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Description
Johns Manville R-21 Unfaced Fiberglass Batt Wall Insulation, 67.81-sq ft Coverage (15-in W x 93-in L) – U1321SR 21 Unfaced Fiberglass Batt Wall Insulation Formaldehyde free Johns Manville R 21 unfaced fiberglass batts deliver thermal and acoustic performance for 2x6 wood stud walls. Precut to 15 in. x 93 in., this multi pack covers 67. 81 sq ft and installs easily between 16 in on center studs to improve energy efficiency and sound control. Key Features: Designed for 2x6 Walls: Precut 15 in x 93 in batts fit 16 in OC wood studs for fast installation Thermal +
R-21 Unfaced Fiberglass Batt Wall Insulation
Formaldehyde-free Johns Manville R-21 unfaced fiberglass batts deliver thermal and acoustic performance for 2x6 wood-stud walls. Precut to 15 in. x 93 in., this multi-pack covers 67.81 sq ft and installs easily between 16-in on-center studs to improve energy efficiency and sound control.
Key Features:
- Designed for 2x6 Walls: Precut 15-in x 93-in batts fit 16-in OC wood studs for fast installation
- Thermal + Acoustic Performance: R-21 value helps reduce heat loss and dampens sound transmission
- Unfaced Convenience: No vapor barrier—ideal for adding to existing insulation where needed
- Healthy Home Certifications: Formaldehyde-free, GREENGUARD Gold, and SCS recycled content certified
- Durable Fiberglass: Will not rot, mildew, or corrode pipes, wiring, or metal studs
Specifications Table:
| Specification | Details |
|---|---|
| Coverage Area (Sq. Feet) | 67.81 |
| Length (Inches) | 93 |
| Width (Inches) | 15 |
| Thickness (Inches) | 5.5 |
| Faced/Unfaced | Unfaced |
| Insulation Type | Fiberglass |
| Maximum R-Value | 21 |
| R-Value per Inch | 3.8182 |
| Fits 2 x 6 Walls | Yes |
| Fits 2 x 4 Walls | No |
| For Use in Walls | Yes |
| For Use in Basements | Yes |
| For Use in Attics | No |
| For Use in Ceilings | No |
| For Use in Floors | No |
| Stud Spacing (Inches) | 16 |
| Framing Type | Wood studs |
| Vapor Retardant | No |
| Sound Barrier | Yes |
| Formaldehyde Free | Yes |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| Warranty | 1-year limited |
| Bag Dimensions (L x W x D) | 20 x 20 x 50 |
| Package Weight (lbs.) | 25 |
| Package Type | Multi-pack |
| Package Count | 7 |
| Multi-Pack Quantity | 5 |
| Total Package Quantity | 35 |
| UNSPSC | 11162400 |
Frequently Asked Questions (FAQ):
Q: How much area does one package cover?
A: 67.81 square feet per package.
Q: Is this insulation faced?
A: No, these are unfaced fiberglass batts without a vapor retarder.
Q: What framing is it designed for?
A: Precut for 2x6 wood-stud walls with 16-in on-center spacing.
Q: What is the thickness and R-value?
A: Batts are 5.5 inches thick with an R-21 thermal resistance.
Q: Is it certified for indoor air quality?
A: Yes—GREENGUARD Gold certified and SCS recycled content certified; also formaldehyde-free.
Quiet Strength for Modern Walls
These sleek, unfaced batts slip into 2x6 cavities like they were tailor-made, wrapping your rooms in a hush of comfort. I love the crisp, bright fibers—an understated detail that speaks to clean, contemporary builds. Pair with smooth drywall and pale oak trim to heighten the serene, gallery-like feel. It’s a quiet luxury essential—performance insulation that elevates how your home looks, feels, and lives.
Upgrade your walls with R-21 performance today and enjoy a quieter, more energy-efficient home.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Great entertainment, charges quickly!
Color: Orange
Super fun entertainment for dog! Toy ball charges quickly and the charge lasts for at least an hour of playtime for the dog. There are 2 modes. one mode Just lights up, which makes it easy for pet to chase it. The second mode not only lights up, but it also wiggles on the ground Randomly and speeds off in a direction on its own, which really makes it interesting for your dog or cat to follow! Once the ball is not touched for about thirty seconds, it goes dormant and it will stay like that As long as it's charged until somebody touches it, and then it starts up randomly lighting up and moving around the floor on its own And making a vibration noise. It's a lot of fun to watch the dog chase and play with, and it certainly keeps them entertained for a while! The laughs and fun entertainment are definitely worth it. The only downside is that my dog chewed off the soft fabric covering in about twenty minutes.And she's not a real big chewer. It looks better with the covering on it, but even without it, the ball works fine and she plays with it every day.So that is not a showstopper. But good to supervise your dog for safety.In case they are a chewer, and they decide to destroy the cover. But the ball works fine without the cover too!
