
Custom Rohnert Park Insulation installs spray foam, blown-in, attic, crawl space, and wall insulation for homeowners across Sonoma County. We seal the gaps that make your home uncomfortable and your energy bills high.

Custom Rohnert Park Insulation is a locally owned insulation contractor serving Rohnert Park, CA and surrounding Sonoma County communities. We offer 16 insulation and air-sealing services to help homeowners cut energy costs, improve comfort, and protect their homes from moisture. Whether your house was built in the 1960s or the 2000s, we can assess what it needs and get the job done right.

High energy bills? Spray foam seals gaps and insulates in one step, cutting heat loss for good.
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Hot upstairs rooms and high PG&E bills often trace back to a thin or missing attic insulation layer.
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Blown-in loose fill fills every corner of your attic quickly, lowering cooling costs by next season.
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Whole-home insulation upgrades tackle the walls, attic, and crawl space - everywhere your heat escapes.
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Old or wet insulation harms air quality and energy efficiency - safe removal is the right first step.
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Cold floors and moisture under your home are signs the crawl space needs proper insulation now.
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Drafty rooms and cold walls in winter mean your exterior walls are losing heat every day.
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Insulation works far better when air leaks around fixtures and pipes are sealed first.
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An uninsulated basement drags down your whole home's temperature and raises heating bills.
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Closed-cell foam creates a dense, moisture-resistant barrier ideal for crawl spaces and garages.
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Open-cell foam is a cost-effective option for interior walls and attics, with great sound dampening.
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High heating and cooling costs in your building often come down to missing or aging insulation.
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A vapor barrier stops ground moisture from working its way into your crawl space and home.
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Proper vapor barriers protect your floors, framing, and air quality from hidden moisture damage.
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Sealing attic gaps is the fastest way to reduce heat loss before adding new insulation material.
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Retrofit insulation upgrades bring older homes up to modern comfort without a full renovation.
Learn MoreReach out by phone or through our contact form. We respond within 1 business day. Tell us a little about your home and the problem you are dealing with - high bills, drafty rooms, a damp crawl space - and we will schedule a free on-site assessment at a time that works for you.
One of our team members visits your home and takes a look at the areas that need attention. We check insulation levels, look for air leaks, and assess any moisture conditions. After the walk-through, we explain what we found and provide a written estimate with clear pricing - no vague quotes, no pressure.
Once you approve the estimate, we schedule the installation and get it done. Most jobs are finished in a single day. We clean up when we leave and walk you through the completed work. Most homeowners notice a difference in comfort and energy use within the first heating or cooling cycle after the job.
We hold a valid California contractor license issued by the CSLB and carry full liability insurance on every project. You can verify our license at cslb.ca.gov before you hire us.
We visit your home, assess the insulation, and give you a written quote - at no cost. You decide whether to move forward. No pressure, no upselling, no bait-and-switch pricing.
We have been insulating homes in Rohnert Park and Sonoma County since 2015. We know the local housing stock, the climate quirks, and the permit process - so jobs go smoothly from start to finish.
Every installation comes with a workmanship guarantee. If something is not right after the job is done, we come back and make it right. Our reputation in Sonoma County depends on it.
Ready to get started? Call (707) 210-9475 or request a free estimate online.
They blew in new insulation in my attic last spring, and the upstairs bedrooms were noticeably cooler that summer. My PG&E bill dropped about $40 a month starting in June. The crew was done in half a day and left the hallway cleaner than they found it.
Karen M., Santa Rosa - Attic insulation
I had a musty smell coming from under my house for years. They installed a vapor barrier and sealed the crawl space, and that smell is completely gone. The floors feel warmer too. Wish I had done it sooner.
David R., Petaluma - Crawl space vapor barrier
We got spray foam installed in the walls of our 1970s ranch home. The house holds temperature so much better now. They walked me through everything before and after, and the price matched the written estimate exactly.
Linda T., Cotati - Spray foam insulation
We respond within 1 business day. There is no obligation to move forward after you submit - just fill out the form and someone from our office will call to schedule a free on-site estimate at your home.
(707) 210-9475Custom Rohnert Park Insulation serves Rohnert Park, CA and 11 surrounding cities and communities across Sonoma County and northern Marin County, including Santa Rosa, Petaluma, Cotati, and Novato. We cover all 12 service areas and can usually schedule a free on-site estimate within the same week you call.
