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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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Description
Johns Manville R-30 Unfaced Fiberglass Roll Insulation, 31.25-sq ft (15-in W x 25-ft L) – B390R 30 Unfaced Fiberglass Roll Insulation, 31. 25 sq ft R 30 unfaced fiberglass roll designed for wood framed attics and ceilings. Delivers high thermal performance with sound control, covering 31. 25 sq ft per roll at 15 in width and 25 ft length. Key Features: High R Value Performance: R 30 insulation improves energy efficiency in attics and ceilings Unfaced Fiberglass: Ideal for adding to existing insulation; wont rot or mildew Easy Fit for Joists:
R-30 Unfaced Fiberglass Roll Insulation, 31.25-sq ft
R-30 unfaced fiberglass roll designed for wood-framed attics and ceilings. Delivers high thermal performance with sound control, covering 31.25 sq ft per roll at 15 in width and 25 ft length.
Key Features:
- High R-Value Performance: R-30 insulation improves energy efficiency in attics and ceilings
- Unfaced Fiberglass: Ideal for adding to existing insulation; won’t rot or mildew
- Easy Fit for Joists: Sized for 16-in on-center wood stud spacing; press in place
- Health & Air Quality Certifications: Formaldehyde-free and GREENGUARD Gold Certified
- Durable Construction: Noncorrosive to pipes, wiring, and metal studs
Specifications Table:
| Specification | Details |
|---|---|
| Coverage Area (Sq. Feet) | 31.25 |
| Length (Feet) | 25 |
| Width (Inches) | 15 |
| Thickness (Inches) | 10.25 |
| Faced/Unfaced | Unfaced |
| Insulation Type | Fiberglass |
| Maximum R-Value | 30 |
| R-Value per Inch | 2.9268 |
| Framing Type | Wood studs |
| Stud Spacing (Inches) | 16 |
| For Use in Attics | Yes |
| For Use in Ceilings | Yes |
| For Use in Walls | No |
| For Use in Basements | No |
| For Use in Floors | No |
| For Use in Crawlspaces | No |
| 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 |
| Formaldehyde Free | Yes |
| Reflective | No |
| Sound Barrier | Yes |
| Vapor Retardant | No |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| Package Type | Individual pack |
| Package Count | 1 |
| Total Package Quantity | 1 |
| Warranty | 1-year limited |
| Bag Dimensions (L x W x D) | 15 x 15 x 22 |
| UNSPSC | 30141500 |
Frequently Asked Questions (FAQ):
Q: Can this be used in walls or basements?
A: No—this unfaced roll is intended for attics and ceilings and is not rated for walls or basements.
Q: What joist spacing does it fit?
A: Designed for 16-inch on-center wood studs.
Q: Is a vapor barrier included?
A: No, it is unfaced and not a vapor retardant.
Q: How much area does one roll cover?
A: 31.25 square feet per roll (15 in W x 25 ft L).
Q: Is it certified for indoor air quality?
A: Yes, it is formaldehyde-free and GREENGUARD Gold Certified.
Quiet comfort with clean, modern performance
This R-30 roll cocoons the attic in a soft, cloudlike layer that hushes ambient noise and stabilizes temperatures. Its unfaced profile slips seamlessly between joists, keeping the architecture clean and unobtrusive. Pair it with crisp white ventilation covers and matte black hardware for a refined, utility-chic look. A smart, luxurious foundation for homes that value comfort and efficiency.
Upgrade your attic with R-30 performance today and start saving on energy bills season after season.
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