Insulation contractor in Gilroy, CA - attics and crawl spaces checked before we insulate
M&R Watsonville Spray Foam Insulation insulates attics, crawl spaces and walls in Gilroy, CA. We air seal, top up loose fill, spray foam and pull out old material that's gone bad, so rooms hold their temperature.
How Gilroy houses shape an insulation job
Gilroy calls usually start the same way they do back home in Watsonville. Someone has an upstairs that's hot by late afternoon, a drafty older house they just bought, or a rental a property manager can't keep comfortable. We come over the hill for these the same way we head out to Interlaken and Prunedale.
The city runs from older houses near downtown to newer subdivisions on the edges, and the two need different things from us. Older places tend to have thin, tired insulation and a crawl space nobody's looked at in years, while newer ones often have ductwork in the attic, which changes what we'd put up there.
Working in Gilroy: permits, licenses and price
The permit comes first, because it usually sets the calendar. Gilroy's Building Division issues building permits for renovation work in the city, and its examples don't name insulation on its own, so I check with the division before we set a start date. When a job needs a permit, we pull it and line up the inspections, and you can follow review and inspections on the city's GO Permit portal. We're fully licensed and insured, and there's one more thing worth checking with anyone you hire. Gilroy requires a city business license for every business working in the city, even ones based outside it like us, so it's a fair question to ask any contractor, us included.
Price comes down to what's already up there. How many inches you have, whether old material is soaked or full of droppings and has to come out, how many gaps need sealing around can lights, pipes and the hatch, and how tight the space is to work in all move the number. The bigger choice is material. Foam costs more and seals air while it insulates, but in most attics sealing the gaps and topping up with blown-in insulation, loose fill blown through a hose, is the better buy unless your ductwork runs through the attic. The schedule turns on the permit review and on whether old insulation has to come out first, and your own number comes from the estimate I write after I've looked at the space.
What Gilroy houses need before new insulation goes in
The city rates termite risk in Gilroy as very high, and that matters to us because attic and crawl space insulation sits right on the framing. Before anything new goes in, I look at the wood, and if something looks wrong I'll tell you to get it dealt with first, since burying damaged wood under fresh insulation just hides it.
Older houses bring their own list. We often find insulation packed down to a few inches, or soaked, or full of droppings, and we pull that out instead of piling new material on top, because the problem stays under there if we don't. Then we seal the gaps, keep the eave vents clear so the attic can still breathe, and carry the coverage full depth out to the edges, where it usually runs thin. It's the same as a kitchen. You set up a clean station before you cook.
Get a free on-site insulation estimate for your Gilroy home
We'll get back to you within one business day to set a time, and there's no obligation. I come out to your Gilroy house myself, look at the attic, crawl space or walls, and write the estimate from what I actually see.
(831) 666-1048How it goes when you call us in Gilroy
Call or send a message
Call (831) 666-1048 or fill out the form and tell us what you're noticing, like a hot upstairs, cold floors or a high power bill. The age of the house helps if you know it.
I come out and look
I come out myself and check the attic, crawl space or walls, including how many inches are already up there and what shape the wood's in. Clear a path to the attic hatch and the crawl space door if you can.
Get your written estimate
I write it up from what I saw and point out anything that has to be fixed before any insulation goes in. If the job isn't worth doing yet, I'll tell you.
We line up the permit
If the job needs a permit, we pull it with Gilroy's Building Division and set up the inspections. The city's review decides when we can start, and you can watch it move on the portal we mentioned above.
Prep, insulate and clean up
Our crew preps the space, seals and insulates, then cleans up before leaving, and I check the work before we call it done. On foam jobs we tell you ahead of time when you'll need to be out and when you can come back.
Insulation work, start to finish
Gilroy insulation questions we hear
How much does insulation cost in Gilroy, CA?
The price for a Gilroy attic or crawl space comes down to how much prep it needs and which material goes in, so I give you a number only after I've looked. Pulling out soaked or dirty insulation, sealing a lot of gaps and choosing foam over loose fill all raise it, while a clean attic that just needs topping up costs less. Call (831) 666-1048 and I'll come take a look.
What happens if insulation work starts in Gilroy without a permit?
The city can hold the project up until it can move forward under its current planning and building rules. If it gets a red tag, a placard posted to stop the work, you call Gilroy's Building Division at 408-846-0451 to find out what comes next. That's why we check with the city before work starts, not after.
What building codes apply to insulation work in Gilroy in 2026?
Gilroy enforces the current California building codes, known as Title 24, along with local changes of its own. The city's building office places Gilroy in climate zone 4 of the state energy code, and when a job here needs a permit, those are the standards it's held to.
How long before we can go back inside after spray foam in my Gilroy house?
The foam maker's instructions for the product set the re-entry time, which is how long before people and pets can come back in, and I'll give you that before the job is booked. We plan the day around it, so kids and pets are out before spraying starts and you know when to come home. With blown-in loose fill there's usually no need to leave.
What causes a hot upstairs room in a Gilroy house?
Most often it's air leaking through gaps in the attic floor and insulation that's thin at the edges, not too little insulation overall. Gaps around can lights, pipes and the attic hatch let air move between the attic and the rooms below, and buried eave vents keep the attic from breathing. We seal those gaps first and even out the coverage, which usually helps more than just adding inches.
Does Gilroy's expansive soil affect crawl space insulation?
It can, because ground that swells when it's wet and shrinks when it dries can move a house a little over the years. The city takes the soil seriously enough to require a soil report for all new construction. On older houses we look for gaps that movement may have opened at the sill and around pipes, and we seal them before we insulate the crawl space.
Call about your Gilroy attic or crawl space
We pick up into the evening and on weekends, so call (831) 666-1048 or send a message through the form whenever you're standing under that hatch wondering what's up there.