Fast, Reliable Duct Repair & Sealing Across Burien
Duct repair and sealing in Burien typically costs $280-$650 for most homes, with same-day service available when you call before noon. Our crew reaches Burien neighborhoods from our Seattle base in under 35 minutes, and we carry the parts to fix corroded metal ductwork, failing flex runs, and leaky joints on the first trip.
We’ve been driving to Burien since 2012, back when most of these post-war ranches and split-levels were still young. We know the streets around Three Tree Point, the hillside homes above Ambaum Boulevard, and the tight crawl spaces beneath the 1950s-era houses near 1st Ave S. That familiarity matters when you’re tracking down a duct leak in a dark, damp crawl space and need to get it sealed before another Puget Sound winter sets in. If your vents are blowing weak, your energy bills are climbing, or you’re smelling must from the registers, call (833) 700-5198. We’ll answer live, day or night.
Why Bellows Air Duct & Vent Co. of Seattle Is Burien’s Preferred Duct Repair & Sealing Company
Burien homeowners know our vans. We’ve repaired ductwork in the 98062 zip code and surrounding blocks for over four decades, and our reputation here was built one crawl space at a time. When we say we’ll be there when we say, we mean it. Our office staff answers calls around the clock, no voicemail, no app.
Our technicians are background-checked, uniformed, and trained specifically on the failure patterns we see in Burien’s coastal housing stock. They carry camera inspection gear from Rotobrush and sealing materials from Abatement Technologies, and they document every job with before-and-after footage you’ll see on screen before they pack up.
We’re not the cheapest outfit advertising a $99 whole-house special. We’re the company you call when that special turned into a $900 upsell and the leaks still aren’t fixed. Our upfront pricing means the number we give on the phone is the number on the invoice. No bait coupons, no scare tactics, no price changes at the door. And every repair is backed by our 90-Day Done Right Promise in writing. If it’s not right, we make it right. No paperwork, no arguing.
Our Duct Repair & Sealing Services in Burien
Metal Duct Repair
Burien’s coastal salt air is hard on galvanized steel. In homes near Puget Sound, especially around Three Tree Point and the shoreline roads off Ambaum, we’ve found metal duct joints corroding through in 15-20 years instead of the 30+ you’d expect inland. Fasteners rust, seams gap, and conditioned air leaks into crawl spaces where it does nobody any good. Our Duct Repair & Sealing crew replaces corroded sections with properly gauged metal, secures them with stainless steel fasteners where salt exposure is severe, and pressure-tests the repair before we leave.
Mastic Sealant Application
Duct tape fails. That’s not an opinion, it’s physics, especially in Burien’s damp marine climate where adhesive backings degrade and peels away. We seal metal duct seams and plenum connections with professional-grade mastic sealant, brushed on thick and allowed to cure to a flexible, permanent bond. In crawl spaces with moisture intrusion, mastic outlasts every tape product we’ve seen. We apply it to every seam we touch, not just the obvious leaks.
Air Leak Repair
A typical Burien home loses 20-30% of its heated and cooled air through duct leaks before it reaches the rooms. In older homes with original unsealed sheet metal, that number climbs higher. We pressurize the system, locate leaks with smoke pencil and thermal detection, then seal them methodically. In the North Burien neighborhood near 1st Ave S and S 154th St, we sealed a 1950s ranch home where salt-laden air had corroded the galvanized metal duct joints, causing leaks. Our crew replaced sections with stainless steel fasteners and applied mastic sealant, restoring system efficiency. The homeowner saw their utility bill drop the next month.
Flex Duct Repair
Flexible ductwork, common in Burien home additions and retrofits from the 1980s and 90s, collapses, tears, or disconnects at the collars. Rodents in crawl spaces compound the damage. We replace collapsed runs, repair torn insulation jackets, and secure connections with mechanical fasteners plus mastic, not just zip ties. If the flex is too degraded, we’ll tell you straight and quote replacement.
Duct Insulation
Uninsulated or poorly insulated ducts in Burien’s unconditioned crawl spaces bleed temperature. Cold supply lines sweat in summer, dripping onto subflooring. We wrap repaired and sealed ducts with foil-faced insulation rated for the application, sealed at every seam to prevent moisture infiltration. This matters in Burien’s climate more than drier eastern Washington cities where crawl spaces stay relatively stable.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Burien
We specify equipment and materials from manufacturers that HVAC professionals trust for durability in demanding conditions. Our trucks stock Rotobrush camera inspection systems, Abatement Technologies HEPA containment and sealing products, and Aprilaire air quality components. For Burien’s salt-air environment, we source stainless fasteners and coated hardware that outlast standard galvanized stock. Most repairs don’t require a return trip for parts. We complete them in a single visit, and you see the camera proof before we pack up.
Common Duct Repair & Sealing Problems We See in Burien Homes
- Corroded metal duct joints from salt air. In Burien, the coastal salt air accelerates corrosion of metal ductwork components, especially in homes near Puget Sound, causing joints and fasteners to fail years earlier than in inland cities like Kent. We regularly find pinhole leaks and separated seams in 20-year-old systems that should have lasted decades longer.
