Gilroy homes deal with 95-degree summers and aging insulation that was never built for today's energy costs. We fix that - spray foam, attic, crawl space, and more.
Gilroy homes deal with 95-degree summers and aging insulation that was never built for today's energy costs. We fix that - spray foam, attic, crawl space, and more.
Gilroy Insulation is a licensed insulation contractor based in Gilroy, CA, serving homeowners and businesses across 12 cities in the South Bay and Central Coast. We offer 16 insulation services - from spray foam and attic upgrades to crawl space vapor barriers and commercial projects. Most homes in this area were built before 2000 and are losing energy every day through thin or damaged insulation. We find where your home is losing heat and fix it with materials and methods that last.
Old insulation letting heat in all summer? Spray foam fills every gap and crack, creating an air-tight barrier that keeps your home cooler without running the AC all day.
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Is your attic turning into an oven by July? Proper attic insulation blocks that heat before it radiates down through your ceiling and into your living space.
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Rooms too hot upstairs and too cold in winter? Blown-in insulation fills every corner and tight space your old batts never reached, evening out the temperature across your whole home.
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Paying too much to heat and cool a house that never feels quite right? A full home insulation assessment finds where you're losing the most energy and fixes it.
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Found rodent damage or mold in your attic insulation? Old, contaminated material has to come out before new insulation can do its job properly.
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Cold floors in winter and musty smells from below? Crawl space insulation seals out moisture and cold air before they ever reach your living area.
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Drafty walls making certain rooms uncomfortable year-round? Wall insulation closes off the gaps that let heat - and cold - pass straight through your exterior walls.
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New insulation not delivering the savings you expected? Air sealing closes the gaps insulation alone can't fix - around pipes, wires, and fixtures where conditioned air escapes.
Learn MoreReach out by phone or through our contact form. We will ask a few basic questions about your home and what you are noticing - high bills, uncomfortable rooms, pest activity, or a planned renovation. We respond within 1 business day.
A member of our team visits your home, checks your attic, crawl space, and walls, and measures what is already there. You get a written estimate that explains what we found, what we recommend, and exactly what it costs - before any work begins.
Our crew completes the work - usually in a single day for most projects. We clean up, walk you through the finished job, and leave you with documentation of the materials and R-values installed. Most homeowners feel the difference the same week.
Our California Contractors State License Board license is active and verifiable at cslb.ca.gov. We carry full general liability and workers compensation insurance on every project - so if something goes wrong, you are never left holding the bill.
We visit your home, assess the space, and give you a written estimate before any commitment. If you decide not to move forward, that is fine. We want you to make a confident decision, not a rushed one.
We are a locally owned company based in Gilroy, CA. We work on homes in this valley every week and know the housing stock - the 1980s tract homes, the older downtown bungalows, and the newer subdivisions on the east side.
Every call and form submission gets a response within 1 business day. We schedule estimates within a few days of first contact and complete most installations within the same week. No waiting weeks to hear back.
Ready to get started? Call (669) 345-1323 or send us a message.
"The crew showed up on time, finished the attic in one day, and my upstairs bedroom is finally livable in summer. First August since we moved in that I did not dread coming home."
Karen M., Morgan Hill - Attic insulation
"We had mice getting into the crawl space every winter. The team did the spray foam and a vapor barrier, and we have not seen evidence of a single rodent since. Solved two problems at once."
David R., Gilroy - Crawl space insulation
"Got three quotes. These guys were not the cheapest, but they were the only ones who actually went into the attic before giving me a number. The estimate was accurate and the job matched exactly what they described."
Sandra L., Los Gatos - Spray foam insulation
We respond within 1 business day - no phone tag, no waiting. There is no obligation to move forward after your estimate. After you submit, someone from our office will call you to schedule a free on-site assessment at a time that works for you.
(669) 345-1323Gilroy Insulation is based in Gilroy and serves 12 cities across the South Bay and Central Coast, including Morgan Hill, Los Gatos, San Jose, Santa Cruz, and more. Most jobs are scheduled and completed within the same week of your initial inquiry.
