Spray Foam Insulation in San Jose, CA

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

Compare 13 verified spray foam insulation contractors serving San Jose, California, backed by 784 customer reviews averaging 4.9★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened San Jose 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 Jose

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 Jose

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
28 Google reviews

Recent Reviews:

Zarren Swan★★★★★a week ago

Noble Insulation inc is a excellent company that offers the best Spray Foam Insulation service for your home and business.Their website is easy to navigate to get the service and contact info you will need.

Lindy Howard★★★★★a week ago

I felt really taken care of by Noble Insulation. They explained everything clearly, especially about Spray Foam Insulation. Honestly impressed with their service. Super friendly team, and I appreciated how patient they were.

Allyson Sides★★★★★2 months ago

Noble Insulation Inc exceeded expectations with their professional spray foam insulation services. Excellent energy efficiency, soundproofing, and seamless installation. Highly recommend their expertise and customer service.

5
2 Google reviews

Recent Reviews:

Leo Lopez★★★★★5 years ago

Amazing Company

Todd hoover★★★★★5 years ago

5
25 Google reviews

Recent Reviews:

Roxanne Cyr★★★★★4 months ago

Damian and his crew installed R-19 insulation under our house. They were quick and easy to work with. And even provided a couple of photos.

John McBrayne★★★★★4 months ago

The guys did a fantastic job removing all the old loose-fill insulation from my ~120 year old craftsman, including a big pile of old wood slats and other refuse from prior roofing jobs, and replaced it all with new blown-in insulation. They took care to put down plastic and tape before they started and cleaned up everything when it was all done. The house is noticeably more comfortable, and it was all for a very reasonable price. I should have done it years ago.

Rosa Zapien★★★★★a year ago

I just purchased my new home and noticed some rooms warmer/colder than others. Damian came and inspected our house. He pointed out the issues in our attic and provided his recommendation and a few options. We chose to remove the old insulation, and replace it with new. The two workers Abad and his helper were punctual, kind, and very respectful of our newly renovated home. I also really appreciated Damian’s follow up call. As I mentioned to him, we already feel a huge difference! I haven't been running our heater as much and I’m excited to see our PG&E bill go down. Thank you, Nor Cal!

5
2 Google reviews

Recent Reviews:

Norman Laping★★★★★a year ago

Awesome company! I called them today for the heating furnace repair that I need, and they fixed it effortlessly. The technician provided excellent customer service and the best repair. He was professional, skilled, and incredibly meticulous throughout the entire process. Thank you very much for your help! I will be calling you again someday! Keep up the good work, guys! Until next time!

Apple Mae Cabantac★★★★★a year ago

Amazing work! Torrance Cooling & Heating installed a new AC system in my home, and the results are fantastic. They were meticulous in their work, ensuring every component was properly installed and the system functioned efficiently. I’m very pleased with their service.

5
28 Google reviews

Recent Reviews:

Tom Hancock★★★★★2 years ago

Had a wonderful experience. The people there were so friendly I almost forgot I was in california.i will highly recommend this to anyone else that might be interested.

Andrea Chiribel★★★★★3 years ago

good work nice people.I would recommend this company

Felix Pasillas★★★★★3 years ago

Great customer service,Highly recommend this company for your needs.

Direct: (408) 981-5346

5
7 Google reviews

Recent Reviews:

Bobby O. Oneil★★★★★a year ago

Had Everlast Attic Insulation contractor insulate my attic, and I couldn't be happier with the results. Highly recommend their services!

Erik S. Humphrey★★★★★a year ago

Highly recommend Everlast Attic Insulation contractor for anyone looking to improve their home's energy efficiency. They deliver excellent results.

Arthur Berry★★★★★a year ago

Everlast Attic Insulation contractor's attention to detail and commitment to quality insulation work is commendable. Very satisfied with their service.

4.9
315 Google reviews

Recent Reviews:

Edu Carneiro★★★★★2 weeks ago

We had a mice issue in the basement + a few areas inside the house, and Attic Bros did a fantastic job cleaning up, blocking entrances, installing new insulation, and also fixing a damaged air duct. The team was certainly professional, and the price was reasonable for the quality.

