Spray Foam Insulation in Walnut Creek, CA

Find top-rated spray foam contractors and save up to 35% on energy bills

Compare 10 verified spray foam insulation contractors serving Walnut Creek, California, backed by 1,544 customer reviews averaging 4.7★. Whether you're insulating a new build, retrofitting an existing home, or upgrading attic and crawl-space insulation, these pre-screened Walnut Creek contractors handle both open-cell and closed-cell spray foam. Homeowners here typically cut energy bills by around 35% — get free quotes and read verified reviews below.

💰 Spray Foam Savings Calculator for Walnut Creek

Homes in Walnut Creek typically cut energy use by 30%–40% with spray foam. Change the numbers below to fit your home.

Foam type
$1,596
Estimated annual savings
At about 35% off your energy bill
$5,100–$8,200
Rough install cost
Attic roofline, about 5.5" of open cell
3–5 years
Estimated payback
Install cost ÷ annual savings

These are estimates, not quotes. Actual savings vary based on home size, current insulation, energy rates, and climate conditions. Savings estimates are based on Department of Energy data for the Cold climate zone. Cost assumes the attic roofline (about 1.15× your home's square footage) at typical installed prices of $0.40–$0.65 per board foot for open cell and $1.00–$1.50 for closed cell; a two-story home has less roof and usually costs less. Get quotes from the contractors below for real prices.

Verified Contractors in Walnut Creek

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⭐
114 Google reviews

Recent Reviews:

Takahide Danny Sato★★★★★5 months ago

Excellent job, American Attics!! I have met several companies and American Attics was my choice. Mr. Sam Naib, the owner came to the site for detailed explanation and I felt confident that he will deliver what he has promised. On the day of the job, 3 young crew members showed up on time and worked tirelessly the entire time to complete the job on time. There was one minor issue they forgot to do but Sam arranged to fix it in a timely manner. I highly recommend Sam and his team to care for your precious home!!

Nadim Taraki★★★★★7 months ago

My old house was extremely inefficient, and after contacting several contractors, I found Sam from American Attics. He scheduled a free inspection and conducted a thorough assessment of my attic. What truly impressed me about Sam was his honesty, attention to detail, and deep knowledge of insulation and home efficiency. Sam and his team replaced the attic insulation, completed rodent proofing, and installed a brand-new air duct system. His crew was professional, hardworking, and respectful throughout the entire process. Just a couple of days after the job was done, I noticed a huge difference-my house feels incredibly comfortable now, and the airflow is much improved. I still can't believe the transformation! I wholeheartedly recommend American Attics for any home insulation, rodent control, or ductwork needs. Thank you, Sam and team, for the amazing work!

ahmad naibkhil★★★★★7 months ago

5 Stars – Excellent Experience with American Attics I recently had my attic insulated by American Attics, and I couldn’t be happier with the results. From start to finish, the entire experience was smooth and professional. Our home adviser, Sam, was fantastic—friendly, knowledgeable, and very thorough in explaining our options. He made sure we understood every step of the process and helped us feel confident in our decision. The installation crew was efficient, respectful of our space, and left everything clean once the job was done. We’ve already noticed a big improvement in comfort and energy efficiency. If you’re considering attic insulation, I highly recommend American Attics—and be sure to ask for Sam!

4.9⭐
550 Google reviews

Recent Reviews:

Udit Khanna★★★★★2 months ago

Highly recommend this company to anyone looking to have their attic cleaned up and re-insulated. We were dealing with HVAC running constantly and still unable to cool down the house effectively. Oumar visited for an initial inspection and came back with a bunch of photos from the attic. He walked us through all the various options we could benefit from, and left us with a competitive quote, without ever being pushy. On the day of service, Dani and his team were extremely professional in their job. They took care of a bunch of rodent mess in the attic and sealed a lot of rodent entry points. They took care of every small task I asked them to do, and left the whole house cleaner than they started with. Attaching some before and after photos for reference. Even though the HVAC still runs constantly, at least it is able to keep up with the heat and bring temperatures down. Just go for them!

Vijay Karthik★★★★★4 months ago

Attic Elite team has done a tremendous job at our place. Looking at the before and after picture clearly justifies the amount of effort they had to put in to get things done. They cleaned up the attic and crawl space really well and worked their way with ducts and insulation in the best possible manner. Omar is really helpful in understanding our needs and gave us the best estimate in market which we couldn't refuse. Highly recommend to consult the team for their best services.

DooYoung Jung★★★★★2 months ago

We hired Attic Elite to clean and rodent-proof our church attic, and overall we are very pleased with the experience. Although the crew arrived later than expected, they stayed until the job was done and made sure everything was completed properly. Our attic had been in poor condition for a long time—it was very dirty, dusty, and there were several openings that needed to be sealed. The team worked hard despite the difficult environment. They cleaned thoroughly, removed all the mess, and sealed the holes with care to ensure rodents won’t be able to get back in. It was not an easy project, but they handled it professionally and left the attic in excellent shape. Now our church can use the space with peace of mind, and we really appreciate their effort and attention to detail. Thank you, Attic Elite, for helping us restore and protect our church attic!

