4.6 
166 *The Angi rating for Insulation Service companies in Clayton, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
*The HomeAdvisor rating for Insulation Service companies in Clayton, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Insulation Service needs.
Last update on May 19, 2026
Serving Clayton, CA and surrounding areas
Approved
In business since 1988
Free estimates
Warranties offered
"The guy checked my house, told us our insulation is good enough and we don't really need to do anything. Thanks for the honesty. I will definitely recommend this guy to my friends."
Serving Clayton, 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."
Serving Clayton, CA and surrounding areas
Approved
In business since 2009
Free estimates
Emergency services offered
"This company came in a updated our 40-year old home insulation with new R-38 batting. We were impressed how much attention to detail the company has for removing old insulation, clean-up, disinfection, and installing new insulation. They also replaced a damaged dryer vent in the crawlspace. Nico and Jeremy were a great combo to work with from quote through install. I plan on calling them back in spring for another project."
+3895
Serving Clayton, 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."
+52
Serving Clayton, 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."
+86
Serving Clayton, CA and surrounding areas
In business since 1974
Credit card accepted
"It feels good after the insulation was done. They did very good work."
+4
Serving Clayton, CA and surrounding areas
In business since 2010
Free estimates
Credit card accepted
"We had a problem where rats used to get in the attic via the air spaces. This big problem caused an infestation that required us to solve this problem and to replace the insulation.
Adam from Attic master, was very nice to us and understood the problem very well. He sent to our house one his main guys to check and see how he can help us solving this problem. As part of his great service, he was also able to close all the openings on top of the new insulation.
I'm very happy that 1 company could solve this problem once and for all.
"
+7
Serving Clayton, CA and surrounding areas
Free estimates
Emergency services offered
Credit card accepted
"Our home was very hot this summer and the power for the HVAC wasn’t really good , Attic efficiency added for us more insulation in the attic and the walls , we feel the change now , They was great , highly recommended"
+13
Serving Clayton, CA and surrounding areas
Free estimates
Credit card accepted
Attic Bright is an insulation company and pest control company that helps clients with insulation issues, rodent etc. We proud to say our prices are the best in the industry.
Serving Clayton, CA and surrounding areas
In business since 1993
Free estimates
Emergency services offered
"They arrived right when they said they would and did an amazing job. Looks seamless, left work area immaculate. Would highly recommend!"
+28
From average costs to expert advice, get all the answers you need to get your job done.
The cost of blown-in insulation in San Francisco, CA varies depending on the type of insulation, labor, prep work, and more. Learn more about the cost factors in this guide.
New insulation makes your home more comfortable and boosts energy efficiency. Use this guide to budget for insulation installation costs in San Francisco, CA.
Crawl space insulation costs vary by size, insulation type, and material. Read this guide to learn how much your crawl space insulation could cost.
What is insulation? This behind-the-scenes home fixture will maintain comfortable temperatures in your home no matter the season. It’ll lower energy bills, to boot.
Removing old insulation may be necessary for upgrading your insulation. Keep reading to see if you should remove old insulation before adding new insulation.
Learn about non fiberglass insulation alternatives, including cellulose, soy, wool, blown-in, spray foam, cotton insulations, radiant barriers, and new materials.