An under-insulated attic can hit 150°F on a Gilroy summer day, radiating heat straight down through your ceiling. The fix is not a bigger AC - it is a thermal barrier between your attic and your living space.
Insulation slows heat loss through the floor; a vapor barrier blocks ground moisture from entering the space. Most crawl spaces in older Gilroy homes need both - and skipping either one limits what the other can do.
Yes - and it often matters more than adding more insulation. Air moves through gaps that insulation cannot fill. Sealing those gaps first is what allows insulation to perform at its rated R-value.
Closed-cell spray foam hardens into a solid surface that physically closes entry points rodents and insects use. It does not repel them - it eliminates the gaps they use to get in.
The U.S. Department of Energy estimates proper insulation and air sealing can cut heating and cooling costs by 10-20% annually. Homes with little or no existing insulation often see savings at the higher end of that range. Learn more at{' '}energy.gov.
Insulation from the 1970s and 1980s has likely settled, compressing its R-value. If rodents or moisture have been in the space, it may be contaminated. A free assessment takes 30 minutes and gives you a clear answer.
The ENERGY STAR Seal and Insulate program provides homeowners with authoritative guidance on insulation priorities and expected savings.
Gilroy Insulation is a licensed and insured insulation contractor based in Gilroy, CA, serving 12 cities across the South Bay and Central Coast since 2025. Our license is issued by the California Contractors State License Board and is verifiable at cslb.ca.gov. We have completed insulation projects across 16 service categories - from single-room attic upgrades to commercial spray foam jobs - and every project comes with written documentation of materials and R-values installed. Learn more about our company.
Insulation from the 1980s and 1990s has had decades to settle and potentially absorb moisture or pest damage. Even if it looks intact from the hatch, the effective R-value may be well below its original rating.
Insulation slows heat transfer through materials but does not stop air movement through gaps. Adding more insulation on top of air leaks is like adding blankets over an open window - the gaps cancel out the benefit.
A reputable contractor will show you the attic before and after, leave depth markers so you can verify the coverage, and provide written documentation of the materials and R-values installed.
The U.S. Department of Energy Insulation Guide provides R-value recommendations by climate zone and a breakdown of insulation types - a useful reference before getting quotes. If you have questions about what your specific home needs, call us at (669) 345-1323 and we will walk you through it.
Gilroy sits at the southern end of Silicon Valley, about 30 miles south of San Jose, with a population of roughly 60,000 residents. The city is known across the country as the Garlic Capital of the World, a title earned by decades of agricultural tradition and celebrated every summer at the Gilroy Garlic Festival at Christmas Hill Park. From the newer subdivisions on the east side of town to the older streets near downtown, Gilroy has a mix of housing from every decade since the early 1900s.
Most of the homes we work on in Gilroy were built between the 1980s and early 2000s - the period of rapid residential growth driven by Silicon Valley expansion. According to Census data, the median home value in Gilroy sits in the range of $700,000 to $800,000 - these are significant assets, and homeowners here invest in keeping them in good shape. Many of those 1980s and 1990s tract homes, with their stucco exteriors and tile roofs, are now at the age where insulation needs attention. Whether you are near the Gilroy Premium Outlets on the north end or in an older neighborhood closer to downtown, we know the homes in this city and we know what they need.
Gilroy summers regularly push into the mid-90s and above, and the valley location means that heat builds and holds. Homes without adequate insulation become difficult and expensive to cool from June through September. Add the wildfire smoke that drifts in from the Santa Cruz Mountains and the agricultural dust from surrounding farmland, and the case for a tight, well-insulated building envelope is strong. Gilroy Insulation exists to help this community get more comfortable homes and lower energy bills - one project at a time.
By appointment only, no walk-ins.
Gilroy Insulation
450 E 9th St, Gilroy, CA 95020
Always open, 24/7.
Call us or send a message today. We respond within 1 business day, provide free on-site estimates, and complete most insulation projects in a single day.
