I have a small "studio" that has an open beam ceiling - there is no attic
(or crawlspace) between the room and the roof. Since it has a small ridge
beam (2x) there are rafter ties that run across the room, but otherwise,
there is no framing structure at the roof.
I'd like to insulate this a bit and thought of putting insulation on the
underside of the roof sheathing, perhaps R-11. I'm worried though that
this will make the outside of the roof sheathing hotter, and thereby
decrease the life of the roofing shingles. Is this something I should be
Also, when it comes time for new shingles, can I insulate the roof
(exterior) and then put shingles on? If so, would this make it possible to
add the insulation on the interior on the underside of the roof sheathing?