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  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon90
    Verified insulation services reviews

Top-Rated Insulation pros in El Cajon - Updated Nov 2026

Avatar for Ecotech Pro Inc
Ecotech Pro Inc
5.0(
17
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving El Cajon, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Yes. Billy said everyone was great on install date. Omar was helpful and communicated effectively. Team worked well together and were efficient. Team was respectful of our property and cleaned up after work done. All of the team members being available was excellent to get install in one day. We hopefully will enjoy the benefits of the insulation and all went as anticipated with install. Very glad we had it done. Leo was excellent with pre install quote and arranging for install. We got a few quotes . We paid highest quote to have the work done quickly which met our needs. Thank you for the excellent service"
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
New Attic blow-in insulation.
Heating and Air Conditioning Project

+55

Response time1 day
Response rate100%
27 neighbors recently requested a quote
Avatar for Attic Professional
Attic Professional
5.0(
8
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving El Cajon, CA and surrounding areas

Approved

In business since 2022

Free estimates

Warranties offered

"Great quality work, paid attention to every detail; from laying down plastic to corner guards to cleaning up every last piece of insulation on the ground outside. The owner and his crew, who were his father and family friends were very professional and kind. The best owner and operator business that I would recommend to the next person in line."
Response time1 day
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for California Attic & Build Corp.
California Attic & Build Corp.
4.6(
19
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving El Cajon, CA and surrounding areas

Approved

In business since 2021

Free estimates

Warranties offered

"I had a fantastic experience with California Attic and Build! From start to finish, Dan and Ben were incredibly professional, knowledgeable, and attentive to my needs. They took the time to explain the entire process and made sure everything was done to the highest standard. The quality of their work exceeded my expectations, and their friendly attitude made the project enjoyable. I highly recommend California Attic and Build, especially if you get the chance to work with Dan and Ben—they truly go above and beyond!"
My jobs
My jobs
My jobs
My jobs
Response time1 day
Response rate96%
138 neighbors recently requested a quote
Avatar for Phoenix Insulation Inc.
Phoenix Insulation Inc.
5.0(
1
)
Spray Foam Insulation - Install

Serving El Cajon, CA and surrounding areas

Approved

In business since 2020

Free estimates

Credit card accepted

"I was very satisfied on efficiency these guys were working on my home ! Making my home feel like home again ! I’ll recommend them again 🫶and very affordable btw! thanks to them it saved me a lot of money ! Phoenix insulation is the best ! Thank you !"
Gallery
12 neighbors recently requested a quote
Avatar for Attic Construction, Inc.
Attic Construction, Inc.
4.3(
82
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving El Cajon, CA and surrounding areas

In business since 2013

Free estimates

Credit card accepted

"Tyler asked questions and listened to our answers to help us choose the insulation options that made sense for our home. The 3 workers prepared the area to protect our floors and doorways from any damage before they started work. Everyone was professional. Even though they put in a long day everything was cleaned up thoroughly before they left."
Before, Middle, After
Before
Removing Debris and Batt Insulation
During Vacuuming
During Vacuuming

+9

Response time4 hrs
Response rate85%
Recommended by90%of homeowners
Avatar for ASI Plumbing, Heating & Air
ASI Plumbing, Heating & Air
4.6(
989
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving El Cajon, CA and surrounding areas

