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R-23 Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt 15in. x 47in. (24-Bags)

$146549
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  • R-23 Mineral wool batt can be installed within exterior 2x6 wall
  • Easy to cut and install, even around construction irregularities
  • Fire resistant, mold resistant and non-corrosive
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Product Overview

Thermafiber fire resistance icon

Fire Resistance

Non-combustible insulation resists fire and temperatures in excess of 2000F, giving you more time to get out in the event of a fire.

Thermafiber sound performance icon

Sound Insulation

Outstanding acoustic insulation designed to reduce noise and absorb sound traveling from room to room.

Thermafiber mold icon

Mold Resistant

Mineral Wool is made of an inorganic material that will not promote the growth of mold or retain moisture.

Supplies needed for Thermafiber project

Easy to Install

Thermafiber insulation is easy to install with minimal PPE required.

diagram of Thermafiber install

Measure and Cut

Thermafiber insulation is easy to cut with a serrated knife for custom fitting around electrical boxes, pipes, ductwork, wiring or between nonstandard studs and joists.

diagram of Thermafiber Install

Squeeze and Insert

Thermafiber insulation is flexible and pliable; simply squeeze the sides to compress the insulation and insert into the desired wall.

diagram of Thermafiber install

Release and Expand

Once in place, Thermafiber insulation naturally expands to fill in the space, creating a snug, custom fit.

Thermafiber recycled content icon

Recycled Content

Thermafiber Mineral Wool Insulation is composed of at least 70% recycled content which means you can help protect your home while protecting the environment.

Thermafiber product with logo

Benefits of Mineral Wool

Thermafiber Mineral Wool Insulation products are non-combustible, mold-resistant, non-corrosive and non-deteriorating. (ASTM C 1338)

Thermafiber Fire and Sound package

Thermafiber Fire and Sound Guard

Thermafiber Fire and Sound Guard insulation is designed to provide exceptional acoustical control and fire resistance.

House diagram for Thermafiber Fire and Sound

Where to Install

Thermafiber Fire and Sound Guard insulation is for use in interior walls, floors and ceilings.

Thermafiber UltraBatt Package

Thermafiber UltraBatt

Thermafiber UltraBatt insulation is a dense, semi-rigid batt designed to provide excellent thermal insulation, fire resistance and noise control.

House diagram for Thermafiber UltraBatt

Where to Install

Thermafiber UltraBatt insulation is for use in exterior walls, ceilings, cathedral ceilings, basement walls and crawlspaces.

Thermafiber UltraBatt mineral wool is designed to provide excellent thermal insulation in residential and light commercial building. The semi-rigid batts are more dense than traditional batts or rolls and are quick and easy to install. UltraBatt products are non-combustible, moisture-resistant, non-corrosive and mold resistant.
  • Unfaced Insulation: does not have a vapor retarder
  • Unfaced batt insulation is pre-cut for quick, easy installation
  • Mold resistant
  • Provides fire resistance
  • Thermafiber Insulation reduces the transfer of heat and cold through building structures to provide thermal comfort and continuous energy savings
  • Step 1 of installation: Measure and cut Insulation
  • Step 2 of installation: Squeeze and insert Insulation into desired space
  • Step 3 of installation: Release and let product expand within the wall
  • Shop all Owens Corning Thermafiber Mineral Wool Insulation here
  • California residents

Specifications

Dimensions

Cover Area Per Bag (sq. ft.)24.5 ft²Coverage Area (sq. ft.)24.5 ft²
Product Length (ft.)3.91 ftProduct Thickness (in.)5.5 in
Product Width (in.)15 in

Details

Bag Size3.91 ft. x 26 in. x 15 in.Batt/Roll Size3.91 ft. x 5.5 in. x 15 in.
Compatible Install SurfacePlywoodFaced or UnfacedUnfaced
Insulation FeaturesFire Block RatedInsulation Location2x6 Wall
Insulation R-ValueR23Insulation TypeBatt
Number of Pieces120Pack Size4
Product Weight (lb.)30 lbReturnable90-Day
Roll or BattBatt

Warranty / Certifications

Warranty Information3-Year Limited

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.5
    out of 57 reviews
  • 93%recommend this product
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Showing 1-10 of 57 reviews
It stays in place. No need for stapleing it to the lid. This product also gives me plenty of time...
It stays in place. No need for stapleing it to the lid. This product also gives me plenty of time and the option if I even want to drywall the lid because it stays between the beams so well.
by
  • Verified Purchase
  • Recommended
I used the Owens Corning insulation in a recording studio...
I used the Owens Corning insulation in a recording studio isolation booth. It was easy to work with and did an excellent job of making the room sound tight. The project was a success thanks to Owens Corning insulation
by
  • Verified Purchase
It is easy to install. It cuts well but dulls...
It is easy to install. It cuts well but dulls knives quickly. You need to treat it like fiberglass because it will cause itching for those sensitive.
by
  • Verified Purchase
The insulation did a excellent job of sound control seem...
The insulation did a excellent job of sound control seem to fall apart a lot more than other brands while installing
by
  • Verified Purchase
Great product
I'm using it in 2 x 6 ceiling joists 16" O.C. in an attic of an older home. It neatly fills the cavity; doesn't compress. For me, it fulfills my need.
by
  • Verified Purchase
It fit the studs perfectly!...
It fit the studs perfectly!
by
  • Verified Purchase
For the thickness I wish it had a better R...
For the thickness I wish it had a better R rating
by
Response from OwensCorningMay 16, 2022
Hello CeeDee, thank you for letting us know about your experience with our product. Please contact us at 1-800-GET-PINK so we can address your concerns. Thank you for your review!

Thank you!
Owens Corning
  • Verified Purchase
Home built around 1877, so insulation is very low. I...
Home built around 1877, so insulation is very low. I read all the reviews and loved the fire resistance, noise deading and of course the R factor. I have put it in and there are odd spots, which because you can cut it with a knife I can make smaller pieces, which fit snug. I noticed right away that the room was warmer, that room gets the blast of winter winds and summer sun. We'll see what summer brings.
by
  • Verified Purchase
Good quality, low airborn dust, good consistency through out....
Good quality, low airborn dust, good consistency through out.
by
    Good stuff, easy to install
    Transforming a garage into a woodshop. Too dang cold here in the winter, so adding insulation. Chose this to insulate the roof which is framed out with 2x6s. Going in like a charm. Stays in place without needing to be stapled in place or supported otherwise. Pretty dusty work, but none of the fiberglass itchies. Easy to trim to size with a bread knife. About 70% done so fsr an looking at the roof this morning I see frost where i have finished and wet where i still need to install, so it looks to be working well.
    by
    • Verified Purchase
    • Recommended
    1 found this review helpful
    Showing 1-10 of 57 reviews