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.

4.8⭐
42 Google reviews

Recent Reviews:

Anne Birdseye★★★★★2 years ago

We discovered a bad rodent infestation in the crawl space and attic area of our new home. As a result, all insulation required removal and replacement. SDI held our hand thru the entire process. They provided 3 bid options, took care to ensure we understood each package/scope, and came out to meet with us for accuracy. Once the project commenced, SDI was professional, punctual and incredibly efficient. The team would provide regular updates. We felt very well cared for and important as their client. It can be hard and stressful finding reliable and trustworthy vendors that aren’t over charging and/or cutting corners. Do your project right the first time with SDI. We had an amazing experience. Highly recommend!

Mark Howser★★★★★2 years ago

I've used SDI Insulation on 3 of my projects throughout the years... they never disappoint! They're always on time, their work is superb and have never failed an inspection for their insulation work. I'm in the custom home building industry and it's hard to find a reliable and professional insulation company in the Bay Area. You get what you pay for and SDI is my go to company for quality insulation work. I definitely recommend these guys!

Kathleen Willis★★★★★9 years ago

Excellent job from start to finish. Our project manager, Dennis, did an excellent job addressing our concerns relative to noise and draft. We followed his advice and are completely satisfied with the results. The installation team consisted of 3 very capable and delightful young men who did a terrific job. The guys worked together very well, and they were polite and professional. The supervisor arrived to put the finishing touches on the job and the fellows cleaned up beautifully. I highly recommend SDI!

4.8⭐
30 Google reviews

Recent Reviews:

Tony Mathew★★★★★a year ago

Insul-Techs were hired to insulate my house. The scope of work involved insulating my walls, attic, and crawl space. The team installed different R value fiberglass insulation in the attic, walls, and crawlspace. They also installed spray foam insulation in one of my vaulted ceilings as shown in the pictures. I also got my garage walls insulated so that I can use that as a gym year round. They did an amazing job and after they were done with the insulation, we felt the difference on how cooler the house felt even when it was really hot outside Chris helped us with the scheduling and was a delight to work with. They are a hard working team who catered to all our requests and did everything to ensure we were satisfied with the job before they were done. Thank you Insul-Techs!

Kk★★★★★6 months ago

I was referred to insultech from a respected contractor. Luis came by for an estimate. During the inspection i was given options on the types of insulation and the insulation factor of each method. After further review of other insulation companies non were as professional in explaining the process or the materials used, and most of all they were much more expensive for the same work being chosen. The techs came in completed the job with the utmost respect for property. Communication with Luis and the front office was effortless and the response was done in a timely fashion. The insulation factor coupled with the mini split for cooling. What a difference. Customer satisfaction comes first. Great job InsulTech.

Jazmin Padilla★★★★★2 months ago

I recently had Insult Techs replace the insulation in my home, and they did a phenomenal job! The difference it made was immediate and noticeable. Their customer service was excellent from start to finish, and their pricing was very competitive compared to other companies I looked at. Luis and his crew were professional, efficient, and respectful throughout the entire process. It was truly a great experience, and I highly recommend Insult Techs to anyone needing insulation work done.

4.8⭐
367 Google reviews

Recent Reviews:

Soren Patel★★★★★a month ago

I recently had Atticare come out to clean and insulate both my attic and crawlspace, and I can’t say enough good things about the experience! Sean was my technician — super friendly, on time, and clearly knew his stuff. He showed me photos before and after, explained everything in plain English, and made sure I understood exactly what was being done.

Jimmy Galeota★★★★★in the last week

I recently had Atticare come out to my house last year to remove old insulation and then lay down new insulation along with rodent proofing the attic. A little over a year later Rats were still getting into my Attic and even though my warranty had expired Attic care was nice enough to send out their engineer Kyle to address the issue. Kyle spent several hours at my house today to do a thorough inspection and rodent proofing of any access areas were the rats might be getting into my attic. Kyle also repaired my air ducts the rats were chewing, cleaned up the attic of any droppings and completely sanitized. Very happy with the follow up work Kyle was able to complete today.

Patrick R★★★★★2 months ago

I recently used Atticare for my home in Pasadena, and I can honestly say it was one of the best home service experiences I’ve ever had. The team showed up right on time, explained the process in detail, and got to work right away. They removed the old insulation, cleaned and sanitized the attic, and installed fresh insulation that made my home feel instantly more comfortable. What impressed me most was how thorough and professional they were. They didn’t just do the job—they also sealed entry points and made sure my attic was protected for the long term. It’s such a relief to know my home is cleaner, safer, and more energy efficient. I highly recommend Atticare 5 stars all the way!

4.8⭐
41 Google reviews

Recent Reviews:

Kari Farinas★★★★★5 months ago

My husband and I are impressed with their responsiveness to all my questions and quality of their work. We did not have insulation in the house and needed it installed asap in our exterior walls due to miserable overheating in the house. They took good precautions to cover the floors and furniture, took their time to do the job right, finished everything in the estimated time frame, and took care when cleaning up. They just left and we already feel the difference in temperature. We are very happy and totally recommend this company!

