One roll did a 200 sq ft room addition with about 18" going up the sides. Laid it out in the street, taped both seam sides, and carried it over to the open crawl space, Dropped it in and cut the corners. You could build a nice swimming pool with this vapor barrier!

I used 20 mil SilverBack HS on the floor of my crawl space over Felt 550. It is thick, strong, but flexible to work with. Air quality is almost as in my room. I enjoyed working with it so much that now I plan to help my friends do that same thing in their house

looks tough and much better than plastic film.

Used this product to encapsulate an 18 x 24 foot area in a new construction crawl space. The overall task was easy and the finished product looks great! I used white Gorilla tape to seal - matched perfectly and was more economical than some of the other tapes. Was also able to roll up on the walls to attach Silverback to the wall instillation. In total it took me a 3 hours, but most of the time was to move household items while installing the product.

I bought the 12mil silverback to cover my taller basement walls and the 20mil silver back to cover the crawl space area. Both products were great and I'd definitely recommend paying the little bit extra for the 20mil if it'll be going over anything uneven or if, like me, you put storage bins in the area you're covering. While the 12mil is nice and durable and good for walls, the 20mil is much more sturdy and a better fit for tear resistance.



Great products, though! The vapor barriers came rolled up and the other parts (I used the pins + seem tape) were in a box. Everything was included and the install was super easy.