Guardian Insulation

4.55 |73 Verified Ratings
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Guardian Insulation

4.55 | 73 Verified Ratings
Write a Review


24194 Hollyoak APT G
Aliso Viejo, CA 92656
Your use of our services is governed by our Terms & Conditions

Guardian Insulation

Shielding Your Home and Saving You Money

Guardian Insulation is a fully licensed, bonded and insured insulation and acoustical contractor specializing in blown insulation for single family residences. Our managing partners are experts in energy efficiency and thermal resistance combining not only a Bachelor's Degree in Environmental Science from UC Berkeley but over 25 years on site experience with residential home insulation. We have over 100 satisfied customers in the Orange County and Sacramento areas, many of whom would be happy to speak to you and attest to the quality of our work.


Learn how HomeAdvisor screens and approves their pros.

Service Area

  • Anaheim
  • Irvine
  • Santa Ana
  • Orange
  • Fullerton
  • Laguna Beach
  • Garden Grove
  • Newport Beach
  • Huntington Beach
  • Mission Viejo
  • Buena Park
  • San Juan Capistrano
  • Laguna Hills
  • La Habra
  • Tustin
  • Brea
  • Lake Forest
  • Costa Mesa
  • Aliso Viejo
  • Westminster
  • Laguna Woods
  • San Clemente
  • Fountain Valley
  • El Toro
  • Yorba Linda
  • Los Alamitos
  • Placentia
  • Cypress
  • Dana Point
  • Trabuco Canyon
  • Villa Park
  • Laguna Niguel
  • Rancho Santa Margarita
  • Seal Beach
  • La Palma
  • Atwood
  • Foothill Ranch
  • Newport Coast
  • Stanton
  • Corona del Mar
  • Midway City
  • Capistrano Beach
  • Ladera Ranch
  • East Irvine
  • Surfside
  • Silverado
  • Sunset Beach
  • See All >

Services Offered

  • Batt, Rolled or Reflective Insulation Install
  • Blown-in Insulation Install

Areas of Expertise

  • Insulation & Air Sealing
  • Whole House Fans & Attic Ventilation
  • Air Sealing
  • Solar Panels
  • Wall Insulation with Full Restoration

Product Brands Used

  • Green Fiber Cellulose Insulation

Quick Facts

Business Hours
(Please call to confirm)
  • Free Estimates
  • Credit Cards Accepted


In Business Since: 2003
State Licensing
Trade: C-02 Insulation and Acoustical
License #: 981000
Expiration: 02-28-2019
Trade: B-General Building Contractor
License #: 981000
Expiration: 02-28-2019
Green Certifications
  • Building Performance Institute - Building Analyst & Envelope Profesisonal Certifications
  • 4.5 Stars & 28 Reviews On Yelp!
  • "A" Rating & 15 Reviews On Angie's List
  • Angie's List Super Service Award 2016
HomeAdvisor Screened. View Details

HomeAdvisor allows Service Professionals to post information about themselves and their business on their profile. HomeAdvisor does not review or verify the information or representations set forth in those profiles, as they are self-reported by the Service Professional.

HomeAdvisor verifies state-level licensing where applicable - note: some states require local or county level licensing and you should verify whether or not your pro is properly licensed.

Business Overview

Community Involvement

Habitat for Humanity


Guardian Insulation

My Work
1 Projects
Save 10% on Any services totalling $1500 or more Save 10%
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Ratings & Reviews
Guardian Insulation

Real feedback from real homeowners.
Learn more about this pro by reading the ratings and reviews below.
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Showing 1-10 of 73
  Page 1 of 8
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3.0   |  
The actual installers were great! They came on time, knew what they were doing, were clean, neat and considerate. On the other hand, the sales person was not as interested if the job he was selling could actually be completed as sold. Therefore, a part of the job could not be completed and he attempted and attempted to put the ownous on the client.
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4.5   |  
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5.0   |  
Review by in Lakewood, CA
David is very pleasant, and his customer service is great. Very affordable and detailed.
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5.0   |  
The 2 person crew was awesome. They were very respectful and personable. They came ready to work and did an amazing job. The patchwork on the holes they used to blow the material in was superb. You can't even tell there were puncture holes. All around a painless experience.
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5.0   |  
Review by in Rialto, CA
Guardian Insulation was all you could ask for as a customer - 1) They offered the best quote/estimate out of three 2)They were in constant communication from start to finish 3) They showed up on time and completed the work in a timely manner 4) The quality of work and products were excellent
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4.5   |  
Review by in Pasadena, CA
From the sales rep, to the workers, (family)--strictly professional! Done on time with courtesy & proficiency. Filled my walls and refilled my attic, and the touch up after the holes were plugged-- artists!! My thanks and appreciation! Larry G.
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4.0   |  
I was pleased with the quote however I was given a date for the work to be done and it was not done scheduling error so they did it the next date and reduced my rate which was appreciated the work was done.I can tell the difference in my house. But when the work was done I paid cash and was not given a receipt which concerned my so I texted the owner and he emailed me one. Other than that I was really pleased with the service.
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5.0   |  
Very professional and honest. Did a great job of cleaning up and repairing the holes in the walls that was needed to add insulation for me. I have had a great experience! And my homes temp dropped by 7 degrees. AWESOME.
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0.5   |  07-17-2017
I was mislead regarding the rebates from Guardian Insulation. two projects were needed in order to obtain rebate. Each project is separate and this was not required for the rebate from SMUD. Each project is entitled it's own rebate per SMUD. Once deposit was received, communication rated at 0 star. There were 6 no shows where I waited at home with no phone call or text. Company offered several hundred dollar discount if given a positive review online. It makes you wonder if their high star rating is due to this "buying stars". Guardian Insulation became argumentative when I requested my deposit back 3 weeks later. Company will text you at 3 in the morning which also included for me to remove my negative posting online NEWSFLASH I had not posted a review . This put a thought in my mind which led me to write this review...... I highly recommend NOT using this company unless you prefer to sit around and wait.
Response by Guardian Insulation: Sh wasn't misled regarding rebates. 2 components are required, not 2 projects. Her project had 4 components. We were having personnel issues at the time & suggested if she was in a rush she work with another company. She insisted that she was willing to be patient. She called us 3 days later insisting that her work be started in 2 days. We said we would do the best we could and called her several times following day to let her know the soonest we could get her on the schedule was the following week. She refused to answer her phone and her voicemail was full. She then complained about our "poor communication" Draw your own conclusions.
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4.0   |  
Review by in Torrance, CA
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Showing 1-10 of 73
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