Kapil Mullapudi★★★★★3 months ago

Excellent work by Miquan and his team! They completed attic insulation, spray foam for my loft, and full duct replacement. Miquan was very knowledgeable, took time to explain what my house needed, and was always prompt with responses. The team was extremely professional throughout the project - respectful of my home, arrived on time, and maintained a clean work area. They actually finished the job ahead of the promised timeline, which was a pleasant surprise. Quality workmanship throughout and I’m already seeing improved comfort and energy efficiency. Highly recommend for insulation and ductwork services.

Varun Nagaraja★★★★★3 years ago

I had a great experience working with Johnson's insulation. They cleaned out our dusty attic, sealed all the air gaps, covered up areas to prevent pests and finally install the insulation. They were also very clean while working by covering up the walls and hallway .

4.8⭐
32 Google reviews

Recent Reviews:

Darwin Carranza★★★★★4 months ago

Installation of attic insulation was one of the best things we did for our home. Crew was respectful, very skilled and walked me through how it will save on energy costs. Immediate difference in comfort.

Diana Mendoza★★★★★3 months ago

The group was outstanding! After inspecting my attic, they took out the old insulation and expertly placed the new material. In order to stop air leakage, they even sealed tiny openings. Excellent experience from beginning to end; I heartily endorse their offerings!

karina Alexandra Ortiz Izaguirre★★★★★4 months ago

Getting the attic insulated was one of the best home upgrades I’ve done. The house stays warm without blasting the heater, and the energy bill dropped noticeably within weeks.

2.8⭐
13 Google reviews

Recent Reviews:

St. Andrew Society★★★★★8 months ago

I too had a skylight leak 3 & 1/2 years after my roof was done. They fixed it. For the people who need theirs done just keep calling - they will schedule you. It is like anything these days - just follow up and it will get done. The guys who came out where super respectful and it took all of 5 minutes to have the repair done. The foam keeps our house 15 degrees cooler in the summer and the same with the heat - lots of $ saved there!!

Rob Hardy★a year ago

American Foam Experts re-did my roof in summer of 2021. As part of the roof work, they replaced two double-bubble skylights. One of those skylights has significant cracking throughout the interior bubble (to the point where pieces are falling into the house). In June, they stated they would order a replacement and have it installed before end of October. Today (middle of November) they informed me they've changed their stance to this issue being caused by debris or tree limbs. The interior bubble has significant damage where there is no damage to the exterior bubble, and we have no trees anywhere near the rooftop. I now feel compelled to pursue remediation via CSLB and arbitration. Throughout the entire process I have had to follow up multiple times with no response, had to re-share my contract multiple times (apparently they don't keep records), and generally had a terrible experience. I would not recommend working with AFE if it can at all be avoided.

Leah Jewett★a year ago

American Foam Experts, a company we went with because it was recommended to us, never finished the job we paid them for. Also: 1) With the skylights, they put in the wrong size and left the wood unstained and unvarnished. 2) They left masking tape up at our clerestory windows, one of which is broken (they agreed to pay for it but never did). 3) They left an inch or two of what looks like fake snow visible from all of our living-room windows because they never tapered off the foam. We paid American Foam Experts close to $30,000 in September 2023. Between October 2023 and May 2024 we called and emailed them to ask them to finish the job. One person said they would organize it, but we never heard anything more. The worst thing is that American Foam Experts never came back to complete the work we paid them for and then stopped answering calls and emails from us, from our property managers and from the realtor who was selling our house and who explained that the unfinished job would have to be part of the disclosure agreement. They never replied. Make sure that this company has completed any job for you before you make a final payment.

Frequently Asked Questions — Spray Foam Insulation in Walnut Creek

These are the questions Walnut Creek homeowners ask most about spray foam cost, R-value, and open- vs. closed-cell foam — with context for local pricing and roughly 35% typical energy savings. Compare the 10 verified Walnut Creek contractors above for exact quotes.

How much can spray foam insulation save on heating and cooling bills in Walnut Creek?▼
Homeowners in mixed climates like Walnut Creek, CA typically see 20–30% reductions in total energy costs after spray foam installation. The savings come from both reduced heating in winter and reduced cooling in summer. The exact savings depend on your home's current insulation, size, and local energy rates, but most homeowners recoup the investment within 3–6 years.
Is spray foam better than fiberglass insulation for homes in Walnut Creek?▼
For most homes in Walnut Creek, CA, spray foam outperforms fiberglass significantly. Fiberglass batts insulate but do not air seal — meaning conditioned air still escapes through gaps. Spray foam both insulates and creates an airtight seal, addressing the root cause of energy loss. While spray foam costs more upfront, the performance difference in mixed climates makes it the better long-term investment for most homeowners.
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 Walnut Creek, CA?▼
In Walnut Creek, 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 Walnut Creek costs $2,000–$6,000. Most Walnut Creek 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 Walnut Creek, CA?▼
When searching for a spray foam contractor in Walnut Creek, 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 Walnut Creek 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 Walnut Creek 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.