Spray Foam Insulation in Union City, CA

Find top-rated spray foam contractors and save up to 27% on energy bills

Compare 7 verified spray foam insulation contractors serving Union City, California, backed by 521 customer reviews averaging 4.8★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened Union City contractors handle both open-cell and closed-cell spray foam. Homeowners here typically cut energy bills by around 27% — get free quotes and read verified reviews below.

💰 Estimated Energy Savings in Union City

27%
Average Energy Savings
Typical range: 22% - 32%
$1,134
Estimated Annual Savings
Based on $350/month average energy cost
5 years
Average Payback Period
Return on investment timeline

Note: Actual savings vary based on home size, current insulation, energy rates, and climate conditions. These estimates are based on Department of Energy data for Hot-Dry.

Verified Contractors in Union City

5⭐
57 Google reviews

Recent Reviews:

Pulkita Aggarwal★★★★★4 months ago

Jorge and team were exceptional to work with. The removed our old insulation, sealed the attic and added new fiberglass insulation, explained each and every step and went great lengths to do rodent proofing. And all it took was few hours. Jorge also came few months later to fix some of the gaps that the HVAC crew left in our attic. I highly recommend Ideal Attic for your insulation needs. Their price was the lowest as well among all other quotes.

Charlotte★★★★★a week ago

I feel very fortunate to have found Ideal Attic Insulation to work on the attic and crawlspace of our newly purchased home. From the start, Jorge came to provide a free inspection, and he was extremely professional and thorough. He personally went into the attic and crawled into the crawlspace to check every detail. After his inspection, he gave us a very fair estimate with a clearly written and complete scope of work. We also requested quotes from other companies, but it became clear that Ideal Attic Insulation—and especially Jorge—was the most professional, responsible, and knowledgeable. Jorge even helped us connect with other reliable handymen for additional repairs we needed around the house, which we truly appreciated. Once our plumbing repairs were completed, we scheduled the attic and crawlspace work. Jorge’s team handled the attic cleaning, sealing, rodent-proofing and new insulation installation. In the crawlspace, they performed a full cleaning, rodent-proofing, and installed a new vapor barrier. The scheduling was quick, and everything was completed within three days. The workmanship was excellent—clean, organized, and very professional. We really trust Jorge and appreciate his honesty, experience, and dedication. I highly recommend Ideal Attic Insulation to anyone looking for attic or crawlspace services. We will definitely continue using this company in the future. Highly recommended!

Tony & Diana Andrade★★★★★2 months ago

Jorge is the best. My wife and I had contacted 4 companies, and by far Ideal Attic Insulation was the winner. With us it wasn't all about price, but quality, knowledge of the trade and experience. We had our old insulation removed when we replaced our roof. Yes, like lot of us when your roof is compromised you have issues with rodents. Once our roof was completed, we set our appointment with Jorge. He came out the following afternoon, and boy was it hot. He inspected our entire attic and came up with a game plan to vacuum and sanitizing our entire attic space. He took a lot of pictures and shared areas of concern with us. We had the roofer's comeback out and tighten up area that may have been able to be compromised. once these areas were tightened up Jorge sent out his crew to install mess wire and stray foam around vent pipes, etc. Jorges recommended we wait a few weeks to install the insulation to see if there were any signs of rodents. After a few weeks and weekly inspections by Jorge and his crew, there were no signs of pests. They installed the insulation, and we could not be happier. We highly recommend Ideal Attic Insulation. Don't waste your time looking for other insulation companies call ideal Attic Insulation and know you made the right decision.

5⭐
60 Google reviews

Recent Reviews:

Elle Xie★★★★★a month ago

Idan does not disappoint! This is our second time using his services, and this time I went straight to him without even shopping around. His team is responsive, efficient, and highly professional. A major bonus is their expertise with home insurance systems, which made that part of the process effortless for us. Later, despite a dispute over the scope of work (which was due to a miscommunication, not his fault), he stood by his word and honored his promises, even when it resulted in a significant financial loss for him. His integrity, particularly in that situation, is truly commendable!

Anton Keilin★★★★★4 months ago

After experiencing a roof leak that led to multiple issues, I interviewed several companies before ultimately choosing Leader Restoration, and I’m so glad I did. From start to finish, the process was smooth and professional. I worked closely with project manager Idan, who was knowledgeable, responsive, and easy to work with. Leader Restoration handled everything seamlessly—including coordinating with my hygienist for the final mold inspection, which we passed on the first try. Their expertise in mold remediation and dedication to quality restoration services truly stood out. I couldn’t be happier with the results and highly recommend them to anyone facing water or mold issues.

Tyler Barros★★★★★4 months ago

We discovered mold during our home remodel and contacted Leader Restoration. Idan, the project manager, was incredibly professional, and Julio, the lead technician, did excellent work. The mold remediation process was smooth, the price was competitive, and we got clearance in less than a week. Highly recommend them for reliable mold removal and restoration services!

5⭐
31 Google reviews

Recent Reviews:

Michael Davey★★★★★5 months ago

Great company Highly recommended 5 star….

