I've got a home with a dirt crawlspace -- post and beam holding up the house, with the piers for the posts in the crawlspace of course. I had someone come look at it recently to clean it up -- I've had rodents in there recently. There is currently NO INSULATION in the crawlspace -- none whatsoever. Crawlspace is about 1000 sq. feet, flat.
The guy who came to look at the crawlspace said that he can clean it up (the poly was dragged all over the place), install traps and seal off entrances. But he also said for more money he could just pave the entire crawlspace to keep animals from burrowing and tunneling under.
Seems to me like if the crawlspace is dirt, it should probably stay dirt. Something doesn't sound right about paving it. Are there downsides to paving what is currently a dirt crawlspace?