Johns Manville R-30 Unfaced Fiberglass Batt Insulation, 56.83-sq ft Coverage (15.5-in W x 48-in L) – U1323S
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.
Original: $84.67
-70%$84.67
$25.40Product Information
Product Information
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Description
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.
