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
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After
Before
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Before
AfterHow Much Does Duct Repair & Sealing Cost in St. George?
Duct repair and sealing in St. George typically runs $350 to $2,400, depending on how much of the system is damaged and how accessible the ductwork is. A single disconnected joint or a small run of failed mastic usually lands at the low end, while a whole-house reseal with several crushed flex runs lands closer to the top. We give you a written estimate before any work starts, and that number is the price.
Most homes here have a mix of flex duct in the attic and rigid trunk lines in the crawlspace or garage. That mix is why a St. George estimate can swing so widely from one house to the next on the same street. Below we break down what each part of the job costs in this market for 2026, what pushes it up or down, and how to keep the bill reasonable without skipping the repair that actually matters.
Key takeaways
- Simple joint repairs and small seals: $350 to $650
- Room-by-room duct sealing with a blower door test: $900 to $1,800
- Replacing crushed or collapsed flex runs: $450 to $1,200 per run
- Full system repair after pest or water damage: $1,500 to $2,400
- Free estimates and a written, per-job price. Call (855) 419-9402. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Duct Repair & Sealing Cost Breakdown (2026)
These are typical ranges for the St. George market. Every job gets its own estimate, but this is where the numbers usually fall.
| Work performed | Typical price range | What it covers |
|---|---|---|
| Single joint or boot seal | $350 – $650 | Re-sealing one or two disconnected or leaky connections with mastic or foil tape |
| Partial duct sealing (visible runs) | $600 – $1,100 | Sealing accessible seams, joints and boots across part of the system |
| Whole-home duct sealing | $900 – $1,800 | Full accessible system sealed, with a before-and-after blower door test |
| Reconnect a detached run | $400 – $850 | Reattaching and securing a run that has come off its collar or trunk |
| Replace one crushed flex run | $450 – $1,200 | New flex duct sized correctly, run and sealed |
| Replace rigid trunk section | $700 – $1,600 | Damaged sheet metal trunk section rebuilt and sealed |
| Full repair after pest or water damage | $1,500 – $2,400 | Damaged sections removed and replaced, system cleaned, then sealed |
| Register and grille sealing | $250 – $600 | Sealing gaps around supply and return registers |
What drives the number up most is access. Ductwork wedged into a tight attic space in the older sections of St. George takes longer to reach and seal than ductwork in a garage closet or an open crawlspace. What keeps it down is scope. If one joint has failed and the rest of the system is sound, you’re looking at the low end, and there’s no reason to sell you more than that.
We treat duct repair as a core service rather than an add-on to cleaning. Leaks and disconnections don’t fix themselves, and no amount of cleaning will close a gap that’s bleeding conditioned air into your attic. That’s why our estimates separate repair from cleaning, so you can see exactly what each one costs.
What Affects Duct Repair & Sealing Pricing in St. George
Two houses of the same square footage here can come back with very different numbers. These are the factors that move the estimate.
- How accessible the ductwork is. Attic runs in St. George get hot, and working up there takes time. Ductwork in a garage closet, an open crawlspace or a mechanical room comes apart and back together faster, which shows up in the price.
- How much of the system is leaking. A single disconnected boot is a quick fix. A dozen failed seams across the trunk and all the branches is a full sealing job, and the labor scales with the count.
- Flex duct versus rigid metal. Flex is cheaper to replace per run but more prone to crushing and sagging. Rigid sheet metal lasts longer but costs more per section when it has to be rebuilt.
- The reason it failed. Rodent intrusion, water intrusion, and simple age produce different repairs. Pest or water damage usually means replacing damaged sections plus a full clean before sealing, which moves the job into a higher bracket.
- Duct sizing and layout mistakes from a prior install. Undersized or badly routed runs cause pressure problems that no amount of sealing fixes. Correcting a layout adds labor but often solves comfort complaints that sealing alone can’t touch.
- Filtration and IAQ upgrades in the same visit. If you’re adding a better filter cabinet or working with a Honeywell or Aprilaire setup, doing it while the system is opened up saves a second trip and a second estimate.
