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Top-Rated Insulation pros in Thermal - Updated Nov 2026

Avatar for Phoenix Insulation Inc.
Phoenix Insulation Inc.
5.0(
1
)
Spray Foam Insulation - Install

Serving Thermal, 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
13 neighbors recently requested a quote
Attic and Basement Experts Inc
New to Angi
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Thermal, CA and surrounding areas

Approved

In business since 2013

Free estimates

Small jobs welcome

We are a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 11 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

4 neighbors recently requested a quote
Avatar for Evergreen Air Duct Cleaning
Evergreen Air Duct Cleaning
4.9(
27
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Thermal, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Adam and his team of workers gave me a great deal on replacing the insulation in the attic. We had a leak in one of the fire alarm sprinklers that caused the insulation to be bad and smelly. 
We spoke to Adam about the problem and he sent his employee (Luis) to come over and check the problem in order to provide us  with a quote.
The quote that Adam was able to give us was very good and we approved the work. He than sent 2 workers to do the job and it was done in 2 days after they had to clean everything in the attic and to try it before they placed the new insulation.


"
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+58

Recommended by94%of homeowners
Fibers Insulation
5.0(
3
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install

Serving Thermal, CA and surrounding areas

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."
Avatar for Evergreen Air Duct Cleaning
Evergreen Air Duct Cleaning
5.0(
28
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Thermal, CA and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"Excellent service and good people to work with! Adam was very generous to us when we contact the office and asked for their help with the problem at our house. The insulation had to be replaced based on an inspector requirements. 
The replacement work took 3 days in a row and the workers did a good job. we will hire them in the future.
"
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+2

Recommended by95%of homeowners
Avatar for Landmark Energy Upgrades
Landmark Energy Upgrades
4.8(
59
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Thermal, CA and surrounding areas

In business since 2009

Free estimates

Emergency services offered

"We have a 1970's and we decided to have an energy audit by Landmark Construction. It was clear that our house have some energy issues and was in need of a any type of energy overhaul.  The report that was prepared for us by Charlie and his office staff, was comprehensive, clear to understand and revealed that the ducts at the attic  was not sized appropriately. In addition to that, the furnace/AC in the smaller unit was old (and original) and had to be replaced. The recommendations that Charlie told us, included a new furnace/AC, new tankless water system, hot water pipe insulation, building sealing, the insulation and new ducting throughout the house. This was the best investment we ever made.  I could not believe the difference in our utilities bill.  Charlie and his team were great,  professional and experienced. I wish we did these 15 years ago!!
"
Cool Roof Install
Energy Upgrade
HVAC Air Duct
Home Energy Audit
Energy Upgrade Contractors

+6

Recommended by98%of homeowners
Avatar for Mega Power Electric, Inc
Mega Power Electric, Inc
5.0(
191
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Thermal, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"We recently had Mega Power Electric Inc install a solar system and panels. The President and provided excellent communication all the way through the process. He even met with us after installation to explain the almost incomprehensible PG&E bill. Although not the least expensive bid, his was competitive and I felt he was as interested in educating me about solar and the various types of panels and inverter systems as he was in selling a system. He demonstrated how the array of panels would meet our energy needs and as opposed to some of the other companies, wasn't selling us more than we needed. We are very satisfied with our solar system and I highly recommended Mega Power Electric Inc."
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+32

Recommended by100%of homeowners
Avatar for Green Attic Pros
Green Attic Pros
5.0(
13
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Thermal, CA and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"The price was fair, the work was completed in one day and included removing all our old insulation, cleaning the ductwork, installing new R-35 batting, and an attic fan, and two ultraviolet lights in our HVAC units. I am very pleased with their responsiveness, and with the quality of the work completed. I would definitely hire them again - highly recommended!"
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+166

Recommended by100%of homeowners
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Insulation FAQs, answered by experts

Glass fibers are often used in HEPA filters because of their high efficiency, durability, and thermal stability. Some HEPA filters are made with synthetic fibers, but they may not be as effective. While there is some fiberglass shedding, as long as the HEPA filter is intact and not cut open, the amount of fiberglass released by a HEPA filter is well below the breathable particulate matter.

Winterizing your outdoor plumbing keeps your outdoor spigot from freezing and potentially bursting. This includes draining residual water out of the pipe and spigot after turning the valve off, then removing garden hoses and other attachments from the spigot before winter comes. Insulating the pipe that leads to the spigot and installing a freeze-proof faucet also help, as does installing an outdoor faucet protector.

You’ve likely heard the saying “heat rises”—well, it’s true! This is why it is critical to properly insulate your attic and protect yourself from chilly winter nights. During summer, your attic insulation will also protect against excessive heat gain radiating through the ceiling into the rest of your home below.

Spray foam insulation can last between 80 and 100 years, depending on the type. Closed-cell spray foam is more durable, while open-cell foam is more susceptible to moisture damage and deterioration. It's important to consult a professional installer to understand which type of foam will be used and its specific longevity. Additionally, be aware that some spray foams can damage plastic piping, so if you have PVC or CPVC pipes, discuss this with your installer.

DIY installation is not recommended, as professionals ensure even distribution, proper sealing, and compliance with building codes.

The Thermal, CA homeowners’ guide to insulation services

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