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Description
Johns Manville R-30 Unfaced Fiberglass Batt Insulation, 56.83-sq ft Coverage (15.5-in W x 48-in L) – U1323SR 30 Unfaced Fiberglass Batt Insulation, 56. 83 sq ft Johns Manville R 30 unfaced fiberglass batts deliver high thermal performance for attics and ceilings with standard 16 in on center framing. Pre cut 48 in lengths press in place for fast installation, improving energy efficiency and sound control without a vapor barrier. Key Features: High R Value Performance: R 30 fiberglass batts help reduce energy costs and improve comfort Ready to Install Size:
R-30 Unfaced Fiberglass Batt Insulation, 56.83-sq ft
Johns Manville R-30 unfaced fiberglass batts deliver high thermal performance for attics and ceilings with standard 16-in on-center framing. Pre-cut 48-in lengths press in place for fast installation, improving energy efficiency and sound control without a vapor barrier.
Key Features:
- High R-Value Performance: R-30 fiberglass batts help reduce energy costs and improve comfort
- Ready-to-Install Size: Pre-cut 15.5-in x 48-in batts fit 16-in OC framing; press-in-place install
- Unfaced Design: No vapor barrier—ideal for adding over existing insulation
- Health & Safety Certifications: Formaldehyde-free, GREENGUARD Gold and SCS certified
- Durable Composition: Will not rot or corrode pipes, wiring, or metal studs
Specifications Table:
| Specification | Details |
|---|---|
| Coverage Area | 56.83 sq ft |
| Batt Dimensions | 15.5 in W x 48 in L |
| Thickness | 8.25 in |
| Faced/Unfaced | Unfaced |
| Insulation Type | Fiberglass |
| R-Value | R-30 |
| R-Value per Inch | 2.9268 |
| Stud Spacing | 16 in OC |
| For Use in Attics | Yes |
| For Use in Ceilings | Yes |
| For Use in Floors | Yes |
| For Use in Walls | No |
| Formaldehyde Free | Yes |
| Framing Type | Wood studs |
| Vapor Retardant | No |
| GREENGUARD Gold Certified | Yes |
| ENERGY STAR Certified | Yes (program partner) |
| Package Type | Multi-pack |
| Package Count | 11 |
| Total Package Quantity | 11 |
| Bag Dimensions (L x W x D) | 16 x 20 x 50 in |
| Package Weight | 31.03 lb |
| Sound Barrier | Yes |
| Fits 2 x 4 Walls | No |
| Fits 2 x 6 Walls | No |
| CA Prop 65 Warning | No |
| Warranty | 1-year limited |
| UNSPSC | 11162400 |
Frequently Asked Questions (FAQ):
Q: How much area does one package cover?
A: Each package covers 56.83 square feet.
Q: Where can these batts be used?
A: They are designed for attics and ceilings and can also be used in floors with 16-in on-center framing; not for walls or masonry.
Q: Do these batts include a vapor barrier?
A: No. They are unfaced, so there is no vapor retarder and they can be added over existing insulation.
Q: What are the dimensions and thickness?
A: Each batt measures 15.5 in W x 48 in L with an 8.25-in thickness.
Q: Are there any certifications?
A: Yes—ENERGY STAR partner product; GREENGUARD Gold and SCS recycled content certified; formaldehyde-free.
Cocoon Your Home in Quiet, Efficient Comfort
This R-30 fiberglass batt nestles into your attic bays with a crisp, tailored fit, instantly softening acoustics and stabilizing temperature. I love its clean, unfaced profile—streamlined and versatile for layering over existing insulation. Pair it with matte-black attic hardware and tidy wire management for a polished, thoughtful upgrade. It’s a discreet essential that elevates everyday living with luxe comfort and efficiency.
Upgrade your attic with JM R-30 batts today for a quieter, more energy-efficient home.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy