Prices, Promotions, styles, and availability may vary. Our local stores do not honor online pricing. Prices and availability of products and services are subject to change without notice. Errors will be corrected where discovered, and Lowe's reserves the right to revoke any stated offer and to correct any errors, inaccuracies or omissions including after an order has been submitted.

SANCTUARY by Greenfiber R- 60 Cellulose Blown-In Insulation with Sound Barrier 48.7-sq ft per bag ( 25-lb )

Ratings & Reviews for US Greenfiber SANCTUARY by Greenfiber R- 60 Cellulose Blown-In Insulation with Sound Barrier 48.7-sq ft per bag ( 25-lb )

4.2
361
Review
 4.2 out of 5
362 Reviews


83% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

This blown-in cellulose insulation is generally effective at insulating and reaching difficult areas. Customers report good insulation performance and cost-effectiveness. However, some experienced issues with the rental equipment, such as clogging and limited availability of functioning blowers. A few also noted the dustiness of the material and presence of debris. Overall, most customers were satisfied with the product and would recommend it as a good DIY insulation option that can provide significant energy savings, despite the potential challenges with the installation process.

Customer review summary generated by AI, including incentivized reviews.
362 Customer Reviews

Dust goes everywhere

Easy, good qualtiy

May 10, 2026
Verified Purchaser
Was this Review Helpful ?

Attic insulation

Would Recommend

Easy to spread in attic

May 10, 2026
Verified Purchaser
Was this Review Helpful ?

Product must be broken in small sections

Would Recommend

Product is as advertised

May 10, 2026
Verified Purchaser
Was this Review Helpful ?

Delivery driver was very professional and on time.

May 1, 2026
Verified Purchaser
Was this Review Helpful ?

Works awesome

Would Recommend

Easy to apply

April 26, 2026
Verified Purchaser
Was this Review Helpful ?

Quality product

Would Recommend

The product was used for filling some inaccessible locations on an existing structure. It went into the space and filled it nicely.

April 21, 2026
Verified Purchaser
Was this Review Helpful ?
Response from Greenfiber

Thank you for your review of SANCTUARY. We’re pleased that we were able to meet your insulation needs!

GreenfiberApril 28, 2026

Great for filling in gaps

Would Recommend

The insulation was great for helping me fill in some gaps in my attic. It was useful for small jobs but would take several bags for anything larger. My only drawback is that it comes very tightly packed so it took a while to fluff it by hand if you don’t have a machine for installing the insulation.

April 19, 2026
Verified Purchaser
Was this Review Helpful ?
Response from Greenfiber

Thank you for your review of SANCTUARY. We’re pleased that we were able to meet your insulation needs! As a note, the SANCTUARY product is packaged f...

GreenfiberApril 20, 2026

Good Insulation. Crappy Lowes.

Would Recommend

How do you offer a free rental machine with purchase of 20 bags and then after purchase mention that you don't actually have any machines to rent? None of the Lowes in the Redlands CA area have it. What are you supposed to do with this product if you can't blow it in?

April 18, 2026
Was this Review Helpful ?
Response from Greenfiber

Thank you for making us aware of this situation. The Pro desk, tool rental associate, or insulation associate at your local store should be able to p...

GreenfiberApril 20, 2026

Great Material Poor Equipment Management

Price is very good, the material is easy to spray into the attic, and the applicator machine is easy to operate. The material is already making a positive change in my a/c usage as well as heating. The negative part is I bought the material from Lowe's to be delivered a week later. When I made my purchase A Lowe's employee told me I could come by the store after I received my delivery and take an applicator machine for 24 hours at no charge, he also told me there are 2 machines available. When ...

April 16, 2026
Verified Purchaser
Was this Review Helpful ?
Response from Greenfiber

Thank you for your feedback, but we're sorry to see that your experience was not completely satisfactory. Please give our support team a call at ...

GreenfiberApril 16, 2026

Diy project

Would Recommend

Easy to work with

April 16, 2026
Verified Purchaser
Was this Review Helpful ?
Response from Greenfiber

Thank you for sharing about your positive experience with SANCTUARY!

GreenfiberApril 16, 2026

Product review

Would Recommend

It was easy to transport and once put into the insulation blower machine it was easy to spray in the areas that needed insulation. What I didn't like was all the dust in creates while the machine breaks up the product but that's pretty hard to avoid so make sure it's done outside.

April 16, 2026
Verified Purchaser
Was this Review Helpful ?

Even a beginner can use this product!

Would Recommend

The process to blow in was quick and pretty easy. Only down side was the dust associated with the product. If the person loading the machine keeps it consistent, this helps immensely.

April 16, 2026
Verified Purchaser
Was this Review Helpful ?

Blown insulation

Would Recommend

Very dusty, wear facemask

April 1, 2026
Verified Purchaser
Was this Review Helpful ?

Great Product, Poor install experience

Would Recommend

seems to be a common issue for lowes or their competitor in that they sell a product they cannot support. ended up blowing in 52 bags but its a pain to find the machine and then get it loaned out. Most staff didnt know what to do in 3 lowes I went to..3rd one atleast took the time to figure it out

March 28, 2026
Was this Review Helpful ?
Response from Greenfiber

Thank you for making us aware of this situation. We would appreciate you giving our support team a call at 1-800-228-0024 with more information so th...

GreenfiberApril 16, 2026

Diy Dropped my Utility Bills In 100 Year old home

Would Recommend

I was insulating a 100 year old attic. This product made the home much more quiet and also dropped our heating bills . I'll see how the cooling bills are this summer, but I'm pretty sure the AC won't have to work as hard also. It was easy to install with the free loaned blower from Lowes and it is definitely a diy project, although wear a good n95 mask..It is dusty when installing. And the Lowes staff was very helpful loading in the warehouse.

March 15, 2026
Verified Purchaser
Was this Review Helpful ?
Response from Greenfiber

Thanks for your feedback. We’re glad to hear that you're already experiencing the difference with SANCTUARY!

GreenfiberMarch 16, 2026

Good product

Would Recommend

Fluffed up well and was not too itchy.

March 11, 2026
Verified Purchaser
Was this Review Helpful ?

Would Recommend

My 5 star review is strictly for the insulation, not the machine. I mention the machine at the end, but let's just say they're not worth the effort. I used this stuff to go from R49 to R60 and it worked great. It fluffs easily and the 10% extra the company's calculator suggested ended up getting returned because I was over R60 everywhere I measured. I was in shorts and a t shirt and because this stuff isn't fiberglass, you don't itch at all. It kicks up dust and sticks to your sweaty skin, but...

March 8, 2026
Was this Review Helpful ?
Response from Greenfiber

Thank you for your review of SANCTUARY. We’re pleased that we were able to meet your insulation needs! We're sorry about the frustrations with th...

GreenfiberMarch 9, 2026