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 South Gate?
Duct repair and sealing in South Gate typically runs $275 to $650 for a single accessible repair or a focused sealing job, and $850 to $1,900 or more when a whole system’s worth of disconnected joints, crushed flex runs and leaking plenum connections needs to be corrected at once. The number that lands on your written estimate depends on how many breaks there are, whether the ducts sit in the attic or under the house, and how much of the run has to be opened up to reach it. We set the price per job by written estimate, and the estimate is free.
Here’s what we see most in South Gate’s housing stock: older ranch and mid-century tract homes with original sheet metal trunks and flex branches that have been patched, spliced and re-taped over the years. The tape dries out, the flex sags off its collars, and the system starts leaking into the attic instead of into your rooms. That’s the leak that shows up as a hot room in July and a higher bill in August, not as an obvious hole you can see.
Key Takeaways
- Single repair or localized seal: roughly $275-$650.
- Whole-system sealing and reconnect work: roughly $850-$1,900.
- Replacement of a collapsed or crushed duct run: roughly $300-$800 per run.
- Attic and crawlspace access, run length and the number of breaks drive the price more than anything else.
- You get a free written estimate before any work starts, with the price set per job.
If you’ve been putting this off because you’re not sure the ducts are actually the problem, start with a duct cleaning South Gate inspection. A technician who has a camera in the system can tell you in a few minutes whether you’re looking at a cleaning issue, a repair issue, or both. Call (855) 925-0879 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Duct Repair & Sealing Cost Breakdown (2026)
These are typical estimated ranges for work in South Gate. Treat them as a planning tool, not a quote, the written estimate after an on-site look sets the final price.
| Work item | Typical estimated range | What it covers |
|---|---|---|
| Single duct repair (reconnect, re-tape, re-mastic a joint or collar) | $275 – $450 | One or two accessible breaks in a flex or sheet metal run |
| Sealing a section of ductwork (mastic and mesh at joints, boots and plenum) | $350 – $650 | Sealing leaks in a defined area of the system |
| Full system sealing and reconnect | $850 – $1,900+ | All accessible joints, boots, plenum and trunk connections on a whole-house system |
| Replace a crushed or collapsed flex run | $300 – $800 per run | New insulated flex, new collars, correct support and slope |
| Repair a disconnected plenum or trunk connection at the air handler | $400 – $900 | Often the single biggest leak in a system |
| Seal and insulate ducts in an unconditioned attic | $700 – $1,600 | Sealing plus duct insulation in a hot attic space |
| Duct cleaning before repair (recommended when the system is dirty) | $300 – $700 | Rotobrush brush-and-vacuum cleaning of supply and return runs |
What pushes a job toward the top of a range: multiple breaks rather than one, ducts buried under blown insulation in an attic, a system where the flex branches have been re-run badly by a previous installer, and any repair that needs a section of ceiling or drywall opened to reach a boxed-in trunk. What keeps it at the lower end: one obvious disconnected collar at a register boot, a sheet metal trunk that’s intact except for failed tape, and easy access through a big attic hatch or an open crawlspace.
One thing to know before you compare numbers from different companies: some bids are for cleaning and label the intent as repair. Cleaning a duct doesn’t seal it. If the leak is still there after the vacuum is packed up, the number you paid was for the wrong job. We repair ducts, not just clean them, and we’ll tell you plainly which one your system needs.
What Affects Duct Repair & Sealing Pricing in South Gate
- Where the ducts run. South Gate homes split into two groups: those with ducts in the attic and those with ducts in a raised foundation crawlspace. Attic work in the summer heat is slower, and crawlspace work means working low and tight. Both add labor time, and labor time is most of the price.
- How many breaks you have. A single disconnected boot is a short visit. Twelve failed joints across a system is a full day. Most of the price difference between the $275 and $1,900 ends of our range comes down to count.
- The material. Flex duct is fast to replace. Sheet metal trunks and custom transitions take fabrication time. If a section of trunk has to be rebuilt to fit an odd framing cavity, that’s sheet metal work at sheet metal rates.
- Access and interior repair. If a leak sits above a finished ceiling with no attic path to it, the price includes opening and closing the ceiling, which usually means a drywall patch and paint on top of the duct work itself.
- Whether the system is dirty. Sealing a leaking duct that’s full of dust and debris seals the debris in. On a system that hasn’t been cleaned, we usually recommend cleaning first. Our Nikro HEPA-rated vacuum and Abatement Technologies negative-air equipment capture what gets dislodged rather than pushing it back into your living space, which matters if anyone in the house has allergies or asthma.
- Whether the repair is tied to an air quality system. If you have a Honeywell or Aprilaire filtration or humidity system tied into the ductwork, the repair has to account for how that equipment connects to the return. Getting that right means the repair doesn’t fight the filtration system later.
Local climate does shape this work more than people expect. South Gate summers push attic temperatures high enough that duct tape adhesive gives up on a joint that’s been fine for years. Heat cycling is hard on flex collars and on the mastic at plenum connections. We see more failed joints in late summer and early fall than any other time of year, right when the cooling bill is already high and the leak is quietly making it higher.
How to Save on Duct Repair & Sealing
The cheapest repair is the one you catch before a small leak takes out a whole run. A few practical things that lower the bill:
- Get the whole system looked at once, not one joint at a time. A technician who sees the full layout can bundle the accessible repairs into one visit. Calling us out three separate times for three disconnected boots costs more than catching all three at once.
- Clean and repair in the same visit when the system needs both. Two trips mean two mobilization costs. We note on the estimate when cleaning is recommended before sealing, so you can decide with the real numbers in front of you.
