Insulation contractor in Seaside, CA - attics and crawl spaces done in order
A10 Salinas Insulation and Spray Foam is an insulation contractor based in Salinas, and we insulate and air seal attics, crawl spaces and walls in Seaside homes and rentals, sealing the gaps first so new insulation does its job.
Seaside houses keep their surprises up in the attic
Seaside sits between Monterey and Marina, and most of our calls here come from neighborhoods of single-family houses, with a good number of rentals mixed in. A lot of these houses have been lived in for a long time and added onto along the way, a bedroom here, a room over the garage there, so no two attics we open here look quite alike.
An older house usually means the insulation up there went in decades ago and has packed down to a few inches, and an addition often means a second attic that never got the same treatment as the first, so I measure what's actually there before anyone talks about adding more.
What we know from working in Seaside
Before any building project or major repair, the city's Building & Code Enforcement Department asks owners to check with its Permits & Inspections counter at City Hall on whether the work needs a permit. We do that checking for you, and when a job needs one we file the application and set up the inspection visits, so on those jobs the permit usually sets the start date more than our calendar does. When you're comparing contractors here, it's fair to ask about two things, a California state contractor license and a current business license from the city, which issues them every year.
Once the paperwork's sorted, the job follows the same careful order we use in Salinas or down the valley in Soledad. The price moves with the size of the attic or crawl space, how much old insulation has to come out first, how many gaps need sealing and how tight the access is, and the schedule moves with those same things plus the permit. I'll give you your own number after I've been up there with a flashlight.
Insulation services in Seaside
- Spray foam insulation
- Attic insulation
- Blown-in insulation
- Home insulation
- Insulation removal
- Crawl space insulation
- Wall insulation
- Air sealing services
- Basement insulation
- Closed-cell foam insulation
- Open-cell foam insulation
- Commercial insulation
- Crawl space vapor barrier
- Vapor barrier installation
- Attic air sealing
- Retrofit insulation
Old attics and rental homes keep us busy
In a lot of Seaside attics the old insulation sits deep in the middle and thin at the edges, which is backward, because the edges over the outside walls need it as much as anywhere. We even it out and keep the eave vents clear, since burying them stops the attic from breathing and moisture ends up in the framing. If the whole house feels off, our home insulation work looks at the attic, walls and crawl space together.
Seaside also has plenty of rentals, and landlords tend to call when a tenant complains about the power bill or a cold back bedroom. Between tenants is the easiest time for us to work, and I'll tell you in plain words what's urgent and what can wait.
Get a free insulation estimate at your Seaside home
Send the form and we'll reply within one business day to set a time. Then I come out to your Seaside house, look at the attic, crawl space or walls myself and tell you what I see. The estimate is free, and there's no obligation to go ahead.
How a Seaside insulation job goes from call to cleanup
Call or send a message
Call (831) 243-7218 or use the form, and tell us which rooms bother you and when. We get back to you and set a time for me to come out.
I come out and look
I check the attic, crawl space or walls myself with a flashlight and a tape measure. A clear path to the attic hatch or crawl space door makes my day.
You get a written estimate
Each step gets its own line, so you can see what's removal, what's sealing and what's new insulation. If the job needs a permit, we take care of the paperwork.
Our crew works in order
A crew lead runs the install, starting with any removal and air sealing, which means closing up the gaps, before new insulation goes in, and I check in along the way. Then the crew cleans up after itself.
We walk the finished job
I go through the finished work with you, up the ladder if you'd like. You'll see the depth, the sealed gaps and the clear vents for yourself.
Attic and crawl space work
Insulation questions from Seaside homeowners
Does an insulation contractor in Seaside need a California state license?
Yes, whenever the job needs a building permit, uses any additional workers, or the labor and materials come to $1,000 or more across one or more contracts. The California Contractors State License Board sets that rule and issues the license. We're fully licensed and insured, so ask to see it before anyone starts work.
Which building codes apply to an insulation project in Seaside in 2026?
Projects submitted to the city after January 1, 2026, follow the 2025 California codes, including the Energy code, along with Seaside's own local amendments. Those are the rules a permitted job here has to meet, so they're what we work to. If your job needs a permit, we sort out which parts apply when we file.
How much does attic insulation cost for a house in Seaside?
Your price comes down to the attic's size, what has to come out first, and whether you choose foam or blown-in. Foam costs more because it seals air while it insulates, and sealing the gaps and topping up with blown-in, loose fill sent up through a hose, usually wins unless your ductwork runs through the attic. I'll walk you through that trade-off at the estimate.
How long does attic insulation take, and do we have to leave the house?
With blown-in and air sealing, most families stay home, and how long the crew is up there comes down to the attic's size and whether old material comes out first. Spray foam is different, because it has a re-entry time, the wait before you, the kids and the pets come back inside. I'll give you that for your job before we book the day.
What causes a Seaside house to stay drafty after new insulation goes in?
Usually it's gaps that never got sealed, around can lights, plumbing pipes and the attic hatch, so the new insulation is fighting a draft it can't stop. That's why we close those gaps first and only then add insulation. If you've got a room that never warmed up after someone else's job, that's where I look first.
What is the best way to insulate the crawl space under an older Seaside home?
Start by checking what's already down there, because new insulation over soaked material or rodent droppings just hides the problem. We pull out anything that's ruined, seal the gaps and then insulate. Doing it in that order is the difference between fixing it and covering it up.
Tell us what's going on in your Seaside house
Call (831) 243-7218 or use the form, and describe the room that bugs you most, since that usually tells me where to look first.