Crawl space insulation in Gilroy, CA - warmer floors over a dry crawl space
Cold floors or a damp smell coming up from under the house? We deal with the water first, then insulate so your floors feel warmer.
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What does insulating a crawl space actually involve?
Crawl space insulation in Gilroy means adding batts or spray foam under your house, either along the floor above the crawl space or on the crawl space walls, so the floor stops pulling heat out of the rooms you live in.
Maybe your floors are cold all winter, the power bill keeps climbing, or you bought an older house and nobody's looked under it in years. The crawl space is a good place to start, and sometimes old, soaked insulation has to come out first with insulation removal. The price mostly comes down to how big the space is, whether we insulate the floor or the walls, which material fits, and how much water or cleanup has to be handled before insulation goes in. The schedule turns on that same prep work and on how easy it is to get in and move around down there. I come out and look before you get a number, and the written plan lays out the work in order. We're based in Gilroy and work in the cities around it, north into Santa Clara County and south toward Hollister, Salinas and Watsonville.
How we handle crawl space insulation, step by step
Water comes first under the house, because insulation in a damp crawl space doesn't hold up well, so any drainage or moisture problem goes at the top of the plan. Next, a plastic ground cover goes over the dirt, since it belongs there whether the crawl space stays vented or gets closed up. Before anyone touches the vents, I ask what's down there. Closing vents without handling the other details can raise the moisture, and it can turn dangerous if a gas furnace or water heater under the house depends on that outside air to vent. Once that's settled, our installers seal the holes in the subfloor around pipes and wiring so air can't slip past the new layer. Then they fit the insulation tight between the joists or against the walls, whichever we've picked together, with no gaps or squashed spots.
A cold crawl space is often one part of a drafty house. If the chill also comes through the outside walls, wall insulation is usually the next thing we look at. Our air sealing services close the gaps around pipes, wiring and the attic hatch that let air move through the whole house.
Crawl space insulation in Gilroy and California's climate zones
California ties some of its efficiency standards for a house's outer shell, the floors, walls and roof that keep the heat in, to the climate zone the house sits in. That means the insulation plan for your floor or walls should be built around the right zone. Builders and building officials both need to know which zone applies, so it's a fair question to ask any contractor whose plan you're comparing, and I'll show you which one ours works from at the estimate.
A lot of the houses we get under around Gilroy are older ones on raised floors with vented crawl spaces, and after a wet winter we often find damp dirt, a torn ground cover, or ducts and pipes running through the space. We see the same setups on jobs in Morgan Hill and San Martin, so the plan starts the same way there, with a look at the water.
- Call (669) 205-6284
- Mon–Fri: 6 AM–11 PM, Sat–Sun: 7 AM–11 PM
- Gilroy, CA 95020
What happens when you call us about crawl space insulation in Gilroy?
Call or send the form
You call and I pick up, or I call you back with a few questions about the house. I'll ask how old it is, whether you've seen water underneath, and what's stored or installed down there.
I look under the house
I come out, get into the crawl space and note anything that has to be fixed before insulation goes in, like standing water, old pipe wraps or gas equipment. You get a written plan that lists the work in order and what each part covers.
Our installers do the work
They handle the water and ground cover first, then the sealing, then the insulation, so nothing gets covered up before it's sorted out. I check in while they're working.
We walk the finished job
Before we pack up, I go over the crawl space with you. You'll know what's down there now and what to keep an eye on.
Why Gilroy homeowners call Thermal Gilroy Spray Foam Insulation for their crawl space
The owner looks under your house
I come out myself to go through the crawl space and write the estimate, then I check in while our installers work and go over the finished job with you. You deal with the same person from the first look to the last walk-through, so you always know what's next.
In business since 2021
I spent years lining up crews and jobs for a busy company and learned insulation working next to the installers, then started this business in 2021. That background is why our plans put the work in the right order, so insulation doesn't end up laid over a problem that should have been fixed first.
Licensed and insured in California
We're licensed and insured. California's contractors board has a C-2 class for contractors who install insulation, so it's worth asking anyone you're thinking of hiring whether they hold it.
Under a house, the order of the work matters more than anything else, so tell us what you're dealing with and I'll take it from there.
Request an estimateGet a written plan for your crawl space
Send the form and I'll get back to you within one business day to set up a free on-site estimate, with no pressure to book. At the visit I go through the crawl space, note anything that needs fixing first and walk you through a written plan.
- Licensed and insured.
- Phone
- (669) 205-6284
- Location
- Gilroy, CA 95020
- Hours
- Mon–Fri: 6 AM–11 PM, Sat–Sun: 7 AM–11 PM
Questions about crawl space insulation in Gilroy
How much does crawl space insulation cost near Gilroy?
Insulating a crawl space in the San Jose area usually costs about $2,000 to $8,800 per job, and that's what the work tends to run in the area, not a quote from us. Where yours lands depends on the size of the space, floor or walls, the material, and how much water or cleanup has to come first. Your written estimate spells out what's included.
What is the best way to insulate a crawl space, the floor or the walls?
Air sealing and insulating the crawl space walls is recommended in every climate because it ties the crawl space into the house, but in some houses the floor above is the better place for the insulation. Wall insulation only makes sense once drainage and moisture problems are handled, since the space has to stay dry after it's closed up. I'll go through both options with you so you're comparing quotes on the same approach.
Is fiberglass a good choice under my house in Gilroy?
Usually not on its own, because Angi notes that fiberglass doesn't handle moisture well in a crawl space. It can do fine with a proper vapor barrier or a fully sealed crawl space, so we settle the moisture plan before we pick the material.
Does crawl space insulation need any upkeep?
Most crawl space insulation needs no ongoing maintenance or expense, according to Angi. A look under the house now and then is still worth it to catch water, pests or moisture building up.
What should I do if my crawl space has old wrap on the pipes or ducts?
Don't disturb it, and have a certified asbestos abatement firm inspect it, because older crawl spaces can have asbestos-based wraps on ducts and plumbing. That firm decides how it should be handled, and we plan our work around what they find.
How do I get my crawl space ready for an insulation crew?
Clear out stored boxes and anything else you keep down there, because the cover over the dirt needs to reach every corner of the floor. If something's too heavy or awkward to move, tell me at the estimate and we'll plan for it.
Other work that pairs with crawl space insulation
Wall insulation
If the rooms still feel cold once the floor is done, the outside walls are often where the heat goes next.
Air sealing services
Closing the small gaps around pipes, wires and hatches keeps drafts from working against the insulation you paid for.
Book a look under your house
If a furnace or water heater sits in your crawl space, or you've seen water down there, mention it when you call so I come out ready for it.
Request an estimateCall (669) 205-6284