4.6 
121 *The Angi rating for Insulation Service companies in Rancho Cucamonga, 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 Rancho Cucamonga, 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 23, 2026
Serving Rancho Cucamonga, CA and surrounding areas
Approved
In business since 1959
Free estimates
Emergency services offered
"Everguard was great! Insulation job completed as scheduled and they were timely and professional."
+7
Serving Rancho Cucamonga, CA and surrounding areas
Approved
In business since 2006
Free estimates
Emergency services offered
"I love the insulation. My room has no insulation at all. Every time I entered the room after coming from work, it was like walking in an oven. With the insulation, my room now is cool in the afternoon. The price Pro Insulation, Inc. charged is reasonable. I just love it. It is a good investment."
Serving Rancho Cucamonga, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2023
Free estimates
Emergency services offered
"Jesus and his crew at Next Level Insulation completed my attic needs (Insulation & cleaning) flawlessly. They are true professionals! Jesus was very responsive in keeping appointments, providing a quote and completing the job. He explained the job they were preforming and kept me informed every step of the way. I truly recommend Next Level Insulation."
+33
Serving Rancho Cucamonga, CA and surrounding areas
Approved
In business since 2019
Free estimates
Credit card accepted
"Miguel, with Alpha Insulation, was fantastic to work with. Excellent communication, quality work, and fair prices! Would definitely recommend. If you have any insulation needs, Alpha Insulation is the company to call!"
+46
Serving Rancho Cucamonga, CA and surrounding areas
Approved
In business since 2008
Free estimates
Warranties offered
"from dave the account manager to the nice insulation installers, a very nice experience."
+65
Serving Rancho Cucamonga, CA and surrounding areas
Approved (Corporate)
In business since 2000
Free estimates
Small jobs welcome
"Just an over all great job and a damn good price....can't wait for the rain to test them out...LOL"
+1
Serving Rancho Cucamonga, CA and surrounding areas
Approved
In business since 2025
Free estimates
Small jobs welcome
"Geovany and his team did an amazing job at my house cleaning attic removing all debris lid insulation, sanitizing and air sealing attic, installing new insulation and radiant barrier. Job was done in a clean and professional manner. Team was polite and professional. I would recommend Fibers Insulation to anyone looking to upgrade or replace their insulation or just looking to add radiant barrier to their attic for a cooler more energy efficient home."
Serving Rancho Cucamonga, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2003
Free estimates
Emergency services offered
"The work was completed sooner than promised. I am very satisfied with this company and the work that they completed. They gave me a 50 year warranty for my shingle roof and replaced all the insulation in my attic. Thank you atom builders."
+3
Serving Rancho Cucamonga, CA and surrounding areas
Approved
In business since 2023
Free estimates
Emergency services offered
"We completed our roofing project with Atom Builders and I can saw I am happy with the outcome. The project managers Jake and Tony were great. They said they will take care of everything and they really did."
+1
Serving Rancho Cucamonga, CA and surrounding areas
Approved
In business since 1997
Free estimates
Credit card accepted
We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. With over 20 years of experience in the roofing and general construction, our roofing team can quickly identify roofing issues to repair. As with all of our services, we guarantee our work and promise to repair the issue the right way the first time, every time. We look forward to earning your business!
From average costs to expert advice, get all the answers you need to get your job done.
Insulating your attic can improve your home’s efficiency and reduce electric bills. Use this guide to find out what attic insulation will cost you in Los Angeles, CA.
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Use this DIY checklist for insulation repair to make your living space more comfortable and reduce your heating and cooling bills in the process.
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