Insulation contractor in Seaside, CA - attics and crawl spaces done in order
Beacon Marina Spray Foam Insulation insulates attics, walls and crawl spaces in Seaside, CA. We seal the gaps first, then add blown-in or foam insulation so drafty rooms and hot upstairs bedrooms are easier to keep comfortable.

Older houses, duplexes and rentals across Seaside
Seaside sits right next to Marina, so our crew is here often. Most of our Seaside jobs are in older one- and two-story houses, duplexes, rentals that property managers look after, and the odd shop or office. Many of them still have the insulation they were built with, or a thin layer someone added decades ago. We see the same mix in Monterey and back home in Marina.
That age shapes the job, because older insulation has usually settled, been patched over or gotten wet at some point, so I check what's up there before we add anything.
Working in Seaside: permits, licenses and price
Permits in Seaside go through the city's Building & Code Enforcement Department at City Hall. The department asks owners to check with it before building work or major repairs to find out whether the job needs a permit. When yours does, we handle the filing and set up the inspections, and we schedule the install around that instead of ahead of it. Before you hire anyone, you can look up their state license with the Contractors State License Board and ask whether they hold a current Seaside business license, which the city issues every year. We're licensed and fully insured.
Price here comes down to what's already in the attic or crawl space and what shape it's in. That means how many inches are up there, whether soaked or fouled material has to come out first, how much sealing the gaps need and how easy the space is to get into. The schedule mostly turns on removal and any permit, and the estimate I write after looking gives you your own figure. We bring the same crew and the same order of work to Seaside that we bring to Castroville and the other cities around Marina.
Services in Seaside, CA
Attic insulation
Many older Seaside attics still hold a few inches of packed-down original insulation. We measure what's there, seal the gaps, then build it up evenly, edges included.
Blown-in insulation
Topping up an older attic usually calls for blown-in insulation, loose fill sent through a hose. We keep the eave vents clear so the attic still breathes.
Attic air sealing
Drafty rooms in older houses usually trace to gaps around ceiling lights, pipes and the attic hatch. We seal those first so new insulation isn't fighting a draft.
Crawl space insulation
Cold floors are common in Seaside homes built over a crawl space. We check the ground and framing underneath first, then insulate under the floor.
Insulation removal
Covering soaked or rodent-fouled insulation in an older Seaside attic just keeps the problem. We pull it out and clean up before new material goes in.
Spray foam insulation
In two-story Seaside homes, the room over the garage is often the toughest to keep comfortable. Spray foam usually suits it because it seals as it insulates.
What older Seaside houses need from insulation
Over the years, a lot of Seaside attics got topped up by whoever was handy. We often find the insulation piled deep in the middle and thin along the edges. That's backward, because the edges are where the ceiling meets the outside walls. Sometimes the eave vents are buried too, so the attic can't breathe and moisture starts showing in the framing. We clear the vents first, then lay the new insulation so the edges get their share.
Rentals and duplexes are a big part of our Seaside work. The easiest time to clear out an old attic is usually between tenants. On a duplex, we check the whole shared attic so one side isn't sealed while the other side leaks.

Get a free on-site insulation estimate for your Seaside home
Send the form and we'll get back to you within one business day to set a time. I come out to your Seaside house myself, look in the attic, walls or crawl space, and write up a free estimate. There's no pressure to book.
How a Seaside job goes
Call or send the form
Call (831) 920-0697 or use the form, and tell us what you're noticing, like a hot upstairs or cold floors. We call back and set a time for me to come out.
I check what's up there
I go into the attic, walls or crawl space myself and note how many inches are there and what shape they're in. Your estimate spells out what needs doing first and what your house can skip.
We permit, seal and insulate
If the city needs a permit, the work starts once that's in place. Then our crew seals the gaps and insulates, with me running the job.
Walk through the finished job
When we're done, I walk you through what we sealed and how deep the new insulation sits. If we sprayed foam, I tell you up front when the kids and pets can come back inside.
Seaside insulation questions answered
Do I need a permit to insulate my attic in Seaside, CA?
Check with the city before work starts, because Seaside's Building & Code Enforcement Department recommends that owners ask whether a project needs a permit. You can ask at the Permits & Inspections counter in City Hall or email building@ci.seaside.ca.us. If your job needs a permit, the filing is part of our job.
Does an insulation contractor need a California license to work in Seaside?
Yes, if the job needs a building permit, uses any workers beyond the contractor, or comes to $1,000 or more in labor and materials, and most attic jobs hit at least one of those. A larger job can't be split into smaller contracts to get under that $1,000 line.
Which building codes apply to an insulation job in Seaside?
Projects submitted to the city after January 1, 2026, have to meet the 2025 California codes, including the energy code, along with Seaside's own local amendments. Those are the codes we do the job to.
How much does attic insulation cost in Seaside, CA?
I can't give a fair number until I've seen your attic, because the price turns on what's up there now, what has to come out and how much sealing comes first. Spray foam costs more and seals air as it insulates. For most Seaside attics, though, sealing the gaps and topping up with loose fill is the better value, unless your ductwork runs through the attic. The estimate gives you your own figure.
How do I know if my Seaside attic needs more insulation?
Look in from the hatch with a flashlight. If the tops of the ceiling joists show through or the edges look thin, it needs more. Hot upstairs rooms and a power bill that keeps climbing are other signs worth a look.
What is the best way to insulate a crawl space in a Seaside home?
Deal with the ground first, then insulate under the floor, because insulation over wet ground soaks up moisture and stops doing its job. If the dirt down there is damp, we put down a vapor barrier before the insulation goes in. If it's dry, we go straight to the floor.
Tell us what your Seaside house is doing
We take calls until 11 PM on weeknights and 10 PM on weekends, so call (831) 920-0697 or use the form when you notice the problem, and tell us which room bothers you so I know where to look first.





