Insulation contractor in Sunnyside, WA - warmer rooms, sealed attics
C&D Yakima Insulation Solutions insulates attics, crawl spaces and walls for homeowners, landlords and businesses in Sunnyside, WA, closing the air gaps first so the new insulation keeps rooms comfortable instead of fighting a draft.

- Licensed and insured.
- Free on-site estimates.
- Replies within 1 business day.
Sunnyside houses and what we find inside them
We're an insulation contractor based in Yakima, WA, and our Sunnyside calls come from a real mix of houses. There are older homes in the blocks around downtown, single-story ranch houses sitting over crawl spaces, newer houses in the subdivisions and rentals that landlords want comfortable without a remodel, much like what we see in Grandview and Toppenish.
I framed houses for years before I started this business in 2017, and that work taught me that the age of a house shapes an insulation job more than its size does. An older Sunnyside attic usually has a few inches of settled material and gaps around the fixtures and the hatch, and a crawl space job often comes down to whether the ground under the floor stays dry.
Insulation services for Sunnyside homes and buildings
Spray foam insulation
For the room over the garage or a sloped ceiling upstairs, spray foam fills awkward framing and seals air in the same pass, which loose fill can't do.
Attic insulation
Older attics here often have a few inches of old, settled material, so we seal the gaps and bring the depth up evenly, edges included.
Blown-in insulation
Loose fill blown in through a hose is the usual way we top up an open attic on a ranch house, because it tucks around wiring and framing.
Home insulation
When a Sunnyside house has cold floors, a drafty bedroom and a high power bill all at once, we look at the attic, walls and crawl space together.
Insulation removal
In older Sunnyside homes and rentals, old insulation that's soaked or full of droppings comes out first, because new material on top just keeps the problem.
Crawl space insulation
A lot of single-story homes here sit over a crawl space, and insulating under the floor is how we take the chill off cold floors in winter.
Wall insulation
Older houses near downtown often have empty or thin wall cavities, and we can fill them through small holes without tearing the walls apart.
Air sealing services
Drafty older homes and rentals here usually leak air around pipes, wires and trim, so we close those gaps before any new insulation goes in.
Basement insulation
Where a house here has a basement, the bare concrete walls and the framing on top of them usually let the cold in, so we start there.
Closed-cell foam insulation
Closed-cell foam, dense foam that blocks moisture as it insulates, suits a damp crawl space wall or a metal shop building where fiberglass would hold water and sag.
Open-cell foam insulation
In newer homes with ductwork in the attic, open-cell foam sprayed under the roof keeps the ducts on the comfortable side, and it costs less than closed-cell.
Commercial insulation
We insulate walls and ceilings in shops, offices and small warehouses around Sunnyside, and we plan the work around the hours the building is open.
Crawl space vapor barrier
Bare dirt under crawl space homes here gives off moisture, so a heavy plastic sheet over the ground keeps that damp out of the framing and insulation above.
Vapor barrier installation
In a remodel or garage conversion, we put the moisture barrier on the side it belongs on, so damp air from inside doesn't condense in the new insulation.
Attic air sealing
Can lights, plumbing pipes and the attic hatch are the usual leaks in older ceilings, and sealing them first keeps heated air from slipping up into the attic.
Retrofit insulation
For a lived-in house or a rental between tenants, retrofit work adds insulation to finished walls, attics and floors without a remodel.
Get a free estimate for insulating your Sunnyside home
Send the form and we'll get back to you within one business day to set a time. I come out myself, look things over and write a free estimate, with no obligation to go ahead.
- Based in
- Yakima, WA 98901
- Hours
- Mon–Fri: 8 AM–9 PM, Sat–Sun: 6 AM–9 PM
Permits, prep and price on a Sunnyside job
In Sunnyside, building permits come from the city's Building Division, which also does the inspections, and the city expects the owner or someone acting for the owner to have any required permit before regulated work starts. The city's list of work that needs no permit covers things like painting and small sheds and doesn't name insulation, so I don't assume your job is exempt. If it needs a permit, we take care of the application, and if we're not sure yet, we tell you up front and find out before the crew is booked, because a permit and its inspection can set the start date. We're licensed and insured.
