[Gary in WA]

R-38 for cathedral ceiling, R-49 otherwise, pp.55 or 56 (depends on where in WA): http://www.energy.wsu.edu/Documents/2009%20WSEC%20Chapters%201-10.pdf

Gary

 

[Gary in WA]

I gave you that in answer to this: "Washington state, room to be used as a Rec room or additional bedroom, heating is forced air, I believe fiberglass r-13 in ceiling,". R-13 in ceiling is usually a sloped (cathedral) ceiling in an attic where the rafters are minimal for the insulation required. Just showing our State Code requirement for both ceiling types as the one picture omits the roof. I do see a beam that could support a loft floor with rake ceiling above.....

Gary