Johns Manville JM R-13 Unfaced Fiberglass Batt Insulation – 15 in x 93 in, 106.56 sq ft (11-Pack)R 13 Unfaced Fiberglass Wall Batt Insulation (15 in x 93 in) Johns Manville R 13 unfaced fiberglass batts are pre cut for standard 2x4 wood stud walls to help reduce heat loss and improve comfort. The formaldehyde free, unfaced design installs by friction fit between studs and also helps with sound control. Key Features: Sized for Standard 2x4 Walls: 15 in wide batts for 16 in on center wood stud cavities and 8 ft wall height. Thermal + Sound

R-13 Unfaced Fiberglass Wall Batt Insulation (15 in x 93 in)

Johns Manville R-13 unfaced fiberglass batts are pre-cut for standard 2x4 wood-stud walls to help reduce heat loss and improve comfort. The formaldehyde-free, unfaced design installs by friction-fit between studs and also helps with sound control.

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Key Features:

• Sized for Standard 2x4 Walls: 15-in wide batts for 16-in on-center wood stud cavities and 8-ft wall height.
• Thermal + Sound Performance: R-13 insulation helps improve energy efficiency while providing sound control in interior wall assemblies.
• Easy Friction-Fit Install: Unfaced batts press in place between studs and can be added over existing insulation.
• Durable, Noncorrosive Material: Fiberglass won’t rot, mildew, or deteriorate and is noncorrosive to wiring, pipes, and metal components.
• Indoor Air Quality & Efficiency Programs: Formaldehyde-free and ENERGY STAR/Greenguard certifications listed for this product line.

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Specifications Table:

Specification	Details
Product Name	R-13, 15 in x 93 in, Unfaced, Fiberglass Batt Insulation, 106.56 sq-ft
Category	Batt Insulation
Insulation Type	Fiberglass
Maximum R-Value	13
Faced/Unfaced	Unfaced
Width (Inches)	15
Length (Inches)	93
Thickness (Inches)	3.5
Coverage Area (Sq. Feet)	106.56
Total Package Quantity	11
Package Count	11
Package Type	Individual pack
Stud Spacing (Inches)	16
Framing Type	Wood studs
Fits 2 x 4 Walls	Yes
Fits 2 x 6 Walls	No
For Use in Walls	Yes
For Use in Basements	Yes
For Use in Crawlspaces	No
For Use in Attics	No
For Use in Ceilings	No
For Use in Floors	No
Sound Barrier	Yes
Formaldehyde Free	Yes
Vapor Retardant	No
R-Value per Inch	3.7143
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
CA Residents: Prop 65 Warning(s)	No
Bag Dimensions (L x W x D)	15.5 x 20 x 50
Package Weight (lbs.)	26.41
UNSPSC	11162400
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

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Frequently Asked Questions (FAQ):

Q: What wall cavities does this insulation fit?
A: It’s designed for 2x4 wood-stud walls with 16-in on-center spacing; each batt is 15 in wide and 93 in long.

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Q: Is this batt faced or unfaced—and do I need a vapor retarder?
A: This product is unfaced and has no vapor retardant; follow local building code requirements for vapor control in your climate zone and application.

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Q: How many batts are in a package and what area does it cover?
A: The pack includes 11 batts and covers 106.56 sq ft total.

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Q: Where can it be used?
A: It’s listed for use in walls and basements (not for attics, ceilings, floors, or crawlspaces per the provided specs).

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Q: Does it help with sound?
A: Yes—this item is listed as having a sound barrier and is described as providing noise control in interior walls.

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Quiet, Comfortable Walls—Effortlessly Refined

Think of this unfaced fiberglass batt as the invisible foundation of a beautifully composed room—softening sound, steadying temperature, and making spaces feel instantly more serene. Its clean, friction-fit profile slips into standard stud bays, supporting a crisp wall finish without added bulk. Use it to elevate bedrooms, offices, or media rooms where hush and comfort matter most. True luxury isn’t always seen—it’s felt, in the calm your home holds.

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Upgrade your wall comfort and quiet with JM R-13 unfaced fiberglass batts—sized to fit standard 2x4 cavities for a straightforward install.