Open-cell foam insulation in Seaside CA - a quieter attic that holds the temperature

Hot upstairs rooms, drafts and a high power bill usually start in the attic. We seal and insulate it so the house stays comfortable.

Request an estimate (831) 204-4546

A worker in protective gear sprays mint-green foam insulation between the exposed ceiling joists of a framed house.

Is open-cell spray foam right for my attic?

Open-cell foam insulation is a soft spray foam we apply under the roof deck, in walls or between floors in Seaside homes, where it slows heat, cuts noise and fills the gaps that air would otherwise leak through.

Most calls start with a hot upstairs, a room over the garage that never feels right, or a power bill that won't come down, and in a lot of these houses the ducts run through an attic that leaks air in every direction. The price turns on how many square feet of roofline or wall we're covering, how thick the foam goes, and whether old insulation has to come out first through insulation removal. The schedule turns on that same prep, any roof repair you need ahead of us, and the time your household has to spend out of the house. I measure all of it when I come out, and you'll see your own figure on the estimate I write.

How we install open-cell foam insulation

I start with the roof, because foam sprayed under the deck will hide a leak until the wood rots, so any leak or damage gets repaired first, and if the roof is near the end of its life I'll tell you to plan the replacement before we spray. I also look at the old insulation and the wiring up there, since foam laid over a soaked or dirty attic or tired wiring just buries the problem. Open-cell won't hold back moisture by itself, so before we spray we work out with you how the attic will handle moisture once the vents are closed, and what happens with any furnace or water heater up there once the space is sealed. Then our installers protect what needs covering, spray the foam to the depth we agreed on, trim it back and clean up, and I walk through the finished attic with you so you know exactly what we did and why.

A sealed attic deals with the roof, not the ground, so if your house sits over a damp crawl space, a crawl space vapor barrier is the separate job that handles that side. Landlords and property managers with shops, offices or larger rental buildings can ask about commercial insulation on the same call.

Under the roof deck when the ducts are up there

This suits houses with ductwork or a furnace in the attic, because foam on the underside of the roof brings that space inside the house instead of leaving the ducts out in the heat and cold. Foam costs more than sealing the gaps and topping up loose fill, so if your ducts aren't in the attic, I'll usually point you to the cheaper route.

Open walls and the floor over the garage

Open-cell works well in walls that are open during a remodel and in the floor of the room over the garage, because it expands around wires and pipes and fills the gaps that let cold and noise through. It's a good fit when you want that room quieter and easier to keep warm.

Why Seaside homeowners call Evergreen Seaside Spray Foam Insulation for open-cell foam

The owner looks before writing your price

I come out to look at the job and write the estimate myself, so the person pricing your attic is the same one who checked the roof deck, the old insulation and the vents. Our installers do the spraying, and when they're done I walk through it with you.

Years of upkeep work behind every quote

I spent years doing upkeep for a property management company before I started this business in Seaside in 2023. That's a lot of attics and crawl spaces, and it's why we look hard at the space and seal the leaks before any insulation goes in.

Licensed and fully insured, with a guarantee

We're licensed and fully insured for the work our installers do in your attic. The job is backed by our satisfaction guarantee, and you'll know exactly what we sprayed and why. Call (831) 204-4546 or use the form to set up a visit.

Get an open-cell foam estimate for your attic

Send the form or call (831) 204-4546, and we'll reply within one business day to set a time for a free on-site estimate, with no obligation. I'll come out myself to look at the attic and roof and write the estimate, so it helps to have the attic size, the roof's age and any furnace or water heater up there in mind.

Phone: (831) 204-4546
Email: office@seasidesprayfoaminsulation.com
Location: Seaside, CA 93955
Hours: Mon–Fri: 7 AM–11 PM, Sat–Sun: 6 AM–10 PM

Open-cell foam insulation and permits in Seaside

Seaside recommends that owners contact its Building Department before any building project or major repair to find out whether the work needs a permit, so we don't guess on that for a foam job. Before we start, we check with the city for your address, and where a permit is needed we take care of the paperwork and set up the inspections. New projects in Seaside also have to meet the current California codes along with the city's own amendments. We're based in Seaside and work in cities across Monterey County, into Santa Cruz County and over to Gilroy, and we check with the city or county building office for each address the same way.

Near the bay, salt air is the other thing I look at. National building guidance notes that salt spray corrodes steel framing, metal trusses and the metal plates that hold trusses together in vented attics, and that it stops being a problem once the attic is sealed and part of the house, which is one more reason a sealed attic makes sense close to the water in Seaside, Monterey and Pacific Grove. A sealed attic also keeps out the embers and ash that get in through attic vents, which matters where houses sit close together.

Questions Seaside homeowners ask about open-cell foam

How much does open-cell spray foam insulation cost in Seaside?

Across the US, open-cell spray foam usually costs about $1 to $1.75 per square foot for each inch of thickness. Your own figure depends on how much roofline or wall gets covered, how deep the foam goes and any prep like removing old insulation. I measure for all of that when I write your estimate.

What is the best way to choose between open-cell and closed-cell spray foam?

Choose by whether the foam has to stop moisture as well as heat. Open-cell lets water vapor pass through, so it can't be the layer that holds moisture back, while closed-cell can handle heat and moisture in one layer. When the foam has to do both jobs, closed-cell foam is the one, and when it's there for temperature and sound, open-cell does that job well.

How long do we have to stay out of the house after spray foam insulation?

Plan for everyone, kids and pets included, to be out while we spray and for at least 24 hours afterward, as spray foam safety guidance advises. Most families book a night with relatives or at a hotel, and I'll go over our safety steps with you before the day. If anyone in the house has asthma, respiratory allergies, a skin condition or has reacted to spray foam before, tell me at the estimate so you can read the product information first, and we can talk about a different insulation if that's the safer call.

Does open-cell spray foam in the attic need a fire covering?

Sometimes, depending on the foam. Some products need a thermal or ignition barrier over them, such as a special coating or drywall, because the maker calls for it or the code requires it, and others don't. We check what the foam we're using needs and build it into the plan before we spray.

What license does an insulation contractor need in California?

California's C-2 insulation and acoustical classification covers contractors who install any insulation for temperature or sound control, and spray foam falls under that. It's fair to ask any contractor you're talking to which license they hold before you sign.