Find top-rated spray foam contractors and save up to 35% on energy bills
Compare 6 verified spray foam insulation contractors serving Castro Valley, California, backed by 501 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 Castro Valley 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.
Homes in Castro Valley typically cut energy use by 30%–40% with spray foam. Change the numbers below to fit your home.
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.
Recent Reviews:
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.
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!
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.
Recent Reviews:
Great company Highly recommended 5 star….
Responded very quickly and very professional fantastic job
Great , would recommend !
Recent Reviews:
David and his team were fantastic! Pro Attic was recommended to us by a friend who had recently installed HVAC in their home, and after hearing how highly they spoke of them, I didn’t even feel the need to shop around. This family-owned company is hardworking, reliable, and professional. We scheduled our consultation within days and had our installation set up within two weeks. David was upfront and honest about what would work best for our home, and we trusted his expertise completely. The team was extremely clean and careful when removing and installing the units, and the entire project was completed in just two days.
If I could give six stars, I would. Absolutely outstanding service — top-quality work from a thoroughly professional company. I’d run out of superlatives trying to describe how well they handled the job. They were responsive, efficient, and took care of a really tough rodent and skunk problem with total expertise. Truly impressive from start to finish. It’s rare to see this level of quality and follow-through these days. Highly recommend!
I first used Pro Attic Restoration when helping a friend find a vendor for rodent issues, attic & crawl space cleaning, restoration and new ducting. They also dug out and placed a sump pump to keep the crawl space dry. They answered all my questions and were very helpful. The job turned out so well, I asked them restore our attic ducting, insulation, place 300 sq ft of plywood floor and a drop down ladder which has totally enhanced our storage capacity. The price was competitive and I would recommend them.
Recent Reviews:
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.
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.
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:
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.
The very best experience, friendly staff , excellent service,highly recommend.
Thank you the insulation is amazing great job guys
Recent Reviews:
They took out old insulation, installed new vapor barrier, and added fresh insulation. The difference is immediately noticeable , house feels more energy-efficient and comfortable. Crew was meticulous, friendly, and very professional. I highly recommend for anyone upgrading their attic!
The team that cleaned and insulated my attic did an excellent job! They worked meticulously, arrived on schedule, and left everything immaculate. My house feels so much cozier now that the temperature has been adjusted.
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.
These are the questions Castro Valley 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 6 verified Castro Valley contractors above for exact quotes.
Not finding the right fit in Castro Valley? Many spray foam contractors travel to nearby towns. These communities within about 60 miles all have verified contractors listed.