depending upon the mil thickness, I use X amount of pins. I research everything and theses wont degrade for about 100 years. They fit a 1/4" drill hole perfectly and when i drill into mortar, I might add some Lock-Tite. They're perfect

After shopping locally and finding noting but thin plastic sheeting, I found Crawl Space Repair. Everything about my Vapor Barrier is amazing now. This was a great DIY project once I ordered the right products. Thank you for helping me keep my family safe...

Used it for the support of 15mil vapor barrier. We put it approx every 12" although you can space them further we just had plenty. There is no removing them so make sure you drill deep enough to install them all the way in.

I was thinking about skipping these and securing the liner to the walls with a batten strip instead. I'm glad I bought them. They work great; you just need to drill a 1/4 hole and push them in.

WOW! You guys are the greatest. I called several times with several questions before I purchased the 12 Mil GuardianLiner™. Everyone I spoke to was very knowledgeable about crawl space encapsulation. We searched the web and I found you guys. I called and if you told me once you must have told me 20 times to seal the vents. I could not believe this would work. I did it and ordered the GuardianLiner™, the Foundation Seal Tape, the Waterproof Seam Tape, the Foundation Pins and a hygrometer. I would never have believed sealing the vents and encapsulating would be the answer to a problem we have had for over 30 years. Had we know this last year or 2 years ago, we could have saved a lot of money on insulation. I will definitely recommend you and your company to everyone I see who says they have a moisture problem in their crawl space. I have another friend whose brother paid around $10,000 to have his crawl space encapsulated on the eastern shore of Maryland. We did it for a fraction of the cost. Excellent, excellent product and excellent, excellent customer service from Bob, Caitlynn, and Larry. Kudos! Thanks again, GuardianLiner™ User and Believer