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Internet #202090820

Model # RXCB351525

Store SKU #974419

ROCKWOOL R-15 ComfortBatt Fire Resistant Stone Wool Insulation Batt 15 in. x 47 in.
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ROCKWOOL

R-15 ComfortBatt Fire Resistant Stone Wool Insulation Batt 15 in. x 47 in.

  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
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Product Overview

  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
Roxul ComfortBatt R-15 Fire Resistant Thermal Home Insulation. Whether you are building new or renovating your home, use Roxul ComfortBatt Thermal Home Insulation in your exterior walls, attic, ceiling and floor frames for top thermal performance. With its high density, non-directional fiber structure and unique flexible edge, Roxul ComfortBatt is designed to deliver a better fit providing heating and cooling energy savings.
  • For 2 in. x 4 in. exterior wood frame walls at 16 in. on center, attics and crawl spaces
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Bag coverage: 59.7 sq. ft.
  • Completely fills wall cavity to eliminate gaps and voids
  • Friction fit batts conform to normal variations in stud centers caused by distortion or warping
  • Flexible edge springs back, expanding the batt against the frame studs to provide a complete fill
  • Made from natural rock
  • Greenguard gold certified for indoor air quality
  • Click here to learn more about Eco Options and Energy Efficiency
  • Installation Breakdown:

    basement wall R-15 installation breakdown

  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button
    "

Product Overview

  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
Model #: RXCB351525
Sku #: 974419
Internet #: 202090820

Roxul ComfortBatt R-15 Fire Resistant Thermal Home Insulation. Whether you are building new or renovating your home, use Roxul ComfortBatt Thermal Home Insulation in your exterior walls, attic, ceiling and floor frames for top thermal performance. With its high density, non-directional fiber structure and unique flexible edge, Roxul ComfortBatt is designed to deliver a better fit providing heating and cooling energy savings.

  • For 2 in. x 4 in. exterior wood frame walls at 16 in. on center, attics and crawl spaces
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Bag coverage: 59.7 sq. ft.
  • Completely fills wall cavity to eliminate gaps and voids
  • Friction fit batts conform to normal variations in stud centers caused by distortion or warping
  • Flexible edge springs back, expanding the batt against the frame studs to provide a complete fill
  • Made from natural rock
  • Greenguard gold certified for indoor air quality
  • Click here to learn more about Eco Options and Energy Efficiency
  • Installation Breakdown:

    basement wall R-15 installation breakdown

  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button
    "

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Info & Guides

Product Overview

  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
Roxul ComfortBatt R-15 Fire Resistant Thermal Home Insulation. Whether you are building new or renovating your home, use Roxul ComfortBatt Thermal Home Insulation in your exterior walls, attic, ceiling and floor frames for top thermal performance. With its high density, non-directional fiber structure and unique flexible edge, Roxul ComfortBatt is designed to deliver a better fit providing heating and cooling energy savings.
  • For 2 in. x 4 in. exterior wood frame walls at 16 in. on center, attics and crawl spaces
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Bag coverage: 59.7 sq. ft.
  • Completely fills wall cavity to eliminate gaps and voids
  • Friction fit batts conform to normal variations in stud centers caused by distortion or warping
  • Flexible edge springs back, expanding the batt against the frame studs to provide a complete fill
  • Made from natural rock
  • Greenguard gold certified for indoor air quality
  • Click here to learn more about Eco Options and Energy Efficiency
  • Installation Breakdown:

    basement wall R-15 installation breakdown

  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button
    "

Product Overview

  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
Model #: RXCB351525
Sku #: 974419
Internet #: 202090820

Roxul ComfortBatt R-15 Fire Resistant Thermal Home Insulation. Whether you are building new or renovating your home, use Roxul ComfortBatt Thermal Home Insulation in your exterior walls, attic, ceiling and floor frames for top thermal performance. With its high density, non-directional fiber structure and unique flexible edge, Roxul ComfortBatt is designed to deliver a better fit providing heating and cooling energy savings.

