R-15 Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt 15in. x 47in. (24-Bags)
- R-15 Mineral wool batt can be installed within exterior 2x4 wall
- Easy to cut and install, even around construction irregularities
- Fire resistant, mold resistant and non-corrosive
- See More Details
Frequently Bought Together
Product Overview
Moisture Control
Remains mold resistant by creating an insulation moisture barrier within the wall cavity.
Fire Resistance
Non-combustible insulation resists fire and temperatures in excess of 2000°F, giving you more time to get out in the event of a fire.
Sound Insulation
Designed with outstanding acoustic insulation to help deaden noise, provide sound insulation in walls and reduce sound from traveling room-to-room.
What Is R-Value?
The R-value for insulation measures how well insulation materials can resist heat - the higher the R-value, the greater the insulation performance.
Insulation Supplies
Thermafiber can be installed easily and requires minimal equipment.
Ease Of Installation
Flexible insulation is easy to cut and install, allowing it to conform to building shapes and construction irregularities.
Brand You Can Trust
Thermafiber is the #1 specified brand* of mineral wool.
R-Value Insulation Map
Find your zone on the insulation map.
R-Value Insulation Chart
Now use the R-value table to determine the recommended R-value you need.
Insulation Calculator
The insulation estimator helps you determine how much insulation is needed to cover the total square footage of your attic, floor and walls.
Energy Savings
Thermafiber insulation reduces the transfer of heat and cold through building structures to provide thermal comfort and continuous energy saving insulation.
Make More Possible
Owens Corning is a global leader in engineered materials for roofing, insulation and composites.
Smarter Through Science
Our innovative solutions are safe, sustainable, durable, efficient and affordable to address thermal, air, fire and moisture performance.
- Dimensions:3.92 ft. x 3.5 in. x 15 in., 6 pieces (29.4 sq. ft. / bag)
- 24 bags/pallet = 144 pieces/705.6 sq. ft.
- Mold resistant
- Provides fire resistance
- Unfaced Insulation: does not have a vapor retarder
- Flexible Insulation is easy to cut and install, allowing it to conform to building shapes and construction irregularities
- 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
- Shop all Owens Corning Thermafiber Mineral Wool Insulation here
- California residents
Product Overview
- R-15 Mineral wool batt can be installed within exterior 2x4 wall
- Easy to cut and install, even around construction irregularities
- Fire resistant, mold resistant and non-corrosive
Compare Similar Mineral Wool Insulation
| |  |  | |
| Brand | Owens Corning | Owens Corning | Owens Corning | Owens Corning |
| Name | R-15 Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt 15in. x 47in. (24-Bags) | Thermafiber Fire and Sound Guard Unfaced Mineral Wool Insulation Batt 15 in. x 47 in. (24-Bags) | R-30 15 in. x 47 in. Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt (24-Bags) | R-23 Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt 15in. x 47in. (24-Bags) |
| Price | $86533 | $102063 | $116392 | $119900 |
| Ratings | (3) | (1) | (1) | (37) |
| Insulation Location | 2x4 Wall,2x4 Wall,2x4 Wall,Ceiling Insulation,Ceiling Insulation,Ceiling Insulation,Floor,Floor,Floor | 2x4 Wall,2x4 Wall,2x4 Wall,2x4 Wall | Ceiling Insulation,Ceiling Insulation,Ceiling Insulation,Floor,Floor,Floor | 2x6 Wall,2x6 Wall,2x6 Wall |
| Product Thickness (in.) | 3.5 in | 3 in | 7.125 in | 5.5 in |
| Insulation Features | Fire Block Rated,Fire Block Rated,Fire Block Rated,Friction Fit,Friction Fit,Friction Fit,Soundproofing Insulation,Soundproofing Insulation,Soundproofing Insulation | Fire Block Rated,Fire Block Rated,Fire Block Rated,Fire Block Rated | Fire Block Rated,Formaldehyde Free,Formaldehyde Free,Formaldehyde Free | Fire Block Rated,Fire Block Rated,Fire Block Rated |
| Insulation R-Value | R15 | R30 | R23 | |
| Number of Bags | 1 | 1 | 1 | 1 |
| Compatible Install Surface | Plywood,Plywood,Plywood,Wood,Wood,Wood | Plywood,Plywood,Plywood,Plywood | Plywood,Plywood,Plywood,Wood,Wood,Wood | Plywood,Plywood,Plywood |
| Roll or Batt | Batt | Batt | Batt | Batt |
| Faced or Unfaced | Unfaced | Unfaced | Unfaced | Unfaced |
| View Product | View Product | View Product | View Product |
Compare Similar Mineral Wool Insulation
| | | | |
| Brand | Owens Corning | Owens Corning | Owens Corning | Owens Corning |
| Name | R-15 Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt 15in. x 47in. (24-Bags) | Thermafiber Fire and Sound Guard Unfaced Mineral Wool Insulation Batt 15 in. x 47 in. (24-Bags) | R-30 15 in. x 47 in. Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt (24-Bags) | R-23 Thermafiber UltraBatt Unfaced Mineral Wool Insulation Batt 15in. x 47in. (24-Bags) |
| Price | $86533 | $102063 | $116392 | $119900 |
| Ratings | (3) | (1) | (1) | (37) |
| Insulation Location | ||||
| Product Thickness (in.) | ||||
| Insulation Features | ||||
| Insulation R-Value | ||||
| Number of Bags | ||||
| Compatible Install Surface | ||||
| Roll or Batt | ||||
| Faced or Unfaced | ||||
| View Product | View Product | View Product | View Product |
Key Features
Moisture Control
Remains mold resistant by creating an insulation moisture barrier within the wall cavity.