- Don’t accept tape-only repairs on a joint that’s failed before. Mastic and mesh outlast tape on a joint that gets hot. A repair that lasts is cheaper than a repair you repeat.
- Ask about the dryer vent while the technician is already there. Dryer vent cleaning is a fire-safety service, and clogged vents are a documented cause of residential fires. If your vent hasn’t been checked in years, the same visit is the economical time to do it.
- Get the estimate in writing before work starts. Our estimates are free and price is set per job by the written estimate, so you’re never looking at a number that changed after the fact.
If you’re a property manager with several units in the same building or on the same block, get all of them looked at together. Shared systems and shared attic spaces are common in South Gate’s denser residential blocks, and the per-unit cost goes down when the access work only happens once. Call (855) 925-0879 for a free estimate.
Duct Repair vs. Duct Replacement: Which Makes Sense in South Gate?
Repair is usually the right call when the ductwork is structurally sound and the problems are at the joints, collars and connections. Replacement becomes the better answer when the runs themselves are failing: crushed flex that can’t be re-shaped, insulation that’s broken down and gone, or a system that was installed undersized and has been struggling since day one.
The rough math most homeowners run: if the repair estimate lands under about a third of what a full replacement would cost, repair is usually the sensible move. Above that, it’s worth asking whether you’re paying to keep a failing system on life support. A full replacement of a residential duct system in South Gate generally runs well above our repair range, so a repair in the $275 to $650 band usually pays for itself quickly in reduced leakage. If you’re weighing it, ask for both numbers on one written estimate and compare them side by side.
One caution on the replacement decision: a sales pitch that says replace based on age alone is a red flag. The right question is whether the ducts are still doing their job, and that’s answered by looking inside them.
Do You Need Duct Sealing or Duct Cleaning First?
Cleaning first, sealing second, is almost always the correct order on a dirty system. Sealing a leak without cleaning first leaves the debris where it sits, and sealing pulls dust into a tighter space around the breach. Cleaning also shows you what the camera can’t: how many failed joints are actually there once the dust is out of the way.
That’s the reason our cleaning work uses Rotobrush rotary brush systems to agitate and extract debris from the duct walls, not just vacuum the center of the duct. The brush contacts the surface. The Nikro HEPA-rated vacuum captures what comes off. Abatement Technologies negative-air containment keeps the working area under pressure so dislodged debris gets captured, not recirculated into your living space. If you’ve read this far and want to verify the equipment, the names are real and worth looking up. South Gate homeowners can ask for a walkthrough of the tool setup before work starts, and we’re happy to show it.
If the system is clean and the leaks are the only issue, skip straight to repair and sealing. A technician can tell you which situation you’re in within a few minutes of looking.
FAQs – Duct Repair & Sealing Cost
How much does duct repair cost in South Gate?
Most duct repair jobs in South Gate run $275 to $900, with the typical repair landing in the $400 to $600 range. Full-system sealing and reconnect work climbs to $850 to $1,900 or more. The written estimate after an on-site look sets the final price, and the estimate is free. Call (855) 925-0879 for an exact quote.
Is it cheaper to repair or replace the ductwork?
Repair is usually cheaper when the duct runs are still structurally sound and the failures are at joints and connections. A repair job in the $275 to $650 range is typically far less than a full replacement. Replacement only comes out ahead when the runs themselves are crushed, collapsed or badly undersized. Call (855) 925-0879 and we’ll put both numbers on one estimate so you can compare.
How much does it cost to seal leaky ducts in South Gate?
Sealing a section of ductwork typically runs $350 to $650, and full-system sealing runs $850 to $1,900 or more. Attic insulation and sealing combined usually lands in the $700 to $1,600 range depending on the square footage and the state of the existing insulation. Estimates are free, and the written estimate sets the final price.
Can you repair ducts the same day?
Yes, for single accessible repairs that we can reach without opening walls or pulling a permit. Same-day repair is common for disconnected boots, failed collars and leaking plenum connections. Whole-system sealing is usually booked as a scheduled visit. Call (855) 925-0879 for a free estimate and we’ll tell you what’s realistic for your system. We answer 24/7, with fast dispatch from 7am to 7pm.
How often should ducts be cleaned in South Gate?
Most homes here do well with cleaning every three to five years, sooner if you’ve had a renovation, water intrusion or pets. Sealing should come before or alongside cleaning on any system with visible leaks. Dryer vent cleaning is a separate schedule and should be checked more often, since a clogged vent is a documented fire hazard. Pricing for cleaning typically runs $300 to $700. Call (855) 925-0879 for a free estimate on your specific system.
Get a Written Estimate on Your Ducts
If your ducts are leaking, the repair number is usually smaller than the ongoing waste from leaving it. We give free written estimates, we set the price per job, and we’ll show you exactly what we found and why the price is what it is. Duct Cleaning South Gate has been serving homeowners and property managers since 2013, and the work is done with Rotobrush, Nikro and Abatement Technologies equipment you can verify by name.
Call (855) 925-0879. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. Need to reach us outside that dispatch window? We answer 24/7. A call outside dispatch hours is booked into the next opening, Sunday through Friday, 7am to 7pm.
Pricing reflects the South Gate market as of 2026. Duct Cleaning South Gate offers free estimates – call (855) 925-0879.
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."
- Brandon Lin"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."
- Shane Schaefer"Found a disconnected run in the crawlspace while they were in there and told me about it rather than cleaning around it."
- Jeff Vaughn