  • For 2 in. x 4 in. exterior wood frame walls at 16 in. on center, attics and crawl spaces
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Bag coverage: 59.7 sq. ft.
  • Completely fills wall cavity to eliminate gaps and voids
  • Friction fit batts conform to normal variations in stud centers caused by distortion or warping
  • Flexible edge springs back, expanding the batt against the frame studs to provide a complete fill
  • Made from natural rock
  • Greenguard gold certified for indoor air quality
  • Click here to learn more about Eco Options and Energy Efficiency
  • Installation Breakdown:

    basement wall R-15 installation breakdown

  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button
    "

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Info & Guides
Key Features

Key Features

Product Overview
Key Features
  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
Roxul ComfortBatt R-15 Fire Resistant Thermal Home Insulation. Whether you are building new or renovating your home, use Roxul ComfortBatt Thermal Home Insulation in your exterior walls, attic, ceiling and floor frames for top thermal performance. With its high density, non-directional fiber structure and unique flexible edge, Roxul ComfortBatt is designed to deliver a better fit providing heating and cooling energy savings.
  • For 2 in. x 4 in. exterior wood frame walls at 16 in. on center, attics and crawl spaces
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Bag coverage: 59.7 sq. ft.
  • Completely fills wall cavity to eliminate gaps and voids
  • Friction fit batts conform to normal variations in stud centers caused by distortion or warping
  • Flexible edge springs back, expanding the batt against the frame studs to provide a complete fill
  • Made from natural rock
  • Greenguard gold certified for indoor air quality
  • Click here to learn more about Eco Options and Energy Efficiency
  • Installation Breakdown:

    basement wall R-15 installation breakdown

  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button
    "

Product Overview

  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
Model #: RXCB351525
Sku #: 974419
Internet #: 202090820

Roxul ComfortBatt R-15 Fire Resistant Thermal Home Insulation. Whether you are building new or renovating your home, use Roxul ComfortBatt Thermal Home Insulation in your exterior walls, attic, ceiling and floor frames for top thermal performance. With its high density, non-directional fiber structure and unique flexible edge, Roxul ComfortBatt is designed to deliver a better fit providing heating and cooling energy savings.

  • For 2 in. x 4 in. exterior wood frame walls at 16 in. on center, attics and crawl spaces
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Bag coverage: 59.7 sq. ft.
  • Completely fills wall cavity to eliminate gaps and voids
  • Friction fit batts conform to normal variations in stud centers caused by distortion or warping
  • Flexible edge springs back, expanding the batt against the frame studs to provide a complete fill
  • Made from natural rock
  • Greenguard gold certified for indoor air quality
  • Click here to learn more about Eco Options and Energy Efficiency
  • Installation Breakdown:

    basement wall R-15 installation breakdown

  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button
    "

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Info & Guides

Specifications

Dimensions

Coverage Area (sq. ft.)
59.7
Product Length (ft.)
3.91 ft
Product Thickness (in.)
3.5 in
Product Width (in.)
47 in

Details

Bag Size
48 ft. x 16 in. x 24 in.
Batt/Roll Size
3.91 ft. x 3.5 in. x 47 in.
Compatible Install Surface
Wood
Coverage Area per Bag (sq. ft.)
59.73
Faced or Unfaced
Unfaced
Insulation Features
Friction Fit
Insulation Location
2x4 Wall,Attic,Basement,Ceiling,Crawlspace,Floor
Insulation R-Value
R15
Insulation Type
Mineral Wool Insulation
Number of Bags
12
Pieces Per Bag
12
Pieces per Pallet
144
Product Weight (lb.)
48.9lb
Returnable
90-Day
Roll or Batt
Batt

Warranty / Certifications

Warranty Information
No

Specifications

Dimensions

Coverage Area (sq. ft.)
59.7
Product Length (ft.)
3.91 ft
Product Thickness (in.)
3.5 in
Product Width (in.)
47 in

Details

Bag Size
48 ft. x 16 in. x 24 in.
Batt/Roll Size
3.91 ft. x 3.5 in. x 47 in.
Compatible Install Surface
Wood
Coverage Area per Bag (sq. ft.)
59.73
Faced or Unfaced
Unfaced
Insulation Features
Friction Fit
Insulation Location
2x4 Wall,Attic,Basement,Ceiling,Crawlspace,Floor
Insulation R-Value
R15
Insulation Type
Mineral Wool Insulation
Number of Bags
12
Pieces Per Bag
12
Pieces per Pallet
144
Product Weight (lb.)
48.9lb
Returnable
90-Day
Roll or Batt
Batt

Warranty / Certifications

Warranty Information
No

Questions & Answers

For basement finishing, im insulating block walls with foam board, then framing over it with roxul between stud voids,

then drywall. Is vapor barrier needed between drywall and roxul?
Asked by: JEM
NO....A vapor barrier is to prevent warm air from getting to a cold surface and condensing. That's it's main job ! Since you have foam insulation glued to your concrete walls, the air getting thru the Roxul will not see a surface cold enough to condense against. If you have foam board (properly sealed), when you install Roxul over that NO VAPOR BARRIER IS NEEDED.
Answered by: MN
Date published: 2019-03-28

Hi I am looking to replace old fiberglass insulation in my attic floor Would this be a good option vs traditional fiberglass?

