JM R-30 Unfaced Fiberglass Batt Insulation (19-in W x 48-in L) – 69.66-sq ft CoverageR 30 Unfaced Fiberglass Batt Insulation (19" x 48") JM R 30 unfaced fiberglass batt insulation helps reduce heat loss and improve sound control in wood framed spaces. The unfaced design (no vapor barrier) is ideal for adding to existing insulation in attics, ceilings, basements, and floors. Key Features: Unfaced Design: No vapor barrier, making it suitable for layering over existing insulation where permitted. Energy & Comfort Performance: R 30

R-30 Unfaced Fiberglass Batt Insulation (19" x 48")

JM R-30 unfaced fiberglass batt insulation helps reduce heat loss and improve sound control in wood-framed spaces. The unfaced design (no vapor barrier) is ideal for adding to existing insulation in attics, ceilings, basements, and floors.

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Key Features:

• Unfaced Design: No vapor barrier, making it suitable for layering over existing insulation where permitted.
• Energy & Comfort Performance: R-30 thermal resistance helps improve home energy efficiency and indoor comfort.
• Sound Dampening: Helps reduce unwanted noise transmission between spaces.
• Simple Fit Installation: Pre-cut 4-ft batts designed to press-fit between joists without specialized tools.
• Durable, Noncorrosive Material: Resists rot and mildew and won’t corrode pipes, wiring, or metal components.

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Specifications Table:

Specification	Details
R-Value	R-30
Insulation type	Fiberglass batt
Faced/Unfaced	Unfaced
Coverage area	69.66 sq ft
Batt width	19 in
Batt length	48 in
Thickness	10.25 in
R-value per inch	2.9268
Stud/joist spacing	19 in
Framing type	Wood 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 attics	Yes
For use in ceilings	Yes
For use in basements	Yes
For use in floors	Yes
For use in crawlspaces	No
For use in walls	No
Warranty	1-year limited
Package weight	27.03 lb
Package count	11
Total package quantity	44
Multi-pack quantity	4
Package type	Multi-pack
Bag dimensions (L x W x D)	20 x 20 x 50
UNSPSC	11162400
CA Residents: Prop 65 Warning(s)	No

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Frequently Asked Questions (FAQ):

Q: Where can I use this insulation?
A: It’s intended for wood-framed areas such as attics, ceilings, basements, floors, and some below-grade applications as specified on the product listing.

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Q: What does “unfaced” mean?
A: Unfaced batts have no built-in vapor retarder (vapor barrier), which can make them suitable for adding over existing insulation where appropriate.

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Q: Do I need tools to install fiberglass batts?
A: Typically you can press-fit batts between framing members; a utility knife and protective gear (gloves/eyewear) are commonly used.

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Q: Will this insulation help with noise?
A: Yes—this fiberglass batt insulation is marketed to provide sound control in addition to thermal performance.

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Q: Does it include a vapor retarder?
A: No—this product is listed as unfaced and the vapor retardant is listed as “No.”

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Quiet, cocooning comfort—hidden luxury for the home

Think of this R-30 unfaced fiberglass batt as the invisible couture lining of your home—softening temperature swings while dialing down ambient noise. Its clean, unfaced profile layers beautifully into existing assemblies, letting performance lead without adding visual clutter. Use it to elevate attics and overhead planes into calm, comfortable buffers that make the rooms below feel more intentional. It’s the kind of behind-the-walls refinement that defines truly luxurious living.

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Upgrade comfort and cut energy loss—add JM R-30 unfaced fiberglass batts to your next attic or ceiling insulation project.