Whole-home duct cleaning
Dryer vent cleaning
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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.
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- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
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Before
AfterHow Much Does Duct Repair & Sealing Cost in Alameda?
Duct repair and sealing in Alameda typically runs $350 to $1,100 for most single-family homes, with whole-house sealing and insulation projects landing between $1,200 and $2,800. A single disconnected joint or small leak repair often costs under $200. What you pay depends on how much of the system is leaking, how accessible the ductwork is, and whether your 1920s bungalow near the Fernside district still has its original rigid metal runs or has been retrofitted over the decades.
This guide breaks down 2026 Alameda pricing line by line, explains what pushes costs up or down, and shows you how to avoid paying twice for the same job.
Key Takeaways
- Most Alameda duct repair jobs fall between $350 and $1,100; full sealing with insulation runs higher.
- Leaky ducts waste 20 to 30 percent of your heating and cooling, so repair often pays for itself in reduced energy bills.
- Old housing stock in Alameda and the marine climate (cool, damp air off the Bay) both accelerate duct wear and condensation issues.
- Professional equipment matters: rotary brush systems and HEPA-rated vacuums catch what shop vacs miss, and containment gear keeps debris out of your living space.
- Free estimates are standard here. A written quote should show line items, not a single lump sum.
Duct Repair & Sealing Cost Breakdown (2026)
Here’s what Alameda homeowners are actually paying this year. These ranges reflect local labor rates, typical material costs, and the realities of working in an older Bay Area housing market.
| Service | Typical Cost Range | Notes |
|---|---|---|
| Single joint or disconnect repair | $120 – $200 | One accessible leak at a register or plenum |
| Minor leak sealing (small system) | $200 – $400 | Hand-sealing a few leaks with mastic or foil tape |
| Whole-system duct sealing (mastic/foil) | $500 – $1,100 | Most common job for mid-size Alameda homes |
| Duct sealing with aerosol injection | $900 – $2,000 | Seals up to 90% of leaks from inside the duct |
| Section replacement (flex or rigid) | $300 – $700 per run | Crushed, torn, or pest-damaged duct sections |
| Duct insulation replacement | $400 – $900 | R-values below standard, condensation issues |
| Full house duct repair & rebalance | $1,200 – $2,800 | Extensive leaks plus air balancing across zones |
| Duct cleaning + repair (bundled) | $600 – $1,400 | Cleaning before sealing is the right order of operations |
Most Alameda jobs land in the middle. A fifty-year-old home in the East End with a partial attic run and a handful of leaks usually falls in the $500 to $900 range for full hand-sealing. Crawl-space systems in the Bronze Coast area run higher because access is tighter and labor time goes up. Aerosol sealing costs more upfront but reaches leaks you can’t see or reach by hand, so on a home with widespread, hidden leakage it can be the better spend.
What drives cost up: number of leaks, duct location (attic, crawl space, or inside walls), whether you need insulation at the same time, whether sections are crushed or disconnected, and access difficulty. What drives cost down: ducts that are clean and reachable, a single-system home under 1,800 square feet, and combining the work with a routine cleaning visit so mobilization is shared.
What Affects Duct Repair & Sealing Pricing in Alameda
Local pricing isn’t just a national average with a markup. Here’s what makes Alameda jobs specific:
- Housing age and original ductwork. A lot of Alameda homes were built between 1900 and 1950. Rigid metal runs from that era often have failing seams and worn duct tape (the old grey plastic kind that cracks after a decade). Retrofits with flex duct, added later, may be sagging or crushed. Mixed systems take longer to seal correctly, which raises the price.
- Crawl space access. Many island homes have ductwork in tight, low crawl spaces under the house. That’s slower, more physical work than a clean attic run, and the labor reflects it. Homes with generous attic access save $150 to $300 on the same scope of sealing.
- The marine climate. Cool, damp air off San Francisco Bay means condensation on duct surfaces is a real issue. Missing or degraded insulation leads to moisture, which degrades tape and mastic faster than in dry inland climates. We regularly see failing insulation in Alameda homes that would have held up for years if they were ten miles east.
