Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Before
After
Before
After
Before
AfterFast, Reliable Air Duct Repair Across Seattle
Air duct repair in Seattle usually runs between $280 and $900 depending on how much of the system has failed, and most jobs in neighborhoods like Wallingford, West Seattle, and Rainier Valley are completed in a single visit. We’re Linden Air Duct Cleaning, and we’ve spent years working inside Seattle’s crawl spaces so you don’t have to. If your ducts are leaking air, pulling crawl space dampness into your living room, or spreading a musty smell through the house, call us at (980) 447-2498 and we’ll give you a written price before any work begins.
Seattle’s housing stock presents a repair challenge most national duct companies don’t understand. Our Air Duct Repair team knows the difference between a Ballard Craftsman’s 1970s retrofit and a newer Medina build, because we’ve been inside both. Marcus Veale built our approach around one principle: tell the homeowner exactly what we found, exactly what it costs, and exactly what happens if it fails. That’s why every repair carries a 365-Day Done Right Promise in writing.
Key Takeaways
- Seattle duct repairs typically cost $280 to $900, with a written price agreed before work starts.
- Damp crawl spaces and 1970s-era retrofits cause most duct failures in Seattle homes, not simple dust buildup.
- Every repair includes a written guarantee and a free second visit if the repair fails within 365 days.
- Your technician’s name and photo are sent to you before arrival, and they show a photo ID badge at the door.
Why Linden Air Duct Cleaning Is Seattle’s Preferred Air Duct Repair Company
Seattle homeowners call us because we treat the real problem, not the symptom. In this city, a duct repair is only as good as your understanding of the crawl space underneath it. Our techs have run hundreds of camera inspections through duct runs in Fremont, Beacon Hill, and Columbia City, and we’ve learned that what looks like a simple leak is often a moisture pathway from a vented crawl space into the living area.
Phones are answered by a live person 24 hours a day, seven days a week. Not a recording, not a callback queue. When you call (980) 447-2498, a human picks up. Before any tech steps onto your property, you get their name and photo. When they arrive, they’re in a clean, marked uniform and they show a photo ID badge at the door. That’s the Threshold Standard, and it’s been our operating rule since 2004 as part of the Threshold Group family.
We’re not a national chain pretending to be local. We’re an independently owned and operated Seattle location with roots in this city’s ductwork. That means we understand what a 1920s home in Wallingford needs very differently from what a 1980s rambler in West Seattle needs. Every repair we quote reflects the actual conditions of your home, not a cookie-cutter price sheet.
Ductwork Repair in Seattle
Ductwork Repair in Seattle almost always starts in the crawl space, because that’s where the city’s housing stock puts the weak points. A typical repair here addresses unsealed joints, disconnected flex runs, crushed sheet metal, or rusted trunk lines that are pulling damp, mold-laden crawl space air into the home. We remove the damaged section or reseal the failed connection, then verify the repair with a pressure check. Costs in Seattle run from roughly $280 for a simple reseal to $650 or more for replacing a section of rusted trunk line.
Sealing Connections and Eliminating Crawl Space Draw
The most common repair we perform in Seattle is resealing duct connections that were never properly joined. Many of these connections date from retrofits done decades ago, when homes built without central heat had forced-air systems bolted on. Each gap lets crawl space air enter the system, and in Seattle that air carries moisture and biologicals. We seal the connections, then verify the static pressure so the system isn’t pulling from the crawl space.
Repairing Rusted and Crushed Sections
Seattle’s damp crawl spaces rust out sheet metal trunks faster than drier regions. We replace rusted sections with sealed, insulated ducting rated for crawl space conditions. If a flex run has been crushed by stored items or shifted piers, we cut out the damaged section and splice in a proper replacement, then verify airflow at the register.
Duct Replacement in Seattle
Duct Replacement in Seattle is the right call when the existing ductwork has reached the end of its service life, which happens sooner here than in drier cities. Rusted sheet metal, flex duct with standing condensation, or systems so poorly designed that repair would cost more than replacement are the cases we see most often. A partial replacement of a failed supply run in Seattle typically costs $500 to $900. Full-system replacement runs from $2,500 to $6,000 depending on home size and the number of runs, though for this scope you’ll get a written quote before anything starts.
Replacing Flex Runs in Older Seattle Homes
Many Seattle homes have original flex duct from the 1970s or 1980s, and that material degrades in damp crawl spaces. We replace failing flex with R-8 insulated flex rated for crawl space conditions, sized correctly for the airflow your system was designed to deliver. The difference in indoor air quality after replacing a moldy flex run is immediate.
Full Trunk Line Replacement
When the main trunk line has rusted or separated along its length, patching becomes a losing game. We measure the full run, cut out the old trunk, and install new sealed and insulated ductwork with proper hangers and pitch. We then verify the whole system with a pressure test and airflow readings at each register. This is the job that stops recurring musty smells for good.
