Spray foam insulation
High-performance spray foam seals air leaks and delivers superior R-values for lasting energy efficiency.
Learn moreLoading...
Serving Hollister, CA and surrounding areas. (831) 271-0020
Hollister Insulation is a licensed insulation contractor serving Merced, CA with spray foam insulation, attic insulation, and blown-in services - most inquiries answered within 1 business day. We work across all of Merced and know what the Valley heat and tule fog winters demand from a properly insulated home.
Merced homes with hard-to-reach cavities, rim joists around slab edges, or areas that need both insulation and air sealing in a single pass are ideal candidates for spray foam. Closed-cell foam in particular holds up well against the tule fog moisture that settles on surfaces during the city's winter months, making it a durable choice for the San Joaquin Valley climate. Our spray foam insulation service covers open-cell and closed-cell options for Merced properties of all ages.
Merced attic temperatures routinely exceed 140 degrees Fahrenheit from June through September. Homes built in the 1960s through 1980s - which make up the majority of the older in-town neighborhoods - typically have attic insulation levels well below what California now requires. Topping up to R-38 or higher is the most direct way to stop summer heat from radiating into the living space and driving up cooling costs.
Blown-in cellulose or fiberglass is well suited to Merced's older stucco-clad homes, where wall cavities often have irregular blocking or settled original batts that need to be filled around existing obstructions. The material installs without demolishing interior finishes and fills every corner of the cavity, including around electrical boxes and blocking members that stop a batt from lying flat.
In a Merced summer, super-heated attic air moves through gaps around recessed lights, attic access hatches, and top-plate penetrations directly into the conditioned space below - undermining insulation that might otherwise perform well. Sealing those bypasses before adding new insulation material is standard practice on our Merced jobs and consistently delivers better results on post-installation energy bills.
Merced sits on slab foundations almost universally, so crawl space work is less common here than in coastal communities. But older properties with raised foundations - particularly some of the mid-century homes closer to downtown - can benefit from insulating the floor system above the crawl space to reduce winter heat loss and improve year-round comfort on the first floor.
Merced sits at just 167 feet above sea level in the flat San Joaquin Valley, far removed from the mountain conditions that most people associate with the city due to its role as the gateway to Yosemite. The climate here is one of the most thermally demanding in California for residential insulation. Summers run long and hot, with temperatures above 100 degrees Fahrenheit common from June through September. The bulk of the city's housing was built between the 1940s and 1980s under energy codes that required far less insulation than California's current Title 24 standards. Those older homes are working harder than they should to keep residents comfortable.
Tule fog adds a seasonal complication that is easy to overlook. From December through February, the San Joaquin Valley regularly experiences dense ground-level fog that can persist for days at a stretch, keeping exterior surfaces continuously damp. Over many winters, that moisture can find its way into attic cavities and wall assemblies, slowly degrading organic insulation materials and creating conditions for mold in poorly ventilated spaces. The clay-rich soil under most Merced homes swells in winter and shrinks in the dry heat of summer, generating enough movement to open small gaps in stucco exteriors and around window frames - entry points for both air and moisture that bypass insulation entirely.
Our crew works regularly in Merced and has direct experience with the city's two very different housing zones. In the older neighborhoods close to downtown - the streets near the historic Fox Theatre on Main Street and the postwar blocks that fan out from the city center - homes are predominantly single-story stucco ranch houses on concrete slabs with little or no original wall insulation. In the newer areas on the northeast side, particularly the subdivisions that grew up around UC Merced, homes are better insulated but often still benefit from attic top-ups and air sealing work.
Highway 99 bisects the city and is the main route most people use to get around Merced. Lake Yosemite Regional Park sits on the northeast edge of town and is a useful reference point for the newer neighborhoods we work in frequently. Whether a job is on the older streets near downtown or in a newer subdivision off the Bellevue Road corridor, we know what to expect in terms of access, construction type, and the specific conditions those homes deal with year after year.
We also serve homeowners in nearby Turlock, where the same Central Valley heat extremes and stucco-clad housing stock create nearly identical insulation challenges to what we see throughout Merced.
Reach us by phone or through the contact form on this site. Most Merced homeowners hear back within 1 business day, and we will confirm a site visit time that works around your schedule.
We walk the attic, walls, and any other areas of concern and give you a written estimate before any work begins. Pricing is specific to your home - not a generic square-footage number - and we explain every line so there are no surprises.
Most Merced insulation jobs are completed in a single day. You do not need to vacate the home, and we protect interior areas and clean up before we leave. Air sealing is done before any new insulation material goes in.
After installation, we walk you through what was done and show you the coverage achieved. If anything needs attention, we address it before calling the job complete. We are reachable after the job if questions come up.
We serve all of Merced with free on-site estimates, no obligation, and same-week scheduling available.
(831) 271-0020Merced is the county seat of Merced County and home to roughly 90,000 residents in the heart of the San Joaquin Valley. The city is often called the Gateway to Yosemite because Highway 140 runs directly from downtown Merced to Yosemite National Park about 80 miles east. The character of the city is shaped by agriculture - surrounding dairy farms and orchards are among the most productive in California - and by the growth that UC Merced, which opened in 2005 on the northeast edge of the city, has brought to the area over the past two decades. The neighborhoods near Lake Yosemite Regional Park and along the Bellevue Road corridor are among the newest and fastest-growing parts of town, while the older blocks near Main Street and the historic downtown district retain the scale and character of a classic Central Valley farm community. Residents in nearby Los Banos face many of the same insulation challenges and are also within our service area.
The housing stock reflects the city's growth pattern. Most homes in the established neighborhoods were built between the 1940s and 1980s - single-story ranch houses with stucco exteriors, concrete slab foundations, and attached garages. Roughly 44% of housing units are owner-occupied, with the rest split between rentals and investment properties. On the northeast side, newer subdivisions built since 2000 are larger, often two stories, and were constructed under more demanding energy codes - but even those homes benefit from attic inspections and air sealing as they age. The U.S. Census Bureau's Merced city profile provides a useful overview of the city's demographics and housing breakdown.
High-performance spray foam seals air leaks and delivers superior R-values for lasting energy efficiency.
Learn moreProper attic insulation reduces heat transfer and keeps your home comfortable year-round.
Learn moreLoose-fill blown-in insulation fills irregular spaces and hard-to-reach areas with ease.
Learn moreWhole-home insulation solutions that improve comfort and lower monthly energy bills.
Learn moreSafe removal of old, damaged, or contaminated insulation to prepare for a fresh installation.
Learn moreInsulating your crawl space prevents moisture, mold, and energy loss from below the floor.
Learn moreWall insulation reduces outside noise and improves thermal performance throughout your home.
Learn moreSealing air leaks throughout the building envelope dramatically improves energy efficiency.
Learn moreBasement insulation controls temperature, reduces moisture, and lowers heating costs.
Learn moreDense closed-cell foam provides maximum R-value per inch and a strong vapor barrier.
Learn moreLightweight open-cell foam expands to fill cavities and delivers excellent sound dampening.
Learn moreCommercial-grade insulation systems for offices, warehouses, and industrial facilities.
Learn moreHeavy-duty vapor barriers protect crawl spaces from ground moisture and humidity.
Learn moreProfessional vapor barrier installation prevents moisture damage in walls, floors, and foundations.
Learn moreAttic air sealing stops conditioned air from escaping and cuts heating and cooling costs.
Learn moreRetrofit insulation upgrades existing structures for improved comfort without major renovation.
Learn moreServing these cities and communities.
Summer heat is not going anywhere. Call or submit a request now and we will have your estimate ready before the next heat wave hits.