I have a vented crawl space w/ dirt floor. It is approx. 8' x 21'. I called in a local insulation installer for a quote on what could be done. He suggested filling the entire void completely with blown in cellulouse insulation. I should mention that the crawl space is less than 18" high and no access.

Is it ok to place cellulouse on top of dirt w/o a vapor barrier?

The crawl space is and has been very dry since we've owned the house (2 yrs)

Thank You,

John Cushman