Lawrence Erbe★★★★★6 months ago

Responded very quickly and very professional fantastic job

GERRIT KELDER★★★★★7 months ago

Great , would recommend !

5⭐
38 Google reviews

Recent Reviews:

Tony Truong★★★★★a year ago

I contacted 911 Attic Insulation after reading great reviews about them, and this company exceeded my expectations in every way. The reviews I read were all true, and the service provided was outstanding from start to finish. I called the company and thoroughly discussed the attic inspection with Nick, who arrived the next day to conduct it. Nick patiently answered all my questions and provided me with a detailed quote before the end of the business day. My attic was in dire need of attention, with old insulation that needed to be replaced, debris scattered all over the attic, and rat droppings. It was also located under the lowest attic imaginable. Due to unforeseen roofing and electrical work that suddenly became a priority, the one-day job for 911 insulation turned into a two-day job, which I requested. I paid the extra fee to return at a later date so that I could have other services being worked on. Overall, I am extremely satisfied with the service provided by 911 Insulation, and I would highly recommend this company to my family and friends. Now, let's talk about Nick. Nick was my point of contact throughout the entire process, and he kept me informed every step of the way. I didn't have to contact him for anything, as he always reached out to me. I even joked around, saying that if all my home services needs had Nick as the point of contact, renovating the house would be a breeze. Thank you, Nick and team, for the excellent service!

Chip C★★★★★2 years ago

I had an attic with insulation in desperate need of repair/replacement. On top of that, we also had a rodent problem that we needed cleared up. In hindsight, we probably had the insulation and duct issues *because* of the rodent problem. After calling around for a few quotes, I found the team at 911 Attic. When they came out to give a quote, they were prompt, polite, took time to put shoe covers on, and never once tried to upsell things we didn’t need. They did mention a couple things we could add if we wanted to, but I never felt pressured. Even the way they provided the quote was more professional than I expected (itemized quote that allowed me to electronically review/approve). Then came the day of the job. It was scheduled to begin between 8 and 9, and being used to other types of companies being late (cable companies, I’m looking at you), I was expecting them closer to 9 or 10. I was happily surprised when a crew of four guys arrived at 8:15. They started putting down drop cloths and taped the job so that it reminded me of a professional house painters. They worked all the way through, with only a couple minutes off to grab some water, until the job was done. I checked out the job when everything was wrapped up and I couldn’t have been happier with the results. Not only do I have new ducts, new insulation, and fewer rodents (no rodents), I now have a place that I can use as storage that I wasn’t able to before. I would highly recommend the professionals at 911 Attic.

Bryan Holst★★★★★a week ago

Daniel and his team did a very thorough job and left everything extremely clean. They were competitively priced and I would recommend them to friends and family without reservation.

4.9⭐
298 Google reviews

Recent Reviews:

Rowena Blankenhorn★★★★★3 weeks ago

Amilcar did a great job handling the project of my home placing a French drain. He communicated well what needed to be done, got the work done on time as stated & overall professional.

Xuan Guo★★★★★a month ago

Attics Pro responded very quickly. Wais Amiry carried out the inspection and answered all of my questions. The project was scheduled promptly, and there were enough workers on site. What was originally a five-day job was completed in four days. The site was kept very clean, and communication throughout the process was smooth. I am very satisfied with both the quality of the work and the price.

Jerry Anderson★★★★★a week ago

We went with Remove, Seal, Sanitize old insulation in effort to identify if there was a Termite swarm. We figured we’d need one day for termite inspection and a separate day for a termite treatment. The day after Attic Pros we had Bongiorno termite inspection come out and he went into the attic and there was no swarm identifiable all clean. Attic Pros did the complete removal and everything was visible and clean. It was cold at night and we didn’t wanna wait for our pre-scheduled couple of days out so I contacted Attic Pros and they came out the next day. Three guys installedR38. Bats without paper backer minimizing mold- they did an excellent job. All of our light was sealed. The hatch got new layer of bubble wrap insulation. The Attic vents had chutes installed allowing fresh air interchange. Can feel the difference- absolutely a warmer house. Thank you Attic Pros. Also Attic Prod had low cost to many other HVAC companies that just farm it out to subcontractors. Highly recommend Attic Pros.

4.8⭐
31 Google reviews

Recent Reviews:

Jack Richmond★★★★★4 months ago

This company has great tenacity and work ethic I would 100% refer someone to their services as they are the best in the industry. Don’t look any further, go with Eagle Insulation they will take care of you.

Dean Michael Rossi★★★★★5 months ago

The very best experience, friendly staff , excellent service,highly recommend.

Jacob Gibbs★★★★★5 months ago

Thank you the insulation is amazing great job guys

4.2⭐
6 Google reviews

Recent Reviews:

Sumeet Khandelwal★★★★★a year ago

This company did the insulation for our home last year. During the inspection, they pointed out that the bathroom vent was leaking in the attic. They fixed the leak and did great job on installation. Insulation was also rebated by PGE with tax deduction on co-pay. Our heating bill went down. Definitely recommend this company.

