Fast, Reliable Duct Repair & Sealing Across Tigard
Duct repair and sealing in Tigard typically costs $280–$750 depending on whether you’re addressing localized leaks or full flex duct replacement, and most jobs are completed in a single visit. If your 1970s–1990s ranch or split-level is losing conditioned air into a damp crawl space, you’re not imagining the drafty rooms or rising energy bills. Call (877) 335-1974 for a free estimate — we’ll inspect your system and show you exactly where the air is escaping.
We’ve worked in Tigard homes long enough to know the pattern: flex duct routed through unconditioned crawl spaces in the Tualatin River Basin, absorbing decades of ground moisture until the fiberglass liner separates, collapses, or starts shedding particulates into your air. Our Duct Repair & Sealing team handles everything from spot mastic sealing to full flex duct re-sleeving, and we carry the professional-grade equipment to do it without cutting corners.
Why Landmark Air Duct Cleaning Service Washington Is Tigard’s Preferred Duct Repair & Sealing Company
Richard Anderson, our Owner and Lead Technician, personally oversees every duct repair job — a level of owner accountability that multi-trade HVAC operations structurally can’t match. After 11 years as a dedicated indoor air quality specialist, not a generalist, we’ve developed specific expertise for Tigard’s housing stock: the tract ranches and split-levels built during the Pacific Northwest forced-air boom, now 30–50 years old with ductwork showing its age.
Our 732 verified reviews averaging 4.9 stars include steady feedback from Tigard homeowners in the 97223 ZIP and neighborhoods bordering Fanno Creek. They mention the same things: Richard showed up when he said he would, explained what he found in the crawl space, and fixed it without upselling. That’s the difference between a specialist who lives in the ductwork and a company that rotates through crews.
We route to Tigard from our Seattle base with scheduling built around your availability, not ours. Most repair calls book within 48 hours, and because we travel with Rotobrush and Nikro systems plus mastic, insulation, and replacement flex duct on the truck, we rarely need a return trip.
Our Duct Repair & Sealing Services in Tigard
Flex Duct Repair
This is our most frequent call in Tigard, and there’s a reason. The bulk of local housing — ranches and split-levels from the 1970s through the 1990s — was built with fiberglass-lined flex duct routed through crawl spaces on pier-and-beam or perimeter foundations. In the Tualatin River Basin’s persistent humidity, that liner degrades faster than in hillier suburbs like Lake Oswego. We recently repaired a collapsed flex duct in a split-level on Shattuck Road near Fanno Creek. The 30-year-old fiberglass liner had separated at the joint, blowing conditioned air into the crawl space. We re-sleeved the run with Rotobrush agitation, sealed all connections with mastic, and reinstalled insulation to prevent future vapor intrusion. Typical flex duct repair in Tigard runs $340–$620 for a single run, or $580–$950 for multiple collapsed sections.
Duct Sealing
Even intact ductwork leaks. Joints separate from vibration and thermal cycling. Seams open. In Tigard’s older homes, we regularly find 15–25% air loss at connections before we touch a tool. Our sealing process starts with pressure testing to map the leaks, then targeted mastic application at every joint, transition, and penetration. For homes near Fanno Creek where crawl space moisture has accelerated corrosion at metal connections, we often combine sealing with spot repair. Duct sealing for a typical Tigard ranch runs $280–$480; split-levels with more complex branch runs range $420–$680.
Metal Duct Repair
Some Tigard homes — particularly those with later additions or partial HVAC upgrades — have galvanized steel trunk lines with flex duct branches. The steel holds up better structurally, but corrosion at seams and rust-through at low points are common where decades of crawl space condensation have pooled. We patch localized corrosion, replace rusted sections with matching gauge metal, and transition properly to existing flex runs. Metal duct repair in Tigard typically runs $380–$720 depending on accessibility and extent of replacement.
Duct Insulation & Mastic Sealant
Repair without re-insulation is half a job in Tigard. We use mastic sealant — a fiber-reinforced, water-based compound that remains flexible after curing — because tape fails. Duct tape dries, cracks, and peels in damp crawl spaces; mastic bonds to metal and flex duct, seals gaps up to 1/8 inch, and lasts. After sealing, we reinstall or replace insulation at R-6 minimum to prevent condensation on cold duct surfaces. Mastic sealing with insulation replacement runs $320–$560 for most Tigard homes.
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 Tigard
We repair and seal duct systems connected to equipment from Honeywell, Aprilaire, and other major manufacturers, and we stock compatible fittings, connectors, and air quality components for Tigard customers. Our trucks carry Abatement Technologies HEPA filtration accessories and Guardsman antimicrobial treatments for properties where mold colonization has compromised indoor air quality. Because we travel prepared, most Tigard repairs don’t wait on parts — Richard diagnoses, sources from stock, and completes the seal in one visit.
Common Duct Repair & Sealing Problems We See in Tigard Homes
- Collapsed flex duct liner from decades of moisture absorption. In homes near the Fanno Creek corridor and other low-lying 97223 neighborhoods, we routinely pull access panels to find flex sections that have absorbed years of ground vapor and lost structural integrity — a failure mode far less common in hillside housing just east in Lake Oswego.
