Non-studio Contruction Question

Hi all Sorry to use this forum for a non-studio-related question, but you're the only ones I trust :) I'd like to insulate what is essentially an attic space in our theater, built in 1930, in a section that was the old projection booth and storage room. The room had a 7ft (!) ceiling at one time, which I've demoed, and the space will become offices. So now, I'm looking up at the underside of a roof made of 1x6's, with 2x6 roof purlins. Since the roof slopes up to the first bowstring truss, there's a couple curves and compound angles going on (the room is in the corner at the front of the building) which (to me) prevent a nice-looking drywall ceiling. My idea is to attach 2x2 cleats along the roof purlins, maybe with a 1" reveal of the purlins, and then drywall in between the purlins instead of across them. If I did this, what sort of insulation would I use in what would be about a 4" space between the drywall and the roof, would I need a vapor barrier, etc. (I'm in Los Angeles). Thanks in advance! Oh, and I meant the topic to read "Construction", not "Contruction". Too bad ya can't edit the topic line ;)

Aloha Joe,

I meant the topic to read "Construction", not "Contruction". Too bad ya can't edit the topic line

Actually, you can. :D Just click the edit button on the top right hand corner and edit your subject line. Click submit and you're good to go! :wink: Aloha 8)

When you say "insulation" are you talking about for heat/cold or sound? If it's for the former, I'd go with the highest R value you could get in the space (no matter what the material is). As to the vapor barrier, I think you DO need one and it should go on the surface that is warmest most of the time. len

thanks for the tip, Kendale! Hi Len! Yes, this would just be for heat/cold insulation, nothing acoustic. So would I use standard batt insulation with the paper barrier stapled to the cleats, facing into the room (thus being against the drywall)?

Being in Los Angles, I think that's the right side. If you were in a colder climate, I think you'd put it on the other side (against the roof). Before you run out and buy the insulation though, you might want to wait and have someone that knows more than me to verify that. len

thanks, Len :)