I have the same problem.

I have decided to put down the plastic and attach it to the walls.
I plan to put rigid foam on all the crawl space walls. I will then remove
the floor insulation.
I have closed and sealed all my vents. They just let in more humid moist air
all the time here in North Carolina in the summer.
I have put a dehumidifier under the floor to get everything dried out. I am
running it non stop right now but when I get everything sealed and dried I
think I can set it so it only comes on occasionally. I may also open one of
the AC ducts to allow cool dehumidified air to flow into the crawl space.
When I am finished it will be more like a basement instead of a crawl space.

The requirement to ventilate the crawl space is based on research done in
the 40's before homes were air conditioned. I put a bunch of links on a web
page so I would not lose them. The recent research indicates that
ventilating a crawl space during hot humid summers is the worst thing you
can do.

www.bobbystuff.com

Bobby


" wrote in message
news:3632b.60806$xf.28105@lakeread04...
I have just moved into a new home and I have a problem with the moisture
in
the crawl space. I went into the crawl a month ago and the AC vents are
slightly dripping. This dripping is causing puddles on the plastic that is
covering the floor of the crawl. Mold has started to grow.

The builder was notified and they removed all of the plastic from the
crawl
space. The plastic will be replaced in a month because they believe the
moisture is from the wet summer we have had this year. They also mentioned
putting in crawl space fans to help move the air down there so the
moisture
won't build up.

Now, this is my take on things. I think the vent lines should be better
insulated so they won't condensate. I'm also not sure about having the
vents
opened all summer and closing them in the winter. Everyone seems to have a
different opinion on this.

The last thing I want is mold, termites and rotting wood in my nice new
home.

Does anyone have any suggestion or experiences? I would appreciate
anything
because this is our first home with a crawl.

Thanks.
CG