- Moisture intrusion and mold in crawl space ducts. Burien’s marine climate delivers persistent low-level humidity from Puget Sound combined with over 37 inches of annual rainfall, and the shallow crawl spaces common under area homes readily allow moisture to migrate into duct systems. This creates conditions favorable for mold colonization inside supply and return runs that can circulate spores throughout the living space for years undetected.
- Disintegrated flex duct from rodent damage and age. Flexible ductwork in Burien crawl spaces often sits directly on damp soil or hangs low enough for raccoons and rats to access. Torn jackets, collapsed inner cores, and disconnected collars are routine findings during our inspections.
- Aviation particulate accumulation in return plenums. Technicians working the north Burien neighborhoods closest to the SEA-TAC runways regularly find a fine dark particulate film coating the interior of return-air plenums. This is visually distinct from ordinary household dust, consistent with the ultrafine carbon particles associated with aircraft exhaust that area air-quality monitors have recorded at elevated levels compared to upwind King County neighborhoods. This contamination load accelerates filter loading and can degrade duct lining materials over time.
Pricing for Duct Repair & Sealing in Burien, WA
Most Burien homeowners pay between $280 and $650 for duct repair and sealing, depending on system accessibility, extent of corrosion damage, and whether sections need full replacement. Here’s how typical jobs break down:
| Service | Typical Range in Burien |
|---|---|
| Single leak seal (mastic, accessible) | $180-$280 |
| Metal duct section repair/replacement | $320-$520 |
| Flex duct run replacement (per run) | $240-$380 |
| Full system sealing with camera verification | $580-$920 |
| Crawl space duct insulation wrap | $180-$340 per run |
Several factors push costs toward the higher end in Burien: salt-corroded metal requiring stainless replacement hardware, restricted crawl spaces that slow work, and aviation particulate buildup requiring additional cleaning before sealing. We inspect with our camera first, show you exactly what we found, and give you the full price before we start. Estimates are free. We also honor our standing offers: $50 off any repair over $250, and a free second opinion on any written estimate you’ve already received. Seniors and veterans receive a permanent 5% discount.
Call (833) 700-5198 for your exact quote.
We Also Serve Cities Near Burien
Our service area extends to Normandy Park, SeaTac, Boulevard Park, and Riverton. If you’re in these communities, the same salt-air and aviation exposure patterns apply, and we carry the same materials to fix them. We route our Duct Repair & Sealing in Burien crews efficiently across south King County, so your wait time stays short whether you’re near Burien’s city center or across the line in SeaTac.
Serving Burien, WA - Our Local Coverage Area
We’re based in the Burien 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 - Duct Repair & Sealing in Burien
Salt-laden coastal air accelerates galvanic corrosion in galvanized steel ducts, causing joints and fasteners to fail 10-15 years sooner than in inland cities like Kent or Auburn. In Burien homes within a mile of Puget Sound, we regularly find rusted-through seams and separated plenum connections in systems only two decades old. We address this by using stainless steel fasteners in high-exposure areas and applying marine-grade mastic sealant that flexes without cracking as metal expands and contracts. Call (833) 700-5198 for a camera inspection if your home is near the shoreline.
Even homes built in the 1990s and 2000s in Burien can have original ductwork now reaching 25-30 years of service, and the salt-air exposure doesn’t discriminate by decade. We’ve found significant leaks in 15-year-old systems where builders used minimum-spec materials. Our camera inspection reveals the actual condition, not the install date. We offer free estimates, and our $89 Seasonal Tune-Up includes a basic duct assessment.
Mastic sealant outperforms every tape product in Burien’s damp crawl spaces, where adhesive degradation and moisture cycling destroy duct tape within months. We brush mastic onto every metal seam and collar connection, building a flexible, permanent seal that withstands humidity and temperature swings. For flex duct connections, we combine mechanical fasteners with mastic at the collar. This two-layer approach is standard on every job we do in Burien’s marine climate.
Flex duct’s plastic inner liner and foil jacket aren’t directly corroded by salt air, but the metal connection collars and support wires are. We repair or replace corroded collars, reattach separated flex runs with new mechanical fasteners and mastic, and replace sections where the inner core has collapsed or torn. If the flex is too degraded for reliable repair, we’ll quote replacement with no pressure. Call (833) 700-5198 and we’ll show you the camera footage so you can decide.
Given Burien’s combination of salt-air corrosion, high rainfall, and aviation particulate exposure, we recommend a professional duct inspection every 3-5 years for homes with metal ductwork, and every 5-7 years for newer flex systems. Homes within a half-mile of Puget Sound or under the Sea-Tac flight paths should lean toward the shorter interval. Our $89 Seasonal Tune-Up includes a visual duct assessment, or schedule a standalone camera inspection for a full interior view. Either way, you’ll know what’s actually in there, not guess.
Ready to stop losing heated and cooled air to your crawl space? Call (833) 700-5198 now for a free estimate on duct repair and sealing in Burien. We’ll answer live, schedule you promptly, and show up when we say we will. One honest price, camera-verified results, and our 90-Day Done Right Promise in writing. That’s how we’ve operated since 2012.
Written by Colin Merritt, Owner at Bellows Air Duct & Vent Co., serving Burien and south King County since 2012.