Johns Manville R-30 Unfaced Fiberglass Batt Attic Insulation, 58.66-sq ft Coverage (16-in W x 48-in L)R 30 Unfaced Fiberglass Batt Attic Insulation Formaldehyde free fiberglass batts designed for attics deliver R 30 thermal performance with sound control. Precut to fit 16 in on center wood stud cavities, each bag covers 58. 66 sq ft for efficient energy upgrades. Key Features: High R Value Performance: R 30 thermal insulation helps reduce energy costs and improve comfort Unfaced Design: No vapor barrierideal for adding over existing insulation layers

R-30 Unfaced Fiberglass Batt Attic Insulation

Formaldehyde-free fiberglass batts designed for attics deliver R-30 thermal performance with sound control. Precut to fit 16-in on-center wood stud cavities, each bag covers 58.66 sq ft for efficient energy upgrades.

---

Key Features:

• High R-Value Performance: R-30 thermal insulation helps reduce energy costs and improve comfort
• Unfaced Design: No vapor barrier—ideal for adding over existing insulation layers
• Precut for Easy Fit: 16-in x 48-in batts press in place between joists for quick installation
• Durable, Safe Material: Fiberglass won’t rot or corrode; formaldehyde-free and GREENGUARD Gold Certified
• Sound Control: Helps dampen noise in attics and living spaces

---

Specifications Table:

Specification	Details
Coverage Area (Sq. Feet)	58.66
Length (Inches)	48
Width (Inches)	16
Thickness (Inches)	10.25
Faced/Unfaced	Unfaced
For Use in Attics	Yes
For Use in Basements	Yes
For Use in Ceilings	Yes
For Use in Floors	Yes
For Use in Crawlspaces	No
For Use in Walls	No
For Use in Doors	No
For Use in Duct	No
For Use in Electrical	No
For Use in Garage Doors	No
For Use in Masonry	No
For Use in Plumbing	No
For Use in Vents	No
For Use in Windows	No
Formaldehyde Free	Yes
Framing Type	Wood studs
Insulation Type	Fiberglass
Maximum R-Value	30
R-Value per Inch	2.9268
Sound Barrier	Yes
Stud Spacing (Inches)	16
Vapor Retardant	No
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
Warranty	1-year limited
Package Weight (lbs.)	22.8
Bag Dimensions (L x W x D)	16.5 x 20 x 50
Package Type	Multi-pack
Package Count	11
Multi-Pack Quantity	4
Total Package Quantity	44
UNSPSC	11162400

---

Frequently Asked Questions (FAQ):

Q: How much area does one bag cover?
A: One bag covers 58.66 square feet with 11 precut pieces sized 16 in x 48 in.

---

Q: Can I install this over existing insulation?
A: Yes. As an unfaced batt without a vapor barrier, it can be layered over existing insulation where appropriate.

---

Q: What framing does it fit?
A: Designed for 16-in on-center wood stud or joist spacing in attics and ceilings.

---

Q: Is it safe for indoor air quality?
A: Yes. It is formaldehyde-free and GREENGUARD Gold Certified for indoor air quality.

---

Q: Where can it be used?
A: For use in attics, ceilings, basements, and floors; not intended for walls or crawlspaces.

---

A quiet, cozy attic upgrade with effortless precision

These pristine, unfaced batts slip neatly between joists, instantly dialing up comfort while softening household noise. The generous 10.25-in loft and R-30 rating create a plush thermal blanket that feels tailor-made for 16-inch spacing. Layer them to build a serene envelope above bedrooms, then finish with clean access panels for a refined look. It’s a simple, luxe step toward a calmer, more efficient home.

---

Upgrade your attic with R-30 comfort—add Johns Manville batts to boost efficiency and quiet today.