Spray Foam Insulation in San Diego, CA

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

Compare 31 verified spray foam insulation contractors serving San Diego, California, backed by 645 customer reviews averaging 5.0★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened San Diego 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 San Diego

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 San Diego

5⭐
117 Google reviews

Recent Reviews:

Keren WuRohe★★★★★3 weeks ago

Attic Heroes put insulation in my attic, and I had them come back about a year later to encapsulate my crawl space. They were communicative, they offered a very reasonable price relative to some other quotes I got, and they did solid work. I recommend them for both attic and crawlspace work! I'll also say that compared to some other companies I got quotes from, they were far less pushy and salesy. I had a different company make it seem like my whole house was about to come apart at the seams if I didn't sign up for all their (very overpriced) services, but Attic Heroes did none of that. Their pricing and recommendations seemed very practical and fair.

Pat Werkmeister★★★★★4 weeks ago

Attic Heroes installed insulation, a vent smart fan, and replaced air ducts, all at a great price. The technicians were fast and clean up was excellent. Fidel even replaced my attic lid which was previously damaged. In all, the service was great!

Sarah Latimer★★★★★3 weeks ago

Attic Heroes was great to work with. The employees took care every step of the way and show great pride in their work. From the first meeting with the knowledgeable sales person to the respectful and meticulous cleaners/installers, I couldn't be more happy. The price was reasonable and the work was executed quickly!

5⭐
141 Google reviews

Recent Reviews:

Peter Tao★★★★★a week ago

Had my blown- in cellulose attic insulation done by Advanced Insulation System. Victor and Tiger did a really great job. They took special care to keep my house clean by laying paper runners and hanging plastic sheeting. Everything was explained well and Victor showed me the final result which looked great and was professionally done. Looking forward to enjoying a warmer and cooler house. I would recommend this company.

Amanda Summersby Gois★★★★★3 weeks ago

Advanced insulation system did an amazing job. The staff were punctual, kind, respectful and considerate. There was a tiny hole in our ceiling and an employee (I wish I remembered his name - Marco?) repaired it for us. Victor and Tiger are amazing workers, worked so hard and very respectful- I would recommend this company to anyone and everyone. The staff are incredible and the final job was perfect. Thank you.

Michael Stuckenschneider★★★★★4 months ago

Hunberto, Juan, & Eddie were great. They kept the job site tidy and did high quality drywall on my old, 1950 plaster home. Will definitely go back if I have future insulation/drywall needs.

Recent Reviews:

Mathew Chumba★★★★★3 months ago

They were friendly,efficient and did an outstanding job

Mercy Clare★★★★★3 months ago

Excellent services👌🏻highly recommended

Emanuel Charity★★★★★2 weeks ago

We hired High Performance Attic Insulation after our HVAC contractor said our system was struggling due to poor attic conditions. The difference their work made is astonishing. They didn't just add insulation; they performed a comprehensive air seal, installed a radiant barrier, and upgraded our ventilation to modern standards. The crew was incredibly professional and meticulous. Our home now reaches and maintains the desired temperature effortlessly, and our energy bills have dropped significantly. This is true high-performance work.

5⭐
7 Google reviews

Recent Reviews:

Debrah Moraa★★★★★3 months ago

There can never be a second impression for the first.Their services are just welcoming! Thumbs up.

Bonface Oyagi★★★★★3 months ago

It’s refreshing to find a service that’s both affordable and excellent. I’ll be using them again.

tilewa Timileyin★★★★★5 months ago

5⭐
4 Google reviews

Recent Reviews:

Miranda Roger★★★★★2 weeks ago

I am thoroughly impressed with the quality of work and customer care. San Diego Thermal Insulation provided a customized solution for our complex attic with multiple roof levels. Their crew was skilled, patient, and ensured every cavity and eave was properly insulated and sealed. The before-and-after difference is night and day. Our home retains warmth on cool nights and resists heat during the day far more effectively. A trustworthy and highly skilled company.

Whitney Alexandra★★★★★2 weeks ago

Outstanding service from a company that truly understands San Diego's unique temperature swings. From the initial consultation, their knowledge of both coastal and inland microclimates was evident. They provided a clear, fair plan and executed it flawlessly. The installation team was punctual, respectful, and their workmanship is top-notch. Our home is now consistently comfortable day and night, and we've already noticed a decrease in our cooling costs. Highly recommend this knowledgeable local team.

