[Greenbuilding] Garage/Workshop

[Chris Green]

George J. Nesbitt wrote:
> Use Rigid foam instead of wall framing and spray foam, insulate all 
> the walls and the ceiling. As Keith says the floor is not insulated 
> and unless you can add insulation and another topping slab you will 
> still have a cold floor. And as Keith noted the garage doors need 
> upgrading to something insulated and weatherstripped.
It might help to keep the floor warmer if you also place rigid foam 
insulation on the exterior of as much of the footings as you can, or 
"exulation"-- running the foam to a depth lower than the frost line in 
your area.

The $1500 figure quoted for insulation seems way too high. Perhaps you 
might do a price comparison with, say, 2 1/2" foil-covered Insulboard or 
something similar? Place the foil side to the "warm" side, not to the 
block side.

Replacing the existing floor, if you want to consider that, with a 3" 
insulated slab will require about 4 yards of concrete (just over 3.77, 
actually)  and about 25 2 x 8 sheets of rigid foam insul. Gravel, Poly 
sheeting, Tuck Tape, and rebar are also needed.

And a lot of shoveling... a skid steer loader will make short work of 
that, though, once the existing concrete is broken up. Or cut, if it 
contains rebar....

Chris Green.