Recycled & eco-friendly
Cellulose is made mostly from recycled paper fiber, giving it one of the highest recycled contents of any insulation.
Bay Area Cellulose Insulation · Licensed · 13+ Years
Cellulose Insulation in the San Francisco Bay Area
An eco-friendly, fire-resistant insulation made from recycled material — dense enough to seal the gaps and dampen noise other insulation misses. Professionally blown in for even, gap-free coverage.
Free estimateLicensed (CSLB #1022608)Eco-friendly & fire-resistant13+ years experience
Free on-site estimate · No pressure · We come to you
Why It Matters
A Dense, Eco-Friendly Fit
for Bay Area Homes
Cellulose is insulation made mostly from recycled paper fiber, treated with borate for fire and pest resistance. Because it's dense and blown in to fill a cavity completely, it does something loose batts often can't — it works its way into gaps, around obstructions, and into irregular spaces, air-sealing as it insulates.
That density also makes it one of the better insulations for sound dampening, and its recycled content makes it an eco-friendly choice — both a good fit for the Bay Area's mix of older homes and comfort-conscious owners. It's not the only option, though; if you're weighing materials, compare it with fiberglass roll and batt insulation, or see our full attic insulation installation service.
- Eco-friendly — made from recycled material
- Fire-resistant (borate-treated)
- Excellent sound dampening
- Air-seals as it fills gaps and cavities
- Solid R-value per inch (~R-3.5)
- Great for retrofits and older homes
Why Cellulose
What Makes Cellulose
a Strong Choice
The properties that set cellulose apart from looser, lighter insulation — all inherent to the material itself.
Fire-resistant
It's treated with borate, which gives it fire resistance and also helps deter insects and mold.
Sound dampening
Its density makes it noticeably better at reducing airborne noise between rooms and from outside than lighter insulation.
Air-seals & fills gaps
Blown in dense, it fills around wiring, pipes, and irregular cavities — sealing the gaps that let conditioned air escape.
Solid R-value
At roughly R-3.5 per inch, cellulose delivers strong thermal performance for attics and walls in our climate.
Ideal for retrofits
Because it's blown in, cellulose can be added to existing attics and packed into walls without tearing them open.
Is It Right for You?
When Cellulose
Is the Right Choice
Cellulose isn't the answer for every job — but it shines in these situations. We'll confirm the best fit at your free assessment.
An older home with air leaks
If your house is drafty and losing conditioned air, cellulose's dense, gap-filling coverage helps tighten it up.
You want an eco-friendly option
If recycled content and a lower-impact material matter to you, cellulose is one of the greenest insulations available.
Noise is a problem
For rooms next to a busy street or between noisy spaces, cellulose's sound-dampening density is a real advantage.
Retrofitting without a tear-out
When you want to add insulation to a finished attic or existing walls, blown-in cellulose goes in without demolition.
Irregular or hard-to-reach cavities
Where batts leave gaps around framing and obstructions, blown cellulose flows in and fills the space completely.
Fire safety is a priority
Its borate treatment makes cellulose a fire-resistant choice — reassuring for many homeowners in our region.
How We Work
Our Cellulose Insulation Process, Step by Step
Good coverage is about prep and the right density as much as the material. Here's how we handle every install.
Free assessment
We inspect your attic or walls, check current R-value and any moisture or rodent issues, and confirm whether cellulose is the right fit.
Prep & remove if needed
If existing insulation is old, compressed, or contaminated, we remove and haul it away first so the new install performs.
Target the right R-value
We calculate the depth and density needed for your home and climate, accounting for cellulose's natural settling.
Blow it in
We blow the cellulose in for even, gap-free coverage — loose-fill across attic floors, dense-packed into wall cavities.
Verify & clean up
We confirm the coverage and depth hit the target, clean up completely, and walk you through the finished job.
Free assessmentLicensed (CSLB #1022608)Even, gap-free coverage
Why Attic Pros
The Bay Area's Trusted
Insulation Installers
For over 13 years, Bay Area homeowners and businesses have trusted us for attic and crawl-space insulation — because we recommend the right material for the job, install it properly, and stand behind our work.
