There are no welded seams on this crawl space liner. All options, including the 12' wide, are one piece.
This crawl space liner does not contain any additives and is reinforced with a 1000 denier polyester cord to stabilize the layers and prevent tearing. The appearance of this crawl space liner is bright white on the face and black on the back. Although it shares the color scheme of different brands on the market it is not the same. You will not find small pin holes in the this vapor barrier like you will in other white/black combination liners.