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Reviewed in the United States on March 12, 2026
★★★★★ 4
Looooves her crazy new ball
Color: Orange, Color: Orange
Our 90lb mastiff/boxer mix Indie is very playful, curious and energetic. She needs toys that engage her and keep her busy. This ball does the job!
We’ve had it for less than a week. Here’s what I love and what could be better:
PROS:
• She dog loves it. She whines for it. She gets absurdly excited when I get it out. She’s a bit of an anxious dog, but had zero problems with it inexplicably coming to life.
• It lasts a while on a single charge, so it keeps her busy for a good long time. The longest we’ve used it at a stretch is an hour.
• It’s pretty durable. She’s a super chewer (destroyed every “non-destructible” toy we’ve purchased for her), but the actual ball is hard plastic. She gnaws on it and it gets scratches, for sure. But she’s not going to chew it to pieces.
• On carpet, it’s reasonably quiet.
• It comes with a replaceable silicone button.
• It’s easy to charge…just pull off the silicone button and the charging port is inside.
• The silicone button is flush with the ball’s hard plastic surface, so there’s no way for her to pull the silicone button out and swallow it or get to the charging port.
CONS:
• Cover is worthless if your dog is a chewer. It goes on like an envelope with a Velcro closure. We took it off immediately.
• Without the cover, it’s very noisy on hardwood floors. To us, it’s worth it. (Though, I work from home, so I might feel differently after the holiday vacation.)
• She’s an XL dog, so she can fit the whole ball in her mouth easily and accidentally chomp down on the button and turn the ball off. Not a big deal, just something to know if you’ve got a Lab or larger dog.
• With extended playtime, the two halves can come unscrewed, especially with a large dog who uses their paws/jaws on it a lot. Thankfully, it makes a loud buzzing noise when this happens, so we know we need to take it from her and screw it back together. Is this a potential danger? With the rechargeable battery inside, I’d say yes. But we also don’t let her play with this toy without supervision. So keep that in mind.
Bottom line:
It has its drawbacks, but it keeps her entertained and seems like it should last her at least 6 months with supervised play. Which is honestly REALLY good when we’re talking about Indie, Destroyer of Toys. I’d buy it again.
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Reviewed in the United States on December 31, 2024
★★★★★ 3
Difficult/impossible to unscrew plastic cups (in order to recharge the vibrating/blinking device)
Color: Orange
Generally, I don't leave feedback on items purchased. However, in this case, I feel compelled to do so in hopes the mechanical engineers (of this product) will take my input to heart and ultimately modify it.
First the pros...
- I have 2 high-energy dogs (Jack Russell Terriers) who love their toys (e.g., chewing bones, tug-of-war, etc.) but usually get bored with them rather quickly.
- This interactive PetDroid ball, however, keeps them busy for a long time.
- In fact, my smaller dog (Max) knows its storage location and sits (as early as 6 AM) in front of the cabinet so that I give him "his ball". It keeps him busy for up to 1-2 hours at a time.
- Max is literally addicted to the PetDroid ball... his determinant play with it makes me laugh all the time.
Now, the cons...
- After several days of play, the exterior looks chewed up quite a bit. That's no problem though.
- Unfortunately, the interior "threads/grooves" of the two plastic cups (for closing/fasting) are very tiny.
- Thus, after an hour-long hard play, it is almost impossible to unscrew the 2 plastic cups in order to recharge the interior device.
- It appears the 2 cups somehow come off track and get realigned from the inside.
- At that point, I cannot unscrew the PetDroid ball in order to recharge the device.... and without the blinking/vibration, this toy is no longer fun for play.
- Ultimately, I had to place the bottom half of the ball into a vise and then use a plumbing wrench to untwist it.
Proposed Solution:
- Increase the size of the plastic cups' interior threads/grooves so that they won't get realigned/come off track.
- This would mitigate the current dilemma of NOT being able to unscrew the ball in order to recharge it.
In my view, this should be a relatively simple fix and significantly improve the durability of this product.
Thank you for your time.
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Reviewed in the United States on February 4, 2022
★★★★★ 5
Good fun and entertaining!
Color: Orange
A really fun interactive toy for your dog! It's pretty erratic and really gets him chasing it. The included soft cover was kinda hard to install and then it's hard to turn it off and on with the cover on, I feel like the cover didn't really improve it at all, sure it's louder without the cover but I feel like dog also likes it that way, he likes loud squeaky toys and this thing making a bunch of noise is appealing to him. We have mostly hardwood floors so it really gets moving, I'm sure on carpet it would be a bit quieter and maybe even a bit slower to move around but on hard smooth surfaces this things can really get zipping around abd get some speed to make him chase it. Overall a fun and entertaining toy.
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Reviewed in the United States on January 27, 2026
★★★★★ 5
Awesome
Color: Orange
Awesome Toy . My Jack is crazy over it. She usually get bored with others, but this toy still has her attention after a couple of weeks Runs a long time on a short charge. 👍🏻
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Reviewed in the United States on May 30, 2026
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