Greater Seattle / Puget Sound · Crawlspace Medic of Seattle
Crawl Space Encapsulation in Seattle, WA
Crawl space encapsulation, waterproofing, repair, and inspection for homeowners across Seattle and the Puget Sound region.
Book a Free Inspection
A specialist will call you back to schedule.
- Free Inspection & Estimate
- Financing Available
- No High-Pressure Sales
- Photo-Documented Reports
- Locally Owned and Operated
- Santa Fe & Aprilaire Dehumidifiers
By the Numbers
Why sealing a crawl space pays off
~40% → <6%
85% decrease in untreated first floor air coming from the crawl space
Lifetime
Material guarantee on our 10-mil vapor barrier
~15%/yr
Heating & cooling costs saved once a crawl space is sealed
$5k–$10k
What a typical Crawlspace Medic job runs
Your crawl space isn't sealed off from the rest of your home. It's the air you breathe.
Warm air rising through the house pulls air up out of the crawl space with it. When that space stays damp, Seattle-area homeowners feel it upstairs: musty air, sticky rooms, and higher power bills.
Straight talk for Seattle homeowners
Your floors sit on top of whatever your crawl space is doing.
Most crawl space trouble announces itself upstairs before anyone looks below. Musty air that never quite clears, damp floors, a smell that returns no matter how often the house is cleaned. The cause usually sits under the floor: an open, vented crawl space collecting moisture from the ground and the outside air.
Crawlspace Medic of Seattle works on exactly that problem. Encapsulation seals the space with a heavy vapor barrier, closes it off from outside air, and puts a dehumidifier in charge of the moisture. It is the most complete fix we offer, and the free inspection tells you whether your house actually needs it.
“Encapsulation is like a roof. It protects your home. It lasts 15 to 25 years and saves you thousands in damage and energy loss.”
Five things, done well.
Our crawl space services in Seattle
Communities We Serve
Proudly serving Seattle and the surrounding area
- Seattle
- Bellevue
- Kirkland
- Redmond
- Sammamish
- Issaquah
- Renton
- Kent
- Auburn
- Federal Way
- Burien
- Everett
- Lynnwood
- Edmonds
- Bothell
- Marysville
- Tacoma
- Lakewood
- Puyallup
- Olympia
- & Surrounding Areas!
Find out what is under your Seattle-area home.
Reach Crawlspace Medic of Seattle
The inspection is free, the photos are yours, and the verdict is honest even when it is boring.
Crawlspace Medic of Seattle
20024 85th Ave S, Ste R03-A, Kent, WA 98031
Mon–Sat 8:00 AM – 6:30 PM · Sun: Closed
Service area: Seattle · Bellevue · Kirkland · Redmond · Sammamish · Issaquah · Renton · Kent · Auburn · Federal Way · Burien · Everett · Lynnwood · Edmonds · Bothell · Marysville · Tacoma · Lakewood · Puyallup · Olympia
How It Works
Simple, and on your terms.
Free inspection
We come out, crawl the space, and photograph what is actually down there. No charge, and no pressure to buy anything.
A report you keep
You get a photo-documented report and a straight diagnosis of your crawl space. You decide what happens next.
We fix the cause
We seal and dry the space and repair the damage, built around your home and your soil, not a one-size box.
Why sealed beats vented
The energy case for encapsulation, measured in real houses.
The strongest argument for sealing a crawl space came out of a Department of Energy field study that tracked 12 matched homes in the South. The homes with sealed crawl spaces spent more than 15% less on heating and cooling over the year, and their summer humidity stayed below 60%, the range where framing lumber stays dry and stable.
That is the whole logic of the service. A vented crawl space asks your HVAC system to fight the outdoors all season long. A sealed one gives it a smaller, drier job to do, and the savings show up on the same power bill you were already paying.
The Science, in One Picture
How moisture moves from the soil into your air
Effects of elevated moisture
- Mold growth
- Insect infestation
- Poor air quality
- Structural damage
Not sure what's going on under your house?
It costs you nothing to have an inspection. We show you exactly what we find, then you decide.
How we build it
Materials with warranties, prices without games.
