If you use a chemical spray you will be the only one who ever did.
Roll out the plastic and address the moisture source in due time.
The plastic doesn't have to be fitted perfectly. If it gets wet on the
underside, it's doing its job.

"Todd" wrote in message
m...
Ok, I plan to cover the dirt in my crawlspace with plastic, as a
temporary measure to reduce humidity down there. Yes, I realize that
this is not a permanent fix, and yes, I realize that I need to address
the source of the moisture problem.

Here is my question: Do I need to treat the dirt with a chemical spray
first, before laying plastic? If so, what chemical? I am thinking
that if mold/mildew is a potential problem, that something nasty could
happen to the dirt if it is cozy in plastic for the winter. Opinions
please...

Todd