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Johns Manville kraft-faced formaldehyde-free fiber glass insulation is paper-faced to help control moisture in concealed applications such as exterior walls. For use in wood-framed attics and ceilings. Batts are pre-cut. Facing provides built-in vapor retarder for moisture control. Improves energy efficiency and provides sound control. GREENGUARD Gold Certified for office indoor air quality and SCS Certified for home indoor air quality.