Vapor Barrier question

Hey all -

Quick question regarding vapor barrier. Has anyone here put one up on a fieldstone wall? If so, did you attach it to the wall with a ramset and washers? If not, what method did you use to put it up?

I had a slight dampness problem in one corner of the room and I took a ton of precautions. Below I'll explain what I did. Please let me know if I could have done something better/different, or even if I went overboard.


I bought foam insulation and sprayed it in between all the rocks in this area, then I mixed Hydraulic cement and filled up all the gaps between the rocks. I still notice I have some dampness, as well as beads of water, but I can't tell if its just the wall sweating due to the humidity, or if water is actually making its way down.

After I did all that, I went outside and dug a hole roughly 2.5' deep x 2' wide x 4' long and I mixed (8) 80lb bags of quickcrete and filled up the hole, as well as the small gaps between the rocks. I also used some of the spray foam insulation in a can to fill in the deep holes.


I really want to get things going, but Id rather it take me an additional week or two of making sure this issue is under control rather then ripping walls out or whatever due to me not taking my time and doing the right thing.

Any help/suggestions is appreciated.

Thanks a bunch for all your help!

I'll try that out, Big. Thanks a bunch for the quick response. One more thing maybe you might now. My house is a 122 year old Victorian, and the kitchen was added on years after it was built, so the crawl space under it is VERY small, and its dirt. If I were to put a 6 mil plastic over all of it, do you think I would create a bigger problem if i don't vent it somehow?

Thanks!