I have used this product for many years.This is the best material to put in your crawlspace. No vapors will pass through. Be sure to tape your seams.This company has the best price

Well, I bought it twice in a row. What does that tell ya? Good stuff. Good performance.

BUY THIS AND DO IT YOURSELF.

I found dealing with CrawlSpace Repair easy and efficient. In addition to the materials I purchased, I received very helpful advice—being a homeowner, not a professional. As to the products, the Foundation Seal Tape is absolutely excellent. Originally, I thought it was very pricey, but once I began using it, I changed my mind. This tape is great for this purpose. I used it to attach the vapor barrier to the foundation walls. Your 12 Mil GuardianLiner™ seemed very strong and should work perfectly. I’m sure there are other similar products on the market, but no customer of yours will go wrong with the GuardianLiner™.

Challenging crawlspace with wall height ranging from 2 to 3 feet very hard to work in. The product performed flawlessly, and my wife and I were able to install it easily in a couple hours. The foundation tape held the Silverback in place while we maneuvered the roll. The foundation pins went in smoothly and hold the barrier firmly in place. Finished taping the seams and it looks great. I would recommend this system to anyone. We noticed an immediate difference in temperature and humidity once the product was in place. Better than advertised and the assistance we received when ordering was top notch.