Heat builds up in an under-insulated attic and radiates straight down into your living space. Rohnert Park temperatures regularly climb into the 90s from June through September, making attic insulation one of the most impactful upgrades a homeowner here can make.
Not necessarily a full replacement - but those homes were built to much lower standards than today. Most need attic top-ups and air sealing at a minimum. A free assessment tells you exactly what is there and what it would take to reach current comfort and efficiency levels.
Marine air pushes through the Petaluma Gap corridor and can elevate humidity in crawl spaces and attics. Fiberglass batts absorb that moisture and lose effectiveness. Closed-cell foam and vapor barriers are specifically designed to resist it. The U.S. Department of Energy recommends choosing moisture-resistant materials in damp climates - see energy.gov/energysaver/insulation for details.
Yes - when paired with air sealing. Smoke enters homes through the same gaps that let conditioned air escape. Sealing attic penetrations, electrical fixtures, and wall gaps as part of an insulation job closes those pathways. After Sonoma County wildfire seasons, this has become a practical concern for many local homeowners.
Yes. Rohnert Park is in PG&E territory, and PG&E offers rebates for qualifying insulation upgrades. Federal tax credits under the Inflation Reduction Act also apply to many insulation improvements. Ask your contractor about both programs before you sign anything - the savings can meaningfully reduce your out-of-pocket cost.
Wet insulation compresses and loses R-value, and it can harbor mold. Insulation installed before the 1980s in some homes may contain materials no longer considered safe. A contractor should flag any concerns during the assessment. If removal is needed, it is handled before new material goes in.
Custom Rohnert Park Insulation is a licensed and insured insulation contractor based in Rohnert Park, CA, serving Sonoma County and 12 surrounding communities since 2015. We hold a valid contractor license issued by the California Contractors State License Board, which you can verify at cslb.ca.gov. Over the years we have completed insulation projects across all 16 service types we offer - from spray foam and blown-in attic insulation to crawl space vapor barriers and commercial work. We work on homes of every age, including the 1960s and 1970s ranch-style properties that make up a large part of Rohnert Park.
Learn more about our team and approachWhen your home has gaps around light fixtures, pipes, or the attic hatch, heat bypasses the insulation entirely. Sealing those gaps first makes any insulation you add far more effective. The U.S. EPA recommends combining air sealing and insulation for the best energy results.
EPA indoor air quality guidanceFor most Sonoma County homes, the recommended attic R-value falls in the R-38 to R-60 range, which means roughly 10 to 16 inches of depth depending on the material. Homes built before 1980 often fall well short of that. Your contractor should measure what is there and tell you exactly how far below the target your home sits.
Cold floors in winter, a musty smell in the morning, or visible condensation on pipes under the house are reliable signs. In Sonoma County homes, marine air and seasonal rain create real moisture risk in crawl spaces - especially those with original vapor barriers from the 1960s or earlier.
If you are not sure where to start, the best first step is a free on-site assessment. Call (707) 210-9475 and we will schedule a visit within the week.
Rohnert Park is a planned community in Sonoma County, located along Highway 101 between Santa Rosa and Petaluma. The city of about 43,000 residents was developed rapidly starting in the late 1950s, and most of its single-family homes date from the 1960s through the early 1980s. That housing stock is now 40 to 65 years old - right at the age when original insulation starts failing and energy costs start climbing. You can read more about the city at Wikipedia and through the U.S. Census QuickFacts.
The city is home to Sonoma State University and the Green Music Center, one of the best-known performing arts venues in the North Bay. Newer residential neighborhoods like Vast Oak and Willowglen on the southeast side sit alongside the original ranch-style tracts that define most of the city. Both generations of housing face insulation challenges - older homes with inadequate original coverage, newer homes that sometimes need targeted air sealing and crawl space work.
We serve homeowners all across Rohnert Park - from the neighborhoods near Sonoma State to the areas out near Graton Resort. If your home is losing heat in winter, getting too hot in summer, or showing signs of moisture problems under the house, we can help. Call (707) 210-9475 to schedule a free estimate.
By appointment only, no walk-ins.
Custom Rohnert Park Insulation
488 Anson Ave
Rohnert Park, CA 94928
(707) 210-9475team@rohnertparkinsulation.comAlways open, 24/7.
Call (707) 210-9475 or request a free on-site insulation estimate online. We serve Rohnert Park and 12 communities across Sonoma County.