R-13 Unfaced Fiberglass Batt Insulation for 2x4 Walls

JM R-13 unfaced fiberglass batt insulation is designed for 2x4 wall cavities with 16-in on-center stud spacing. The formaldehyde-free batts help improve energy efficiency and add sound control, and can be installed by pressing in place between studs.

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Key Features:

• Sized for Standard 2x4 Walls: Pre-cut 16 in x 96 in batts for 16-in on-center stud bays in 8-ft wall applications
• Unfaced for Flexibility: No vapor retarder—ideal for adding to existing insulation or where a separate vapor barrier is used
• Thermal + Sound Performance: R-13 thermal resistance helps reduce heat transfer while also providing sound control
• Durable, Noncorrosive Fiberglass: Will not rot, mildew, or deteriorate and is noncorrosive to pipes, wiring, and metal studs
• Indoor Air Quality & Efficiency Credentials: Formaldehyde-free and ENERGY STAR / GREENGUARD Gold certified (per listed product certifications)

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Specifications Table:

Specification	Details
R-Value	R-13
Insulation Type	Fiberglass batt
Faced/Unfaced	Unfaced
Coverage Area	117.33 sq ft
Batt Width	16 in
Batt Length	96 in
Thickness	3.5 in
Stud Spacing	16 in on-center
Fits Wall Size	2 x 4 walls
Framing Type	Steel studs
Vapor Retardant	No
Sound Barrier	Yes
Formaldehyde Free	Yes
ENERGY STAR Certified	Yes
GREENGUARD Gold Certified	Yes
SCS Recycled Content Certification	Yes
For Use in Walls	Yes
For Use in Basements	Yes
For Use in Attics	No
For Use in Ceilings	No
For Use in Floors	No
For Use in Crawlspaces	No
Package Type	Multi-pack
Coverage Area (Sq. Feet)	117.33
Total Package Quantity	55
Package Count	11
Multi-Pack Quantity	5
Bag Dimensions (L x W x D)	20 x 20 x 50
Package Weight (lbs.)	27
R-Value per Inch	3.7143
Maximum R-Value	13
CA Residents: Prop 65 Warning(s)	No
UNSPSC	11162400
Flame Spread Index	<25
Smoke Developed Index	<50
Water Vapor Sorption	<5 %
Standards/Certifications	ASTM C665 Type I; ASTM E136; IBC; Energy Star Certified; Greenguard Gold Certified; Indoor Air Quality Certified; NAIMA 16 CFR Part 460; Recycled Content Certified

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Frequently Asked Questions (FAQ):

Q: What wall cavities does this batt fit?
A: It’s sized for 2x4 wall cavities with 16-in on-center stud spacing (16 in W x 96 in L batts).

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Q: Does it include a vapor barrier?
A: No—this is unfaced insulation and does not include a vapor retarder.

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Q: Where can it be used?
A: Listed for use in walls and basements; it’s intended for steel-stud framing per the provided specifications.

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Q: How do I install it?
A: Batts are designed to be pressed in place between studs; cut as needed for obstructions (e.g., wiring, boxes).

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Q: Is it formaldehyde-free?
A: Yes—listed as formaldehyde-free.

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Quiet luxury starts behind the walls.

There’s an undeniable elegance to a home that feels calm—temperature steady, sound softened, spaces effortlessly serene. These unfaced fiberglass batts tuck cleanly into standard 2x4 cavities, delivering R-13 comfort with an added layer of acoustic ease. Pair them with a thoughtful wall finish and you create rooms that feel intentionally composed, not just built. It’s the kind of invisible upgrade that makes everyday living feel decidedly more luxurious.

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Upgrade your walls with JM R-13 unfaced fiberglass batts to boost comfort and quiet in the spaces you use every day.