Trusted Brands We Service in Seattle
Our equipment is professional grade, from trade-trusted manufacturers including Rotobrush, Nikro, Honeywell, and Aprilaire. That matters for Seattle homes because these systems handle the agitation, negative pressure, and HEPA filtration needed for source removal in damp duct runs. We keep parts on hand for common repair scenarios across Seattle, and because our scheduling is coordinated locally from our Seattle office, we can turn most parts availability around quickly for homeowners in any part of the city. If your existing air quality equipment includes Abatement Technologies or Guardsman components, we service those as well.
Common Air Duct Repair Problems We See in Seattle Homes
- Unsealed retrofit connections in pre-1940s homes: Craftsman bungalows in Wallingford and Columbia City were built before central heat existed. When forced air was added in the 1970s, the joints connecting new ducts to old plenums were often never sealed, and they’ve been pulling crawl space air ever since.
- Condensation-soaked flex duct in vented crawl spaces: Homes in West Seattle and the Rainier Valley commonly have original flex runs through damp, vented crawl spaces. Without encapsulation or at least a vapor barrier, that duct sweats, grows biological material, and eventually fails structurally.
- Wildfire smoke particulate loading: When wildfire smoke from Eastern Washington settles over Seattle, homeowners seal up and run fans continuously. That fine particulate loads the duct interiors, then sits there through the wet winter months, feeding the moisture problem.
- Rusted sheet metal trunk lines: Constant low-level humidity in Seattle’s vented crawl spaces accelerates rust on uninsulated metal trunks. We regularly replace sections that have rusted through, especially in mid-century homes near Puget Sound or Lake Washington.
Pricing for Air Duct Repair in Seattle, WA
A typical Air Duct Repair in Seattle runs $280 to $900 for most single-visit jobs, with the final number depending on how much of the duct run has failed. Resealing a few unsealed connections sits at the low end. Replacing a rusted trunk section or a failed flex run lands in the $500 to $700 range. A partial system replacement can push toward $900. You’ll have your exact price in writing before any work starts, and the number on that sheet is the number you pay. No per-vent add-ons, no surprise invoice. Call (980) 447-2498 for a free estimate.
We Also Serve Cities Near Seattle
While this page focuses on Seattle, our crews also serve Medina, Bellevue, Mercer Island, and Kirkland. Homes in those cities have their own duct repair patterns, but the same Threshold Standard applies: background-checked techs, a written price before work, and a 365-Day Done Right Promise on every job. If you’re in one of these nearby communities, call (980) 447-2498 and we’ll get a tech scheduled.
Serving Seattle, WA - Our Local Coverage Area
We’re based in the Seattle area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Air Duct Repair in Seattle
Seattle’s marine climate keeps humidity high year-round, and most of the city’s pre-1990 housing stock routes ductwork through vented, unencapsulated crawl spaces. That combination means condensation inside ducts is normal here, and condensation feeds biological growth. A dryer climate would dry out the same duct between rain events. In Seattle, the damp never leaves.
It’s usually both, because the two are connected. In a 1926 Craftsman on NW 45th, a homeowner’s musty living room complaint traced back to a 1970s forced-air retrofit whose flex supply run had been bolted to a crawl-space plenum with unsealed connections. Our tech ran a camera inspection and found condensation streaks and microbial colonization along the trunk line. We used agitation tools and source removal under negative pressure with HEPA filtration to clean the system, then sealed the improvised joints so crawl-space air stopped being pulled into the living space. The odor cleared within a day. Most musty smells in Seattle homes follow this same pattern: crawl space moisture finds its way in through a duct connection.
No. A fogging treatment can’t remove the microbial growth that’s colonizing the interior of flex duct or sheet metal runs. Without source removal under negative pressure, the growth stays put and recolonizes the damp duct interior within weeks. A real repair removes the source, then seals the duct so moisture stops being drawn in. Fogging doesn’t do either. Pay for the repair that solves the problem, not the upsell that masks it for a month.
When wildfire smoke from Eastern Washington and the Cascade Range settles over Seattle, homeowners seal up and run their HVAC fans continuously to filter the air. That circulation pulls fine particulate into the duct interiors, where it accumulates. Then Seattle’s wet winter arrives and the ducts stay damp for months. The combination of smoke particulate and moisture is a perfect environment for biological growth. We see this pattern every year in homes across Seattle, and skipping HEPA filtration and agitation during a cleaning leaves that load in place.
Yes, we service and work with equipment from all of these manufacturers. Rotobrush and Nikro are the core of our source-removal setup, and we work with air-quality products from Honeywell, Aprilaire, Abatement Technologies, and Guardsman. If you have any of this equipment installed and it’s not performing, call (980) 447-2498 and we’ll diagnose it as part of your repair visit.
Call Linden Air Duct Cleaning for Air Duct Repair in Seattle
If your Seattle home has musty air, weak airflow, or ducts you suspect are leaking, call us at (980) 447-2498. We’ll schedule a visit, send you your technician’s name and photo before they arrive, and give you a written price before any work starts. Every repair is covered by our 365-Day Done Right Promise, and if a covered repair fails, we come back at no charge. That’s how Marcus Veale has run Linden Air Duct Cleaning since day one. Call now and get an honest answer about your ducts.
Written by Marcus Veale, Owner at Linden Air Duct Cleaning, serving Seattle, WA.