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 Allen?
Duct repair and sealing in Allen typically costs $350 to $1,800, with most single-area repairs landing between $450 and $850. Full-home sealing of a duct system that has never been touched tends to run $900 to $1,800, while a small disconnected joint or torn flex run can often be fixed for under $500. The written estimate you get before any work starts is what sets your final price.
What’s inside your ducts decides what the job actually is. A loose joint at a plenum is a quick afternoon. A trunk line crushed during a remodel is a different project with a different number. That gap is why a phone quote never holds up and an on-site look does.
Key Takeaways
- Most Allen duct repair jobs fall in the $350 – $1,800 range.
- Sealing pays for itself because leaking ducts push heated and cooled air into the attic and garage instead of the rooms you pay to condition.
- Repair and cleaning are different jobs. If the ducts are also dirty, doing both in one visit costs less than two separate calls.
- Collin County homes built through the 1990s and 2000s often have flex duct in the attic, and that’s where we find most disconnected runs.
- We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s how the work breaks out by scope. These are typical estimated ranges for the Allen market, not a fixed menu, and the written estimate is what sets the final price.
| Line Item | Typical 2026 Range | What It Covers |
|---|---|---|
| Single joint or connection repair | $350 – $550 | Reconnecting a separated flex run, reseating a boot, replacing a torn collar |
| Small section replacement (up to 20 ft) | $450 – $900 | Cutting out crushed, torn or collapsed duct and fitting new insulated run |
| Plenum and trunk line repair | $600 – $1,200 | Sheet metal patching, sealing at the air handler, fixing a trunk that’s come apart |
| Spot sealing (accessible joints and boots) | $300 – $600 | Mastic and tape at reachable connections, register boots, closet chases |
| Full-system sealing with pressure check | $900 – $1,800 | Every accessible joint and gap sealed, followed by a duct leakage test to confirm improvement |
| Whole-home duct replacement | $2,500 – $6,000 | New insulated duct throughout, when the existing system is beyond repair |
What pushes a job toward the top of the range: ductwork in a cramped attic that’s hard to reach, a system with multiple separate failures, or flex duct that’s been chewed through by rodents. What keeps it low: one clean break in an accessible spot, or sealing a handful of joints you can already see leaking. We don’t invent a number over the phone. An on-site look at the attic, the plenum, and the register boots tells us what the job actually is.
Most companies clean. We also repair. That matters here because a leak you can’t fix just re-dirties the ducts you paid to clean.
What Affects Duct Repair & Sealing Pricing in Allen
Two identical-looking leaks in two Allen houses can price differently. Here’s what moves the number.
- Where the ducts run. This is the biggest driver. Attic ductwork on a June afternoon in Allen reaches temperatures well above what the outdoor air reads, and it’s often laid out tight to the joists. Patching a run on hands and knees near the ridge takes longer than the same size patch in a wide open crawl. We’re not charging more for comfort; we’re charged for time, and that time is real.
- Duct material. Flex duct is quick to reconnect but tears easily and tends to sag. Rigid sheet metal holds up but needs metal work to patch. Older Allen neighborhoods off the traditional blocks often have rigid trunk lines still in good shape and flex branches that have failed, so the repair is mixed. That mix is common and it’s fine; it just changes the labor.
- How many failures there are. One leak is a repair. Five leaks across two branches is a sealing job, and per-leak pricing stops making sense. We price by scope once we’ve seen the whole system.
- Whether the ducts also need cleaning. A repaired duct that’s full of dust, drywall grit, or allergen matter is a half-done job. Combining cleaning and repair in one visit costs less than two separate visits because the equipment is already set up and the attic is already open. If your ducts haven’t been cleaned, that’s a good reason to do it now.
- Old Allen construction. Homes built during Allen’s growth years often had duct systems sized for the original HVAC setup. If a previous owner replaced the air handler and the plenum wasn’t reworked to match, you get gaps at the connection. That’s a repair we see often in the region and it’s cheap to fix once it’s found.
- Dryer vent access. Not a duct repair item exactly, but we check it while we’re there. A clogged or crushed dryer vent is a fire risk, and it’s the kind of thing you’d rather know about. Our dryer vent cleaning handles that safely with proper containment equipment.
How to Save on Duct Repair & Sealing in Allen
None of these are tricks. They’re the things that actually keep the final bill down.
- Get the estimate before the truck is loaded. We give free estimates, and a written number is what we hold to. If a quote changes once the attic hatch opens, ask why and get the reason in writing. That protects you.
- Bundle dirty-duct cleaning with the repair. Doing both in one visit means the crew sets up once, seals once, and confirms clean air afterward. Separate visits cost more because you pay for setup twice.
