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 Gilroy?
Duct repair and sealing in Gilroy typically costs $350 to $1,800, depending on how much ductwork is compromised and whether the seams are accessible. Small fixes like resealing a handful of joints and reconnecting one run of flex duct usually land near the lower end, while replacing damaged rigid trunk sections or sealing a whole attic system pushes toward the top. Every job is quoted with a free written estimate before we start, so the number you see is the number you pay.
Here’s the honest version of that range: ducts fail in ways that don’t show up until you get eyes on them. We inspect before we quote because the difference between a $350 reseal and $1,400 in replacement often comes down to a single crushed section behind a register or a taped joint that a previous installer never got right. Our duct cleaning gilroy service exists for the same reason. We look first, then we tell you what needs fixing and what doesn’t.
Duct Repair & Sealing Cost Breakdown (2026)
These are typical estimated ranges for Gilroy in 2026. They cover the work itself, labor and materials together.
| Line item | Typical estimated range |
|---|---|
| Diagnostic inspection and written estimate | Free |
| Mastic sealing of accessible joints (per joint) | $25 – $60 |
| Air duct repair, single connection or run | $150 – $400 |
| Flex duct replacement (per run, up to 15 ft) | $300 – $650 |
| Rigid metal duct section replacement | $450 – $950 |
| Sealing a full attic or crawlspace duct system | $800 – $1,800 |
| Register or boot repair and reseal | $120 – $350 |
| Duct cleaning added to a repair visit | $350 – $700 |
What pushes a quote up: concealed runs, ductwork buried under insulation, a system that’s a patchwork from three previous installers, or damage spread across multiple branches. What pulls it down: easy attic access, damage limited to a few joints, and a system that’s otherwise sound. If the ducts are already being cleaned, sealing goes faster because the surfaces are exposed and clean. That’s one reason we like to handle cleaning and repair on the same visit when the job allows it.
In a typical Gilroy home, the attic gets hot enough in summer that duct tape dries out and peels within a few years. The failure is rarely the metal or flex duct itself; it’s the tape and old mastic at the joints. Mastic doesn’t dry out the way fabric tape does, and it holds through thermal cycling far better. That’s what we seal with.
What Affects Duct Repair & Sealing Pricing in Gilroy
A few things decide where your number falls in that range:
- Where the damage is. Ductwork in an open attic or crawlspace is quick to reach. Ducts buried under blown insulation or boxed into a soffit take longer to access and put back, and that shows up in the price.
- How widespread the leaks are. A handful of failing joints is a spot repair. A system where the tape has let go in ten places is a full-system seal, and that’s a different job.
- Flex versus rigid duct. Flex duct is cheaper to replace per foot than rigid metal sections, but it also tears and sags more easily. Rigid trunk sections cost more but hold up better long term. We’ll tell you which you have and what makes sense.
- Seasonal heat and attic conditions. Gilroy’s summers run hot enough that attic ductwork goes through real thermal swings. Ducts that were sealed with fabric tape often show it within a few years; the joints closest to the attic fan or the hottest part of the roof deck tend to fail first. We check those first because they’re the most likely culprits.
- Prior work. Ducts that have been patched and re-taped multiple times can be tricky to seal reliably. Sometimes a clean replacement of that section costs less over time than chasing the next leak.
- System size and number of branches. A two-zone system with many branch runs takes longer to seal than a single-zone layout, and labor reflects that.
How to Save on Duct Repair & Sealing
None of these require a coupon or a membership. They’re just the practical things that keep the bill down:
- Get the whole system inspected before you approve anything. A leak that’s fixed in one spot while a bigger one sits untouched wastes money. A full inspection in a single visit is why we quote the way we do.
- Combine cleaning and sealing on the same trip. When the ducts are cleaned first, the joints are exposed and clean, and sealing is faster. When you combine the two services in one visit, you don’t pay for a second trip out.
- Fix small leaks before they become big ones. A reseal at $25 to $60 per joint is a lot cheaper than a flex duct replacement at $300 to $650 per run.
- Address airflow problems early. If you’re noticing weak airflow at some registers while others are strong, that’s a sign of a leak or a disconnected run. Getting it checked before summer heat ramps up avoids the bigger job.
- Ask for the written estimate to distinguish repair from replace. In some cases, replacing one damaged section is cheaper than trying to seal a section that’s too far gone. Get the comparison in writing so you can make the call yourself.
Free estimates are the starting point here. Call (833) 589-9833. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. We’ll come out, inspect the system, and give you a written estimate. The price is set by that estimate and doesn’t move.
How Long Does Duct Repair and Sealing Take?
Most repair and sealing jobs in Gilroy run from two hours to a full day. A single connection or a few joints is a two- to three-hour visit. Sealing a full attic system takes most of a day. Flex run replacements take two to four hours per run. If cleaning is added to the same visit, add another two to three hours. We inspect before we clean and we’ll tell you upfront how long your job will take. Fast dispatch from 7am to 7pm means we can often fit inspection and repair into the same day.