Chaim Dustin★★★★★2 weeks ago

We contacted San Diego Thermal Insulation to address the intense heat gain in our east-facing rooms, and the results have been phenomenal. Their team provided a tailored solution that combined radiant barrier installation in the attic with upgraded ventilation. The crew was professional, efficient, and left the worksite impeccably clean. The difference is immediate and dramatic; our home now stays cool much longer into the afternoon, and our air conditioner finally gets a rest. Perfectly suited for our local climate.

5⭐
29 Google reviews

Recent Reviews:

Christina May★★★★★3 years ago

Happy I called this company. So helpful and knowledgeable. They were able to answer all my questions and worries. You should try them out.

Brett Burns★★★★★3 years ago

Great company and I couldn’t give enough praise for the job well done. They were very helpful along every step of the way. Give these guys a shot you won’t be disappointed.

John Orth★★★★★3 years ago

Though i don't know much about this company what i do know is that in my dealings with them so far they have been great. Very personal, very helpful and seem to aim to get the job done correctly the first time.

5⭐
6 Google reviews

Recent Reviews:

Lisa Benjamin★★★★★3 months ago

I was inspired by trusted San Diego insulation company they are the best team I have ever worked with. I recommend

Quadri Mesioye★★★★★6 months ago

San Diego is a trusted roofing company. I got more than the service I paid for

graham emmanuel★★★★★3 months ago

Recent Reviews:

Isabella Mitchel★★★★★6 months ago

Briones Maggie★★★★★2 weeks ago

We hired Thermal Nest to solve the constant battle with temperature in our older San Diego home. Their approach was incredibly thorough—they didn't just add insulation, but performed a complete assessment that included air sealing and evaluating our attic ventilation. The crew was professional, efficient, and left the worksite immaculate. The difference is remarkable; our home now maintains a consistent, comfortable temperature naturally, with far less reliance on the HVAC system. They truly built us a better thermal nest.

Patterson Kierra★★★★★2 weeks ago

I am thoroughly impressed with the quality of work and customer care. Thermal Nest provided a comprehensive plan for our new construction project, ensuring it was optimized for efficiency from the start. Their crew was skilled, coordinated seamlessly with our builder, and their attention to detail was exceptional. The home performs beautifully, staying comfortable with minimal energy use. This proactive approach gave us incredible peace of mind. A trustworthy and forward-thinking company.

5⭐
31 Google reviews

Recent Reviews:

JOSEPH ROSART★★★★★3 years ago

They were prompt and were professional! Job was done fast and accurately to my needs! Would recommend them to anyone. Thanks again guys for the awesome job!

Reyes Maldonado★★★★★3 years ago

Definitely recommend! Great customer service and quality work. All done in a timely manner. Thank you !

Joseph Tarpy★★★★★3 years ago

Great experience! Hands down i'd give these guy's 10 stars if it was possible! They were fast and reasonable. Answered all my questions and i had a lot! I'd recommend them to anyone needing insulation

Recent Reviews:

Victor Chukwuka★★★★★6 months ago

I had Quiet Home Insulation upgrade the insulation in my attic, and the difference is amazing. The house is quieter and holds temperature way better now. The team was on time, professional, and cleaned up after themselves. Definitely worth it—highly recommend if you're in San Diego.

Emmanuel Emmanson★★★★★6 months ago

I’m really impressed with the quality. Hands down one of the best insulation homes there is.

Boomtheo Boomwicked★★★★★6 months ago

Good home service

Recent Reviews:

Timi Timi★★★★★6 months ago

Fast, clean, and super professional. You can tell they know what they’re doing. Definitely recommending them to friends.

Anthony Buco★★★★★7 months ago

Chana Hampton★★★★★2 weeks ago

We reached out to Thermal Nest after struggling for years with a perpetually hot second story in our Simi Valley home. Their assessment was incredibly thorough, and they proposed a solution that combined radiant barrier installation with enhanced attic ventilation and air sealing. The crew was professional, efficient, and left the worksite spotless. The difference is absolutely remarkable; our home now maintains a consistent, comfortable temperature throughout. They truly built us a better thermal nest.