Brian★★★★★4 weeks ago

Initial Review (and hopefully only review). I've evaluated four attic companies and ultimately selected Attic Bros. Here are my thoughts: Excellent service throughout the process. Ori did a great job addressing my concerns and gave a fair estimate for the project. He also did not upsell me on services that I didn't need. Note: Attic Bros aren't the cheapest service but they are also not the most expensive. Vic (project manager) did a phenomenal job in managing things and letting me know about the condition of my attic. His team did a thorough job pest proofing things and properly laid down R-38 batts.

Andrew Choy★★★★★3 weeks ago

I'm a repeat customer at Attic Bros, for two different scenarios: - Attic insulation x 2 - Whole house insulation Both times I shopped around and ended up going with Attic Bros based on customer ratings and competitive pricing. At this point, they will be my go-to for my insulation needs since both times the quality, service, and price have always won out. (My loyalty to them over 7 years has even been recognized) Moreover, even as difficult of a customer as I've been with multiple reschedules and multiple callbacks, they've always shown patience until I was ready. I don't usually like to write reviews out of the kindness of my own heart, but I felt that this company deserves it. Thanks for hanging tight with me and for all the help team - Ori, Justine, Jesus.

4.9
298 Google reviews

Recent Reviews:

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.

Janice Vroman★★★★★a week ago

I was able to self schedule an appointment within 2 days. Rabi was very professional and clearly communicated both the issue and the plan for resolution. They were able to complete the work within a few days. Their price was competitive. The team arrived between 10 am and worked all day to clean my attic, close all access points, and install the new insulation. They worked all day until 6 pm. They were very pleasant, answered my questions, explained things well. The process was pretty quiet so I was able to work at my remote job while they worked. They left everything clean in the crawlspace and took all garbage with them. I did not enjoy having creatures in the attic but they made the process of getting rid of them as pleasant as possible.

Nancy Sargent★★★★★2 weeks ago

This is an excellent Company: They are professional, caring and thorough in their work. They took before and after pictures which was a great help. They removed rats, mold, asbestos from the attic. They removed the installation and replaced it with new. They sealed areas where the rats could have entered. They set traps and so far no sign of rats. They left my house clean. I have confidently referred you to my neighbors. Thank you.

Recent Reviews:

Mariany L★★★★★a year ago

Tri county did wall insulation a few years ago, which made my home warmer in the winter. The wall also patched well after the blow in, even though it is outside wall. The price was the most reasonable one. One bonus I got is the worker patched the hole in attic for the rodent not to enter. I recommend this company for pricing, quality of job and service.

Marcia Ochoa★★★★★6 years ago

Excellent, professional, and very knowledgeable contractors and crew. I got multiple bids and Tri-County was competitive, but not the lowest. It was absolutely worth paying a few dollars more for the confidence and honesty I got with Tri-County. They scheduled my job realistically and worked with me when there were delays. In and out in a timely and reliable manner. Highest recommendation!

Karen Jew★★★★★5 years ago

We had insulation put in under the house and in the walls. It was a big project and took 2.5 days. These guys came in and were so professional, knowledgeable and respectful. They never complained even when presented with obstacles. Hands down some of the best people we’ve worked with during the last several years of renovations. They even took time out to chat with my nosy kids. My daughter loves to say that Pedro is her new friend! Thank you!!

Direct: (650) 535-1966

4.5
13 Google reviews

Recent Reviews:

Henry Ramirez★★★★★a year ago

Atticity remplaced my insulation 2 days ago at s San José did rodent prolfing and clean my crawl Spaces as Well I’m very happy with the servic thanks ro David team

Barak Tamam★★★★★a year ago

Atticity did great job at my house in Sunnyvale David came on time did an estimate for the attic and crawl space he was able to schedule the job pretty quick they removed the old insulation with all rats droppings seal all the attic and install radiant barrier my electricity bill was super high during the summer time I’m very happy with David’s team I will definitely recommend them to friends and family

tom roash★★★★★9 months ago

Atticity did very good job at my house in San Jose professional polite came on time they vacuum my old insulation in 4 hours and replace with rolll in insulation pink David was amazing answer all my questions A+

Frequently Asked Questions — Spray Foam Insulation in San Jose

These are the questions San Jose 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 13 verified San Jose contractors above for exact quotes.

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