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 Simi Valley?
Duct repair and sealing in Simi Valley typically runs $350 to $1,800 for most homes, with small mastic-and-tape seals on a few joints landing near the low end and partial duct replacement across a full trunk line reaching the high end. Whole-home sealing and reconnection work on an older, leaky system most often falls between $650 and $1,200. The written estimate you get before any work begins sets the final price, and that estimate is free.
Here’s what that money actually buys, because “duct repair” means different things to different contractors. A proper job starts with finding where the system is losing air or pulling in dust, then fixing it at the source: sealing seams and joints, reconnecting runs that have come loose from a boot or plenum, patching crushed flex, or replacing a section that has collapsed. We’re Duct Cleaning Simi Valley, and the reason we quote repair alongside cleaning is simple: cleaning a leaking system just means it gets dirty again faster. Fix the leaks, then the cleaning holds.
Key Takeaways
- Most duct repair and sealing jobs in Simi Valley land between $350 and $1,800.
- Small joint-and-seam sealing is the cheapest fix; partial duct replacement is the most expensive.
- Duct repair quoted with cleaning usually costs less than booking two separate contractors.
- Older Simi Valley housing stock tends to have ducts more prone to disconnects and crush damage.
- Estimates are free. Call (855) 353-2270 for a number before you commit to anything.
Duct Repair & Sealing Cost Breakdown (2026)
Pricing below reflects what we see quoted for this work in the Simi Valley market in 2026. Treat each line as a typical estimated range, not a fixed menu: your written estimate is the number that matters.
| Service | Typical Price Range | What It Covers |
|---|---|---|
| Sealing accessible joints and seams | $350 – $650 | Mastic or foil-tape on disconnected trunks, plenum edges, and boot connections you can reach |
| Reconnecting a loose run | $250 – $550 | Reattaching one duct run that has separated from its register boot or plenum |
| Partial duct replacement (flex or rigid) | $600 – $1,400 | Replacing crushed, torn, or rodent-damaged sections, typically a few runs |
| Whole-system sealing and reconnection | $650 – $1,200 | Sealing every accessible joint across a full system and reconnecting all loose runs |
| Extensive repair with trunk replacement | $1,200 – $1,800 | Rebuilding failing trunk sections, often on older rigid-metal systems |
| Repair combined with duct cleaning | $700 – $1,600 | Rotary-brush extraction plus repair in a single visit |
What pushes a job up or down is mostly access and extent. If we can reach every joint through a normal attic or crawlspace without removing anything, that’s simpler and cheaper than a system buried under finished ceilings or boxed behind drywall. The age and material of the ductwork matters too. Rigid metal runs that have separated at the takeoff are a focused fix; old, sagging flex that’s crushed flat in three places is more time and more material. And if contamination is the concern, not just leakage, the job includes the abatement-grade tools and cleaning labor to address it properly, which adds cost but solves the actual problem in one visit.
One more factor that shapes the number: whether repair and cleaning happen together. When a technician is already in the attic with a rotary-brush extraction rig, sealing a joint two feet away is a small addition to the job. Booking a cleaning company and a separate repair contractor means two visits, two truck rolls, and often a cleaning done on a leaky system that should have been fixed first. If your ducts are both dirty and leaking, doing it in one visit is almost always the better call.
What Affects Duct Repair & Sealing Pricing in Simi Valley
- How accessible the ductwork is. Simi Valley homes with a straight, open attic run make for a faster job. Systems boxed under finished ceilings or threaded through tight crawlspaces take longer, and labor is the biggest line in your estimate.
- Duct material and age. Rigid metal ducts fail differently than flex. Older systems tend to have more disconnects and crush damage, which means more material and more time on the repair.
- Number of problem spots. One loose boot connection is a quick fix. Six separated runs across a sprawling single-story ranch pick up cost with each one.
- Whether cleaning is included. Contamination, heavy dust, or post-renovation debris adds cleaning labor. We use Rotary-brush extraction rigs rather than compressed air, so debris is physically removed, not redistributed through the house.
- Filtration and IAQ equipment already in the system. Homes running a Honeywell or Aprilaire whole-home filtration or humidity system need that equipment worked around, not bypassed. The technicians know how these systems interact with duct cleanliness.
- Local climate effects on ductwear. Simi Valley’s warm, dry inland air and the temperature swing between attic and living space put steady thermal stress on duct connections. Attics get hot in summer, and that cycle of expansion and contraction is exactly what loosens taped joints over time.
Can You Fix a Leaky or Disconnected Duct the Same Day?
Often, yes. Most reconnection and sealing jobs on accessible ductwork are handled in a single visit, because our technicians can repair damaged ductwork on the spot, not just document it. That’s the practical difference of having Air Duct Repair as a core service rather than a referral to a separate contractor. Call (855) 353-2270. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. A call outside dispatch hours is booked into the next opening.
