Whole-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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AfterHow Much Does Duct Repair & Sealing Cost in Cumming?
Duct repair and sealing in Cumming, GA typically costs between $350 and $1,200 for most single-family homes, with the average job landing around $575 to $750 when it involves a combination of mastic sealing, a few flex-duct reconnections, and a post-work pressure test. Homes with more extensive damage – collapsed sections, disconnected trunk lines, or significant air loss in a two-story layout – can run $1,200 to $2,400 before any structural repairs are factored in. Every CleanRun estimate is delivered in writing before a panel comes off, so you’ll know the exact number before any work starts.
Duct Repair & Sealing Cost Breakdown (2026)
The table below reflects what CleanRun sees in the Cumming market day to day. Prices cover parts and labor. Homes in newer subdivisions like Vickery, Polo Golf & Country Club, and the Windermere corridor often have flex-duct systems installed between 2000 and 2015 that are now showing age – sagging sections, tape failures, and loose boot connections are the most common findings on camera. Older ranch-style homes near downtown Cumming or in the Lake Lanier-adjacent neighborhoods frequently have metal duct systems with different sealing needs.
| Service | Typical Cost Range (Cumming, GA) | Notes |
|---|---|---|
| Mastic sealant application (per duct run) | $45 – $95 | Applied at joints, seams, and boot connections |
| Aeroseal whole-home duct sealing | $1,100 – $2,200 | Pressurized sealant injected from inside – seals gaps inaccessible by hand |
| Flex duct reconnection (per section) | $65 – $130 | Common in Cumming homes built 1995-2010 |
| Flex duct replacement (per linear foot) | $12 – $28 | Includes removal and proper disposal of failed sections |
| Metal duct sealing (tape + mastic, per section) | $55 – $110 | Foil tape alone is insufficient long-term; mastic is the trade standard |
| Boot-to-floor/ceiling seal repair (per register) | $35 – $75 | Stops conditioned air from escaping into wall cavities or crawl spaces |
| Plenum box repair or resealing | $120 – $280 | Plenum is the main distribution chamber at the air handler |
| Collapsed or crushed duct section repair | $175 – $400 | Common after pest intrusion or in tight crawl-space systems |
| Full duct pressure/leakage test (pre- and post-work) | $95 – $175 | Measures actual leakage rate in CFM25 – verifiable data, not a visual estimate |
| Whole-home duct repair (moderate damage, 2,000 sq ft home) | $575 – $1,200 | Most common scope for Cumming single-family homes |
| Whole-home duct repair (extensive damage or full flex replacement) | $1,400 – $2,600 | Larger homes, significant pest or moisture damage, or full system re-run |
What pushes a job toward the high end of those ranges is usually one of three things: access difficulty, scope discovery on camera, or system age. A home in Cumming’s Lanier Lakes area with a tight crawl space and original flex duct from a 1998 build is almost always more labor-intensive than a comparable home in North Haven with an accessible attic and ductwork installed in 2018. That’s not a sales pitch – it’s a measurement problem. The technician has to physically reach every section being repaired, and the time that takes is real cost.
Aeroseal sits at the top of the price range because it’s a different technology category entirely. Rather than sealing gaps by hand – which requires access to each section – an Aeroseal setup pressurizes the duct system and injects an atomized sealant that finds and fills leaks from the inside. It’s most cost-effective when leakage is distributed across many small gaps rather than concentrated in a few large separations. A duct pressure test before quoting tells you which scenario you’re actually in.
What Affects Duct Repair & Sealing Pricing in Cumming
- System type – flex duct vs. sheet metal. Most Cumming homes built between 1990 and 2015 use flexible duct (a foil-wrapped insulated tube that connects at branch fittings). Flex duct fails at the collar connections and at points where it was kinked during installation or has sagged over time. Sheet metal systems – more common in older homes near the Cumming city center or in custom builds – need different sealing chemistry (mastic over foil tape) and tend to hold up longer once properly sealed. Labor time varies significantly between the two.
- Location and accessibility of the duct runs. Attic systems are almost always faster to work on than crawl-space systems. In Forsyth County, a notable percentage of homes in neighborhoods like Sharon Springs and Bethelview Estates have split systems – part attic, part crawl space – which adds scope and time. If a technician is working flat in a 22-inch crawl space at a home near Lake Lanier during July, that’s billable labor time, not filler.
