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 San Clemente?
Duct repair and sealing in San Clemente typically runs $350 to $1,800 for a single-family home, with most jobs landing between $500 and $900. Small leaks and single-joint seals sit at the low end, while a collapsed flex run, a disconnected trunk, or a full-house seal-and-balance job pushes toward the top. We give free written estimates so you know the number before anyone touches a duct.
San Clemente homes are mostly ranch and two-story builds from the 1960s through the 1990s, and time plus our mild, dry summers do the same thing to duct systems everywhere: tape dries out, mastic cracks, flex duct sags. The crawlspaces and attics under these homes get hot in August and cool the rest of the year, which works on joints slowly. Homeowners usually call us after a room stops heating evenly or the electric bill creeps up, not because they can see a leak.
Key Takeaways
- A typical duct repair and sealing job in San Clemente costs $500 to $900.
- Leak sealing alone is cheaper; replacing a crushed or disconnected duct section costs more.
- Free estimates, and we can often fold repair into a scheduled Monarch Air Duct Cleaning visit.
- Fast dispatch from 7am to 7pm, Sunday through Friday. We answer 24/7.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s where the money goes. These are typical estimated ranges for San Clemente homes, and your written estimate sets the final price.
| Line item | Typical estimated range | What it covers |
|---|---|---|
| Sealing a few leaky joints | $350 – $550 | Mastic and metal-tape work on accessible joints in attic or crawlspace |
| Whole-system seal (mastic + mesh) | $650 – $1,200 | Sealing every reachable joint, seam, and connection from plenum to registers |
| Reconnect a disconnected duct | $250 – $500 | Refit, reseal, and secure one separated flex or rigid run |
| Replace a damaged duct run | $300 – $800 per run | Remove crushed or torn flex, install new insulated duct, seal at both ends |
| Repair a main trunk or plenum | $600 – $1,400 | Larger repair where the trunk line joins the air handler |
| Reroute a duct around an obstacle | $400 – $900 | New path where a run is pinched or blocked by framing or equipment |
| Full cleaning plus repair in one visit | $900 – $1,800 | Cleaning, then repair and sealing on the same service trip |
What moves the price up: parts of the system you can’t reach without extra access, a run buried under insulation, a plenum repair that calls for sheet metal work, or several damaged runs at once. What keeps it down: easy access through a garage or pull-down attic stair, a problem found while we’re already cleaning, and simple tape-and-mastic fixes rather than new duct.
We carry the duct repair side of the business alongside cleaning and dryer vent work, so you don’t hire a second contractor when a leak shows up mid-clean. The same equipment goes up with us: a Rotobrush rotary-brush system, a Nikro HEPA-rated negative-air vacuum, and Abatement Technologies filtration gear on site for contamination control. That’s the standard remediation crews use, applied to a residential duct system.
What Affects Duct Repair & Sealing Pricing in San Clemente
- Attic heat and long dry stretches. San Clemente’s summers bake attics, and the constant heat-and-cool cycle works on tape and mastic joints across the hundreds of homes built in the area’s established neighborhoods. Systems that run through that swing for years need resealing, and resealing the whole system costs more than fixing one joint.
- House age and duct material. Older builds often have rigid sheet metal duct sealed with old cloth-backed tape; newer ones use flex duct. Flex is quicker to replace but easier to crush or pull loose. The material decides whether we repair or replace.
- Crawlspace and attic access. A pull-down stair or a clean crawlspace hatch keeps labor down. A system with tight access or a low-clearance crawl space takes longer, and that labor shows up on the estimate.
- Number of problem runs. One disconnected run is a small job. Four runs plus a leaking trunk is a bigger day. We count them on the estimate so the number doesn’t move later.
- Whether cleaning is needed first. Repairing a duct that’s full of dust and debris isn’t the right first step, and sealing over contamination just traps it. When cleaning and repair both make sense, doing them in one visit usually costs less than two separate appointments.
- Air quality upgrades you choose. Because we work with Honeywell and Aprilaire products, you can add filtration or humidity control while we’re in the system. That’s optional and priced separately, but it’s easier to plan alongside a repair than to schedule later.
How to Save on Duct Repair & Sealing
A few practical moves keep the bill down without cutting corners.
