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TRUSTED BY SIGNAL HILL, CA HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon54
    Verified insulation services reviews

Top-Rated Insulation pros in Signal Hill - Updated Nov 2026

Avatar for Everguard Home Insulation Inc.
Everguard Home Insulation Inc.
4.8(
199
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving Signal Hill, CA and surrounding areas

Approved

In business since 1959

Free estimates

Emergency services offered

"It is rare these days to find a great company with good values. This is one of those instances; I cannot say enough, good things about the professionalism of the employees at the office and those that showed up on site to install wall insulation. They showed up at the beginning of the two hour window, which was fantastic and explained everything with upfront pricing. We even asked for additional insulation and they were able to accommodate. Our home walls are now insulated and we even noticed a difference right away. From the time of arrival to completion they were nothing but exemplary. Thanks again for running an honest and professional team! Highly recommend to anyone out there looking to insulate your home!!! Notability, they were well below other companies on pricing too!!!"
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+7

Response time2 days
14 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Insulation Labs
Insulation Labs
4.9(
519
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install

Serving Signal Hill, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Warranties offered

"In July 2024 I hired Insulation Labs to add more insulation to our attic. They showed up on time with a truck full of insulation, and a few hours later they had put all of it inside our attic. They did a good job up there. I am very pleased with how everything turned out. One thing that distinguished Insulation Labs from some other outfits is that they did not try to up-sell us with services we didnâ t need."
Fresh Insulation & New Ducts
Completed installation of solar panels
Roofing Projects
Spray foam insulation Projects
Old Insulation & Debris

+121

Response time11 hrs
Response rate90%
38 neighbors recently requested a quote
Avatar for Marathon Insulation
Marathon Insulation
5.0(
16
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeInjection Insulation - Install+2 more

Serving Signal Hill, CA and surrounding areas

Approved

In business since 2022

Free estimates

Credit card accepted

"After talking with several attic clean out and insulation, wall insulation companies, I decided to go with Marathon Insulation. Johnathan was very helpful and professional, gave the best choices for my issues, without trying to upsell like some of the others. After getting the attic and walls insulated (with attic clean out) I can already feel the heat stay in the rooms much longer and the walls much less cold to the touch before. I highly recommend Marathon Insulation! They were always on time, delivered as promised, and cleaned up after."
Exterior wall drill fill
Newly constructed pool house ready for insulation
Exterior wall drill fill
Pool house insulated with brand new batt insulation
Exterior wall drill fill

+23

Response time7 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Insulation Nation, LLC
Insulation Nation, LLC
5.0(
7
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install

Serving Signal Hill, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"We had Insulation Nation (Dustin) come to our house to look at our attis insulation; our house was built in the late 70's and I had added more blown-in insulation many years ago. We decided on adding 8" of blown-in insulation to reduce our heating/cooling cost and to reduce the cycling of our HVAC system. They did a wonderful job of sealing any attic leaks, covers for our canned lighting fixtures, built a dam around our whole house fan, added baffles around our soffits, and added the insulation. Nicely done and a professional job. Would recommend using their service."
Air Seal (Mineral wool light covers) and Batt - R38 Attic
Vaulted/Cathedral Ceiling - R43 Combo of RIgid Foam Board and Batt
Same
Full Removal, Radiant Barrier and Replacment
Batt Insulation In Attic Perpendicular Layered

+33

52 neighbors recently requested a quote
Recommended by14%of homeowners
Avatar for Insulation Commandos of Southern California
Insulation Commandos of Southern California
4.2(
417
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or UpgradeSpray Foam Insulation - Install+1 more

Serving Signal Hill, CA and surrounding areas

Approved

In business since 2018

Free estimates

Emergency services offered

"After having a new air conditioning system installed, to replace an old inefficient one, we decided to make sure our attic had the correct insulation as well as the appropriate R-value. Since our home was built in the 1950's, the insulation throughout the attic was minimal. We hired Insulation Commandos to survey and provide us with the appropriate solution. The solution involved removal of the old insulation, cleaning the area, and installing the correct insulation based on our homes location. We now believe we can keep our energy costs down and provide less strain on our AC system. Great job team!"
before and aftert insulation install
insulation remocal service
about us
Wrapped trucks
507 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for ELM Insulation & Sound Solutions
ELM Insulation & Sound Solutions
5.0(
11
)
Batt, Rolled or Reflective Insulation - Install or UpgradeBlown-In Insulation - Install or Upgrade

