Re: best way to insulate detached garage?
The garage was built in 1961 and originally had no ventilation at all. I reroofed it four years ago and intalled a full length roof vent on the peak. There's a 1 1/2" gap at the peak, only partially blocked by a 1"X6" board, so I thought I'd take advantage of it to get some ventilation up there. Since then I've increased my shop time considerably and now I want to use the shop during times when it's cold but not when there's snow on the roof. I'll leave the walls alone (except for paint), and use styrofoam panels to insulate the aluminum door. But I want to insulate the roof if possible to keep the heat in. Kind of a big ice shanty to work in. I took some pics:
Exterior of garage. Part of it is a hot tub room. The rest is garage/shop.
The eves. No Sofit, no ventilation.
Interior walls are Celotex tar board and tons of "stuff"
The roof interior peak. Joists(?) are 24" on center, when they're lined up. Crude but pretty strong.
Inside shot of the eves. No airflow at all that I can tell???
Behind the hot tub room is 8' more shop space. That's where I'll put the little wood stove in the Winter, maybe use a fan to circulate air into the bay area when working in there. I'll take the woodstove & pipe off in the Summer. Maybe use the stovepipe through the roof to mount a bathroom-type vent fan?
So, is it worth getting 24" wide kraft faced pink and doing the roof between the joists(?)? I could even hang an old ceiling fan up there to blow warm air back down. If I don't block the ridge vent won't I just set up a convection current where all my heat goes out the peak and I'm left in the cold? I've got a lot of stuff stored in the rafters so I really really don't want to seal off that "attic" area with a ceiling.