The 12 mil. poly is phenomenal! It is better then basement systems product, and cheaper!

Our crawl space was full of sharp edged gravel. The 550 felt was the perfect answer as a barrier between the 12 mil vinyl and the gravel. Easy to install and seam. im

It became almost like a cushion between the gravel and my knees. I would strongly recommend the use of this felt with any of the vinyl encapsulation product it made all the difference in protecting the vinyl.

Our crawl space was full of sharp edged gravel. The 550 felt was the perfect answer as a barrier between the 12 mil vinyl and the gravel. Easy to install and seam. im

It became almost like a cushion between the gravel and my knees. I would strongly recommend the use of this felt with any of the vinyl encapsulation product it made all the difference in protecting the vinyl.

It is a very good quality. I just had it installed in my crawl, so there is no way to rate the durability.

Great products... installed in conjunction with a radon fan and decreased radon from a reading of 8+ to under .12