Spray foam insulation
High-performance spray foam seals air leaks and delivers superior R-values for lasting energy efficiency.
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Serving Hollister, CA and surrounding areas. (831) 271-0020
Hollister Insulation serves Gilroy, CA homeowners with attic insulation, home insulation, and crawl space services - most inquiries get a response within 1 business day. We know the Gilroy housing stock well, from the stucco tract homes built in the 1980s and 1990s to the newer subdivisions on the east side of the city.
Gilroy homes built in the 1980s and 1990s often have attic insulation that has settled significantly below the depth needed to meet current California energy standards, and original wall insulation in older homes near downtown may be minimal or missing. Our home insulation service evaluates your full building envelope and addresses the areas where heat gain and air leakage are costing you the most on your monthly bills.
Gilroy's valley location traps summer heat, and attic temperatures in under-insulated homes can push well above air temperature by midday, radiating heat into living spaces for hours after the outdoor temperature drops. Adding insulation to the attic floor directly reduces that heat transfer and cuts the load on your air conditioning system during the months when Gilroy bills spike the most.
Gilroy's clay soils expand and contract every year with the wet-dry cycle, and that movement gradually opens gaps around pipes, electrical penetrations, and attic bypasses in homes throughout the city. Air sealing addresses those pathways so your insulation performs at its rated value instead of competing with constant infiltration from the unconditioned attic or crawl space above and below.
Gilroy winters bring concentrated rain that can saturate soil under homes with inadequate ground moisture control, especially in older properties near the historic downtown. Insulating and sealing the crawl space prevents damp air from moving into floor systems, reduces mold risk, and makes ground-floor rooms noticeably more comfortable in both winter and summer.
For Gilroy homeowners dealing with irregular framing, rim joists, or areas where a vapor seal and insulation need to work together, spray foam is the most durable solution. It adheres to irregular surfaces, fills gaps that loose-fill cannot reach, and does not settle or compress over time the way older blown-in products do.
Gilroy homes from the 1980s occasionally have attics where original insulation has been disturbed by roof repairs, rodent activity, or improper HVAC installations that leave materials compressed and uneven. Removing that material and starting fresh is often more cost-effective than trying to add new insulation on top of a compromised base layer.
Gilroy sits at the southern tip of Silicon Valley in a valley that concentrates heat in summer. Temperatures regularly exceed 90 degrees from June through September, and triple-digit days in July are not unusual. Most of the city's housing stock - the majority built between the 1980s and early 2000s - was designed and insulated to the energy standards of those decades, which are far below what California's Title 24 code requires today. The combination of aging insulation and increasingly hot summers creates a straightforward problem: homes that feel uncomfortable, air conditioners that run constantly, and PG&E bills that keep climbing. Wildfire smoke and dry Diablo winds in late summer and fall add another dimension, as poor air sealing allows smoke and particulate matter to infiltrate homes during those periods.
The clay-heavy soils across much of Gilroy compound the insulation challenge. These soils swell significantly during wet winters and shrink back in dry summers, and that annual movement gradually opens small gaps in building envelopes - around pipes, at foundation plates, and at transitions between framing and exterior materials. A house that was reasonably tight when it was built in 1992 may have accumulated years of air leakage pathways that rob insulation of its effectiveness. A contractor familiar with Gilroy homes will account for this when assessing and pricing a project.
We travel Monterey Road, Leavesley Road, and US-101 to reach job sites throughout Gilroy regularly, and we have worked on the full range of housing types the city has to offer - from the older Craftsman homes and wood-frame houses in the historic district near downtown, to the large stucco subdivisions in Glen Loma Ranch and the developments on the east side of town. The differences between those property types matter when quoting and completing an insulation job, and we do not treat every Gilroy home as the same project.
Gilroy is part of a corridor that runs from Hollister north through Morgan Hill and into the broader Bay Area, and we serve the whole stretch. If you are in a community just north of Gilroy, Morgan Hill, CA is a neighboring area we cover as well. Gilroy is a city most people know for the Gilroy Garlic Festival at Christmas Hill Park - an event that draws hundreds of thousands of visitors each summer - but for the people who live here, it is primarily a community of homeowners looking after properties they plan to stay in for years.
Many Gilroy residents commute north to San Jose and the broader Bay Area, which means they are away from home during the day. We structure jobs to accommodate that - most attic insulation projects finish within a standard workday, and we keep you updated by phone so you know what happened at your house before you return.
Call us at (831) 271-0020 or submit the inquiry form on this page. We reply within 1 business day to schedule an in-home assessment. We offer flexible scheduling including early-morning appointments for homeowners who commute.
We visit your Gilroy home, measure insulation depth and condition in the attic and crawl space, and check for air sealing gaps. You receive a written estimate with the full scope and total cost. No pressure and no deposit required just to receive your quote.
Most Gilroy attic insulation projects take two to six hours on a single day. We protect your belongings, handle all material and equipment, and clean up completely before leaving. You do not need to supervise the work, but please be available at the start for access.
We review the completed work with you, confirm insulation depth, and answer questions. If a PG&E rebate applies to your project, we will let you know about current programs so you have time to submit before any deadlines pass.
We serve homes all across Gilroy - from the older neighborhoods near downtown to the newer subdivisions on the east side. Written estimate before any work begins. No deposit required for your quote.
(831) 271-0020Gilroy is a city of roughly 60,000 residents at the southern end of Santa Clara County, sitting at the foot of the Santa Cruz Mountains where they meet the Diablo Range. It is the southernmost city in Silicon Valley and functions partly as a bedroom community for San Jose and the broader Bay Area, with many residents commuting north on US-101. The housing mix is predominantly single-family homes, with owner-occupancy rates around 55 to 60 percent. Most of the housing stock consists of stucco-exterior tract homes built in planned subdivisions during the 1980s, 1990s, and early 2000s. Older neighborhoods near the historic downtown include Craftsman-style homes and wood-frame houses from the early 1900s. Newer developments on the eastern and southern sides of the city, including neighborhoods like Glen Loma Ranch, represent more recent construction with larger floor plans and more modern building systems. For more, see the Gilroy, California Wikipedia article.
Gilroy is internationally recognized as the Garlic Capital of the World, a title anchored by the garlic farming and processing operations that have operated in the area for generations and reinforced by the annual Garlic Festival held at Christmas Hill Park. The Gilroy Premium Outlets on the north end of the city is another well-known landmark that draws visitors from across the Bay Area. To the north, the city of Morgan Hill, CA is the next community up the corridor, and we serve it as part of our broader service area.
High-performance spray foam seals air leaks and delivers superior R-values for lasting energy efficiency.
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Gilroy summers are hot and only getting hotter - every month you wait on under-performing insulation is another month of high cooling bills. Call or submit a request and we will respond within 1 business day.