In business since 1952

Free estimates

Emergency services offered

"After calling to request an energy audit and enhanced attic insulation, a representative came out to survey the site and prepare a proposal to replace heating ducts in the attic with R6 ducts, seal the attic from the house, and add 14? blown-in fiber insulation on top of the existing 8? of fiberglass insulation. 
Then a technician came out to do a safety inspection of the heating system, hot water system, fireplace, gas appliances, ventilation, ducting, etc. He completed a series of tests to measure how well the house was sealed before any work was done. He took pictures of everything.
Then a team came out and replaced the ducts, sealed the attic, built dams around the bathroom ventilation fan and the whole house fan, installed channels for the eave vents, and prepared to install new insulation. One of the techs accidentally miss-stepped and cracked the ceiling drywall (see: What surprises come up during the course of the work?), which prevented them from finishing the insulation install until after the ceiling was repaired, which they would do at no cost to me. 
A drywall tech came out to repair the ceiling and resurface the popcorn ceiling.
The install team came back out to complete the insulation install. They blew-in another 14 to 16 inches of fiber insulation on top of the ceiling joists pre-existing fiberglass insulation. They took pictures of everything.
The original technician returned to repeat the seal tests and take more photos. The test results, before and after, and all the photos would be submitted for a state energy efficiency program rebate.
I called about a month later to check on the status of the rebate, and was told that the state requested that the ventilation fan dam be upgraded. A technician returned to complete the upgrade and take additional photos to submit to the rebate program.
I received a $1300 rebate from a state energy efficiency program, reducing the cost to $700 to me."
Drain Clearing Special Only $57
At ASI, The White Glove Guys, we specialize in providing unmatched AC maintenance service. We have a dedicated team that provides prompt and professional AC Tune-ups, repairs, and other services. Our expertly trained AC technicians can improve the efficiency of your AC to ensure solid performance all year round.
ASI Heating is just a call away. We can ensure your air conditioner is up and running perfectly within no time. Call us if you find some performance issues with your AC unit.
Furnace Repair Solutions in San Diego, CA
At ASI Hastings, we place a lot of importance on customer satisfaction. We want to make sure your home or business remains warm and comfortable right through the winter season. If you are experiencing problems with your furnace, don’t hesitate to call us. Schedule an appointment now.
Schedule Your Air Conditioner Services Today!

Our certified White Glove technicians are trained in residential servicing, repairing, and installing of every type of air conditioner ever made!

Evenings and Weekends – Never an Extra Charge!

+7

Recommended by90%of homeowners
Avatar for Green Faith Attic Solutions
Green Faith Attic Solutions
4.9(
50
)
Blown-In Insulation - Install or Upgrade

Serving El Cajon, CA and surrounding areas

In business since 2019

Free estimates

Warranties offered

"Excellent experience from initial estimate till project finished. Great people to work with. Reasonable prices. So reasonable I asked them to insulate garage, which was never done."
Response time1 day
Response rate92%
Recommended by93%of homeowners
Showing 1-10 of 39
Insulation FAQs, answered by experts

Yes, covering exposed wires is necessary for several important reasons. Exposed electrical wires pose significant risks, such as electrical shocks, fires, short circuits, and potential damage to your home’s electrical system. By properly insulating and protecting the wires, you can minimize the potential for accidents, prevent electrical fires, and ensure your electrical system stays intact. 

Mineral wool wraps are the most affordable and effective insulation for crawl space ducts. They are easy to cut, last for a long time, and healthier for humans. Meanwhile, fiberglass wraps are cheaper but more hazardous and difficult to handle. If you do choose to use a fiberglass wrap, make sure you are wearing long sleeves and wear proper protective gear.

For standard 2x4 walls, the ideal insulation has an R-value between R-13 and R-15. This level of insulation, typically around 3.5 inches thick, fits well within the wall cavity. Common options include fiberglass batts and spray foam. The best choice for your home can depend on your climate; use R-value maps, like those from Energy Star, to determine the recommended level for your region. For colder climates, you might also consider adding exterior insulation for greater efficiency. Always check with your local building codes to ensure you meet any required standards.

In some cases, yes, insulating an unheated garage can lead to mold and mildew. The issue with insulating a garage is that the interior will warm up and cool down more slowly than the exterior air, which can cause condensation inside the space. Where there is moisture, there is likely to be mold and mildew over time. Installing a vapor barrier can help avoid moisture and mildew problems in an insulated garage.

A DIY blown-in insulation project in a typical attic should take you no more than a week to complete. Experienced homeowners can blow an entire attic in one or two days.

The El Cajon, CA homeowners’ guide to insulation services

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