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25 lbs. Cellulose Blown-In Insulation or Spray Applied Insulation

Covers 48.8 sq.ft. (35¢ /sq.ft.)
Buy 30 or more $14.42 /sq.ft.
  • Reduces sound by 60% and heating and cooling costs by up to 20%
  • Locks in carbon for the life of your home
  • Free 24-hour machine rental with purchase of 20 bags
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Product Details

SANCTUARY by Greenfiber can be installed in attics, walls, floors and ceilings to significantly improve the comfort, safety and well-being provided by any home. This is the first All-In-One cellulose insulation that can be blown-in or spray-applied, and it's suitable for all climates and conditions. Capable of reducing sound power by 60% and heating and cooling costs by up to 20%, it's made from recycled plant fibers which keep carbon locked in for the life of your home.
  • First all-in-one cellulose insulation is ideal for attics, sidewalls and ceilings, and can be blown-in, dense-packed or spray-applied
  • Covers 48.8 sq. ft. per 25 lbs. bag at R-19 to reduce job site time
  • Fits any wall type: 2 x 4, 2 x 6 or 2 x 8
  • New formulation is suitable for all climates
  • Can be installed over existing insulation
  • No-itch formula doesn't require cutting tools, allowing for installation in just 3 steps: 1) assemble machine 2) place machine on flat, dry surface 3) point and blow in
  • Reduces outside noise when applied in walls
  • Made with 85% post-consumer paper and uses low-energy manufacturing and short-haul transportation, resulting in insulation with lower embodied carbon
  • Locks in carbon for the life of your home to reduce global warming
  • Advanced fire resistance provides more time to escape and meets class 1 fire rating
  • Limited lifetime warranty
  • Return Policy



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Customer Reviews

4.1 out of 5
  • 4.1
    out of 257 reviews
  • 65% recommend this product
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Showing 1-10 of 257 reviews
Worked fantastic! The machine worked well - only clogged twice in 20 bags blown in. Clog works self out when you stop feeding for couple minutes. Blows it out airy and fluffy like you expect. 100 foot hose is a lot! Very happy.
    We had existing insulation in most areas in our roof, but absolutely no insulation over one of our bedrooms and garage. We used to feel heat and cold from all over the home when you raised your had up toward our ceiling. Just couldn’t keep the home cool or keep heat inside our home. This last Artic blast caused our electric/heating bill to be over our usual bill expenses it was way over $300. We had to make changes. Blowing the Greenfiber cellulose in our roof has allowed for our air conditioner to stop running constantly this summer. I can’t wait to see what the furnace will do this winter 2023-2024.
    • Verified Purchase
    1 found this review helpful
    Dusty, hard work but effective
    Installed 60 bags into our dusty, tight hot attics. Lessons: (1) Work when cool and cloudy. (2) Big green square machine heavy and old but worked perfectly. (3) Recommend product delivery. (4) 1-2 plastic pieces per bag and small. (5) Dusty! (6) 8-10” on top of current 6”: home noticeably cooler. (7) 12” over garage which had none prior - VERY nice in garage now. (8) Cut 4” holes and blew in some garage walls- worked well! (7) OVERALL: hard, dusty but strangely satisfying work.
      • Recommended
      3 found this review helpful
      Mixed feelings
      I decided to go with cellulose after much research and videos. I have a split level house so 2 attics. They are each about 850-1,000 sq ft. I bought and installed baffles for blow in insulation. I got 50 bags of these and only got about 13 inches of thickness. The machine was the main issue for us. It was loud and clogged a lot on the first evening. We started again early the next morning and after about 2 hours the squealing stopped and it worked much better. It took much longer than expected.
        • Recommended
        Extremely Satisfied!
        After receiving some VERY pricey estimates, I chose to do it myself with a friend. We blew 30 bags into 1200 sq. Ft attic in 5 hours. Immediately noticed results. As long as your not afraid of doing the work for a few hours, you’ll really love the amount of money you’ll save by doing it yourself!
        Response from GreenfiberNov 3, 2022
        Thank you for sharing your experience with installing SANCTUARY!
          • Recommended
          6 found this review helpful
          Beware of the non-cellulose material
          I purchased these in February for a sidewall retrofit to blow into 1"holes. it was nice to get the pallets delivered to the house. If i hadn't already rented the blower a week ago, id have returned them. Lots of plastic debris. Who ever was working the hopper would pass the boredom pulling out debris. In addition to lots of plastic bag pieces, there were pieces of fabric, yarn, latex gloves, candy wrappers,disposable diapers, aluminum, metal, and a silk flower. So wear eye protection!
            12 found this review helpful
            Immediate difference
            Mostly I was concerned with how the blower would perform and it exceeded expectations. Sprayed 18 bags in under 2 hours. Also the air didn't turn on till 4 in the afternoon the first day and maintained 69 degrees with ease. It's early, but very pleased thus far!
            Response from GreenfiberMay 2, 2022
            Hi Chris, thanks for sharing about your positive experience with SANCTUARY. Enjoy those consistent temperatures!
              • Recommended
              9 found this review helpful
              First, the loose fill insulation product is just fine, I'd...
              First, the loose fill insulation product is just fine, I'd buy it again, no problem. HOWEVER!!!!! The shipping was absolutely unacceptable! Two 25lb bags, which could have been stuffed into two cardboard boxes and send via UPS, came instead on a wood pallet, heavily wrapped in plastic, delivered by a heavy truck, requiring a signature. Com'on Home Depot - this is the only planet we've got, how much energy and materials are you going to use!! There are a lot of products that HD won't ship to home. If you're going to warm the planet by a degree every time some DIYer buys a couple bags of recycled newspaper, then add this product to the 'Do not Ship' list!
              • Verified Purchase
              9 found this review helpful
              Cellulose Insulation
              Blow in material for additional attic insulation. Pricy solution if you need 30 pacs!
              • Verified Purchase
              5 found this review helpful
              Easy to install, really dusty
              We blew-in 99 bags with our 24-hour rental--putting 1 bag into the hopper every 4-5 min with 3 people. Only fill to the grate because it needs the air to fluff up. Remove plastic as you fill, but stop every 25 bags to get plastic off the mixer paddles.
                • Recommended
                18 found this review helpful
                Showing 1-10 of 257 reviews