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TRUSTED BY BRENTWOOD, CA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon99
    Verified insulation services reviews

Top-Rated Insulation pros in Brentwood - Updated Nov 2026

Avatar for ThermaCore Insulation Inc.
ThermaCore Insulation Inc.
5.0(
26
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+1 more

Serving Brentwood, CA and surrounding areas

Approved

In business since 2016

Free estimates

Warranties offered

"We hired ThermaCore Insulation to remove our old attic insulation, air seal the attic, and install new insulation. Kamal and his crew were professional, honest, and easy to work with from start to finish. During the inspection, they found several air leaks and duct issues that other companies completely missed. They explained everything clearly, completed the work on time, and left the area clean. We noticed a big improvement in comfort right away. Great service, fair pricing, and quality workmanship. Highly recommend ThermaCore Insulation!"
ThermaCore Insulation
applying 2-inches closed- cell spray foam
shipping container
project preparation
first code completion

+28

13 neighbors recently requested a quote
Avatar for Eagle Shield
Eagle Shield
4.3(
18
)
Batt, Rolled or Reflective Insulation - Install or Upgrade

Serving Brentwood, CA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"I love this company! Garrett came to my home and assessed how efficient our current insulation, etc was. He was very informative and friendly — explained what we needed and how they could help. At the time, I decided to hold off and he never pushed the sale. When I was ready, he was quick to accommodate my schedule. His team: Angel, Luis, Tommy and TJ were great! They arrived early, were professional, courteous, kind, very helpful with my questions and were above and beyond to help fix things that I wasn’t even aware of. They also were more than happy to help with small problems that I had no idea how to fix. They worked quickly and cleaned up afterwards. You could tell they cared about their work which makes me feel confident that the job was done right. They were also fun to have around — my Great Dane loved them too! Garrett and Dave checked in with me during and afterwards to make sure things were going well and if I had any questions. I highly recommend Eagle Shield."
Additional Photos
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Additional Photos

+9

Response time7 hrs
6 neighbors recently requested a quote
Recommended by84%of homeowners
Avatar for Attic kings
Attic kings
5.0(
10
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install+1 more

Serving Brentwood, CA and surrounding areas

Approved

Free estimates

Warranties offered

Customers say: True professional

"Attic Kings is a 5 star business. I had my insulation replaced and my home rodent proofed by them 3 years ago. They came out today just to check something for me at no charge.The customer service was and is outstanding. I highly recommend Attic Kings. They are very nice and kind as well."
Additional Photos
Response time5 days
Response rate100%
3 neighbors recently requested a quote
Avatar for Attic Pros
Attic Pros
4.9(
233
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving Brentwood, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Small jobs welcome

"I was looking online for insulation contractors, and found Attic Pros, Chris and his team arrived on time installed brand new attic insulation, cleaned our Crawl space and installed insulation, they took photos before and after. I am very happy with the work was completed defiantly recommend these guys."
Blow-In Attic Insulation
San Jose, CA Attic Insulation Installation
Danville, CA Vapor Barrier Installation
Mill Valley, CA Crawlspace Cleaning
Benicia, CA Attic Cleaning & Insulation

+3137

Response time12 hrs
Response rate94%
148 neighbors recently requested a quote
Avatar for CA Attic Solutions Inc.
CA Attic Solutions Inc.
5.0(
13
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Brentwood, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

CA Attic Solutions \nAt CA Attic Solutions, we are dedicated to providing top-notch insulation solutions that enhance your home’s comfort, efficiency, and overall quality of life. Founded on the principles of excellence, integrity, and customer satisfaction, we have built a reputation for delivering reliable, high-performance services tailored to meet your unique needs. \n \nWe are committed to offering exceptional service, using the latest technology and highest-quality materials to ensure that your home remains comfortable and efficient throughout the year. \n \nhttps://californiaatticsolutions.com/

ATTIC INSULATION
9 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Atticare Construction
Atticare Construction
4.5(
177
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Brentwood, CA and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"The crew arrived on time and installed plastic on the floor and walls for protection. They did a good job removing the old insulation and installing new insulation. The crew did a great job cleaning up. Nice professional job."
Before Atticare Services
After Properly Sealing the Access
After Insulation Installation
Clean and ready for Insulation Installation
After Insulation Installation

+26

Response time2 hrs
Response rate91%
26 neighbors recently requested a quote
Avatar for American Attics
American Attics
5.0(
8
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+2 more