Serving Signal Hill, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Emergency services offered

"Me and my husband live in a condo in Los Angeles. About 6 months ago the neighbors upstairs rented their condo. The new neighbors are a family with two kids who are very sweet, but like to wake up early and throw stuff on each other. (At least thatâ s what itâ s sounds likeâ ¦) we talked to a few different contractors, most have offered us to inject insulation to the ceiling. We tried it, as it was not expensive, but, this did almost nothing. My husband who has very light sleep kept waking up every day at 5, what made our life very difficult. We did some due diligence and realized we need a much serious approach. When we talked to Eli at ELM, we understood right away thisbis the right contractor for us. His level of knowledge exceeded everyone else's, and he was wiling to make everything as clear as possible for us. The price wasnâ t cheap, as the construction included demo, installation of many materials and even lowering the ceiling. The project took about 2 weeks and we could see the difference right away. We could barely hear any thing!! What a huge difference! The crew were cleaning after every day of work and were very professional. I highly recommend ELM (make sure Eli is meeting youâ ¦.) for every Sound Proofing project. Thank you Eli (and pedro!)"
Wall insulation
Insulation
Insulation
Insulation
Air Sealing

+29

Response time5 hrs
Response rate98%
18 neighbors recently requested a quote
Avatar for Attic Construction OC, Inc.
Attic Construction OC, Inc.
4.4(
85
)
Blown-In Insulation - Install or UpgradeBatt, Rolled or Reflective Insulation - Install or Upgrade

Serving Signal Hill, CA and surrounding areas

Approved

In business since 2013

Free estimates

Credit card accepted

"The upfront explanation and advice were very honest and the work done was superb. The work was planned to be done in one day which they did including all the cleanup. I will recommend them to anyone needed insulation work in the attic."
Before
Clean
Insulated
Attic Restoration
Attic Restoration

+17

Response time5 hrs
Response rate93%
87 neighbors recently requested a quote
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Insulation FAQs, answered by experts

R-30 insulation is better for higher thermal resistance, but whether it’s "better" depends on the application. R-30 is much thicker and suited for areas like attics or floors in cold climates, where more insulation is required. R-13, on the other hand, is thinner and works well for 2x4 walls or milder climates where less insulation is sufficient. Choosing between R-13 and R-30 depends on the area being insulated and the climate. For example, R-30 provides more insulation but may not fit everywhere in your home.

Insulating your basement walls offers numerous advantages that make the project well worth it. By adding insulation, you can reduce the chances of moisture damage to the house's structure and lower the odds of mold growth. You'll also add comfort to the space by reducing temperature swings and increasing your home's energy efficiency, potentially reducing your energy bills to earn your investment back.

The best type of insulation for your home depends on your specific needs, climate, and the area you are insulating. For new construction, structural insulated panels are a highly energy-efficient option that is easy to install during the building process. In very warm climates, reflective insulation can be a cost-effective choice. For cold climates, fiberglass is an excellent option due to its high R-value and resistance to settling over time. Spray foam works well in humid environments because of its moisture-resistant properties. For standard attics, loose-fill, spray foam, or blown-in insulation are all suitable options.

Spray foam insulation doesn’t do well around heat sources. Therefore, You can use spray foam insulation to seal around HVAC boots that penetrate through the drywalls or around where wrapped ducts connect to the boots, but we don’t recommend using spray foam insulation to encapsulate your air ducts. Spray foam insulation on air ducts is also less effective compared to duct wraps.

Reduces energy costs, improves comfort, and prevents ice dams in winter.

The Signal Hill, CA homeowners’ guide to insulation services

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