- Licensed contractor (CSLB Lic. #1022608)
- SPCB-registered for pest-related work (Co. Reg. #9901)
- Diamond Certified & Angi Super Service Award winner
- Independently reviewed — verified Google ratings
- Free, no-obligation on-site assessment
- Local team with 13+ years in Bay Area homes
Real Customers, Real Results
Trusted by Bay Area Homeowners
4.8
★★★★★
Based on 1,900+ verified Google reviews — trusted for insulation & home services across the Bay Area
Google Review
★★★★★
Rodent intrusion and the associated damage they cause is the worst! After reading reviews, I decided on Attic Pros because they have great reviews and because they specialize in the work I needed. I was not disappointed. Within a few days of reaching out, Tom came out and did the estimate. The work began only two business days later! The work was scheduled over two days but they did it all in one! The guys arrived on time and were cheerful, polite, and pleasant to deal with. Kevin showed me pictures and video periodically throughout the day so I could see the work, start to finish. He answered all of my questions and explained everything clearly and patiently. Before they left they made sure there was no trash or debris left behind. The crawl space now looks like it belongs under a brand new home, it’s that clean and tidy. I highly recommend Attic Pros for all of your insulation and rodent elimination needs. Update: I came back and edited this, removing a star. The work and workers were great. However, a few days after the job, Julian from their business office messaged me that they had not received payment and the invoice was past due, even though they were paid IN FULL THE DAY OF WORK. Proof of payment was provided and he messaged me that a receipt would be sent when the payment was deposited. Very disappointing and unprofessional of him to go after a customer for payment when the problem lies with their accounts receivable. 10/14/26 I am adding to my review because issues had been discovered over time. They had missed a place where rats were entering, even though they had been out twice to check traps and found some. This guy did a less than thorough cleaning but he did close off the previously missed access point. My rat intrusion problem has been ongoing. 11/6/26 Attic Pros followed through and sent out Raul, an excellent worker, who took care of everything and made it right. While it may have been problematic for a bit, they kept working until it was all made right. They have been kind and communicative, specifically Paula. I will be calling them again in the Spring to work on a different area of my home.
C Hensley
Google Review
★★★★★
Samim very professional
Rick Weiss
Google Review
★★★★★
Did crawl space cleanup and rodent proofing. They were very efficient and thorough.
James Feichtl
Google Review
★★★★★
Samim was great and work very hard. We appreciate him very much.
Amir assadi-rad
Google Review
★★★★★
Attic Pros did a great job with sealing up holes and gaps and installing mesh I would recommend them I had a good experience with them
Felipe Bernal
Google Review
★★★★★
UPDATE: I really appreciate the company followed up after my concerns were raised. They took accountability for what happened, handled the situation professionally, and offered to fix all the issues. Their responsiveness and willingness to make things right completely changed my impression, and I’m happy to update my review to 4 stars. They ultimately completed the job, but the overall experience was far from hassle-free. During the process, they damaged our ceiling and later repaired it, though the result was not fully satisfactory. There were multiple mistakes along the way, both in the actual work and in billing, which meant we had to stay very involved to ensure nothing was missed. Communication was also a challenge. Our consultant, Tom, was not as responsive as expected, especially given how busy schedules can be in the Bay Area. We often had to follow up multiple times to get updates or have issues addressed. Overall, while the job was eventually finished, the process required more oversight and effort than it should have. If I were to go through this again, I would choose a different company.
Daniel Yahyazadeh
QUESTIONS, ANSWERED
Frequently Asked Questions
Straight answers to the questions people actually ask about cellulose insulation — R-value, settling, how it compares, and install time. Still weighing your options? Our team is happy to help.
Still have questions?
Talk to our team — we're here to help.
(800) 543-0382Cellulose is roughly R-3.2 to R-3.8 per inch — about R-3.5 on average — which is a bit higher per inch than standard loose-fill fiberglass. The total R-value for your home depends on the depth installed; we calculate the right depth for your attic and our climate during the assessment.
Yes, cellulose settles somewhat after it's installed — that's normal for the material. A professional installer accounts for it by blowing in extra depth up front so that once it settles, you're still at the target R-value. Done right, the settling doesn't leave you short.
Cellulose is denser than loose-fill fiberglass, so it's better at air-sealing gaps and dampening sound, has a slightly higher R-value per inch, and uses more recycled material. Fiberglass batts are lighter, resist moisture differently, and can be simpler in open, standard-spaced cavities. The best choice depends on the space — we'll compare them for your specific job.
Cellulose is treated with borate, which makes it fire-resistant — it chars rather than readily fueling flames — and the same treatment helps deter insects and mold. It's a widely used, code-recognized insulation material.
Yes — it's made mostly from recycled paper fiber, giving it one of the highest recycled contents of any insulation and a lower manufacturing footprint than many alternatives. For homeowners who care about sustainability, it's one of the greener options.
Often, yes — blown-in cellulose can be layered over existing attic insulation that's still in good condition to boost the R-value. If the existing insulation is compressed, damaged, or contaminated by rodents or moisture, we remove it first so the new insulation performs.
It does. Because cellulose is dense and packs into cavities completely, it's one of the better insulations for reducing airborne noise — between floors, from adjoining rooms, and from outside. Homeowners on busy streets often notice the difference.
Most residential attic installs are completed in a single visit. Timing depends on the size of the area, whether old insulation needs to come out first, and whether it's an attic blow or a dense-pack into walls. We'll give you a clear timeline with your estimate.
LOCALLY OWNED AND OPERATED
Serving the Greater Bay Area & Sacramento Area
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