- Attic temperature swings. On warm days Alameda attics can hit 130°F or higher, and that’s hard on plastic flex and old adhesive. On cool nights the system can swing back 60 degrees or more. The duct sees every bit of that, and old components crack.
- Whether cleaning is needed first. Sealing over dust and debris means the sealant fails sooner. Cleaning before sealing is standard practice for a reason. Bundling both is cheaper than two separate service calls.
- System size and zone count. A single-zone 1,400 square-foot home costs less to seal than a 2,800 square-foot home with a zoned system. The number of registers, runs, and plena all factor in.
One more local factor: the way contractors on the island schedule work. Alameda is a tight market and availability varies, but a good company will give you a realistic window. What matters more than speed is that the job is done in the correct order: assess, clean, repair, seal, verify. Skipping steps to save time is the fastest way to pay for the same repair again in two years.
How to Save on Duct Repair & Sealing
A few practical moves lower the price without cutting corners:
- Get a written, line-item estimate. A quote that says “duct repair: $800” tells you nothing. You want the number of leaks found, the sealing method, and the materials. An honest company will walk you through a camera view or flexible scope footage so you can see the leaks yourself. That’s the point of verifiable results.
- Bundle repair with cleaning. Cleaning and sealing together typically costs less than two separate visits because the crew is already set up and the system gets one correct sequence of work. Keeping the duct clean before sealing also extends the life of the seal.
- Address air-quality upgrades at the same time. If you’re already paying for a crew visit, adding a proper filtration upgrade (Honeywell or Aprilaire media filters, for instance) costs far less than bringing a second contractor out later. One call isn’t just convenient, it’s cheaper.
- Ask about Guardsman sealants. Protective sealing and coating products add durability to repaired sections. On older ductwork with recurring issues, the cost of a better sealant is usually less than a second repair.
- Don’t skip the maintenance check. A quick seasonal check of accessible duct connections catches small leaks before they become whole-system failures. This is not a sales pitch, it’s just how ductwork wears.
The best lever on price here isn’t finding the cheapest quote. It’s getting an accurate scope before work begins, so the number you hear on the phone matches the number on the invoice. Free estimates are standard for duct work. To book one, call (833) 620-5944.
Why Professional Equipment Changes What You Pay For
Duct repair pricing is only useful if it results in a properly sealed system. That comes down to tools, and tools are the clearest difference between an honest quote and a cheap one that leaves you with the same problem.
At Everclear Air Duct Cleaning we run professional-grade Rotobrush rotary brush systems and Nikro HEPA-rated vacuum equipment on every cleaning-and-repair job, the same class of equipment used in commercial and remediation-grade projects. That matters because a shop vac doesn’t reduce airborne dust the way a HEPA-rated system does. When we work with Abatement Technologies negative air and containment gear, contaminated debris gets captured and removed rather than redistributed through the house. A cheaper operation without that setup can cost you more in air quality than you save in price.
On the repair and sealing side, we stock and install Honeywell and Aprilaire air-quality products, which means filtration improvements can happen on the same visit as the sealing work. And we use Guardsman protective products on sealing and coating, which adds durability where ductwork is older or has been repaired before. That’s full-system care: assess, clean, repair, seal, and filter improvement, handled from the inside out.
We also handle the full route from that system outward. If you want the repair-and-sealing service in detail, see our Duct Repair & Sealing in Alameda page. If you’re new to the whole process, start from the home page to see how cleaning, repair, and dryer vent service fit together.
Do You Need Duct Repair, Sealing, or Both?
These are different jobs at different price points, and knowing which one you need will keep you from overspending:
- Duct repair fixes physical damage: a crushed section, a disconnected joint, a torn flex run, or a pest-damaged length of duct. It’s usually a targeted fix and often costs $120 to $700 depending on the section.