We install vapor barriers in two weights, 10 mil and 20 mil, and the 10-mil Class 1 liner carries a lifetime warranty. Dehumidifiers come from Santa Fe and Aprilaire, including the Santa Fe Compact 70 with its 6-year manufacturer warranty. When budget is the constraint, we quote hybrid encapsulation honestly: the barrier runs 8 to 16 inches up the wall instead of the full height, protecting the ground plane for meaningfully less money.
On price, we would rather show you the whole board than a single number. Cut-rate crews will lay thin plastic for $1,000 to $2,000 and call it done. National foundation chains regularly quote $15,000 to $30,000. A typical Crawlspace Medic job lands between $5,000 and $10,000, and your inspection decides where in that range your house belongs.
Pricing, compared.
How our price stacks up against the rest.
Cut-rate crews
$1,000–$2,000
A loose sheet of plastic over the problem. Fails, then gets redone on top of the damage it let happen.
Crawlspace Medic
$5,000–$10,000
The honest middle: real materials, sealed and dried, done right the first time.
National foundation chains
$15,000–$30,000
The same scope, plus the markup for a full, white-labeled system.
That $5,000–$10,000 band is where most encapsulation jobs land, not a cap. Larger crawl spaces, structural repair, or a full restoration run higher: a complete restoration on a bigger home can reach $15,000 or more. Your exact price comes from the inspection, based on size, access, and what the crawl space actually needs.
The free inspection
We document first and recommend second.
Every engagement starts under the house with a camera and a moisture meter. You get photos of what we found, readings instead of adjectives, and a verdict we are willing to put in writing. If the space is dry and sound, we say so and leave you the photos. If it needs work, you will know exactly why before you ever see a price.
What We Measure
Where your framing falls on the moisture scale
12–16% is safe. Once framing crosses 20%, active decay becomes likely, and the report shows you exactly where yours reads.
A damp crawl space doesn't stay a crawl space problem. It becomes a whole-home one.
Cupping floors, that musty smell, and rising power bills usually trace back to the same place. The good news: it's fixable, and the sooner it's caught, the less there is to undo.
The jobs we hand to someone else
Crawl space framing is our lane, and we stay in it. Push piers, helical piers, and slab leveling are foundation-contractor work, and we do not sell them. When an inspection shows the foundation itself is moving, we say so plainly and point you to a structural specialist, because a well-sealed crawl space on a failing foundation helps no one. You will never find those services padded onto one of our estimates.
Common Questions
Seattle crawl space questions, answered.
Do you do foundation repair?
No. Crawlspace Medic handles crawl space encapsulation, repair, and diagnostic inspection. We do not install push piers or helical piers, and we do not do slab leveling. If your inspection reveals foundation movement beyond the crawl space framing, we refer you to a foundation specialist.
How much does crawl space encapsulation cost in Seattle?
It depends on the size of the space, how easy it is to access, and what the inspection finds. As a general guide, the cheapest crews lay loose plastic over a space for $1,000 to $2,000, national chains average $15,000 to $30,000, and a typical Crawlspace Medic job runs $5,000 to $10,000. The inspection and the quote are free, and we quote what your home needs, not a package.
Why does my house feel humid or smell musty?
Because of the stack effect, warm air rising through your home pulls air up out of the crawl space with it, and studies of vented crawl spaces have found that roughly 40% of your first-floor air starts below. When that space stays damp, you feel it upstairs as musty air, sticky rooms, and higher power bills. Sealing and drying the crawl space addresses the problem at its source.
What happens during the free inspection?
A technician goes under the house with a camera and a moisture meter, photographs what is there, and takes readings rather than guessing. We read wood moisture on a scale where 12 to 16% is safe and over 20% signals active damage. You get the photos, a plain explanation of what we found, and a written estimate only if something actually needs fixing. There is no fee and no obligation.
How long does the vapor barrier last?
The 10-mil, Class 1 vapor barrier we use is guaranteed for life against material breakdown. That is a different product from the thin 6-mil plastic that pest companies leave behind, and it is built to hold up for the long run.
Find out what your crawl space actually needs.
We inspect, photograph what we find, and give you a written report you keep, whether or not you choose us. If Seattle-area homeowners only need part of the work, we say so.