Johns Manville Corbond® Open-cell Appendix X spray foam provides an R-Value of R-3.7 per inch, and meets AC 377 NFPA 286 Appendix X requirements for application without an ignition barrier in attics and crawl spaces. This low-density, nonstructural insulation allows for high yield while providing excellent heat, air and sound control. Recommended for use in residential, commercial and industrial applications.
NFPA 285 Continuous Insulation
NFPA 285 Continuous Insulation: README - NFPA Table and Details
Material Library: Johns Manville