Crawl space insulation in Yakima, WA - warm floors over a dry crawl space
Cold floors and a high power bill usually start under the house. We fix the damp first, then insulate so the rooms above stay warm.

- Licensed and insured.
- Free on-site estimates.
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What does crawl space insulation fix in a Yakima house?
Crawl space insulation in Yakima keeps the heat in your rooms from leaking into the space under your house. We use batts or spray foam, or some of each, either against the floor or along the crawl space walls, so your floors stop feeling cold.
Most people call me because the floors are cold or the power bill keeps climbing, and the trouble is usually right under their feet. The price depends on the size of the crawl space, how much room there is to work down there, whether old insulation has to come out, whether we insulate the floor or the walls, and whether there's water to deal with first. Water also moves the schedule more than anything else, because we don't close anything in until the space underneath is dry, and sometimes that means drainage trouble or a crawl space vapor barrier comes first. After I've been under the house, the estimate I write up gives you your own number and the order the work should go in.
How can you tell your crawl space needs insulation?
Floors cold underfoot
If the floors stay cold even with the heat turned up, the floor above the crawl space is usually bare or the insulation down there has slipped. Every month you wait, you're paying to heat the dirt under your house.
Insulation hanging or fallen
When you open the crawl space hatch and see batts sagging from the joists or lying on the ground, they've usually gotten wet or were never held up properly. Fallen insulation does nothing, and wet batts hold moisture against the wood the longer they sit.
A musty smell inside
A damp, musty smell in the rooms over the crawl space usually means moisture is building up underneath. I want to find that before any insulation goes in, because covering it up only hides a problem that keeps working on the wood.
How we do crawl space insulation
The first choice is whether to insulate the floor above the crawl space or the crawl space walls, and I make that call with you once I've seen what's down there, like ductwork, water lines, vents and the condition of the ground. Before anything new goes in, we sort out any water or drainage trouble, pull out insulation that's soaked or fouled, and seal the holes in the subfloor where pipes and wiring come through, because insulation with a draft blowing through it doesn't do much. Then the crew fits the insulation tight between the joists or along the walls with no gaps or squashed spots, and we clean up the crawl space before we close the hatch.
A cold floor is often only part of it. If the rooms above still feel drafty, the walls may be bare too, and wall insulation takes care of that. Drafts usually come through gaps more than thin insulation, so our air sealing services close the openings around pipes, wiring and where the house sits on the foundation before anything gets covered.
Insulating the floor above
This suits a vented crawl space with no ductwork or water lines that need to stay warm, because the floor becomes the line between your heated rooms and the outside air. It usually costs less, and with the gaps sealed first, it's what I'd pick for most houses where nothing heated sits down there.
Insulating the crawl space walls
This suits a crawl space with ductwork, a furnace or water lines in it, because insulating the walls brings the whole space inside the house instead of leaving it out in the cold. It costs more and often uses foam that seals air as it insulates, and it only works once the water is handled and the vents and ground cover are planned.
Get a free crawl space estimate from the owner
Send the form and we'll get back to you within one business day to set a time. I come out myself, look under the house and write up a free estimate, with no pressure and 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 your crawl space
Here's how a crawl space job runs from your first call to the walk-through, and who you'll be dealing with at each step.
Call or send the form
You call (509) 517-6081 or send the form with a few details about the house. We get back to you and set a time for me to come out.
I look under your house
I come out myself, go into the crawl space and explain what I see, including any water, mold or a furnace or water heater down there. The estimate tells you whether we're insulating the floor or the walls, what has to happen first and the price, so you can see where the money goes before you decide.
Prep and sealing, then insulation
Our crew does the prep and sealing first and the insulation after, and I'm on site checking the work as it goes. If something needs to dry out or get fixed before we go further, I tell you plainly.
Walk through the finished work
Before we leave, I go over the finished crawl space with you and show you what we did. I'll also tell you what to keep an eye on, like a wet spot coming back.
Why Yakima homeowners call C&D for crawl space insulation
The owner looks at every job
I come out myself to see each crawl space and write the estimate, and I'm back on site checking while the crew installs. The person who priced your job is the one making sure it's done the way the estimate says.