Serving Brentwood, CA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

"American Attic was everything they promised. Met with the owner , Sam, within a day to get a quote for removal of old insulation, rodent control and install of new insulation. He was professional and explained everything in detail of what was work was going to be done and how long it would take. We scheduled within a week at a reasonable price. His crew were neat, organized and finished on time! We were notified of some extra things that were found while they were on the job but were not pressured to have those things done. We recommend American Attic to friends or family and would definitely use them again."
Additional Photos
Additional Photos
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Additional Photos

+52

Response time2 days
Response rate100%
9 neighbors recently requested a quote
Avatar for Insulation Alliance
Insulation Alliance
5.0(
2
)
Spray Foam Insulation - InstallBlown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade+2 more

Serving Brentwood, CA and surrounding areas

Approved

In business since 2017

Free estimates

Warranties offered

"When Insulation Alliance came, they were very professional. They laid down plastic everywhere in the hallway and the bedroom. They cleaned out the whole attic. They took out the old insulation and put in the new Insulation which was R 44. They cleaned up everything and everything was clean when they left. They also sanitized the attic. You will not be disappointed that you hired."
Attic Cleaning
Attic, Crawl Space and Basement Decontamination
ATTIC, WALL, CRAWL SPACE INSULATION
THERMAL INSPECTION
REMOVING INSULATION

+86

11 neighbors recently requested a quote
Recommended by50%of homeowners
Avatar for AD Insulation
AD Insulation
5.0(
1
)
Blown-In Insulation - Install or UpgradeSpray Foam Insulation - InstallBatt, Rolled or Reflective Insulation - Install or Upgrade+2 more

Serving Brentwood, CA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

We specialize in insulation services. We strive to exceed expectations by delivering exceptional service, great quality work, and professionalism on every job. Read more below on all the services we offer and contact us with any questions or to schedule a free estimate today!

12 neighbors recently requested a quote
Avatar for All Seasons Insulation
All Seasons Insulation
4.9(
46
)
Blown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Brentwood, CA and surrounding areas

In business since 1986

Free estimates

Credit card accepted

"Joel and the team were fantastic and did a great job on my insulation removal and replacement. They answered all of my questions and gave me honest opinions on the job I wanted quoted, and which I then hired them for. They were punctual on both days of work, and they did clean and efficient work. I recommend them to anyone who needs insulation work done."
Attic before and after
Wall Being Drilled
Finished wall Insulation Injection
Wall insulation from Interior
Attic Insulation Upgrade

+6

Response time10 hrs
Response rate93%
Recommended by100%of homeowners
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Showing 1-10 of 68
Insulation FAQs, answered by experts

Natural fiber batts and spray foam insulation both work great for soundproofing. Newer materials, such as hemp batts, are more expensive but more effective for insulation and sound blocking. They are also more sustainable. There is also a professional system called Blow-In Blanket Insulation (BIBS) that is soundproof and moisture-resistant. However, BIBS must be installed professionally and can be a costly investment.

Yes, exposure to fiberglass insulation can cause harm to your skin and eyes. However, this typically refers to the fiberglass insulation that is mostly used in walls and attics. Fiberglass doors don’t pose risks for fiberglass exposure because they're fully encased in polymer cladding.

The ideal temperature for your garage in the winter is between 40 and 68 degrees Fahrenheit. Maintaining a minimum temperature of at least 40 to 50 degrees is crucial to prevent pipes, liquids, and other items from freezing. Low temperatures can also drain your car battery, so keeping the garage stable is vital for your vehicle. While the lower end of the range protects your belongings, the higher end is based on your personal preference for a comfortable space. If you struggle to keep the temperature from dropping below 40 degrees, consider installing a garage heater.

Insulation can be made of cellulose, fiberglass, polyurethane, polystyrene, or mineral wool. Radiant barriers are often made of aluminum or other similarly reflective materials, but they will need to be paired with something else because they don’t provide heating benefits. Cellulose is among the most eco-friendly options and may be recycled when it’s past its shelf-life, whereas polyurethane and polystyrene both emit harmful compounds and will need to be handled with care during installation.

If you have access to the foundation walls, adding spray foam insulation to your existing unfinished basement or crawl space is straightforward. Replacing existing insulation in your unfinished attic space is possible after removing the old insulation. However, spray foam insulating an existing wall after the drywall is in place isn’t possible unless you remove most of the drywall.

The Brentwood, CA homeowners’ guide to insulation services

From average costs to expert advice, get all the answers you need to get your job done.