Model # RXSS31525

Internet #202531875

Store SKU #982937

Roxul Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)
0774783027010

Roxul

Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)

  • Reduces Sound Tranmissions
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
$41.64 / roll
If you buy 15 or more
$29.15 / roll

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Product Overview

Safe'n' Sound Application Ceiling Between Two Floors
Safe'n'Sound Application Interior Wall
Does your Attic Insulation Measure Up? Visual to determine your attic insulation

Installing Roxul Safe 'n' Sound insulation inside interior walls, above ceilings is a great way to improve the fire resistance of your home and reduce unwanted noise between rooms. Made from non-combustible stone wool, Roxul Safe 'n' Sound can withstand intense temperatures of up to 2150 Degree F and delays the spread of fire for added safety. Designed with a unique, non-directional high density fiber structure, Roxul Safe 'n' Sound provides a better fit against the studs and an excellent barrier to sound. It is also easy to handle and cut with serrated knife for simple installation around doors, wiring and plumbing. And the combination of its natural composition of basalt rock with recycled content along with its Greenguard gold indoor air quality certification, Roxul Safe 'n' Sound offers you an environmentally friendly choice to help soundproof your next home renovation project.

  • Applications include: Basement walls and ceilings, media rooms, home offices, laundry rooms, furnace rooms and bedrooms
  • Roxul is non-combustible and delays the spread of fire between rooms for added safety
  • Easy to cut with a serrated knife to fit around doors, electrical and plumbing
  • Bag covers 59.7 sq. ft.
  • Resistant to water, rot, mold, mildew and bacterial growth
  • Made from natural rock
  • Greenguard gold certified for indoor air quality

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Customer Questions & Answers

Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)
Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)

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3 answers

Use for firestopping

This question is from Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)
Asked by
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March 29, 2016
I'm not putting this in a stud cavity. Rather, I have a 2" wide gap in a concrete wall, and I'm looking to stuff some mineral wool insulation in the gap as a firestop. Should I get the 3" safe 'n' sound, and squeeze it into place? Or should I get a 2" thick Roxul AFB, which will be barely compressed?

I realize the product may not be tested for this assembly or application. Repairing the wall is not a practical option, due to the configuration.
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Answers (3)

Asked by
Massachusetts
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Home Improvement Profile: Professional
May 9, 2016
Answer: 
Dear HaveSomeExtra: Yes, Roxul is an effective firestop for residential construction. It is much denser than fiberglass. We often use it to firestop the gap at the top of basement walls, and to create a horizontal firestop along basement walls. I would stuff the gap tightly with regular Roxul vs ComfortBoard or AFB; packing the space will provide a much better air seal, which is essential for a Read More
Dear HaveSomeExtra: Yes, Roxul is an effective firestop for residential construction. It is much denser than fiberglass. We often use it to firestop the gap at the top of basement walls, and to create a horizontal firestop along basement walls. I would stuff the gap tightly with regular Roxul vs ComfortBoard or AFB; packing the space will provide a much better air seal, which is essential for a firestop.
If you are working on a commercial building, the rock wool must also be covered by an approved firestop sealant. Check with your building inspector.
I hope this is helpful.
Mark Read Less
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Asked by
Massachusetts
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Home Improvement Profile: Professional
April 8, 2016
Answer: 
Dear Curious: We used Roxul Safe 'n Sound for a similar application on a recent project, to firestop the gap between the top of stud walls in a basement and insulate the ledger pockets. It works great. Roxul is much denser than fiberglass, molds kind of like clay and stays where you put it.
Roxul is not a vapor barrier, of course, so you would also need to seal the gap in your wall if that is an Read More
Dear Curious: We used Roxul Safe 'n Sound for a similar application on a recent project, to firestop the gap between the top of stud walls in a basement and insulate the ledger pockets. It works great. Roxul is much denser than fiberglass, molds kind of like clay and stays where you put it.
Roxul is not a vapor barrier, of course, so you would also need to seal the gap in your wall if that is an issue.
I hope this is helpful.
Mark Read Less
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March 31, 2016
Answer: 
Good morning,
You may use the 3" SAFE'n'SOUND for the application that you have described.
thank you.
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3 answers

What can it be held up with in a basement where a suspended ceiling is being used?

