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Johns Manville Spider® custom fiber glass insulation sprays-in filling all gaps and voids in your walls, significantly improving energy efficiency, sound control and family comfort.
JM Spider® Custom Insulation generates superior thermal performance with variable thickness levels which can fill 2x4 cavities up to an R-15 thermal rating, 2x6 cavities up to R-23, and six-inch steel stud cavities up to R-25. Because it is Formaldehyde-free™, JM Spider® supports better indoor air quality. This insulation also resists mold because it sprays in almost dry (less moisture content than wood framing), and is treated with a U.S. EPA-registered mold inhibitor to protect the insulation against mold. JM Spider® insulation can be used for both wall and ceiling applications. Custom homes deserve custom insulation. JM Spider® is the only choice.