Can You Repair and Seal Ducts in One Visit?
Yes. That’s the point of hiring a company that does both cleaning and repair. If a technician finds a disconnected flex run during cleaning, they can reattach and seal it on the spot. If they find a crushed rigid section, they can replace it. Not every duct cleaning company can do this. We carry the tools for both, and we use a Nikro HEPA vacuum while we work, so what gets loosened gets captured rather than pushed back into your living space. Our Gilroy customers get the full picture in one visit: what’s wrong, what it costs, what we recommend and why.
What’s the Difference Between Duct Repair and Duct Sealing?
Repair fixes physical damage: a disconnected run, a crushed section, a hole, a torn flex duct. Sealing closes the gaps at the joints, seams, and connections where air escapes. Many systems need both. The price ranges overlap because the two are often done together. If you’re not sure which you need, the inspection will tell you. Sealing alone is cheaper, but if a run is physically broken, sealing won’t fix it.
Do You Offer Duct Sealing for Homes With Honeywell or Aprilaire Systems?
Yes. If your system has Honeywell or Aprilaire components, the technician will work around the existing setup without disturbing it. Sealing should never compromise ventilation controls or filtration components. If you have an IAQ system and are considering duct sealing, let us know at booking so we can prepare. We’re familiar with both brands and know how to work around them.
Is Duct Sealing Worth the Cost in Gilroy?
In most cases yes, especially if you’re seeing weak airflow or high energy bills. Sealing accessible joints in a typical Gilroy home runs $800 to $1,800 and addresses leaks that waste conditioned air year-round. Small spot repairs at $25 to $60 per joint are a cheaper starting point if the leaks are limited. The real number depends on the inspection. Call (833) 589-9833 for a free estimate and we’ll tell you what we find.
FAQs About Duct Repair & Sealing Cost in Gilroy
How much does duct repair cost in Gilroy?
A single duct repair in Gilroy runs $150 to $400. That covers reconnecting a run, patching a hole, or replacing a boot. Larger jobs with multiple repairs or a section of rigid duct replacement fall between $450 and $950. Call (833) 589-9833 for a free estimate.
How much does duct sealing cost?
Sealing accessible joints in a Gilroy home typically costs $25 to $60 per joint. A full-system seal in an attic or crawlspace runs $800 to $1,800. If sealing is combined with duct cleaning on the same visit, the total is usually less than booking both separately. Call for a free estimate to get your specific number.
Can I repair duct leaks myself?
Some tape-and-mastic work on accessible joints can be done by a handy homeowner, but ductwork in an attic or crawlspace presents real risks. Whether it’s heat, insulation, tight clearances, or sharp edges, an attic is not a safe place to be crawling around if you’re unsure. A trained technician can inspect, test, and seal the system correctly and can also find leaks you might miss. Our technicians handle that work every day.
What does full duct sealing include?
A full seal typically includes mastic-sealing all accessible joints, connections, and seams, plus reconnecting any loose runs. If the system is being cleaned first, the technician cleans, dries if needed, then seals. The final price is set by the written estimate, which itemizes each step.
When should I repair vs. replace my ductwork?
If the damage is limited to a few joints or one run, repair is cheaper. If the system is repeatedly failing or the duct runs are in poor shape, replacing that section costs less in the long run. Duct replacement for a single flex run is $300 to $650; a full sealing job is $800 to $1,800. The written estimate will give you both options so you can choose.
How Does Gilroy’s Climate Climate Affect Duct Sealing Costs?
Gilroy gets hot in summer, and attic temperatures climb well past outdoor air temps. That heat dries out fabric tape, and tape that was holding a joint three years ago peels and lets go. When that happens, conditioned air escapes into the attic before it ever reaches a room. We see this most often in homes with ductwork running through an unconditioned attic. The fix is the same: mastic and new connections rather than tape. We quote based on what we find in the inspection, not a one-size-fits-all number.
Contact Us for a Free Estimate
If you’re not sure what your ductwork needs, we’ll come out and look. Call (833) 589-9833 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. We use Rotobrush and Nikro professional systems, and we repair ducts as well as clean them, so the person who finds the problem can fix it. You’ll get a written estimate before we start, and the price won’t move unless the scope changes and you approve it. If you have an Abatement Technologies containment unit or Honeywell and Aprilaire equipment in place, tell us at booking and we’ll plan around it.
Pricing reflects the Gilroy market as of 2026. Duct Cleaning Gilroy offers free estimates – call (833) 589-9833.
Written by the team at Duct Cleaning Gilroy, serving Gilroy since 2011.
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."
- Yolanda Herrera"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."
- Craig Anderson"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."
- Matt Hoffman