This question is from Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)
Asked by
PA
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October 26, 2015
I have a suspended ceiling in my basement and I need to noise proof the area below my bedroom.
How is this being held in place?
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Asked by
Hartford CT
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Home Improvement Profile: Professional
January 2, 2016
Answer: 
Yes Carol above the drop ceiling there are Joist. Measure the depth depending on the age they are probably 2 x 8 or 10 or they could be I joist which will look like they were made out of plywood. Anyway if you buy the correct insulation according to your joist there are several ways of securing in place. But in short YES a drop ceiling is not a problem.
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Asked by
Massachusetts
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Home Improvement Profile: DIYer
November 14, 2015
Answer: 
Dear Carol:
Sound absorption is one of the key benefits of Roxul, in addition to insulation value and fire resistance. It is much denser than fiberglass and has a Sound Transmission Class (STC) rating of 47 over a standard ceiling -- which will probably be higher with a drop ceiling. Here is a table that puts STC ratings in perspective:
STC What can be heard
25 Normal speech can be understood quite
Read More
Dear Carol:
Sound absorption is one of the key benefits of Roxul, in addition to insulation value and fire resistance. It is much denser than fiberglass and has a Sound Transmission Class (STC) rating of 47 over a standard ceiling -- which will probably be higher with a drop ceiling. Here is a table that puts STC ratings in perspective:
STC What can be heard
25 Normal speech can be understood quite easily and distinctly through wall
30 Loud speech can be understood fairly well, normal speech heard but not understood
35 Loud speech audible but not intelligible
40 Onset of "privacy"
42 Loud speech audible as a murmur
45 Loud speech not audible; 90% of statistical population not annoyed
50 Very loud sounds such as musical instruments or a stereo can be faintly heard; 99% of population not annoyed.
60+ Superior soundproofing; most sounds inaudible
One caveat: For each 2' x 4' ceiling panel, 3" of Roxul will weigh roughly 5 pounds. You will need to make sure your suspended ceiling can support this additional weight. You may need to add more supporting wires to the frame, for example.
I hope this is helpful.
Mark Read Less
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October 27, 2015
Answer: 
ROXUL SAFE n SOUND is recommended as a friction fit product between studs/joists 16" or 24" on centre dimensions. The product is oversized and this is what gives the friction fit in wall studs or ceiling joists. We do not have a tested assembly for a Dropped/Suspended Ceiling application.
If the ceiling is suspended 3” or greater from the joists, one option may be to place the batts directly on your
Read More
ROXUL SAFE n SOUND is recommended as a friction fit product between studs/joists 16" or 24" on centre dimensions. The product is oversized and this is what gives the friction fit in wall studs or ceiling joists. We do not have a tested assembly for a Dropped/Suspended Ceiling application.
If the ceiling is suspended 3” or greater from the joists, one option may be to place the batts directly on your dropped ceiling grid, if it can take the weight of the product. This will help reduce the sound transmission.
If you do not have this great of space between the joists and the ceiling, the product needs to be placed between the joists if you have access. Place in the joists so the insulation is flush with the bottom of the joist.
For further information please contact us at the following email address: contactus@roxul.com
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3 answers

Can this fit between a 2x3 studwall?

This question is from Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)
Asked by
New York, NY
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September 18, 2015
My basement has a 2x3 studwall (16" on center) around the perimeter walls (with polyiso foam board sandwiched between the studwall and the concrete wall. Will this be able to fit within the 2x3 studs? Or impossible to compress a little?
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Asked by
TX
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December 21, 2015
Answer: 
Just notice that Sate N Sound is advertised as 3", so you might be able to get it into a 2-1/2 actual stud or could easily add the 1/2" strip to make it a full 3".
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Asked by
TX
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Home Improvement Profile: DIYer
December 21, 2015
Answer: 
If your studs are actual 3", then you could nail a 1/2" strip on them. If it is 2-1/2" you could add 1". There may be reasons you don't want to do this I don't know about. If it's just space, you won't really miss that 1" lost.
Having tried once to jam fiberglass into the wrong stud size wall, it's not a good idea. You might be able to get away with 1/2" but I would imagine Roxul would not like to be Read More
If your studs are actual 3", then you could nail a 1/2" strip on them. If it is 2-1/2" you could add 1". There may be reasons you don't want to do this I don't know about. If it's just space, you won't really miss that 1" lost.
Having tried once to jam fiberglass into the wrong stud size wall, it's not a good idea. You might be able to get away with 1/2" but I would imagine Roxul would not like to be compressed 1" extra. Your drywall will have to be pushed against the studs by a helper. Odds are you will pop screws through 1/2" DW. That's what happened to me. Also, the DW bulges out between studs. After a couple sheets, we gave up, ripped it out, and got the correct size of fiberglass. Read Less
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September 21, 2015
Answer: 
ROXUL does not recommend compressing the face of the material as this will detrimentally affect the properties. Another factor to consider is the material is dense, which will spring back out if compressed, so if finishing with a drywall layer it may put undue pressure on the drywall and pop the drywall screws. You may want to consider using ROXUL AFB" as another option which is available in half inch Read More
ROXUL does not recommend compressing the face of the material as this will detrimentally affect the properties. Another factor to consider is the material is dense, which will spring back out if compressed, so if finishing with a drywall layer it may put undue pressure on the drywall and pop the drywall screws. You may want to consider using ROXUL AFB" as another option which is available in half inch increments from 1" through to 4" thickness. The batt is sized for steel stud dimensions, so 1" wider and longer than the wood stud material. You could get a 2 1/2" thickness material and then trim the width to fit wood stud dimension. Measure the physical space and trim material 3/4" wider to ensure a friction fit between studs. Read Less
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2 answers

NRC rating for Safe n Sound (model # RXSS31525)?

