The 12 mill would have been an overkill for the vertical surfaces. I bought a roll of this reinforced 6 mill and proceeded to slice it into four lengths. I just squared it up in the driveway and lined the cut with the relief cut in the concert and then ran a sharp utility knife along the groove, worked perfect.

The 12 Mil Crawl Space Vapor Barrier, GuardianLiner™ is the ideal covering for my dirt floor crawl space. It arrived on time, it is easy to work with and it is both economical and tough and is of better than average construction. I plan on buying more when it is time to finish encapsulating my crawl space.

Good products – helpful and knowledgeable service. Your company is a pleasure to work with.

Product is durable & easy to work with in a crawl space, it is packaged tight.

When you purchase this product it is durable and very thick. Good stuff