- Extent of air leakage, confirmed by a pressure test. A visual inspection can catch the obvious failures: separated flex sections, disconnected boots, visible gaps at the plenum. A duct blaster test (measuring leakage in CFM25 – cubic feet per minute at 25 pascals of pressure) gives you an actual number. Cumming homes with high leakage scores often have multiple contributing locations that aren’t visible without pressurizing the system first. More leakage points mean more labor to address each one.
- Duct age and material condition. Flex duct older than 20 years often has degraded inner liner and insulation that crumbles when handled. Repairing sections of that duct is sometimes less cost-effective than replacing the run entirely. A technician who photographs the interior before quoting – and shows you what the camera found – is giving you data to make that call rather than a pitch for upsell.
- Whether duct cleaning is combined with repair. Sealing ductwork that hasn’t been cleaned in several years is technically backward: you’re trapping debris on the interior side of a sealed system. CleanRun typically recommends cleaning first, then sealing – which affects overall project scope but usually reduces the total cost compared to two separate mobilizations. The combined job price for a 2,000 sq ft home in Cumming runs approximately $850 to $1,500 when cleaning and sealing are scoped together.
- Forsyth County permit requirements. Most duct repair and sealing jobs in Cumming do not require a separate mechanical permit if the work doesn’t involve modifying the air handler or replacing a major duct trunk. Full duct system re-runs or work connected to an HVAC replacement typically do involve permit pulls under Forsyth County’s current mechanical code. If a quote doesn’t mention permit status and the scope is large, ask – it’s a concrete question with a concrete answer.
BeforeAfterHow to Save on Duct Repair & Sealing in Cumming
The most direct way to avoid overpaying is to get a scope-specific written quote before agreeing to anything. That sounds obvious, but a lot of Cumming homeowners have called us after accepting a “$79 special” from a service that discovered problems requiring additional work – quoted verbally, after the crew was already in the attic. A written price delivered before work starts isn’t a courtesy; it’s the only way you can make an informed decision.
A few specific ways to manage cost on our Duct Repair & Sealing services in the Cumming market:
- Get a leakage test before committing to Aeroseal. Aeroseal is a legitimate technology, but it costs more than hand-sealing for a reason. If your leakage is concentrated in a handful of accessible joints – which a duct blaster test can confirm – mastic sealing those locations by hand will get you 80 to 90 percent of the improvement at a fraction of the cost. The test itself runs $95 to $175 and pays for itself immediately if it tells you Aeroseal isn’t the right fit for your system.
- Bundle duct cleaning and sealing in the same visit. Two mobilizations to the same home mean two sets of setup time, two trips across Forsyth County traffic, and two invoices. When cleaning and sealing are scoped together, the combined price is consistently lower than the sum of two separate jobs. Call (678) 693-5322 and ask specifically about combined-scope pricing – CleanRun puts the bundled number in writing alongside the line items so you can see where the savings come from.
- Use the Free Second Opinion on any written estimate. If you have a written quote from another company, CleanRun will put our own number next to theirs – in writing – at no charge. This is not a pressure tactic; it’s how a documented-evidence business operates. You may find the quotes are close and choose the other company. You may find a significant difference and want to understand why. Either way, you have two written numbers to compare rather than one.
- Address duct issues before replacing the HVAC unit. Cumming HVAC contractors regularly see this sequence: a homeowner replaces a 15-year-old system, gets a new high-efficiency unit, and then wonders why the energy bills barely moved. The answer, confirmed by leakage testing, is usually that 25 to 40 percent of the conditioned air was escaping into the attic through the old ductwork that no one looked at during the equipment swap. Repairing ducts costs a fraction of a system replacement and often delivers a bigger efficiency gain per dollar spent.
- Don’t delay small repairs. A single disconnected flex collar at a branch fitting costs $65 to $130 to fix. Left unaddressed through a Georgia summer – where Cumming sees sustained temperatures above 90 degrees and humidity levels that make unconditioned attic air genuinely damaging to pull into living space – that one connection can put meaningful strain on the blower motor and inflate cooling bills for months. The repair cost is fixed; the operating cost from ignoring it accumulates every day.
FAQs – Duct Repair & Sealing Cost in Cumming, GA
How much does duct sealing cost for a typical Cumming home?
