[Greenbuilding] underfloor insulation R-values & materials

[Alan Abrams]

>
> Wet Spray cellulose is your friend.  Cheap, 100% recycled, always fills
> up gaps and odd shapes unlike Batts, you can spray it upside down into
> an overhead space (usually through a screen that looks like mosquito
> net)  It will fill up any shape space, and it is better R value than
> most of the alternatives.  The only thing better is biobased (made from
> soybeans) foam, but the price is steep.

LL- 

I agree with you in principle about the use of cellulose.  Please consider
this, however:  

We've been insulating existing basements by furring out the perimeter walls
with 1 5/8" metal studs held 2" off the wall, and foaming (with icynene or a
clone) between and behind the studs.  If there's a moisture problem we
install a conventional subslab perim drain and line the walls with enkdrain
(down to the subdrain) before patching the slab and installing furring.

What do you think about substituting cellulose in a case like that?

Cheers-
-AA