Hollister has a set of conditions that work against insulation in ways that do not apply in most other California cities. The clay soils that underlie much of the area expand when they absorb winter rain and contract sharply through the long dry summer. That seasonal movement is not dramatic enough to feel, but it is consistent enough to shift foundation piers, open gaps in stucco, and dislodge batt insulation from floor joists over years. Hollister also sits near the Calaveras Fault, which produces frequent small earthquakes - enough to keep building envelopes in a state of gradual movement that opens small gaps and loosens mechanical connections over time. In a city where 65 to 70 percent of housing is owner-occupied, these are problems that fall directly on homeowners to address.

The housing stock layers these challenges in different ways. The oldest homes near the historic downtown core were built in the early 1900s and frequently have little or no crawl space vapor protection, original attic insulation that has never been replaced, and wood-frame construction that requires different handling than the stucco tract homes that make up the 1970s and 1980s neighborhoods. Newer subdivisions on the east and south sides have more recently built homes but face the same clay soil and climate conditions. Hollister summers are hot - mid-90s and above are routine - and winter rain arrives concentrated in November through March, so the thermal demands on a home shift sharply between seasons. Insulation that handles one half of that cycle poorly shows up on every utility bill.

Hollister is the county seat of San Benito County, with a population of about 45,000 people, located in a valley surrounded by farmland and hills roughly 35 miles southeast of San Jose. It is predominantly a community of single-family homeowners - about 65 to 70 percent of occupied housing is owner-occupied - which means most people here have a direct stake in how their properties are maintained. The historic downtown has an older commercial and residential core with buildings dating back to the late 1800s and early 1900s, including Craftsman bungalows and Victorian-era houses that still line the residential streets nearby. The newer subdivisions on the east and south sides of town have tract homes built from the 2000s through the 2020s.

Hollister is widely known as the city where American motorcycle culture took root - the 1947 rally here inspired the 1953 film "The Wild One" - and the annual Hollister Independence Rally each July still brings tens of thousands of visitors to the downtown area. The Hollister Hills State Vehicular Recreation Area just south of town is one of the most popular outdoor destinations for locals in San Benito County. We also serve Gilroy to the north, which shares a similar inland climate and housing profile with Hollister.