Asked by: EK
You can use it in an attic, but I don't believe there is any real advantage to using this over other insulation types for an attic. One small advantage is that mice don't like it. The bales are large and heavy and might be hard to get up a typical attic hatch or stairway, although you could open the bale and take a few batts up at a time. Kind of a pain though. By far the most important thing to take care of if you are redoing the attic insulation is to do good air sealing. All cracks, joints and penetrations in the ceiling should be sealed with sealant or foam. Can lights should have insulated boxes built over them. Second most important thing is to ensure proper ventilation, with eave vents and ridge vents. If you take care of those items, then it almost doesn't matter what type of insulation you use as long as you use enough of it to get the recommended R-value for your area. I will say that working with Rockwool is less "itchy" than working with fiberglass.
Answered by: Carbidetipped
Date published: 2019-08-18

what product to use as vapor barrier?

I want to use the Roxul product in my garage attic. the garage ceiling has drywall and no existing insulation. I'm in Central Ohio and typically vapor barrier are required. None of the Roxul products seem to be Kraft faced as is typical with standard fiberglass insulation. So, any comments on vapor barrier between drywall and the Roxul Batts or would there be a vapor barrier that goes on top of the Batts and the batts are directly laying on the drywall ceiling?
Asked by: GLo
We use Membrain plastic sheeting by Certainteed as a vapor barrier on interior walls (more about unheated spaces like yours, below). We have used Membrain for more than a decade as it is easy to work with and comes in a roll. It has tiny pinholes that allow for a bit of breathing within the wall structure itself. For vertical walls, we set Roxul to the exterior side, then attach entire swaths of the sheeting (takes two people; otherwise, you get bunching and folds) to the interior side of the studs, then sheetrock over that. For a cathedral ceiling, we leave a one-inch space between the Roxul and the roof's plywood underlayment, and then install Roxul to R-40 or so, and then staple sheeting to the ceiling joists over that, then sheetrock. For ceilings with sheetrock already, and just a crawlspace or attic above, it is our understanding from various research that there should be no vapor barrier on top of the Roxul batts laid on top of the sheetrocked ceiling. Roxul batts are made of mineral wool and don't support moisture like, say, recycled jeans (shredded cotton) can. You can do some more research on your own, but my carpenter would tell you not to use any vapor barrier in your situation as he told us not to use it when we insulated our unheated, open-to-the-elements-but-covered-by-a-roof front-porch ceiling which shares a few feet of the interior foyer space. PS Have never seen Membrain sold at Home Depot stores nor on its website; we bought it from a local distributor.
Answered by: snug88
Date published: 2018-09-14

How big is the bag it comes in

Asked by: Den
The R-15 Rockwool ComfortBatt bag measures 48 inches long, by 15.5 inches wide by 27" thick (or 27 inches tall when you look at this photo). (The 27 inches runs perpendicular to the printing on the bag). We have found that the bag can be somewhat compressed to fit into a space with tighter dimensions during transport. We managed to fit three across, inside an '87 Volvo station wagon, setting just like you see them in this photo. We fit six on top of the roof rack, using long straps to secure to the rack ends. (Note: The weight temporarily dented the roof metal in the middle, but it popped back out on its own because Volvo metal is like tank metal. I would not recommend putting more than the number of pounds your car's or SUV's manual says can go onto a roof rack.) We have rented a 15-foot trailer to haul bags of ComfortBatts, but I think we could only fit 8 bags into that trailer. If you use a trailer, you have to secure them with a tarp and rope. When we carry them on top of our Volvo wagon, only the strapping is needed to hold them securely in place, no tarp.
Answered by: snug88
Date published: 2018-04-12
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Customer Reviews

