Insulation Contractor in Hermiston, OR - Warmer Floors and Sealed Attics
Reliable Kennewick Insulation Services is an insulation contractor in Kennewick, WA, working across the state line in Hermiston. We seal the gaps in attics, crawl spaces and walls, then insulate them for homes with cold rooms or climbing power bills.

- Fully licensed and insured.
- Free on-site estimates.
- Expect a reply within 1 business day.
Insulation work in Hermiston, Oregon
Hermiston is a short drive from our base in Kennewick, and the calls we get here sound like the ones at home: a cold back bedroom, a hot upstairs, a power bill that keeps climbing. Some come from landlords with rentals and owners of shops and offices. The houses range from older single-story homes over crawl spaces to newer two-story builds with wide attics, much like what we see just up the road in Umatilla.
In an older house we usually have to deal with what's already in the attic or crawl space before adding anything, while a newer one is more often a matter of sealing gaps and topping up. That's what moves the price and the schedule, along with the material you pick and whether the city wants a permit, and your estimate spells out what we plan to do and why.
Insulation services for Hermiston homes
Spray foam insulation
Where ductwork runs through the attic, spray foam seals and insulates the roof deck at once. It costs more, so we save it for attics like that.
Explore Spray foam insulationAttic insulation
Hot upstairs rooms usually start in the attic, so we measure what's up there and build up the thin edges, not just the middle.
Explore Attic insulationBlown-in insulation
Blown-in is loose fill we send through a hose, and on attics with old, settled fill it's usually the simplest way to top up.
Explore Blown-in insulationHome insulation
For a whole Hermiston house, we look at the attic, walls and crawl space together, then tell you which one costs you most.
Explore Home insulationInsulation removal
Old insulation that got soaked or holds droppings comes out first, because new material laid over it keeps the problem.
Explore Insulation removalCrawl space insulation
Cold floors in older single-story Hermiston homes usually start in the crawl space, so we seal the gaps there and insulate under the floor.
Explore Crawl space insulationWall insulation
Older houses here sometimes have empty or thin walls. We can fill closed walls through small holes instead of tearing out drywall.
Explore Wall insulationAir sealing services
Drafty rooms usually come from gaps around pipes, wires and outlets. Air sealing closes them before any insulation goes in.
Explore Air sealing servicesBasement insulation
Where a Hermiston house has a basement you plan to finish, we insulate the walls first, while they're still open and easy to reach.
Explore Basement insulationClosed-cell foam insulation
Closed-cell foam is dense and blocks moisture, so we reach for it on crawl space walls and other spots that stay damp.
Explore Closed-cell foam insulationOpen-cell foam insulation
Open-cell foam is softer than closed-cell, and it suits the room over the garage or an odd roofline where moisture isn't a concern.
Explore Open-cell foam insulationCommercial insulation
For shops, offices and rentals in Hermiston, we plan the work around your hours so customers and tenants aren't working around our crew.
Explore Commercial insulationCrawl space vapor barrier
A vapor barrier over a dirt crawl space floor keeps ground moisture out of your insulation and framing. We overlap and tape the seams.
Explore Crawl space vapor barrierVapor barrier installation
On the wrong side of a wall, a vapor barrier traps moisture, so we place it for the way your house heats and cools.
Explore Vapor barrier installationAttic air sealing
Can lights, pipes and the attic hatch are the usual leaks in a Hermiston attic. We seal them before blowing in an inch.
Explore Attic air sealingRetrofit insulation
Older homes in Hermiston weren't built to today's levels, so retrofit work adds insulation to the house you have without opening every wall.
Explore Retrofit insulation
What Hermiston homes ask of the work
I come out to look at each job myself and write out what we plan to do and why, so you know what you're paying for. Our installers seal the gaps before any insulation goes in, and I check their work before we finish.
Full depth out to the edges
We carry full depth out to the edges of the attic, where it's usually thinnest, and keep the eave vents clear so the attic can still breathe.
Problems named up front
If old fill is soaked, a pipe leaks or something needs fixing first, I'll tell you plainly at the estimate rather than bury it under new insulation.
Crawl spaces checked to the back wall
Many houses here sit over crawl spaces, and the back wall is where gaps and missing insulation hide. We go all the way back, since nobody checks it after we leave.

Get a written insulation plan for your Hermiston home
Tell us what's bothering you, like a cold room, a hot upstairs or a climbing power bill, and we'll reply within one business day. I come out myself for the free on-site estimate, and there's no pressure to book.
Hermiston insulation questions
Do I need a permit to add insulation to my house in Hermiston?
The city's permit list doesn't name insulation on its own, so we ask the Hermiston Building Department before work starts and take care of the permit with them when one is needed. That list does call for a building permit on remodels, additions and turning garage space into living space, so if insulation is part of making the garage into a bedroom, that project needs one. Under state guidance, whoever does the work is responsible for the permits, and a contractor applies with the city online.
Does an insulation contractor need a license to work in Hermiston, Oregon?
Yes, the Oregon Construction Contractors Board says state law generally requires a license for anyone paid to do construction work that improves a home. The City of Hermiston also requires a business license, renewed each year, for anyone doing business in the city, including companies based elsewhere that work there for a while. We're fully licensed and insured, and it's fair to ask any contractor you're weighing about both.
How much does insulation cost for a house in Hermiston?
The cost depends on the size of the space and what has to happen before new insulation goes in, so we price it after seeing your house. The biggest swings come from old soaked or dirty insulation that has to come out, how many gaps need sealing and how hard the space is to reach. Foam costs more because it seals while it insulates, and in most attics sealing the gaps and topping up loose fill is the better buy unless your ductwork runs up there.
What causes cold floors in Hermiston houses in winter?
Cold floors usually come from a crawl space with open gaps and thin or fallen insulation under the floor. Hermiston gets freezing weather, and the city shuts its park restrooms through the winter, usually November through March, because freezing can burst pipes, so an open crawl space puts your water lines at risk too. We seal the openings, insulate under the floor and lay a vapor barrier over a dirt floor so the insulation stays dry.
What happens before an insulation job starts in Hermiston?
I come out to look at the house myself, we write out what we plan to do and why, and we settle the permit question with the city as described above. For construction work, the city also wants a blowing dust control plan before any work begins, naming someone it can reach around the clock, and it runs a zoning review before issuing new structural permits. Most insulation work inside an existing house isn't structural, but we ask which of these steps apply to your job rather than assume.
How long does attic insulation take in Hermiston, and do we have to leave the house?
For air sealing and blown-in insulation, most families stay home, and the time we spend in your attic depends mostly on how much old material has to come out first. Spray foam is different, because you'll stay out until the re-entry time the foam maker sets has passed, before people and pets come back in. We tell you how long that is for the product we'd use when we go over the estimate.
Other cities we serve, and yours
Choose your city if it's listed, or call (509) 396-5461 if it isn't, because we work in other cities on both sides of the state line too.