- Duct sealing closes leaks along seams, joints, and small punctures. It’s broader and runs $500 to $2,000 depending on method and system size.
- Both together is the common case when the system has real damage plus a spread of small leaks. The combined job usually costs less than pricing them separately because the crew makes one trip and follows one sequence.
You can’t always tell from the outside which one you need. Walking around your home, look for these signs: rooms that are hard to heat or cool while other rooms are fine, persistent dust settling on surfaces right after cleaning, a whistling or hissing sound at registers, higher energy bills without a clear cause, and condensation or moisture near duct runs. Those are all worth an inspection. You can get that inspection and a firm price in one visit. Call (833) 620-5944 to schedule.
Signs Your Ducts Need Sealing Before Prices Get Higher
One practical reason to act in 2026 rather than wait: the longer a leak runs, the more likely it damages insulation or pushes moisture into the system. That turns a $350 sealing job into a $900 repair-and-insulation job. The most common warning signs we see on Alameda jobs:
- Rooms closest to the air handler are comfortable while far rooms run 4 to 6 degrees warmer or cooler
- Dust reappears on furniture faster than it should
- You can hear the system leaking air at the register or the plenum
- Energy bills climbed and nothing else in your routine changed
- Visible dust or condensation in a crawl space or attic run
Any of those is reason enough to get the system looked at before something wear-related turns into a bigger repair bill.
FAQs – Duct Repair & Sealing Cost
How much does duct sealing cost in Alameda?
Duct sealing in Alameda typically runs $500 to $1,100 for hand-sealing a standard home, or $900 to $2,000 with aerosol injection, which reaches hidden leaks. Larger systems and crawl-space access push toward the high end. Call (833) 620-5944 for a free quote specific to your home.
Is it cheaper to repair or replace ductwork?
For most homes, repair and sealing costs significantly less than full replacement. A sealed, sound system usually runs $350 to $1,100, while full duct replacement across a whole house commonly starts around $3,000 and goes up from there depending on system size. Replacement only makes sense when ductwork is crushed, badly contaminated, or beyond sealing, and a proper inspection will tell you which category you’re in.
Can you come today?
Same-day scheduling isn’t guaranteed, but our first step is always to lock down the details so the visit is right the first time. Call (833) 620-5944 and we’ll schedule an assessment and give you a firm estimate.
How long does duct sealing take?
Hand-sealing a standard Alameda home takes most of a day, roughly four to six hours. Aerosol sealing is often faster during setup because it’s done from inside the duct. Repairs to a single section usually take one to two hours.
Does duct sealing actually lower energy bills?
Yes, and the numbers are concrete. Leaky ducts can waste 20 to 30 percent of the air moving through the system. Sealed ducts typically recover most of that, which shows up over a season of energy bills. On a typical Bay Area home, sealing often pays back within a few years, and the repair improves comfort in the meantime.
Get a Straight Answer on Price
Ductwork is the part of your system you never see, which is exactly why pricing should be clear before anyone starts working. We believe the work should be visible and confirmable: see the leaks, see the fix, see the difference. So we show it. We bring the right equipment (Rotobrush rotary brush systems, Nikro HEPA-rated vacuums, and Abatement Technologies containment gear), we use Honeywell and Aprilaire products where filtration improvements make sense, and we do the repair, sealing, and cleaning under one roof so there’s no handoff gap.
If you’re not sure whether your system needs repair, sealing, or just a good cleaning, call (833) 620-5944 for a free estimate. We’ll tell you what the system needs and what it costs, in writing, before any work begins.
Pricing reflects the Alameda market as of 2026. Everclear Air Duct Cleaning offers free estimates – call (833) 620-5944.
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."
- Paul Schaefer"Quoted per system rather than the bait and switch per vent pricing everybody else in town uses. The number I was told on the phone was the number on the invoice."
- Kurt Walsh"Job was done well and the house smells better. There was some dust knocked loose around a couple of the registers that I had to wipe down afterward."
- Miguel Reyes