This question is from Safe 'n' Sound 3 in. x 15-1/4 in. x 47 in. Soundproofing Stone Wool Insulation (12-Roll)
Asked by
ma
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October 7, 2016
I saw the R value in Q&A, would like NRC rating for comparative purposes.
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Asked by
Massachusetts
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October 8, 2016
Answer: 
Dear William: Roxul's literature for Safe 'n Sounds states that a standard 2x4 wall filled with Safe 'n Sound has a Sound Transmission Class (STC) rating of 45. In a standard floor with 2x10 joists, the STC rating is 50. Here are the frequency and NRC ratings:
ASTM C423: CO-EFFICIENTS AT FREQUENCIES
Thickness: 3"
125 Hz 0.52
250 Hz 0.96
500 Hz 1.18
1000 Hz 1.07
2000 Hz 1.05
4000 Hz 1.05
NRC
Read More
Dear William: Roxul's literature for Safe 'n Sounds states that a standard 2x4 wall filled with Safe 'n Sound has a Sound Transmission Class (STC) rating of 45. In a standard floor with 2x10 joists, the STC rating is 50. Here are the frequency and NRC ratings:
ASTM C423: CO-EFFICIENTS AT FREQUENCIES
Thickness: 3"
125 Hz 0.52
250 Hz 0.96
500 Hz 1.18
1000 Hz 1.07
2000 Hz 1.05
4000 Hz 1.05
NRC 1.05

Please see additional literature available on the Roxul website. Installation is a key factor; air gaps create paths for sound and can sharply reduce effectiveness. Another tip: install a second layer of drywall over the first, and glue (not screw) the panels together with DAP 230 sealant. Use 2 full tubes on each panel. This creates a flexible link between the drywall sheets that attenuates sound. Also seal all of the edges, joints and openings with DAP 230.

I hope this is helpful,

Mark
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October 7, 2016
Answer: 
The NRC rating on the product is listed on the technical datasheet at the following link:
http://www.roxul.com/files/RX-NA_EN/pdf/Technical%20Data%20Sheets-%20updated/Residential/SAFEnSOUND_TECHDATASHEET_EN.pdf
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Customer Reviews