How to Save on Duct Repair & Sealing
The single best way to keep duct repair costs down is to catch leaks early. A disconnected joint is an easy seal. Left for a season, the leak pulls hot, dusty attic air into the system, and you end up paying for both the repair and the cleaning. A few practical moves:
- Get the repair and cleaning quoted together. One visit with one crew is cheaper than two contractors, and the cleaning actually holds when the system is sealed.
- Ask what’s accessible before work starts. If a technician can show you the loose joints and explain the plan, you can decide what to fix now and what can wait.
- Don’t seal it yourself with consumer tape. The hot attic temperatures in Simi Valley can lift ordinary duct tape, and the fix fails within a season. Use the same visit to have it done with the right mastic and foil.
- Treat dryer vent cleaning as part of the same conversation. Dryer vent cleaning isn’t an add-on afterthought. It’s a fire-safety service we take as seriously as the ducts, and having it done alongside duct work reduces the number of times you need a crew at the house.
- Ask for a free estimate in writing. That document is the price. Nothing gets added later without your say. Call (855) 353-2270 and we’ll walk the system and quote it.
Should You Repair the Ducts or Replace the Whole System?
Repair almost always wins on cost. A targeted repair-and-seal job in Simi Valley runs $350 to $1,800, while replacing an entire duct system is a much larger project. Replacement makes sense when the ducts are collapsing across most of the system, badly contaminated with mold or pest damage, or sized wrong for the equipment. For most homes, sealing and repairing the existing system is the pragmatic call, and a technician can tell you which category you’re in after looking at it.
What Does Duct Sealing Actually Do for My Energy Bill?
Sealed ducts keep conditioned air where it belongs: in your rooms, not your attic. We won’t quote you a savings percentage, because that number depends on how leaky your system is and how you run it. What we can say is that a system losing air through disconnected joints runs longer to hit the same temperature, and sealing those joints stops the loss. The repair pays for itself in comfort first: rooms that were always too hot or too cold start feeling closer to the rest of the house.
Do I Need Duct Cleaning Before or After Repair?
Repair first, then cleaning, or both together in one visit. Cleaning a leaky system is wasted effort, because the leaks pull dust right back in. When the technician is already set up with Rotary-brush extraction, he can seal the joints and clean the runs in the same session, and the system stays cleaner longer.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in Simi Valley?
Duct sealing in Simi Valley typically costs $350 to $650 for accessible joints and seams, and $650 to $1,200 for sealing a full system. The range depends on how many joints are reachable and how much of the ductwork can be accessed without opening walls. Call (855) 353-2270 for a free estimate specific to your system.
Can you fix a disconnected duct the same day?
In most cases, yes. An accessible disconnected run is often reconnected and sealed in a single visit. If the disconnect is behind finished drywall or needs major trunk work, the technician will explain the scope and schedule the follow-up before leaving. Call (855) 353-2270 to book a look.
Is it cheaper to repair or replace leaky ducts?
Repair is almost always cheaper, typically $350 to $1,800 against the much larger cost of a full replacement. Replacement is only the right answer when most of the system is failing, badly contaminated, or the wrong size. Ask for a written estimate and the two options side by side.
Does duct repair include cleaning?
Not unless you ask for it, but bundling saves money. A combined repair-and-clean visit typically runs $700 to $1,600, and the cleaning actually holds once leaks are sealed. We work with Rotary-brush extraction and Nikro systems, so debris is removed rather than blown around.
How do I know if my ducts need repair or just cleaning?
Look for rooms that never heat or cool properly, dust settling faster than usual after cleaning, or visible disconnected joints in the attic or crawlspace. Those point to leaks, which mean repair. If the air quality is the concern, we have the abatement-grade tools to address contamination properly. Call (855) 353-2270 and a technician can tell you which you’re dealing with.
Get a Free Duct Repair Estimate in Simi Valley
Duct problems are one of the few home issues that get cheaper the sooner you catch them. A loose joint sealed now is a focused fix. Left alone, it turns into a dirty system, worse comfort, and two jobs instead of one. Duct Cleaning Simi Valley has been serving Simi Valley since 2013, and we quote repair, sealing, cleaning, and dryer vent work with the same straightforward approach: look at the system, explain what we found, and put the price in writing. Call (855) 353-2270 for a free estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
Written by Duct Cleaning Simi Valley, Owner at Duct Cleaning Simi Valley, serving Simi Valley since 2013.
Pricing reflects the Simi Valley market as of 2026. Duct Cleaning Simi Valley offers free estimates. Call (855) 353-2270.
What Our Customers Say
"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 Martinez"They photographed every return and supply before starting and sent me the file afterward. No upsell to a sanitizing treatment I didn't need."
- Daniela Morales"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."
- Laura Sullivan