If you’re weighing repair against cleaning, it helps to see the full picture of what a professional visit involves on our Ironwood Air Duct Cleaning page, and our St. George page covers local service details. Local climate shapes the work more than most homeowners expect. Dry summer heat and intense afternoon sun make attic ductwork expand and contract, and that cycle loosens tape and mastic over time. Winters bring cold nights and reverse the process. Ductwork that’s been sealed with cheap tape tends to open up again within a season or two. Proper mastic and foil-backed systems hold.
How to Save on Duct Repair & Sealing
The cheapest duct repair is the one done once, correctly. These steps keep the total down without cutting corners.
- Get the estimate in writing before work starts. A written, per-job estimate protects you from scope creep. Our estimates are free.
- Fix leaks before you replace. If a run is leaking at the joints but the duct itself is sound, sealing is far cheaper than replacement. Ask for the seal-first number and compare it to replacement.
- Bundle repair with cleaning when both are needed. Once ductwork is opened for repair, cleaning the system while it’s accessible means one setup instead of two. It costs less than two separate visits and it’s better for indoor air quality, since you’re not sealing dust and debris into the system.
- Ask for a blower door test before and after. It proves the sealing worked and shows exactly how much leakage dropped. Without it you’re guessing.
- Address the cause, not just the symptom. If rodents opened a run, sealing it without securing the entry point means doing the job twice. A proper repair covers the cause.
We use Rotobrush contact-cleaning systems and Nikro HEPA vacuums, and work with Abatement Technologies equipment for jobs that need containment-level care. That matters most when repair follows pest or water damage, because contaminated ductwork has to be handled correctly before it’s sealed back up. Our technicians have up to 10 years of experience, and we know the difference between a repair that holds and one that fails by next summer.
Protective products from the Guardsman line finish the job, so what we’ve sealed stays sealed. To get a free, written estimate, call (855) 419-9402. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
FAQs – Duct Repair & Sealing Cost
How much does duct repair cost in St. George?
Typical duct repair in St. George runs $350 to $2,400, with most single repairs landing between $400 and $900. The biggest variables are how many joints have failed and how accessible the ductwork is. Call (855) 419-9402 for an exact quote. Estimates are free.
Is it cheaper to repair ductwork or replace the whole system?
Repair is usually far cheaper. Sealing and repairing an existing system typically costs $900 to $1,800, while full duct replacement starts well above that. Replacement only makes sense when the ductwork is sized wrong throughout, severely damaged, or inaccessible for repair. We’ll tell you honestly which one you’re looking at. Call (855) 419-9402 to talk it through.
How much does duct sealing cost in St. George?
Whole-home duct sealing typically comes in at $900 to $1,800, including a before-and-after blower door test. Sealing a handful of accessible runs runs $600 to $1,100. Call (855) 419-9402 for a free estimate on your specific system.
Can you repair a disconnected duct the same day?
In most cases, yes. A detached run is one of the faster repairs, typically $400 to $850, and can often be handled in a single visit. We answer 24/7 and dispatch fast from 7am to 7pm, Sunday through Friday. Call (855) 419-9402 to book.
How much does it cost to replace a crushed flex duct run?
Replacing one crushed flex run typically costs $450 to $1,200, depending on length, attic access and how much sealing the new run needs. If more than one run is crushed, the estimate is per run, so ask for the total up front. Call (855) 419-9402 for a free written estimate.
Pricing reflects the St. George market as of 2026. Ironwood Air Duct Cleaning offers free estimates. Call (855) 419-9402.
Written by the team at Ironwood Air Duct Cleaning.
What Our Customers Say
"Found a disconnected run in the crawlspace while they were in there and told me about it rather than cleaning around it."
- Shane Norris"Job was done well and the house smells better. There was some dust knocked loose around a couple of the registers that I had to wipe down afterward."
- Paul Pruitt"Two guys, about three hours, plastic down at every register, and they wiped the vent covers before putting them back."
- Neil Ziegler