5⭐
38 Google reviews

Recent Reviews:

Alice Chen★★★★★3 months ago

I highly recommend Phoenix Insulation! I got my attic cleaned, rodent proofed, and insulated with Phoenix Insulation. Raphael provided me with a competitive quote and kindly walked me through the process, answering all my questions. On the day of, the crew arrived on time. The crew leader Jorge was very professional, friendly and accommodating. There was an accidental crack in the drywall during the process, but Raphael and Jorge made sure to get it addressed and fixed as if it never happened. When they were done, Jorge made sure to double check all the electric outlets. They did a great job with the attic insulation and I appreciated their communication.

Paul Mays★★★★★3 months ago

Phoenix Insulation removed the old insulation from my attic and replaced it with new, energy-efficient material. Their pricing was very reasonable compared to other quotes I received, and the estimate they gave was exactly what I paid—no hidden costs. The team arrived on time, worked quickly, and left everything spotless. They made sure the attic was properly sealed, and I immediately noticed how much cooler and more comfortable my house felt. I’m confident my energy bills will improve as well. What I really appreciated was that the project stayed affordable without cutting corners on quality. They gave me peace of mind, a cleaner attic, and a more comfortable home. I’d definitely call them again.

Foster Buck★★★★★a month ago

I work in construction and have tried multiple insulation companies, but Phoenix Insulation truly stands out. They show up prepared, finish on schedule, and never cut corners. My clients have noticed the energy savings, which makes me look good too. Definitely a long-term partnership for my projects.

5⭐
77 Google reviews

Recent Reviews:

Ting Chorng★★★★★6 months ago

I had Ram Insulation help with my attached garage project. They showed up on time with three-man crew and completed my 20' by 20' garage insulation within a day. They have done very nice and detail-oriented work and my garage looks brand new and ready for the next step.

Alaine de Leon★★★★★3 months ago

Miguel and his team were referred to us by our HVAC vendor. We had them remove and replace the insulation in our home. Miguel, Adolfo and the crew were punctual and professional throughout the project. The entire project took 3 days and they did a great job of prepping our home, covering areas to protect and keep clean, removing the old insulation, and cleaning out any remaining debris before installing the new material. Adolfo took the time to explain what would happen during each part of the process including what things I can expect from having the work done. They were also good about the cleanup work when they finished. I already notice the difference in how much the new insulation is helping block out the heat inside my home. Hard working and dedicated crew. Would highly recommend using RAM for your home insulation needs.

LJ★★★★★4 months ago

Miguel’s team, Hector and Alfonso did an outstanding job of insulating our attic. They came bright and early and blew in insulation as well as laid rolls of insulation throughout our space. They were professional and courteous. They even had to deal with sharing space with a painting crew that was at our house to finish up a project. Super good folks and the insulation project was priced very competitively. Give Miguel a chance to bid for your business. You won’t regret it.

Recent Reviews:

Abdulkadir Muhammad★★★★★4 months ago

I enjoyed using it,it has no issues,I will give it 10 stars

Fagbola Oluwatoni★★★★★6 months ago

The best ever, try it out and see

Alex Smith★★★★★6 months ago

Great service!

Recent Reviews:

Clifford Kirui★★★★★4 months ago

The service was top notch. They offered great quality and detailing.

Joshua oluwakayode★★★★★6 months ago

Asmodeus★★★★★6 months ago

5⭐
32 Google reviews

Recent Reviews:

Joshua Hoopingarner★★★★★4 months ago

I’ve used several contractors and can tell you personally that these guys are the BEST! Hands down.

Eddie Rodriguez★★★★★2 years ago

Great work, Great Staff , And very honest People. Would Recommend and use again.

julien★★★★★3 years ago

Great company and they got the job done in a short period of time! Would recommend!

Recent Reviews:

Oswaldo Raphael★★★★★2 weeks ago

I am thoroughly impressed with the quality of work and customer care. Thermal Nest Insulation provided a tailored solution for our home with a complex, low-clearance attic. Their crew was skilled, patient, and ensured every single cavity was properly insulated and sealed. The before-and-after difference is night and day. Our home now retains warmth on cooler evenings and resists the daytime heat far more effectively. A trustworthy and highly skilled local company in Santa Ana.