A framer's eye on your floor
I framed houses for years before I started this business in 2017, so I know what a floor system should look like and notice when a joist is wet or has been cut where it shouldn't be. Those are the things worth fixing before they get covered up.
Licensed in Washington, insured every job
We're licensed and insured, so the risk of a crew working in a tight space under your floor isn't left with you. You can look us up with the state yourself, and the questions below show how.
On a crawl space, the order of the work matters more than the insulation itself. Send us a few details or call (509) 517-6081, and I'll come take a look.
Crawl space insulation and permits in Yakima
City of Yakima Codes handles building permits here, and the list of work on its online permit portal names jobs like reroofing, re-siding and plumbing, not crawl space insulation. That list doesn't settle whether your job needs a permit. If it does, we take care of the application with the city or county office that covers your address, which in Yakima means filling out the city's application packet and turning it in with plans. If we're not sure yet, I'll tell you that up front and find out before we start.
We're based in Yakima and work across the city and the cities around it. A lot of the older houses we see sit over vented crawl spaces, and some have a furnace or water heater down there, which changes what we can safely close up. We see the same mix of crawl spaces on jobs in Selah and Union Gap, so we plan around what's actually under your floor.
Questions about crawl space insulation in Yakima
How much does crawl space insulation cost in Yakima?
Across the US, insulating a crawl space usually costs about $3 to $6 per square foot, and that's the going range, not our price. Where your job lands depends on the square footage, floor or walls, batts or foam, and whether water or old insulation has to be dealt with first. I'll put your own figure on the estimate after I've seen the crawl space, and like all our work it comes with satisfaction guaranteed on every job.
Should I insulate my crawl space floor or the crawl space walls?
The Department of Energy calls air sealing and insulating the crawl space walls a best practice in every climate, because it makes the crawl space part of the house. Plenty of homes still use the floor above as the line between heated rooms and outside air, so either can be right. Which one suits your house is in the options above, and it mostly comes down to whether ductwork or water lines run through the crawl space.
What needs to be done before insulating a crawl space?
Any water and drainage problems in and around the crawl space get fixed before the walls are sealed and insulated, so the space stays dry once it's closed in. An older federal guide also says that surface mold calls for a certified mold remediation expert to inspect it and set a cleaning plan before the work goes ahead. Tell me about any water or mold you've seen when you call, and I'll look for it first.
Can I just close the vents in my crawl space?
Not by itself, because sealing the vents without the rest of the work can raise the moisture down there. If a gas furnace or water heater in the crawl space draws its air from the space naturally, closing the vents could create a deadly situation. When a crawl space does get closed up, a well-installed vapor barrier on the ground helps hold back ground moisture and soil gases like radon, and an older ENERGY STAR reference lists a drying system such as conditioned air or a dehumidifier.
How do I check if an insulation contractor is registered in Washington?
Use the state's Verify tool from Labor & Industries, which shows whether a business has an active contractor registration and a paid-up workers' comp account covering its employees. It also lists safety violations and any lawsuits against the contractor's bond. It takes a minute, and it's worth doing for anyone you're thinking of hiring, us included.
How long does crawl space insulation take, and do we have to leave the house?
You usually don't have to leave, because the crew works under the floor and comes and goes through the crawl space access. How long we're there depends on the size of the space, how much room there is to move and whether water or old insulation has to be handled first, and I'll tell you when I write the estimate. If we're spraying foam, I'll tell you before we start how long you, the kids and the pets need to stay out.
Related work that keeps the cold out
Wall insulation
Rooms that stay drafty after the floor is done often have bare or settled walls, and filling them finishes the job of keeping heat in the room.
Air sealing services
Most drafts sneak in through small gaps around pipes, wires and the attic hatch, and closing those first lets any insulation you add actually do its work.
Cities we cover from our Yakima base
C&D Yakima Insulation Solutions is based in Yakima, WA, and we work across the city and the cities around it, including Ellensburg and Sunnyside. These 8 cities have their own pages, and if yours isn't one of them, call and ask.
Book a look under your house
Have a rough size of the crawl space, whether it has vents, and any water or mold you've noticed ready when you call, so I know what to look for when I come out.