- Mold colonization inside fiberglass duct liners. Tigard’s marine climate delivers persistent rain and elevated humidity from October through May, and the Tualatin River Basin’s flat topography keeps ground-level moisture high even in summer. Crawl-space ductwork is exposed to this vapor year-round, accelerating mold growth that inland Oregon markets don’t experience at the same intensity.
- Separation at duct joints from age and vibration. Thirty to fifty years of furnace cycling, thermal expansion, and minor seismic settling loosens connections in Tigard’s mid-generation housing stock. Conditioned air escapes into unconditioned spaces, and return ducts pull musty crawl space air back into your living areas.
- Insulation degradation and condensation drip. Original R-4 or R-6 insulation compresses, tears, or falls away over decades, exposing metal duct to humid crawl space air. Cold supply ducts sweat, rust, and drip — we’ve found water stains on vapor barriers directly below compromised runs in Tigard crawl spaces.
Pricing for Duct Repair & Sealing in Tigard, OR
| Service | Typical Range in Tigard | What Affects Cost |
|---|---|---|
| Spot mastic sealing (single leak) | $180–$280 | Accessibility, extent of corrosion |
| Duct sealing (full system test & seal) | $280–$680 | Home size, number of branches, crawl space conditions |
| Flex duct repair (single run) | $340–$620 | Length, liner condition, insulation replacement needed |
| Flex duct repair (multiple runs) | $580–$950 | Extent of collapse, mold remediation required |
| Metal duct patch/replacement | $380–$720 | Gauge matching, transition fabrication |
| Insulation replacement with sealing | $320–$560 | R-value, linear footage, vapor barrier condition |
These ranges reflect Tigard’s market specifically — labor costs, crawl space access difficulty, and the prevalence of aging flex duct that demands more intervention than newer rigid systems. Every estimate starts with a hands-on inspection; we don’t quote over the phone without seeing your ductwork. Call (877) 335-1974 to schedule — estimates are free, and Richard will show you exactly what he’s found before any work begins.
We Also Serve Cities Near Tigard
Our repair and sealing crews regularly work in Garden Home-Whitford, Beaverton, Cedar Hills, and Raleigh Hills — the same 97223-adjacent communities with similar mid-generation housing stock and crawl space conditions. If you’re in a bordering neighborhood and unsure whether we cover your address, call (877) 335-1974 and we’ll confirm routing.
Serving Tigard, OR — Our Local Coverage Area
We’re based in the Tigard 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 Tigard
Tigard’s flat, creek-adjacent terrain in the Tualatin River Basin traps ground moisture in crawl spaces, while Lake Oswego’s hillside housing drains better and often features newer or upgraded duct systems. The 1970s–1990s ranch and split-level homes that dominate Tigard were built with fiberglass-lined flex duct that has now absorbed decades of humidity, leading to collapsed liners and separated joints we rarely see at the same rate in hillier, drier suburbs. Call (877) 335-1974 for an inspection if your home fits this profile — estimates are free.
Mastic remains permanently flexible after curing, bonds to damp metal and flex duct, and seals gaps up to 1/8 inch without peeling — critical in Tigard’s humid crawl spaces where duct tape dries out and fails within months. We apply it with a brush at every joint, transition, and penetration, then mesh-reinforce stress points. Tape is a temporary patch; mastic is a permanent seal. For a system that won’t leak next rainy season, call (877) 335-1974.
1970s–1990s Tigard ranches typically use fiberglass-lined flex duct on pier-and-beam foundations, routed through unconditioned crawl spaces with minimal vapor barrier protection, while newer builds use rigid metal or insulated flex with sealed crawl spaces or conditioned basements. The older systems were never designed for 50 years of Pacific Northwest moisture exposure, which is why we’re now seeing widespread liner degradation in precisely this housing cohort. Richard can assess whether your ranch needs targeted repair or full re-sleeving — call (877) 335-1974 for a free evaluation.
Yes — sealing prevents your HVAC from pulling musty, mold-laden crawl space air through return leaks and stops conditioned air from escaping into unconditioned spaces where it does nothing for your home. In Tigard split-levels with ductwork spanning multiple floors and crawl space zones, we’ve measured significant reduction in airborne particulates after proper mastic sealing and insulation replacement. The improvement is especially noticeable in homes near Fanno Creek where ground moisture is highest. Call (877) 335-1974 to schedule pressure testing and see where your system is leaking.
Most single-run flex duct repairs take 2–3 hours; multiple collapsed sections or full system re-sleeving in a split-level can extend to a full day. Tigard’s tight crawl spaces — common in 1970s–1990s construction with minimal access hatches — add time for technician maneuvering and material handling. We bring everything needed on the truck, so we’re not leaving to source parts. For scheduling that respects your time, call (877) 335-1974 — we’ll give you a realistic window when you book.
Ready to stop losing conditioned air into your crawl space? Call (877) 335-1974 or request a free estimate online. Richard Anderson, Owner and Lead Technician at Landmark Air Duct Cleaning, will inspect your Tigard home’s ductwork, show you exactly where it’s failing, and seal it properly — with mastic, not shortcuts, and with the accountability that comes from owner-led work on every job.
Written by Richard Anderson, Owner and Lead Technician at Landmark Air Duct Cleaning Service Washington, serving Tigard and the greater Portland metro area since 2013.