We come down I-82 from Yakima for Sunnyside jobs, the same highway that takes us north to Ellensburg, so a job here gets the same crew and the same visit from me as one in town. What moves the price is what's already in the house, mostly how much old material has to come out, how many gaps need sealing, how easy the attic hatch or crawl space is to get into and how much area we're covering. The schedule turns on that prep and on any permit, and you get your own number in the estimate I write up after I've seen the job.
What older Sunnyside houses need before new insulation
Older attics around Sunnyside tend to fight their own insulation. Air pulls up past can lights, plumbing pipes and the hatch, the old material has settled thin at the edges where the roof comes down low, and earlier top-ups sometimes buried the vents along the roof edge, so the attic stops breathing and moisture shows up in the framing. That's why the upstairs runs hot and the power bill climbs even with insulation up there, and it's why we seal those gaps, keep the vents clear and build the depth up evenly out to the edges instead of piling it in the middle.
Rentals add their own pressure, because a landlord wants rooms tenants stop calling about without opening up a finished house. On those we sort out what has to come first, usually sealing and topping up the attic, and I'll say plainly if a leak or old wiring needs dealing with before insulation is worth buying.
What to expect from your Sunnyside insulation job
Here's how it runs from your first call to the walkthrough, including who shows up at your house and when you need to be there.
Call or send the form
Call (509) 517-6081 or use the form, and we get back to you and set a time for me to come out. Tell us what you've noticed, like a hot upstairs, a drafty bedroom or cold floors, so I know where to look first.
I look and write it up
I come out myself, go into the attic, crawl space or walls and explain what I see while you're there to ask about it. Then I write up the estimate, and if a leak, a damp spot or old wiring has to be fixed first, I'll tell you plainly rather than sell you insulation the house isn't ready for.
Our crew seals, then insulates
Once any permit is in hand, the crew does the prep and air sealing first and the insulation after, and I'm on site checking the work as it goes. If the job uses spray foam, we'll have settled ahead of time when you step out and when you come back.
Walk through it together
Before we leave, I go over the finished work with you, edges, vents and hatch included. If anything looks off, say so while I'm standing there, because it's satisfaction guaranteed on every job.
Questions about insulation in Sunnyside
How do I apply for a building permit in Sunnyside, WA?
You apply online, since the city takes every permit application that way through the online permitting program linked from its Forms & Permits page. On an insulation job that needs a permit, we handle the application for you, so you usually won't have to file anything yourself.
What building and energy codes apply to insulation work in Sunnyside?
Insulation work in Sunnyside falls under Washington's current building codes and the Washington State Energy Code, which the city's Building Division says took effect on March 15, 2024. The energy code is the one that speaks to insulation, so I go over what it means for your attic, walls or crawl space when I write up the estimate.
How much does attic insulation cost in Sunnyside, WA?
The price comes from what's in your attic now and what has to happen before new insulation goes in, so I give it after seeing the job rather than over the phone. The biggest choice is material, because foam costs more and seals air as it insulates, while sealing the gaps and topping up with loose fill usually does the job for less in most attics. I lean toward foam when your ductwork runs through the attic, since the ducts then end up on the comfortable side.
How long does an insulation job take, and can my kids and pets stay home?
Most of the time goes into prep, so I give you the schedule at the estimate instead of guessing on the phone. With air sealing and blown-in work, families usually stay home and just keep kids and pets away from the work area. Spray foam is different, so you'll be out of the house until the re-entry time, the point when it's safe to come back in, and I'll tell you that before we book.
What causes cold floors in older Sunnyside homes?
Cold floors usually come from a crawl space with little or no insulation under the floor, plus outside air pulling in where the house sits on its foundation. Bare dirt down there also gives off moisture that can soak the framing and any insulation hung under it, which is why we lay a vapor barrier over the ground before insulating when the crawl space needs one.
Should I put new insulation over the old insulation in my Sunnyside attic?
Only if the old insulation is dry and clean, because new material laid over soaked insulation or rodent droppings keeps the problem in your attic. I check that at the estimate, and if it has to come out, we remove it and seal the gaps before anything new goes in.
Ask about insulating your Sunnyside home
A look at the attic or crawl space now tells you whether it's ready for insulation or needs a fix first, so your money goes into rooms that actually feel better.