Rated 4.7 out of 5 by 317 reviewers.
Rated 4.0 out of 5.0 by Good but not consistent Just installed 24 rolls. If you need a lot its cheaper to order the per roll than pallet. Recommend safety glasses especially if space is above head height, gloves and long sleeves would help to prevent itching from all the tiny scratches you get from the sharp edges in the dust which doesnt float around. The batts needs to be more consistent the density ranges from soft cotton to packed cotton candy. The softer ones fall apart if adjusted too much. The denser ones feel better and last longer if it needs to be adjusted. When cutting for wires and pipes dont mess with the batt too much or it falls apart we did like in the videos and theres gaps at the bottom between the wires and wallswalls we filled some of the gaps with leftovers and tried notching. Anything bigger than standard wire suggest using notch method. For standard wires i cut some batts just under the wire and put the remaining on top of the wire, others i cut then split the batt, for tight areas i removed the split part and slid it behind the wire and covered it with the rest. Some of our studs were oversized and we cut and stacked the batts to fit. Just doing interior walls with nothing on exterior walls greatly reduced the echo and higher noises when walking on the sub floor. September 26, 2016
Rated 4.0 out of 5.0 by Good complement to sound proofing effort Roxul is a good sound proofing solution, doing better at some frequencies than standard fiberglass. However, at ~$0.70/ft^2 is is almost double the cost of comparable fiberglass. For most people, stick with fiberglass...but if you're willing to spend extra money to get a slightly marginal overall soundproofing solution, this is a good choice. MY SOLUTION: In 2x10 joist cavity: 5.5" dense fiberglass and 3" Roxul layer. Ceiling: RC-1, double layer 5/8" drywall with green glue 3 tubes/sht. Wall cavity: 1 or 2 layers of 3" Roxul for primary sound walls. Sound walls: RC-1 channel with double layer 5/8" drywall and green glue. March 12, 2015
Rated 4.0 out of 5.0 by A step up from fiberglass Definitely better than basic fiberglass insulation for ease of installation and offers better sound absorption. It is somewhat loose compared to Roxul's 4" acoustic insulation, and doesn't have quite as good acoustical properties as the more rigid stuff. I hear some sound guys think they found a cheaper substitute with this stuff, but realize you're giving up some absorption across the whole audible frequency spectrum with this stuff, but definitely a step up from basic fiberglass insulation. Recommend using the Insul-Knife and associated sharpner for these mineral fiber batts. March 2, 2015
Rated 5.0 out of 5.0 by Great Purchase! Classic example of me buying something because of solid reviews, and I couldn't be happier. We're working on a 525sqft addition. I wanted some kind of sound dampening between interior rooms. Since we're trying to keep the project inexpensive, I was planning to just slap in some standard pink R-13. After seeing the great reviews here, I decided to spend an extra couple hundred dollars to upgrade to this. Generally, my husband does all the work. Since this Roxul was my decision, he told me to come and install it last night (he was slightly skeptical at the extra expense and still cranky with me about it). I'm a wife in my 30's with absolutely zero construction experience. I installed 3 packages of this in an hour or two last night. I also helped with the exterior wall pink insulation, and I thought this stuff was itchier, but not terrible. Anyway, it fit perfectly between the studs, just press it in. I literally even installed it in some bare, undrywalled on either side walls, and it stayed in just great and husband came in after me and installed the drywall. We were both very surprised at the sound deadening. We can literally tell the difference when we walk into an area of the addition where this is installed. You can hear the change in your ears (more silent!), wish I could describe it. It seems to suck up footsteps, voices, anything. Even my husband was impressed enough to completely forgive the extra expenditure. I was debating not installing this on the smaller interior closets and other unimportant areas, but now I'm sold on this stuff and will install it on every single interior wall. Tip: I had a couple of really skinny/narrow spaces in my walls, near doorways, etc. I was able to cram in the scrap pieces that I'd cut out from outlets/switches. It crammed in there really well and stayed put easily, plus a great use of the scrap. Saved me from cutting out a 4-inch strip from a fresh piece. February 2, 2015
Rated 5.0 out of 5.0 by Never going back to fiberglass! I've owned my home for 6+ years now. After doing some remodeling and running wires in the attic I've found the entire house was insulated in 1969 with pink fiberglass insulation. I wouldn't wish working with fiberglass insulation on my worst enemy! It is nasty, itchy and just dirty. I had done some research and came across Roxul. Since I was insulating the interior walls of a basement bathroom at the time I thought I would give this stuff a try. I needed to insulate not only the walls but also the ceiling and around water pipes which you could hear running above the old drop ceiling. I certainly was not disappointed with this product. Easy to cut, hang and hardly any dirt! Not to mention the sound proofing was great.. After all this is the reason I purchased it. There is also no stapling this insulation as it fits securely between the studs. You get what you pay for. Roxul may be a bit more expensive then the typical fiberglass but it's well worth the price. December 3, 2013
Rated 5.0 out of 5.0 by Sound, absorbed perfectly. Roxul SnS (safe n sound) is the perfect solution to taming problem areas in recording studios, media rooms, and for general sound absorption as well. What makes it better than most? It absorbs sound evenly, meaning you won't create more problems by soaking up some frequencies more than others, you just get nice, even absorption across the board. The thicker you make it, the more it absorbs as well, and it's very popular for use in corner bass traps where they stack triangles into the corners. Overall, I'm blown away at the effectiveness of this product, whether installed as insulation or framed and hung as wall mounted acoustic panels. I even used this for an acoustic "cloud panel" with amazing results. Amazeballs. December 9, 2015
Rated 5.0 out of 5.0 by Safe N Sound is Awesome! My boyfriend and I were remodeling the attic space in our 1950s home. The old insulation was gross and we were finishing the attic to be more useful. We loved the quality of Roxul as we had used the safe and sound previously. Knowing we needed a higher R rating, we chose ComfortBatt as our preferred insulation. It is SO MUCH EASIER and less messy than the pink rolled stuff! We knew we had to make a lot of cuts, since our joists were not 16 on center, and the serrated bread knife is the perfect tool. Would totally recommend this to anyone, do not waste your money on another product. [This review was collected as part of a promotion.] October 28, 2016
Rated 5.0 out of 5.0 by Safe N' Sound is the way to go for Sound Proofing! My boyfriend and I were remodeling the attic space in our 1950s home. The old insulation was gross and we were finishing the attic to be more useful. We did a TON of research to find something that could be used as sound proofing and we had no idea about Roxul. After watching many videos, it appeared to be the easiest thing to install and meet our needs. WE LOVE THE PRODUCT. It is SO MUCH EASIER and less messy than the pink rolled stuff! We knew we had to make a lot of cuts, since our joists were not 16 on center, and the serrated bread knife is the perfect tool. Would totally recommend this to anyone, do not waste your money on another product. For an added R Value, we also used Roxul ComfortBatt and blown in insulation. [This review was collected as part of a promotion.] October 28, 2016
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