ROCKWOOL R-15 ComfortBatt Fire Resistant Stone Wool Insulation Batt 15 in. x 47 in. is rated 4.8 out of 5 by 508.
Rated 1 out of 5 by from Terrible website- is ComftBatt product any better? Read many positive reviews about RW ComfortBatt insulation; so went to a lumber yard and bought some to try on an exterior wall wood studs insulation project. Foolish me, expecting a company in 2019, to have an easy to navigate website with some basic installation information. “Search here...” OK...let’s try: ‘Installing ComfortBatt’.... “Residential .... SellSheet” (nope). “Ratings....”(nope). “CavityRock....” (nope). “ComfortBatt ...Guidespec” (nope). “Commercial CavityRock (nope). “CavityRock .... for Exterior Walls”. (nope). “ComfortBatt ModularLifestyles....” (nope). “ComfortBatt Ext...Wall Wood...Installation” . (nope). Etc etc etc. Let’s try “Rockchat”..... (tried it.). Is “Rockchat” a joke? I hope it is. Let’s try: “Insulation Applications”. (nope) Let’s try: “”Learning”. (haha....nope.) Let’s try: “Technical Resources”. ....Wood Frame Construction” .... (nope). I wonder if any Rock Wool employee has tried to use their website.... I give up. ComfortBatts going back tomorrow. I thank my lucky stars for not unloading the batts from my vehicle.
Date published: 2019-10-07
Rated 4 out of 5 by from I prefer working with Roxul over fiberglass insulation. It's not quite as itchy as fiberglass, b... I prefer working with Roxul over fiberglass insulation. It's not quite as itchy as fiberglass, but it's not itch free either. I always wear a dust mask working with Roxul, because particles become airborne as you work it into place. It fits snugly in wall captivities where standard stud spacing was used, so it appears to provide better protection against air infiltration than fiberglass. For areas where the insulation needs to be cut, it cuts very easily with a bread knife. The only reason I gave it 4 stars instead of 5 is that cutting around electrical boxes and "grooving" for electrical wires is kind of a pain because the material is a bit "crumbly". I especially like the fact that Roxul is fire resistant. Also, I'm sure that people will tell me I'm misinformed, but I don't feel comfortable using foam insulation. I'd be concerned about foam's flammability and its potential for off-gassing. I don't have those concerns with Roxul.
Date published: 2016-10-27
Rated 5 out of 5 by from I am not going back to fiberglass. This stuff is awesome. Although more costly than fiberglass, this stuff is way better. Just the fire resistance alone should sell you on this product. It's no where near as itchy as fiberglass, the r-value is better than r-13, it holds it's shape way better, and the sound deadening properties are noticeable instantly. I cut it with my serrated bread knife from the kitchen, without ruining it at all, and it cuts better than bread! Cutting around outlet boxes is just too easy. My wife was intimidated at first, but when she saw how much easier to cut it was, she was actually having fun doing it! I also feel better about it's resistance to moisture, since no house is built completely air/water tight. This stuff will pay for itself anyway in the long run and I strongly recommend it. I ordered mine online and the store had it all loaded on a flat cart in no time at all. A+
Date published: 2012-05-15
Rated 5 out of 5 by from It is easy to work with and cuts to be fitted in the irregular voids in the construction. It cuts... It is easy to work with and cuts to be fitted in the irregular voids in the construction. It cuts like bread with the suggested cutting tool, "A serrated bread knife." RJP. P.S. Chris and CJ in the Lumber Department did a great job of delivering HomeDepot's customer service!
Date published: 2019-09-26
Rated 5 out of 5 by from Excellent product, works as directed. Would recommend to anyone who... Excellent product, works as directed. Would recommend to anyone who wants top quality insulation that will add R-Value and safety to your home. Definitely worth the extra money!
Date published: 2019-10-15
Rated 5 out of 5 by from Works very well, easy to install. I will definitely... Works very well, easy to install. I will definitely be recommending this to friends.
Date published: 2019-11-07
Rated 5 out of 5 by from The best product! I have replaced all of the old 1955 insulation in my home and i am working on the last room right now.I'm using R14 for 2 x 4 application inside my walls.I am so glad that i'm using Roxul as it has already shown to lower my heating bills and the accoustics changed right away.I don't hear much noise outside anymore.It is so easy to install and it's not itchy,i'm cutting the pieces with a bread knife.Thanks guys for a great product!
Date published: 2019-07-10
Rated 5 out of 5 by from NEVER BUY ANY OTHER BRAND AGAIN!! We use Roxul on every renovation product we do. Insulated a Garage in 95 degree heat, when the garage maintained a 72 degree temperature. It cuts cost on heating and cooling a house bc of the far superior insulation properties is has over other brands. It won't sag over time either like other brands, making your house envelope not sealed. Ever since mike holmes introduced it on his show, i was waiting for it to come to the United states. I would like for Roxul to be an industry standard in the building trade and put those "other" companies out of business lol.
Date published: 2017-11-25
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