The staple tab edge is manufactured by perforating the bubbles 3/4" down each edge of the product. This creates a foldable tab which provides easier stapling for installation in wall, ceiling, and floor systems. Inhibits or eliminates condensation. Nontoxic and noncarcinogenic. Does not require protective clothing, goggles, or respirator to install. Ideal for basement walls, crawl spaces, or attic. Has R-16.8 value for crawl space applications and R-6.13 value for basement walls. Resistant to mold, mildew, and fungi. Excellent for use with livestock and/or produce. Class A/Class 1 fire rated. 5/16" thick.