R-38 Unfaced Fiberglass Attic Batt Insulation, 48 sq ft

Formaldehyde-free Johns Manville unfaced fiberglass batts deliver R-38 thermal performance for attics, ceilings and floors. Pre-cut to fit 16-in on-center wood studs, these durable batts improve energy efficiency and help reduce noise without a vapor barrier.

Key Features:

• High R-Value Performance: R-38 thermal resistance boosts energy efficiency in attics and ceilings
• Unfaced Convenience: No vapor barrier—ideal for layering over existing insulation
• Pre-Cut Fit: 16-in x 48-in batts sized for standard 16-in OC wood framing; 48-sq ft per bag
• Indoor Air Quality: Formaldehyde-free and GREENGUARD Gold certified
• Durable & Easy to Install: Will not rot or mildew; simple press-in-place installation

Specifications Table:

Frequently Asked Questions (FAQ):

Q: How much area does one bag cover?
A: Each bag covers 48 square feet with pre-cut 16-in x 48-in batts.

Q: Can I add these batts over existing insulation?
A: Yes. Because they are unfaced (no vapor barrier), they can be layered over existing insulation in attics.

Q: Where can this be used?
A: Designed for wood-framed attics, ceilings and floors; not intended for walls or masonry.

Q: What certifications does it have?
A: Formaldehyde Free and GREENGUARD Gold certified; ENERGY STAR partner product.

Q: What is the thickness of each batt?
A: Approximately 12 inches thick to achieve R-38.

Crisp, Quiet Comfort for Elevated Attics

This pristine, snow-white insulation layers your attic with a serene hush, refining the home from the top down. Its lofty 12-inch profile delivers a tailored, architectural neatness as it tucks cleanly between joists. Pair with matte-black hardware and pale wood decking for a modern, gallery-like attic storage zone. It’s a discreet essential that elevates comfort and signals sophisticated, energy-savvy living.

Upgrade your attic with JM R-38 batts today and lock in quieter, more energy-efficient comfort year-round.