My husband and I just completed our crawlspace encapsulation project using the 20ml Guardian Vapor Barrier from this website. It was a grueling job (not recommended for 58 and 60-year-olds) but we got it done. It took several weekends some weeknights, but well worth it. Humidity has already dropped 35%. Our next step is installing air ventilation system then we feel our foundation will be secure. A tip I would offer is to consider coverage of your crawlspace walls when ordering materials. Our house is about 1800 sq feet so I ordered two 1,000 sf rolls, but because of all the wall space and support pillars that needed to be covered I ended up needing to order an additional 1,000 sf roll to finish the project. So glad it's done!

I'm a contractor in Pagosa Springs CO. I have now encapsulated 3 crawlspaces with Guardian liner and other products from crawlspace repair. I couldn't be happier with the products, the instructional videos, (gave me the ability to do a professional job from the beginning) and the fast efficient service. My only complaint, they sent me a 2x tee shirt, I'm a large. Lol

The liner was really strong and easy to work with because it was so durable. It is rigid enough to move all as one unit once you have it spread on the ground. The only issue was first getting started because the 1000 square foot roll weighs 100 pounds so its hard to manage at first.

Could not ask for better than this. Installation was hard work, but that was to be expected. Product performed excellently and install actually went more smoothly than I expected.

Glad I spent the extra money. Easy to lay down. I would use again