Jeff Guay wrote:
Hi,
I am in the process of insulating by detached garage. I have
installed a Hot Dawg unit heater and insulated the walls with R13
faced fiberglass. The garage has two floors. The upstairs is
unfinished and has dreams of becoming a game room or studio
apartment. When this happens I will install a seperate heating
system, but for now it will be unheated.
My question is what type of insulation should I install in the 2X8,
16" on center, ceiling of the garage? Since the floor above will be
heated someday, I am assuming unfaced. Should I go with standard
R-19 (6 1/4" thick), R-21(5 1/2" thick) or even something like
MIRAFLEX R-25(8 3/4" thick)?
I live in upstate NY, I believe the design temp is around 10 below.
Thanks,
Jeff

Vapor barrier towards the heated side, that is away from the garage.
Not in very warm climates that may be reversed.

--
Joseph Meehan

26 + 6 = 1 It's Irish Math