Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-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.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
See the difference
Before
After
Before
After
Before
AfterHow Much Does Duct Repair & Sealing Cost in Portland?
Duct repair and sealing in Portland typically costs $350 to $1,200 for most homes, with smaller single-run patches and accessible joint sealing landing near the bottom of that range and full-system sealing with multiple disconnected runs pushing toward the top. A single small hole or separated joint usually runs $150 to $400. Whole-home aerosol or mastic sealing generally runs $800 to $2,500 depending on the size and layout of the system. The written estimate sets the final price, and we provide that estimate free.
Those numbers matter more in Portland than in most markets, because the housing stock here is old and varied. A 1920s bungalow in Sellwood with a retrofitted system in the attic presents a very different job than a 1990s build in Bethany with rigid trunk lines in a conditioned crawlspace. The price follows the ductwork, not a flat rate card.
Key Takeaways
- Most Portland duct repair and sealing jobs fall between $350 and $1,200.
- Small patches and single-joint seals: $150 to $400.
- Full-system sealing: $800 to $2,500.
- Disconnected or crushed flex runs often add $200 to $600 per run to replace.
- Estimates are free, and the price is set per job by the written estimate.
Duct Repair & Sealing Cost Breakdown (2026)
Below are typical Portland-area ranges for the work we quote most often. These are estimates for planning, not a price list. Your written estimate is the number that counts.
| Service | Typical Cost Range | What It Covers |
|---|---|---|
| Single patch or joint seal | $150 – $400 | One accessible hole, tear, or separated joint sealed with mastic and mesh |
| Section replacement (per run) | $200 – $600 | Removing a crushed or disconnected flex run and installing new duct |
| Partial system sealing | $400 – $900 | Sealing accessible joints, boots, and plenum connections in part of the system |
| Whole-home aerosol sealing | $800 – $2,500 | Sealing the entire duct system from inside, including runs you can’t reach |
| Register and boot sealing (per register) | $25 – $75 | Sealing the gap between the duct boot and the floor or wall opening |
| Return duct repair | $250 – $700 | Repairing or resealing return runs, which are often larger and less accessible |
| Full duct cleaning before sealing | $400 – $900 | Cleaning the system so sealant and repairs bond to clean surfaces |
What pushes a Portland job toward the high end: attic systems in older homes where the ducts run through tight, low-clearance spaces; crawlspace runs where the duct has sagged or pulled apart at the collar; and any home where the system was retrofitted after the fact rather than designed with the house. What keeps it low: accessible rigid metal trunk lines, a system installed in the last couple of decades, and damage confined to one or two spots. A home with a straightforward layout and one clear problem is usually a short job. A home where the ducts have been quietly leaking for years across a dozen joints is a full-system sealing job.
One thing we hear often in Portland: a homeowner is quoted for sealing before anyone has looked inside the ducts. Sealing over a dirty system doesn’t hold. That’s why our work starts with a look at the condition of the ducts, using Steadfast Air Duct Cleaning‘s Rotobrush and Nikro equipment to see and clean the interior before we seal anything. Sealant bonds to clean metal and fails on grime.
What Affects Duct Repair & Sealing Pricing in Portland
Six factors move the price more than anything else on a Portland job:
- Attic versus crawlspace access. Portland has a lot of homes with ducts in unconditioned attics, where summer heat and winter condensation both take a toll on flex duct and joints. Attic work in a low-pitch roof is slower and often needs two people, which raises labor.
- Age and material of the ductwork. Older Portland homes often have a mix of materials: original galvanized trunk lines with later flex additions branching off. Mixed systems have more connection points, and every connection is a place that can leak.
- How many runs are damaged. One crushed run is a patch. Four crushed runs in a 1950s ranch is a replacement job, and each run adds $200 to $600.
- Whether cleaning is needed first. Sealing and repair require a clean surface. If the system hasn’t been cleaned, that cost ($400 to $900 for most homes) is part of the job, not an add-on we invent later.
- Duct location and clearance. Ducts buried under insulation, boxed into soffits, or routed through finished basement ceilings take longer to reach, and time is the largest line item on any repair.
- System size. A small condominium system in the Pearl District has far fewer runs than a four-bedroom house in Laurelhurst. More runs means more joints, more sealing, and a higher total.
The Portland climate adds a specific wrinkle. Our wet winters mean crawlspaces stay damp for months, and flex duct that sits in that moisture can sag, separate at the collar, and grow the kind of buildup that restricts airflow. Sealing a system in a damp crawlspace without addressing the sag or the connection is a repair that won’t last the season. If you want the broader picture of how we approach the work, the Portland page covers our services across the city.
