If he has it blown in there with a water spray (ie: stabilized blow) it
won't move and it won't settle.

s


"Joseph Meehan" wrote in message
...
I would go for the cellulose. It tends to seal better. As for the
dust, that is only a problem if you are up there or if you have leaky
returns. The supply side will not pull any dust in and frankly if there
is nothing to move the stuff, I don't see there being a dust problem, once
it is in.