Closed-cell foam insulation in Yakima, WA - a sealed layer where moisture is a worry
Cold floors over a crawl space or a damp roof deck? We spray a dense foam that insulates, seals air and keeps moisture out.

- Licensed and insured.
- Free on-site estimates.
- Replies within 1 business day.
Is closed-cell foam the right insulation for your Yakima home?
Closed-cell foam insulation is a dense foam we spray onto a roof deck, crawl space or exterior wall in Yakima. In one layer it insulates, stops drafts, blocks moisture and stiffens the framing it's sprayed onto.
Most calls about closed-cell foam start with a cold floor over the crawl space, a room over the garage that never stays comfortable, or a roof someone wants insulated from underneath, and often the owner is weighing it against crawl space insulation done another way. The price turns on how many square feet we cover and where. A roof deck costs the most because the crew sprays overhead and the code calls for thicker coverage there, while a crawl space wall goes quicker. The schedule turns on whether the roof or crawl space needs fixing before we start and on when your household can be away while the foam cures, and my written estimate gives you the figure for your house.
How do you know your house could use closed-cell foam?
Cold floors over the crawl space
If the floors stay cold all winter and you can feel air at the baseboards, the crawl space is usually open to outside air with little stopping it. Wait on it and you keep paying to heat air that leaks straight out, while any damp down there keeps working on the floor framing.
Hot room over the garage
A bedroom that's hot upstairs in summer and cold in winter usually has thin insulation and open gaps where it meets the garage ceiling or the roof. It doesn't fix itself, so the power bill carries the difference every month.
Stains or a musty smell up top
Dark spots on the roof sheathing or rafters, or a musty smell in the attic, usually mean water is getting in, from a leak or from warm house air condensing on cold wood. Foam sprayed over that only hides it, so call before the rot has time to spread.
How we install closed-cell foam insulation
I look over the roof or wall the foam is going on before anything else, because closed-cell is the denser foam and it earns its cost where moisture is a worry, and foam sprayed over a leak only hides the leak. A leaking roof gets fixed before we spray. Roofing is outside our work, so I'll tell you plainly when the job isn't ready yet. Once it is, our crew clears and masks the area, seals the gaps around pipes, wires and the hatch, and sprays the foam in passes until it's as deep as the job calls for. The crew keeps the edges as full as the middle, because thin edges are where most foam jobs fall short. Then we clean up and air the space out.
Closed-cell isn't the only foam we spray. Open-cell foam insulation is the lighter, softer foam, and we install it where moisture isn't the concern. We also do commercial insulation for property managers, and closed-cell often goes on those buildings' walls and roof decks too.
Under the roof deck
This suits a roof that will have rooms, ductwork or a furnace under it, because one dense layer seals the whole roofline instead of just the attic floor. It's the most work per square foot, so we only recommend it when the attic calls for it.
Crawl space walls and rim joist
This suits a damp crawl space, because the foam blocks moisture and keeps cold air off the floors above. We also cover the rim joist, the band of wood that sits on the foundation, which is a common place for drafts to get in.
Exterior walls and garage ceilings
This suits rooms over the garage and walls opened up during a remodel. Because the foam is denser, it needs less thickness to do the same job, which helps in shallow wall cavities.
Get a closed-cell foam estimate for your roof, walls or crawl space
Send the form and we'll get back to you within one business day to set a time. I come out myself, look at the job and write up a free estimate, with no obligation.
- Based in
- Yakima, WA 98901
- Hours
- Mon–Fri: 8 AM–9 PM, Sat–Sun: 6 AM–9 PM
What happens after you call about closed-cell foam in Yakima?
Here's how a closed-cell job goes from your first call to the walk-through, and who you'll deal with at each step.
Call or send the form
Tell us what's going on and where, and we'll set a time for me to come out. If the roof has ever leaked, mention it then.
I look and write it up
I come out myself, look at the roof deck, crawl space or walls, and explain what I see before I write anything down. The estimate covers what has to be fixed first, where the foam goes and what it costs, so you see the whole job before you decide.
Prep and sealing, then foam
Our crew does the prep and sealing first and the foam after. Spray foam depends on air and surface temperature, humidity and dry surfaces, so we may adjust the heat inside or move the spray day, and I'll tell you ahead of time how long you'll be out of the house.
Walk-through before we leave
I go over the finished work with you before we leave, so you can see the coverage at the edges as well as the middle. Ask anything you like then, and I'll answer it on the spot.