How to Save on Duct Repair & Sealing
The biggest savings come from catching problems early. A joint that’s starting to separate is a $150 seal. The same joint after a season of pulling apart, filling the crawlspace with heated air, and driving up your heating bill is a section replacement.
- Fix small leaks before they spread. If you notice a whistling register, a room that never warms up, or dust settling on surfaces right after cleaning, get it looked at. Small repairs are cheap. System-wide damage is not.
- Bundle cleaning with sealing. If your ducts need cleaning anyway, having the cleaning and the repair done as one job saves the cost of a second visit and lets the technician seal what they find while the system is open.
- Seal registers and boots yourself where it’s safe. The gap between a floor register and the duct boot is a common leak, and sealing it with mastic or foil tape is a straightforward homeowner task. Leave anything inside the duct system to a technician.
- Ask for a written scope before work starts. A clear estimate that lists each run and each repair keeps the job from expanding mid-visit. We write ours that way.
- Get the free estimate. Call (877) 957-0767 and we’ll look at the system and give you a written number before any work begins. There’s no charge for the estimate.
One more note on where not to save: don’t let anyone seal a system without cleaning it first, and don’t accept a quote that doesn’t distinguish between patching and full-system sealing. The two are different jobs with different price ranges, and a quote that blurs them is a quote you’ll be renegotiating later.
Do I Need Duct Cleaning Before Sealing?
Yes. Sealing and repair require clean duct surfaces, or the sealant won’t bond and the repair won’t hold. Cleaning a typical Portland home’s duct system runs $400 to $900, and it’s usually done as part of the same visit as the repair. Our technicians use Rotobrush and Nikro systems, plus Abatement Technologies air filtration to capture what’s dislodged during the clean, so the contaminants come out of the system instead of settling back into your living space. Once the ducts are clean, we can see the actual damage and repair it properly.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in Portland?
Whole-home duct sealing in Portland typically runs $800 to $2,500, with most homes landing around $1,200 to $1,800. Partial sealing of accessible joints and boots runs $400 to $900. Call (877) 957-0767 for an exact quote – estimates are free. The written estimate sets the final price.
Is it cheaper to repair or replace ductwork?
Repair is almost always cheaper than replacement, and for most Portland homes it’s the right call: a $150 to $400 patch versus several thousand for a full replacement. Replacing the entire system only makes sense when the ductwork is crushed beyond repair across many runs or the layout itself is the problem. A technician can tell you which situation you’re in after looking at the system.
How much does it cost to fix a disconnected duct?
Reconnecting a single disconnected duct run typically costs $200 to $600 in Portland, depending on access and whether the run needs new duct or just a reconnection. If several runs have separated, expect to move toward the higher end of the range. Call (877) 957-0767 and we’ll give you a written estimate before any work starts.
Can you repair ducts the same day?
Yes, same-day repair is often possible for straightforward jobs. Call (877) 957-0767. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday. A call outside dispatch hours is booked into the next opening. Larger jobs that need cleaning first or multiple section replacements may be scheduled for a follow-up visit.
Does duct sealing really save money on heating in Portland?
Sealing leaky ducts reduces the heated air that escapes before it reaches your rooms, which lowers the work your furnace has to do. In a Portland home with a system in a cold attic or damp crawlspace, that lost air is significant. We don’t quote savings percentages, because they depend on your system and your home; we quote the repair, and you see the result on your bill.
If your ducts are leaking, torn, or disconnected, the cost of waiting is higher than the cost of the repair. Steadfast Air Duct Cleaning handles duct repair and sealing as a standalone service, with professional-grade Rotobrush and Nikro equipment and Abatement Technologies filtration on every job. Our technicians have up to 8 years of experience, and we work with Honeywell, Aprilaire, and Guardsman air quality systems when the duct work sits alongside whole-home air equipment. We don’t just clean ducts; we fix them when they’re damaged. Call (877) 957-0767 for a free estimate. We answer 24/7, with fast dispatch from 7am to 7pm, Sunday through Friday.
Pricing reflects the Portland market as of 2026. Steadfast Air Duct Cleaning offers free estimates – call (877) 957-0767.
Written by the team at Steadfast Air Duct Cleaning.
What Our Customers Say
"Did the dryer vent while they were here for a small add on price. The dryer now finishes a load in one cycle instead of two."
- Holly Delaney"My wife's allergies had been bad in this house since we moved in. It's been two months since they did the ducts and it's noticeably better. Not a miracle, but real."
- Jason Miller"Found a disconnected run in the crawlspace while they were in there and told me about it rather than cleaning around it."
- Beatriz Mendoza