Order only took 1 week to arrive. 12 mil for bottom, and piers. 6 mil for walls. I have a micrometer tester and the thickness is right on. The length, however, is about 2-3 inches short of the listed length of 13'4". I'd give higher rating after it's actually installed.



I have plenty of interesting decisions to make. This is my approach:

1. Using the longest sheets as I can and cutting minimally to a get around the piers. I'm using 2 pieces to wrap the piers: one around the pier walls and one around the bottom that I'll tape together. I modeled how the pieces would wrap around circular and square piers to get it right.

2. Took 2-3 days to clear out the debris from new construction and leveling out the crawlspace. I pushed the clods up against the wall edges.

3. Plannng to keep drain pipes on top of barrier to the extent practical.

4. There are some wood supports that are up against the foundation walls that I plan to go around so they will be inside-above the encapsulated area rather than underneath.

5. I'll cut the long pieces before taking them down into the crawlspace of course. But I'm not cutting across where the piers are until I have it in the crawlspace. We'll see how that works out.

6. Tyvek suits, good dust mask, gloves, and goggles are a must. I had a lot of dirt mounds from the recent remodel that needed leveling with a small pick and small army style shovel. Too many clods to break up so I pushed them to the edges.

7. The foundation wall heights are not consistent so I'm just picking a line height and going straight across.

My order came within 2 days! The Diamond Product comes in a roll which was easy to handle and move around. I ordered two rolls of the 1300+ft diamond which was installed over a std 6 mil poly. The product is very tough and looks great inside a crawlspace. My application was on a new home and all the subs were really impressed at how clean plus how strong the application was. Overall, I was very pleased at the product and pricing.

This is a thick plastic, really strong. It is easier to start with walls and let the VB cover about 1-2 feet on the ground then lay the ground pieces and tape the seams. Use heavy duty scissors. Plan and cut your pieces and plan on how to unroll to make the install easier. Great stuff!

I have been very pleased at the quality of the 12 Mil SilverBack™ vapor barrier and with the Waterproof Seam Tape. The 13'4" width has worked very well for sizing sheets to lay down between the concrete pillars, and even the manufactured seam at half this width has been a convenient guide for cutting smaller sizes to go up the end walls or on the pillars. I've never undertaken such a big task in such a big, dark, damp space. But I found that proper lighting and steady work in one area at a time led to success that grew until the whole project was done. I ended up with a dry, clean, all-white encapsulation and look forward to using my crawl space for storage now that a dehumidifier has been hooked up.

This seems to be a good, durable vapor barrier. Unfortunately, there were some holes in it from the shipper. I patched them with the seam tape, but it's unfortunate that there isn't a safer way to ship this stuff.