Hitesh Shah★★★★★3 years ago

Elite Energy installed attack insulation in my home. They are highly professional and have provided outstanding service. Staff is very courteous and did through job. They even checked all the appliances for gas leaks and burn quality. I highly recommend Elite Energy Efficiency for insulation and other services they offer.

Eddie Carmona★★★★★3 years ago

Awesome work!! Super friendly crew!! Would definitely recommend to ALL friends and family!! No hiccups throughout the entire service!!! 10/10 in my book!!

Frequently Asked Questions — Spray Foam Insulation in Union City

These are the questions Union City homeowners ask most about spray foam cost, R-value, and open- vs. closed-cell foam — with context for local pricing and roughly 27% typical energy savings. Compare the 7 verified Union City contractors above for exact quotes.

Does spray foam insulation work well in hot dry climates like Union City?▼
Yes — spray foam is highly effective in hot dry climates like Union City, CA. While moisture control is less of a concern than in humid climates, the air sealing properties are critical for keeping hot desert air out and cooled air in. In extreme heat climates, an unsealed attic can reach 150°F+, dramatically increasing AC load. Spray foam in the attic can reduce attic temperatures by 30–40°F.
What is the best area of my home to insulate in Union City?▼
In hot dry climates like Union City, CA, the attic is typically the highest-impact area to spray foam insulate. Desert sun heats roofs to extreme temperatures, and an uninsulated attic transfers that heat directly into your living space. After the attic, crawl spaces and rim joists are the next highest-impact areas. A local contractor can perform an energy audit to identify where your home loses the most conditioned air.
Is spray foam insulation worth the cost?▼
For most homeowners, yes. Spray foam creates an air-tight seal that traditional insulation cannot match, reducing energy bills by 15–35% annually. It also adds structural rigidity, acts as a moisture and vapor barrier, reduces outside noise, and can increase home resale value. The higher upfront cost compared to fiberglass is typically recovered within 3–7 years. One important note: because spray foam creates a very tight building envelope, proper mechanical ventilation is important to maintain healthy indoor air quality and prevent interior moisture buildup. This is typically handled by an Energy Recovery Ventilator (ERV) — a system that brings fresh outside air in while pushing stale air out, recovering the energy from the outgoing air so you don't waste what you paid to heat or cool — or a Heat Recovery Ventilator (HRV), which works similarly but is optimized for cold climates. A qualified contractor will assess whether your home needs ventilation upgrades as part of the installation.
How much does spray foam insulation cost in Union City, CA?▼
In Union City, CA and the surrounding area, spray foam insulation typically costs $1.00–$3.00 per square foot installed, depending on the type and your home's specifics. Open-cell foam runs $0.44–$0.65 per board foot, while closed-cell foam costs $1.00–$2.00 per board foot. A typical 2,000 sq ft home attic in Union City costs $2,000–$6,000. Most Union City homeowners recoup this investment within 3–7 years through energy savings of 15–35% annually.
What is the difference between open-cell and closed-cell spray foam?▼
Open-cell spray foam is softer, less dense, and less expensive. It expands significantly and is ideal for interior walls, attics, and soundproofing. Closed-cell spray foam is denser, stronger, and provides a moisture barrier — making it better for exterior applications, crawl spaces, and areas prone to flooding or humidity. Closed-cell also has a higher R-value per inch (R-6 to R-7 vs R-3.5 to R-4 for open-cell). One key difference: open-cell foam allows some vapor movement, while closed-cell acts as a vapor barrier — an important consideration for your home's ventilation needs.
How long does spray foam insulation last?▼
Spray foam insulation is one of the most durable insulation options available, with a lifespan of 80+ years when properly installed. Unlike fiberglass batting which can sag and settle over time, spray foam maintains its shape and insulating properties indefinitely. It will typically outlast the building it is installed in.
How do I find a qualified spray foam insulation contractor in Union City, CA?▼
When searching for a spray foam contractor in Union City, CA, look for ones who are licensed, insured, and have verifiable reviews. Spray foam requires specialized equipment and training — improper installation can cause off-gassing, adhesion failure, or fire hazards. Ask for references, verify their insurance, and get at least 2–3 quotes. A qualified Union City contractor will also assess your home's ventilation needs — a tightly sealed spray foam installation requires adequate mechanical ventilation to prevent moisture and indoor air quality issues. FoamMatch pre-screens all listed contractors in Union City for licensing and insurance so you can compare verified professionals in your area.
How long does spray foam installation take?▼
Most residential spray foam jobs take 1–2 days depending on the size of the area. A standard attic takes 4–8 hours. After spraying, the foam cures within 24 hours, though most contractors recommend waiting 24–72 hours before occupying the space due to off-gassing during the curing process.
Does spray foam insulation need to be replaced?▼
No — spray foam insulation does not need to be replaced under normal circumstances. Unlike fiberglass insulation which degrades over time, spray foam maintains its R-value and air sealing properties for the life of the building. The only reasons to remove or replace spray foam are water damage, renovation work, or improper original installation.