Unfaced Formaldehyde-Free® Fiberglass Insulation

Johns Manville Formaldehyde-Free Unfaced Fiberglass thermal and acoustical insulation delivers R-values up to R-49 and is offered in precut batts sized for standard wood- and steel-frame wall cavities, or in rolls for custom installation in any cavity size. Made of long, resilient glass fibers bonded with a bio-based binder, the product will not off-gas formaldehyde into the indoor environment and is GREENGUARD Gold Certified, supporting healthier indoor air quality and contributing to LEED credits.

Designed for walls, floors, and ceilings in new construction and retrofit, JM Unfaced Fiberglass reduces sound transmission through exterior and interior assemblies while resisting heat transfer. Because it is inorganic glass, the insulation will not rot, mildew, or deteriorate, and it is non-corrosive to pipes, wiring, and metal studs. SCS-certified recycled content makes it a sustainable choice for code-compliant thermal and acoustical performance.