BIBS® offers outstanding thermal performance. You can achieve up to an R-15 in 2x4 construction and an R-23 in 2x6. R Values vary slightly depending on the density of application, but the elimination of gaps and voids, expert installation, and on-site testing guarantees superior performance. Remember, you can't compare R-Value by numbers alone. Your insulation system must be properly installed to achieve the results you expect from a premium system!