Just overlap the poly a few inches. You're trying to cut down the
moisture, not remove it totally. Forget rocks unless you need a few
on top to keep the poly from flapping. Better ventilation is good too.

Just lay out the poly and see what happens, If you need to do more,
then do it after you see how the simplest solution works.

Jason wrote:
Hello,

I have heard different opinions on the use of gravel along with a poly
6mil vapor barrier. I am trying to conclude what the best solution is
to control the moisture in my crawl.

Here is what im working with:

1950's Cape Cod, Brick, 5' crawl (approx 1200sq feet). The ground is
mostly soft dirt, mostly dry but the furnace is down there on blocks
approx 2-3 feet off the ground, so its been running alot this winter
and we just bought the house. There is a sump pump that is located in
the crawl.

I have purchased 6mil Poly sheets to cover the crawl but have not
installed yet.

My question is will just the poly sheets be enough to keep moisture
down and prevent mold, or do I need to put some kind of stone either
under or over the poly?

If so what size stone, how much (thick) etc... OR will it even help
much one or the other...

Any suggestions or expierence is appriciated!


Jason