insulating unattached garage
I have a 24x24 concrete block garage thant i am creating a workshop in. ceiling joists are 2x8's 16OC. There is a floor (nailed down plywood) on top of the joists.
I am installing a woodstove to heat the garage and want to know the best and cheapest way to insulate the ceiling.
My idea was to install the 1/2" rigid insulation sheets on the bottom of the joists and blow cellulose into the cavities.
How does fiberglass bats compare in cost to the blown in? Which is a better insulator?