GuardianLiner™ String Reinforced is a high quality crawl space vapor barrier made in the USA. This vapor barrier has a bright white surface and a tan back. The back is treated with an antimicrobial to enhance the GuardianLiner™ natural ability to fight mold and mildew. This crawl space vapor barrier is available in 12 Mil (actual thickness) and is 36” x 75’ for 225 Sq Ft of Total Coverage. GuardianLiner™ SR is made from first use virgin polyethylene resin. The top layer is pure white and helps your crawl space look clean and bright. This layer reflects light very well, allowing you to use fewer light sources to get the light you need to see and inspect your crawl space. The bottom layer is our antimicrobial layer, in tan, and this layer helps reduce mold and mildew growth on the barrier. The roll is 36” wide and 75’ long. For shipping cost and convenience we roll it up on a 87” wide cardboard core. This allows for easy handling. It is recommended to measure your crawl space first and then cut the GuardianLiner™ crawl space vapor barrier in your yard or driveway. Smaller pieces will be easier to carry into the crawl space and install. The vapor barrier should overlap 8’-10” on the floor and minimum of 4” on the wall. Seams should be taped using a high quality vapor barrier seam tape like WaterProof Seam Tape to help keep moisture under the vapor barrier. We are a small family owned business that was established in 2007. We take pride in making products in the USA while others move to importing. Every one of our crawl space vapor barriers has a serial number that we can trace all the way back to manufacturing and testing. Our products are tested for VOC’s and off-gassing by an independent lab prior to being offered for sale, insuring the highest quality, best performing and longest lasting crawl space vapor barriers offered today.