20 Mil Crawl Space Vapor Barrier is a platform built specifically to give you a trusted source to compare 20 mil vapor barriers and discuss crawl space topics that you may have questions about. I’m a contractor, I’m a homeowner and I’ve been ordering crawl space encapsulation materials for decades. So I’ve been on all sides of the fence. Due to our local grounds up North, the 20 mil vapor barrier is the crawl space liner I use the most for my customers. Due to this, I built a blog dedicated to 20 mil vapor barriers. The purpose of this blog is to educate you as a contractor, a homeowner and a buyer. But most importantly, I offer my expertise and experiences to help you with your crawl space questions.