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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

"Everguard Home Insulation was excellent from start to finish. They provided a competitive quote and followed through with timely, efficient, quality work installing attic insulation. Highly recommend for your next home improvement project"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+7

Response time2 days
18 neighbors recently requested a quote
Recommended by96%of homeowners
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

69 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
542 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

"We are extremely pleased with Eli and the entire ELM team! We needed to remove and replace attic insulation after the Eaton fire and our location blocks from the canyon. Eli outlined the scope of work and answered all our questions. Alex and his crew did a very professional job of completing the difficult work efficiently and as planned. Miriam was a pleasure to work with in scheduling the work and coordinating payment. And the cost was a real value! Thank you very much for your expertise, quality work and excellent customer service. Richard H."
Wall insulation
Insulation
Insulation
Insulation
Air Sealing

+29

Response time5 hrs
Response rate98%
17 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%
102 neighbors recently requested a quote
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Insulation FAQs, answered by experts

Yes, crawl space insulation is worth it if installed correctly. Installing insulation in your crawl space will improve the air quality, help stabilize your home's temperature, lower your energy bills, and prevent pests from entering your home. Though you’ll pay more to install insulation initially, the savings you get from installing insulation can help offset those initial costs over time.

The primary reason that insulation saves you money over time is that it reduces your energy bills by making your home more energy efficient. A crucial part of an insulation system is a properly installed vapor barrier. Local building codes dictate whether your insulation requires a vapor barrier based on the type installed. While some high-quality wool insulation may not technically need a vapor barrier, most municipalities still require one to meet code.

STC (Sound Transmission Class) is a rating that describes how well a building material or assembly blocks airborne sound. A higher STC rating means less noise will pass through the material, providing better sound reduction. This rating system applies to various building components, including windows, doors, flooring, drywall, and insulation.

For context, a typical single-pane window has an STC rating of around 25 (where normal conversations are audible), while a well-sealed, double-pane window can exceed STC 45 (blocking loud speech and most music). It is important to note that for some products, like soundproofing drywall, the STC rating refers to the entire wall system, not just the individual panel.

Additionally, STC ratings are most effective for measuring sound reduction at mid-to-high frequencies, such as human speech, and may not accurately reflect how well a material blocks low-frequency sounds like bass music or thunder. Because of these factors, it is recommended to consult a professional to determine the right STC-rated materials for your specific soundproofing needs.

Blown-in insulation works, but only for unfinished attics. Also, it isn’t the longest-lasting nor the most effective option. For better options, look into spray foam insulation or natural fiber batts. They typically have a longer lifespan, better heat resistance, and stronger sound-proof abilities. Spray foam insulation costs about $1.25 to $1.50 per square foot, but can go up to more than $4 per square foot. Fiber batt pricing varies depending on the material.

There are many reasons one bedroom may be hotter than the rest of the house. The sun will quickly heat a south-facing bedroom with a large window, especially if it lacks quality curtains. If the room has poor insulation, this could let more warm outside air in. Upstairs bedrooms are often hotter than ground-floor rooms because heat rises. Finally, rooms further away from the air conditioning unit may heat up a lot if the system is not properly balanced.

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.