Malcolm Ryker★★★★★2 weeks ago

Choosing Thermal Nest was one of the best investments we've made. The entire process was seamless, with excellent communication from start to finish. They addressed both our attic and crawl space with impressive professionalism. The crew worked diligently, protected our property, and cleaned up perfectly. The improvement in our daily comfort and the home's overall energy efficiency is significant. We finally have the consistent, cozy ""nest"" we wanted for our family

Ari Gavin★★★★★2 weeks ago

Outstanding service from a company that truly understands the needs of Santa Ana homeowners. From the initial consultation, their knowledge of how heat builds in our valley was evident. They provided a clear, fair plan and executed it flawlessly. The installation team was punctual, respectful, and their workmanship is top-notch. Our home is now consistently comfortable year-round, and we've already seen a positive impact on our energy bills. Highly recommend this knowledgeable and professional team.

Recent Reviews:

Chris Emenaka★★★★★6 months ago

Great service

ADVISORY AGENCY★★★★★6 months ago

Incredible

David Mondragon★★★★★6 months ago

Recent Reviews:

Jenny Yaritza★★★★★2 weeks ago

I am thoroughly impressed with the quality and customer care. Thermal Nest Insulation provided a tailored solution for our older home with a complex roofline. Their crew was skilled, patient, and ensured every nook and cranny was properly insulated and sealed. The before-and-after difference is remarkable. Our home now retains warmth on cooler nights and resists the daytime heat far more effectively. A trustworthy and highly skilled local company in Anaheim.

Mollie Barbara★★★★★2 weeks ago

We hired Thermal Nest Insulation to tackle the extreme heat in our Anaheim home, and the results have been incredible. Their team provided a comprehensive solution that included installing a radiant barrier in our attic, upgrading our insulation, and improving ventilation. The crew was professional, efficient, and left the worksite perfectly clean. The difference is night and day; our home stays cooler longer, and our air conditioner isn't constantly struggling. A perfect solution for the local climate.

Alma Miya★★★★★2 weeks ago

Choosing Thermal Nest was one of the best investments we've made. The entire process was seamless, with excellent communication from start to finish. They addressed both our attic and crawl space with impressive professionalism. The crew worked diligently, protected our property, and cleaned up perfectly. The improvement in our daily comfort and the home's overall energy efficiency is significant. We finally have the consistent, cozy ""nest"" we wanted.

5⭐
102 Google reviews

Recent Reviews:

onis alba vega★★★★★a year ago

Ron did an amazing job cleaning out our crawl space and installing a new moisture barrier. He was extremely knowledgeable, walking us through the importance of keeping the space dry and free from pests. Now, our crawl space is clean and protected, and I feel much better about the air quality in our home. Highly recommend Ron for crawl space work!

Bessy Zelaya★★★★★a year ago

For a long time, we paid little attention to our crawl space, but the accumulation of moisture began to impact our house. Leo and his crew performed an excellent task of clearing it out, sealing it properly, and adding insulation. They guided us through each phase and highlighted spots we hadn’t thought about. The air quality in our home has improved, and I feel assured that we have prevented potential issues. The dedication and professionalism of the team were remarkable. It’s a tremendous comfort to realize our crawl space is now well-maintained!

Naty Hernandez★★★★★a year ago

I was dealing with moisture and damaged insulation in my crawl space, and this company did an amazing job. Leo installed a vapor barrier, replaced the insulation, and ensured everything was dry and clean. The team explained every step and worked quickly but thoroughly. Now, my crawl space is well-protected, and I couldn’t be happier with their service!

Frequently Asked Questions — Spray Foam Insulation in San Diego

These are the questions San Diego 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 31 verified San Diego contractors above for exact quotes.

Does spray foam insulation work well in hot dry climates like San Diego?▼
Yes — spray foam is highly effective in hot dry climates like San Diego, 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 San Diego?▼
In hot dry climates like San Diego, 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 San Diego, CA?▼
In San Diego, 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 San Diego costs $2,000–$6,000. Most San Diego 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 San Diego, CA?▼
When searching for a spray foam contractor in San Diego, 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 San Diego 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 San Diego 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.