At a Glance
R-Value per Inch: 4.2
Stud Spacing: 16 (in)
Sound BarrierROCKWOOL Comfortbatt R- 30.0 Attic Wall Unfaced Stone wool Batt Insulation 29.9-sq ft ( 15.25-in W x 47.0-in L)
Item #386579 |
Model #RXCB301525
Check Fee in Cart.
Flexible edge is designed to compress then expand into the stud cavity to maximize thermal performance
Easy and efficient installation, use a serrated knife to quickly cut around obstructions and penetrations
Friction fit into the stud cavity to ensure optimum performance, no sag over the years
Noncombustible, fire-resistant with a melting point above 1000 degrees Celcius
Water-resistant material repels water providing durability to unexpected exposure to moisture
Excellent sound absorbency with a high density fiber distribution
Made from one of the world’s most abundant raw materials - stone wool is user friendly
GREENGUARD Gold certified; chemically inert - CFC and HCFC free product and process
Inorganic, does not promote the growth of fungi, mold or mildew
General | |||
|---|---|---|---|
Series Name | Comfortbatt | Insulation Type | Stone wool |
Package Type | Individual pack | Package Count | 6 |
Total Package Quantity | 1 | Framing Type | Wood studs |
Dimensions | |||
|---|---|---|---|
Bag Dimensions (L x W x D) | 24 x 48 x 16 | Thickness (Inches) | 7.25 |
Coverage Area (Sq. Feet) | 29.9 | Width (Inches) | 15.25 |
Length (Inches) | 47 | R-Value per Inch | 4.2 |
Package Weight (lbs.) | 41.33 | Maximum R-Value | 30 |
Features | |||
|---|---|---|---|
Faced/Unfaced | Unfaced | Stud Spacing (Inches) | 16 |
Formaldehyde Free | No | Vapor Retardant | No |
Sound Barrier | Yes | ||
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | No | GREENGUARD Gold Certified | Yes |
ENERGY STAR Certified | Yes | ||
Warranty | |||
|---|---|---|---|
Warranty | None | ||
Compatibility | |||
|---|---|---|---|
For Use in Basements | Yes | For Use in Garage Doors | No |
For Use in Crawlspaces | Yes | For Use in Masonry | No |
For Use in Ceilings | Yes | For Use in Plumbing | No |
For Use in Attics | Yes | For Use in Vents | No |
For Use in Doors | No | For Use in Walls | Yes |
For Use in Duct | No | For Use in Windows | No |
For Use in Electrical | No | Fits 2 x 4 Walls | No |
For Use in Floors | Yes | Fits 2 x 6 Walls | No |
Miscellaneous | |||
|---|---|---|---|
UNSPSC | 11162400 | ||
Check out the Best Selling Batt Insulation on Lowes.com
Ratings may include incentivized customer reviews.
What Customers Are Saying
The insulation is widely praised for its high quality, ease of use, and superior insulation and sound-deadening properties compared to traditional options. Customers highlight its fire resistance, moisture resistance, and ability to prevent mold and pests. The insulation is described as simple to cut and install with minimal mess. It provides excellent thermal and acoustic performance, keeping homes warmer and quieter. Customers overwhelmingly recommend the product and state they will continue to use it.
Customer review summary generated by AI, including incentivized reviews.Insulation pickup
I really appreciate the team at Lowe's and helpful they were. Understanding and patient while I waited on the pickup car and they helped to make sure it was loaded properly. Thank you.
From Comfortbatt R- 30.0 Attic Wall Unfaced Stone wool Batt Insulation 29.9-sq ft ( 15.25-in W x 47.0-in L) Verified Purchaser
Premium Product
I purchased the R30 Rockwool. Expected delivery was 3-4 weeks, but actually arrived sooner than this. I managed to split the bats and acheived more coverage. Excellent soundproofing, insulator, and the material is pleasant to handle unlike fiberglass.
Good product
High quality alternative to fiberglass. Easy to cut, good thermal properties, and fire resistance
Verified Purchaser
Good stuff just remember PPE
Good stuff just remember PPE
Verified Purchaser
R-30 insulation
I dislike how you can only order 12 and are unable to order any other number of this product.
Verified Purchaser
Rockwool
Fantastic product. Price could be a little more affordable. But the product it self is very good.
Verified Purchaser
Wonderful stuff
Very effective insulation. Animals won’t dig into it. Safe and easy to work with.
Verified Purchaser
80 Questions
4
Answers
3
Answers
3
Answers
3
Answers
3
Answers
2
Answers
2
Answers
2
Answers
2
Answers
2
Answers