Why Yakima homeowners call C&D Yakima Insulation Solutions for closed-cell foam
I look at every job myself
I come out to see your house and write the estimate myself, and I'm on site checking while our crew sprays. The person who told you what the job needs is the one checking it gets done.
In business since 2017
We've run this business since 2017, and before that I spent years framing houses. I know how a roof and a wall go together, so I can spot what will trap water before any foam goes on.
Licensed and insured on every job
We're licensed and insured on every job, in Yakima and in the cities around it. You can check any contractor's state registration before you sign, and I'd rather you did.
Satisfaction guaranteed on every job
Satisfaction guaranteed on every job is the promise we make on foam work and everything else. If something about the finished work doesn't sit right, tell me at the walk-through.
The roof or wall under the foam has to be sound before we spray, so when you get in touch, tell us about any leaks or damp spots you've seen.
Closed-cell foam, roof prep and permits in Yakima
Remodel permits in Yakima go through the City of Yakima Codes office. For a remodel, the city asks for a building permit application with existing and proposed floor plans, wall details and state energy code worksheets where they apply, and two sets of plans if you apply in person or by mail. Whether a foam job on your house needs a permit isn't something I'll guess at. If it does, we take care of the application with the city or county office that covers your address, and if we're not sure yet, we tell you that up front and find out.
A lot of what we see is older houses with roofs that have been patched more than once, rooms built over garages, and crawl spaces nobody has looked at in years, so the roof check and the damp check come first on nearly every job. We see the same houses on jobs in Selah and Union Gap, and we handle them the same way.
Questions about closed-cell foam in Yakima
How much does closed-cell spray foam insulation cost in Yakima?
Installed closed-cell spray foam usually costs about $3 to $5 per square foot across the US. That's the going rate nationally, not a quote from us. Where the foam goes moves the price most, with roof decks at the high end for the reasons above, and my on-site estimate gives you the number for your house.
Is closed-cell or open-cell spray foam better for my house?
Closed-cell is usually the right choice for roof decks, crawl spaces, exterior walls and anywhere moisture is a risk, and open-cell is usually the better buy for quieting interior walls. One cost guide says the higher upfront price of closed-cell usually pays for itself in those spots, because the foam acts as its own vapor barrier and you skip installing a separate one. I'll tell you which one your space calls for once I've seen it.
How long does it take before we can go back in the house after spray foam?
You can go back in once the foam has finished curing and the house has been aired out and cleaned, which is what EPA guidance says. Some foam makers recommend 24 hours, but the time varies by product, so I confirm it for the foam we're using. Line up a place to stay for everyone, pets included, before spray day.
Who is allowed to install spray foam insulation in Washington?
Washington requires every construction contractor to register with the state Department of Labor and Industries, known as L&I, and to be bonded and insured. You can look up any installer in L&I's Verify a Contractor, Tradesperson, or Business tool before you sign anything.
Can you spray closed-cell foam under an old roof?
Sometimes, but any leaks have to be fixed and the damage repaired before the foam goes on, and a roof near the end of its life may need replacing first. That can mean a roofing bill before the insulation bill. I'll tell you at the estimate if I think your roof is at that point.
What is the best way to insulate an attic with ductwork in it?
When ductwork or a furnace sits in the attic, foam on the underside of the roof usually makes sense, because it puts that equipment inside the insulated part of the house. The same goes for an attic you plan to turn into living space, a roof that's hard to vent, or a ceiling with gaps that are hard to close off. If none of that fits your attic, sealing the gaps and topping up blown-in loose fill on the attic floor usually wins on cost, and I'll tell you so.
Other insulation work that pairs with closed-cell foam
Open-cell foam insulation
Worth a look if you're quieting a bedroom or office wall inside the house, where noise matters more than moisture and the lighter foam costs less.
Commercial insulation
For property managers and owners of shops, offices or larger rentals who need insulation planned around tenants, work schedules and the building's own roof and walls.
Cities we serve around Yakima
C&D Yakima Insulation Solutions is based in Yakima, Washington, and does closed-cell foam work in the eight cities listed here, from Terrace Heights to Sunnyside. If your city isn't on the list, call and ask.
Get your closed-cell foam estimate booked
Have the areas you want insulated, the roof's condition and any leak history in mind when you call (509) 517-6081, so the visit gets straight to what matters.