- Ask for a duct leakage check. You can’t manage what you can’t measure. A pressure test before and after sealing tells you whether the money went to real leaks or to good intentions. Ask for it explicitly.
- Don’t let a leak ride. A disconnected run pushing cold air into an Allen attic all summer is a steady monthly loss on your electric bill. Repairing it early is cheaper than repairing it after the compressor has been working overtime for two seasons.
- Have the register boots checked. Loose boots that don’t meet the floor or wall are a common source of quiet leaks. Sealing them is quick and it reduces the dust that gets pulled into the house.
Call (866) 452-2744 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
What’s Actually Involved in a Duct Repair?
A duct repair starts with finding out where the system is leaking, then fixing it so it stops. We look at the plenum where the air handler meets the trunk, the trunk line itself, every branch takeoff, and the register boots where duct meets the room. In Allen homes with attic ductwork, a flashlight and a careful eye find most of it, though a pressure test catches gaps you’d never spot by eye.
Repair itself depends on what failed. A disconnected flex run gets reconnected, strapped, and sealed. A crushed section gets cut out and replaced with insulated duct of the same size. Sheet metal gets patched and sealed with mastic. Sealing is the part that gets skipped by crews in a hurry, and it’s the part that matters most: a joint that’s reconnected but not sealed will leak again within a season.
We bring professional-grade equipment to the job, including Rotobrush and Nikro systems for duct cleaning. Repair is the same logic: the right tools for the diagnosis, and the right materials for the fix. For air quality filtration components, we work with Honeywell and Aprilaire. For containment and negative air during heavier remediation, we use Abatement Technologies equipment.
Repair, Seal, or Replace? How to Decide in Allen
Most ductwork in Allen that’s still connected can be repaired and sealed. Full replacement is a rarer call, and we’d rather not lead with it. A reasonable rule: if repairs exceed about half the cost of a full replacement, or if the duct insulation is falling apart across several branches, replacement starts to make financial sense. Otherwise, repair the leaks and seal the system.
What we won’t do is seal over a dirty system. Dust, drywall grit, and biological growth in the ducts get sealed in along with the air if the cleaning isn’t done first. That’s why we clean and repair as related parts of one job. If you want the cleaning side on its own, our duct cleaning Allen page covers it in detail.
Why Duct Sealing Pays Off in Allen’s Summer Heat
Allen summers are long and hot, and that makes duct leakage expensive. A system leaking 15 to 20 percent of its cooled air into an attic doesn’t just lose cooling; it makes the air handler run longer to hold the thermostat, and longer run times cost money. Sealing takes the leaks out of the loop. The same holds for heating in the cooler months, just at a smaller scale.
One more thing worth knowing: air quality. Sealed ducts pull in less attic air, which means less insulation fiber, less dust, and fewer allergens entering the home. If anyone in the house has asthma or allergies, sealing is often the cheapest air quality improvement available.
We serve the Allen area and can schedule a look at your ductwork. If you’d rather come in knowing what the job should cost, the table above is a good starting point.
FAQs – Duct Repair & Sealing Cost
How much does duct repair cost in Allen?
Most duct repairs in Allen cost $350 to $1,200. A single disconnected joint runs $350 to $550, while a trunk line and plenum repair lands around $600 to $1,200. Call (866) 452-2744 for an exact quote. Estimates are free.
How much does whole-home duct sealing cost in Allen?
Whole-home duct sealing in Allen typically costs $900 to $1,800, including a pressure test to confirm the seal. Spot sealing of a few accessible joints costs $300 to $600. Call (866) 452-2744. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Is it cheaper to repair or replace ductwork?
Repair is almost always cheaper if the existing duct is still structurally sound. Replacement typically runs $2,500 to $6,000 in Allen, so repair and sealing wins unless the duct system is failing in multiple places at once. Call (866) 452-2744 to have it looked at.
Can you come today?
Same-day duct repair is often possible. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. If you call outside that window, we book you into the next opening. Call (866) 452-2744 for a free estimate.
Does duct sealing actually lower energy bills in Allen?
Yes, when the system actually leaks. Sealed ducts keep conditioned air in the rooms you’re paying to cool. We check every joint and boot before recommending it, so you only pay for sealing you need. Call (866) 452-2744.
Pricing reflects the Allen market as of 2026. Duct Cleaning Allen offers free estimates – call (866) 452-2744.
Written by the team at Duct Cleaning Allen.
What Our Customers Say
"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."
- Cedric Robinson"Fair price and thorough work. They ran about an hour and a half past the estimated finish time, so don't schedule anything tight after."
- Sofia Guzman"Ran a negative air machine on the whole system rather than the shop vac on a stick that the cheap outfit down the road uses. Showed me the before and after photos from inside the trunk line and it was genuinely disgusting."
- Marco Hernandez