I'm in the process of laying down a 6 mil plastic vapor barrier in my
crawl space to assist in mositure control. I used this method at my
previous residence and it worked quite well. In my case, the soil in
the crawl space is damp but there is never any standing water.
Relative to laying down the plastic barrier, I plan on covering the
entire ground surface except for a small area near the crawl space
door which should allow some of the moisture trapped below ther barier
to escape to the outside. I've also installed automatic foundation
vents that open and close with changes in temperature and leave the
crawl space door partially open except in very inclimate weather with
a screen over the opening to keep out unwanted intruders.
My question for the group is if there anything else I should be
considering such as foundation ventilators to improve air circulation.
I would appreciate your thoughts on this subject.