We used this with the felt mat also available on this site. So far we have installed the barrier only on the floor and we plan to install rigid insulation on the walls next weekend. The musty smell in the basement is greatly reduced already and the whole house smells better even though we haven't finished the entire project yet.

Out of all of the products we have researched, this is the best option for stone foundations we have found, as well as the most cost effective. Easy to work with. There has been a noticeable difference in the air quality since it has been installed and we are only half finished! It has eliminated nearly all of the musty, basement odor. In the past, we have tried ionizers (which only masked the smell), and de-humidifiers, which helped but could not entirely remedy the situation.

Highly recommend the 20 mil for the floor of your crawl space. If you can afford it, use it on the walls as well. It is heavy duty and really makes a difference. Strongly recommend making accurate measurements and cutting it in a place where you can stretch it out as it comes folded onto itself.

After much research, I finally took the plunge and ordered enough product to do a 1700 sq ft crawl space. When the pallet arrived, I was pleased at how well it was packaged for shipment. Lots of care to prevent damage during shipping. The quality of the 20 Mil vapor barrier far exceeded what I was expecting. Everything I ordered was top quality. I could not be more pleased with the outcome.

Easy to work with. Feels even better over 42 liner. Cleans up well.