- Get the free estimate first, in writing. A number on paper you can compare beats a verbal ballpark. Call (866) 282-7304 and we’ll come look at the system before anyone quotes a fix.
- Bundle cleaning with repair. If the ducts are due for cleaning anyway, having the repair done on the same visit saves a second trip and usually a bit of labor. Our San Clemente service page covers what a cleaning visit includes.
- Fix small leaks before they spread. One dried joint sealed early costs a fraction of a trunk repair later. Leaks also pull in attic dust, so the air quality win starts early too.
- Ask us to check the whole system while we’re in it. The costliest mistake is sealing one leak when three more are twelve inches away. We inspect the run end to end.
- Don’t skip the dryer vent. Dryer vent cleaning is a fire-safety service, not just a comfort one. Clearing a clogged vent reduces a documented fire risk and can be scheduled with the duct visit.
Can Duct Repair and Sealing Be Done the Same Day?
Often, yes. Small sealing jobs, single-run reconnects, and repairs found during a cleaning visit usually finish in one trip. Larger trunk repairs or several damaged runs may take a full day or require a return visit for a specific part. When you call, we’ll tell you what to expect based on what you describe and confirm it once we see the system. Fast dispatch from 7am to 7pm, Sunday through Friday. We answer 24/7, and a call outside dispatch hours gets booked into the next opening.
Should You Seal Ducts or Replace Them?
For most San Clemente homes, sealing and targeted repair win. Full duct replacement usually only makes sense when the system is badly deteriorated, crushed in multiple places, or sized wrong for the house, and that’s a much larger project than sealing. If two or three runs are damaged and the rest is sound, repair and seal is the practical choice. We’ll say so honestly on the estimate and tell you when replacement is the better long-term call.
FAQs – Duct Repair & Sealing Cost
How much does duct repair and sealing cost in San Clemente?
Most San Clemente duct repair and sealing jobs run $500 to $900, with the full range at $350 to $1,800 depending on how many runs need work and how hard they are to reach. Call (866) 282-7304 for an exact quote. Estimates are free.
Is it cheaper to repair ductwork or replace it?
Repair is almost always cheaper. Sealing a few joints runs $350 to $550, while a single damaged run replacement is $300 to $800, and full system replacement is a much bigger project. Repair and seal is the right call unless the system is failing in several places at once.
How much does it cost to seal a whole duct system?
Whole-system sealing typically costs $650 to $1,200 in San Clemente, covering every reachable joint, seam, and connection. The written estimate sets the final number after we see how much of the system is accessible.
Can you come today for a duct problem?
Often we can. Same-day service is available depending on the schedule. We answer 24/7, and crews dispatch 7am to 7pm, Sunday through Friday, so a morning call usually means a same-day visit. Call (866) 282-7304.
Does duct repair help with dust and allergies?
Yes, a sealed system pulls less attic and crawlspace dust into your air. A leaky duct is a direct path for debris, and sealing it closes that path. Paired with cleaning and proper filtration, it’s one of the more effective things you can do for indoor air quality.
Why Homeowners in San Clemente Call Monarch
Better air starts inside the walls, where you can’t see the problem. We clean it, we clear it, and we fix it, so the same team that finds a leak can repair it. You see the process, not just the promise: the Rotobrush and Nikro equipment, the Abatement Technologies filtration, the Honeywell and Aprilaire parts we know. No coupon-crew shortcuts, no passing you to a second contractor when the work gets structural. We’ve served homes across Orange County since 2012, and 14 years in this trade has taught us the difference between a fast fix and one that holds.
Get Your Free Estimate
Every duct system is different, and a quote without a look is a guess. Call (866) 282-7304. We answer 24/7, fast dispatch from 7am to 7pm, Sunday through Friday, and the estimate is free. We’ll inspect the system, explain what we find, and put a written price in front of you before any work begins.
Written by the team at Monarch Air Duct Cleaning, serving San Clemente since 2012.
Pricing reflects the San Clemente market as of 2026. Monarch Air Duct Cleaning offers free estimates – call (866) 282-7304.
What Our Customers Say
"Two guys, about three hours, plastic down at every register, and they wiped the vent covers before putting them back."
- Henry Yang"They photographed every return and supply before starting and sent me the file afterward. No upsell to a sanitizing treatment I didn't need."
- Megan Bennett"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."
- Robert Anderson