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5k+ bought last week
Johns Manville Attic Protector R- 19 Fiberglass Blown-In Insulation with Sound Barrier 109-sq ft per bag ( 25.2-lb )
Johns Manville Attic Protector R- 19 Fiberglass Blown-In Insulation with Sound Barrier 109-sq ft per bag ( 25.2-lb )
$67.22
$67.22

1k+ bought last week
Johns Manville Multi-Purpose R- Attic Wall Unfaced Fiberglass Roll Insulation 5.33-sq ft ( 16-in W x 4-ft L ) Individual pack
Johns Manville Multi-Purpose R- Attic Wall Unfaced Fiberglass Roll Insulation 5.33-sq ft ( 16-in W x 4-ft L ) Individual pack
$9.97
$9.97
Maximum R-Value: 0
Width (Inches): 16
Items Included in this Collection
Enhance your home’s energy efficiency and sound control with the Attic Protector Collection from Johns Manville. A well-insulated home offers year-round comfort and savings, and choosing a trusted brand like Johns Manville ensures quality and performance you can rely on. When it comes to insulation, think Johns Manville—think the Attic Protector Collection.


Johns Manville Attic Protector R- 19 Fiberglass Blown-In Insulation with Sound Barrier 109-sq ft per bag ( 25.2-lb )
Item #213143 |
Model #B785SW
Learn how this product can help you earn more in tax credits in PDF's below
Formaldehyde free, loose fill insulation for use in attics, ceilings and walls; Install using an insulation blowing machine.
Can be installed on top of existing insulation
Improves energy efficiency
JM is a partner of the Seal and Insulate with ENERGY STAR program
SCS Recycled Content certification
GREENGUARD Gold Certified for office indoor air quality and SCS Certified for home indoor air quality
General | |||
|---|---|---|---|
Series Name | Attic Protector | Insulation Type | Fiberglass |
Dimensions | |||
|---|---|---|---|
Bag Dimensions (L x W x D) | 38-in x 9-in x 19-in | R-Value per Inch | 2.67 |
Coverage Area (Sq. Feet) | 109 | Maximum R-Value | 19 |
Package Weight (lbs.) | 25.2 | ||
Features | |||
|---|---|---|---|
Formaldehyde Free | Yes | Vapor Retardant | No |
Sound Barrier | Yes | ||
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | No | GREENGUARD Gold Certified | Yes |
ENERGY STAR Certified | Yes | ||
Compatibility | |||
|---|---|---|---|
For Use in Basements | No | For Use in Garage Doors | No |
For Use in Crawlspaces | No | For Use in Masonry | No |
For Use in Ceilings | Yes | For Use in Plumbing | No |
For Use in Attics | Yes | For Use in Vents | No |
For Use in Doors | No | For Use in Walls | No |
For Use in Duct | No | For Use in Windows | No |
For Use in Electrical | No | Fits 2 x 4 Walls | No |
For Use in Floors | No | Fits 2 x 6 Walls | No |
Miscellaneous | |||
|---|---|---|---|
UNSPSC | 30141500 | ||
Review
145 Reviews
94% Recommend this product
The average rating may include incentivized reviews that are labeled with a badge. Select customers might be asked to provide honest feedback (good or bad) in exchange for a small reward.
145 Customer Reviews
Shawnee Lowe's is the best.
Robert at the Shawnee Lowe's is incredible to work with and always helps us get the materials we need for our jobs
Koala Insulation of KCDecember 3, 2025
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Blower Machine Shenanigans
I'm writing this review hoping it arrives to a rep that can address this issue. I see online that you can get a free blower machine rental when you buy "X" amount of bags. A quantity I'll easily surpass. I couldn't find any other other online information on how this is done. I've gone in multiple times (weekends, later in the evening) and was told "we don't rent anything at this store". Hard as I tried I was unable to get good intel from the pro desk, cashier, and even a "manager" over thei...
FrustratedJune 17, 2025
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Great do it yourself - DIY project
Did a 500 square-foot attic, adding blow in insulation on top of the existing blown in insulation. My daughter and I added six bags in about an hour and a half. Total project time 4 hours. Prep time another two hours. Marked trusses to level of inches or R level needed. Two things I would recommend, make sure you use 100 foot of hose even if you don't need it because the inside of the hose is ribbed helping to break up the material and don't pack the material into the hopper gently push it i...
ColoradoLarryMay 6, 2025
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Good product but questionable coverage
Took 31 bags to blow a 1300 square foot attic (including framing) to ~15". Used a laser level in attic to make sure it was pretty darn close to 15" everywhere. Their calculator says 51 square feet per bag at R38. So this would mean 25.5 bags. And subtract for framing, maybe <25 bags. So somethings not right.... My local lowes was really bad. Bought 34 bags, machine they sent me home with was missing the remote, so I couldn't use it. Went back, they couldn't find remote. So I had to go t...
Core2QuadFebruary 5, 2025
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Lowes wasted 3 hours of my time
Arrived at Lowe's. Asked about renting the insulation blow machine. I was told to go to the pro desk. After waiting behind 3 customers I was told to go to customer service. After waiting behind 5 customer returns I was then walked back down to the pro desk by customer service and we then spent the next 30 minutes getting my order rung up and checked out. I was then sent to the back to pick up my order. I then proceeded to wait over an hour for my insulation and the blower machine to be loaded on...
PaulkDecember 23, 2023
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Response from JohnsManvilleTeam
Sorry to hear of your troubles renting the machine. That does sound frustrating. Thank you for (attempting to) choose JM on your project. I hope Lowe...
JohnsManvilleTeamDecember 27, 2023
No brainer!!
My secondary attic is about 350 sqft, had about 5 inch of bat rolls (theoretically R-19), with some gaps on top of walls around pipes and conduits. The room below felt like a refrigerator in the winter. I blew in additional 15-20 inches. It made a dramatic difference, the room feels very comfortable now and when I turn heat on it does not take forever to warm up. It cost me under $200 for an attic.
NikolayFebruary 14, 2025
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good product and service
product was good but my local store didn't have a machine to blow it in and had to go to store in decatur al and get the machine and bought the other 30 bags i used .The store in decatur had the best customer service of any lowes i have ever been in . Lowes needs send all asociates to the decatur al store for their training.
wpccDecember 27, 2024
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Great value, not difficult to do.
My wife fed the blower and I was in the attic spraying an additional layer of insulation. Never did it before but it was easy to do. I recommend eye protection as well as earplugs. It wasn’t that noisy but some of that fiberglass can get into your ears and that’s not good. A lot of insulation for the cost, I think it was a great value
Tom CNovember 29, 2024
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Good DIY freindly product
Read other reviews which were very helpful. My .02c - Have machine checked out before you take it out of the store. Make sure hose has the lock sleeve to attach it to the machine. The base of the machine is HEAVY- I hauled it up 3 stories but probably could have left it at ground level - the air flow seemed more than sufficient to transport the media up that far. 2 are required to operate the machine. "IF" the bags are cut as shown on my placard, feeding was easy and relatively jam free. Pay at...
Jav1January 30, 2015
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It Snowed in my Attic!
Me and my Son-in-Law blew in 21 bags in our attic. House was built in 73 and had some old insulation in it. We blew this in over top of the existing insulation. He ran the machine and me the hose. Put about 16" on top of the original R19 (that had settled over the years). What a difference this has made. It took us a bag or two to get the hang of the machine and hose, but after that we were knocking it out. House feels great and the AC is running less in the Texas heat.
HandymanJuly 6, 2023
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I am so sorry to hear about this frustration and you're right - that is REALLY frustrating. It is up to each store to make sure their blowing mac...