting. It would be difficult to allow for ventilation, so I dont want to do it if I dont have to. I live in western Oregon and we dont get a lot of snow,but the winters are wet. Any thoughts out there? thanks, John

[imeduc]

Check in to useing a polystyrene up there on the ceiling for the insulation.


ED

My mistakes dont define me they inform me.

[Hube]

Insulate with whatever, but make sure there is a minimum of 1" space or it will not breathe. This can result in many problems. Hube