Fire Resistance
Non-combustible insulation resists fire and temperatures in excess of 2000°F, giving you more time to get out in the event of a fire.
Sound Insulation
Designed with outstanding acoustic insulation to help deaden noise, provide sound insulation in walls and reduce sound from traveling room-to-room.
What Is R-Value?
The R-value for insulation measures how well insulation materials can resist heat - the higher the R-value, the greater the insulation performance.
Insulation Supplies
Thermafiber can be installed easily and requires minimal equipment.
Ease Of Installation
Flexible insulation is easy to cut and install, allowing it to conform to building shapes and construction irregularities.
Brand You Can Trust
Thermafiber is the #1 specified brand* of mineral wool.
R-Value Insulation Map
Find your zone on the insulation map.
R-Value Insulation Chart
Now use the R-value table to determine the recommended R-value you need.
Insulation Calculator
The insulation estimator helps you determine how much insulation is needed to cover the total square footage of your attic, floor and walls.
Energy Savings
Thermafiber insulation reduces the transfer of heat and cold through building structures to provide thermal comfort and continuous energy saving insulation.
Make More Possible
Owens Corning is a global leader in engineered materials for roofing, insulation and composites.
Smarter Through Science
Our innovative solutions are safe, sustainable, durable, efficient and affordable to address thermal, air, fire and moisture performance.
Specifications
Dimensions
Details
Warranty / Certifications
Questions & Answers
Is this the same as rainbarrier 45?
Asked by Bob February 26, 2021Hello Bob, Thermafiber UltraBatt is not the same as the Thermafiber RainBarrier. The UltraBatt is intended to be used as a thermal and acoustical insulation on the interior side of the building. The Thermafiber RainBarrier is intended to be used as continuous insulation on the exterior side of the building. The RainBarrier has added silicon and is engineered and manufactured specifically for improved moisture resistance. Thank you for your inquiry!
Can you use this in 2x3 walls?
Asked by Matthew January 4, 2021Hello Matthew, R-15 UltraBatt is 3.5" thick, it may be difficult to compress the insulation into a 2.5" cavity. Also compressing the insulation will reduce the R-value of the product. Thank you for your inquiry!
Why does it cost more per bag ($36.05/each bag) for the pallet of 24 bags than it does for indivi...
Asked by Roger November 27, 2020Hello Roger, Please contact your local Home Depot for pricing information. Thank you for your inquiry!
can I use this on the outside of my sheathing?
Asked by KevinH October 30, 2020Hello KevinH, Thermafiber UltraBatt cannot be used on the exterior side of a wall, it needs to be protected from the elements. It can be used on the interior side of an exterior wall. Thank you for your inquiry!
Can i double up the r15 3.5 inch ultrabatt exterior rated and put in attic ceiling?
Asked by Tableauman October 22, 2020Hello Tableauman, As long as you have proper ventilation, the addition of more insulation to the attic floor is acceptable. If any batts are faced, they must be in contact with the drywall ceiling in the attic. We suggest looking at R-15 fiberglass as that will be a lighter batt that will be less likely to compress the bottom batt. Thank you for your inquiry!
is this formaldehyde-free?
Asked by jackobean October 15, 2020Hello jackobean, Thermafiber UltraBatt is manufactured with a binder that contains formaldehyde as an ingredient. During the manufacturing process, however, these products are cured at a very high temperature and virtually all of the binder formaldehyde is eliminated. The amount of formaldehyde in the finished product is less than 0.01% by weight. At this low level, and because we oven cure the product during manufacture, out-gassing of formaldehyde is extremely low and is not a significant source of formaldehyde when installed in a home or building. Thank you for your inquiry!
I have old blown insulation in my condo attic or crawl space, I want to remove it, and start off ...
Asked by Voni March 4, 2020Hello Voni - More information is needed in order to assist you. Please contact an Owens Corning representative at 1-800-GET-PINK for assistance with your project.
how many sq ft is each bag?
Asked by moses February 23, 2020Hello moses - There is 29.37 sq. ft. per bag. Thank you for your inquiry!
One bag of this is $24.64, so 24 bags should be about $590. Why are you charging $865 for these? ...
Asked by PJ October 30, 2019Hello PJ, Please contact a representative at your local Home Depot ProDesk or you can call 1-800-HOME-DEPOT for current pricing. Thank you for your inquiry!
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