For a 2,000 to 2,500 sq ft single-family home in Cumming, mastic-based duct sealing typically runs $450 to $950 depending on the number of duct runs, system accessibility, and how many connection points need treatment. Homes with crawl-space ductwork or systems older than 15 years tend toward the upper end. Aeroseal whole-home sealing – a pressurized injection process – costs more, typically $1,100 to $2,200, and is most appropriate when leakage is widespread and distributed. Call (678) 693-5322 for a written line-item quote specific to your address and system.
Is it cheaper to repair or replace ductwork in Cumming?
Repair is almost always less expensive in the short term. Full duct replacement in a 2,000 sq ft Cumming home generally costs $3,500 to $7,000 or more depending on system layout and access. Repair and sealing of a system with moderate damage typically runs $575 to $1,400. The decision isn’t purely about cost, though – it also depends on the age and condition of the existing duct material. Flex duct over 20 years old with degraded liner may cost nearly as much to repair properly as to replace, because failed material can’t hold sealant reliably. A camera inspection and pressure test before quoting gives you the data to make that call based on your actual system, not a general rule.
Can you get same-day duct repair service in Cumming?
Same-day availability depends on current scheduling and the scope of the job – smaller repairs (a disconnected boot, a single failed flex section) can often be completed the same day CleanRun is contacted. Larger repair projects involving full-home sealing or multiple duct runs typically require a scheduled visit so the right equipment and crew are staged properly. All calls to (678) 693-5322 are answered by a live person, not a voicemail system, so you’ll get a real answer about availability rather than a callback window.
Does duct sealing actually lower energy bills in Cumming?
Yes, measurably so – but the improvement depends on how leaky the system was before sealing. EPA research and field data from Georgia HVAC contractors consistently show that residential duct systems lose 20 to 30 percent of conditioned air through leaks before sealing. In a Cumming home running central air for six to eight months of the year, that loss adds up. After sealing, homeowners with high pre-repair leakage rates typically see monthly cooling bill reductions of $40 to $120, which pays back a $600 sealing job within one to two cooling seasons. A post-work leakage test gives you a before-and-after CFM25 number so the improvement is documented rather than estimated.
What’s included in a CleanRun duct repair estimate in Cumming?
Every CleanRun estimate includes a written, line-item price delivered before any work begins – this is Haven Standard Clause 1, not an option. The written scope identifies which duct runs or connections are being addressed, what materials are being used (mastic, replacement flex, foil-backed tape), and what the total cost is. After the job, you receive a Documented Photo Record of every duct run that was accessed – interior photos before and after work, delivered as a standard part of the job record, not as an add-on. The 365-Day Done Right Promise covers every repair: if something isn’t right within 365 days of the job, CleanRun makes it right. That commitment is in writing on every job, not subject to manager approval after the fact.
Do I need a permit to repair ductwork in Cumming, GA?
Most residential duct repair and sealing jobs in Cumming – resealing joints, reconnecting flex sections, replacing a damaged duct run – do not require a separate mechanical permit under Forsyth County’s current code when the work doesn’t modify the air handler or significantly alter the system layout. Work connected to an HVAC unit replacement or a full duct system re-run does typically require a permit pull. When CleanRun scopes a project that may trigger permit requirements, that’s identified in the written estimate before work begins. If you’re comparing quotes and permit status isn’t mentioned in the written scope, it’s worth asking directly – the answer affects both timeline and cost.
What the Work Actually Looks Like on a CleanRun Job in Cumming
Before any repair work starts, a CleanRun technician walks the system with a camera. Not a flashlight – a camera, because the photos become part of the job record you receive when we’re done. In Cumming homes, the camera regularly finds things that don’t show up on a visual walk-through: a flex collar at the second-floor branch that separated from the fitting by two inches sometime in the past three winters, a plenum connection on the supply side of the air handler where the mastic cracked and pulled away, or a run in the crawl space that a pest control visit displaced from its hanger six months ago.
Those findings determine the written scope. The scope determines the written price. The written price is in your hand before anything is touched.
The repair itself uses trade-standard materials: UL 181-rated mastic sealant applied by brush at every joint and connection, foil-backed UL 181B tape as a mechanical backup where the geometry calls for it, and new flex duct from the same insulation class as the existing system when replacement is part of the scope. The equipment we use to test and verify – including diagnostic tools consistent with the professional-grade standards of the Duct Repair & Sealing in Cumming service we deliver – is named on the job record so you can look it up independently.
After the repair, the system is tested again. Pre- and post-work leakage numbers are recorded. The photo record is compiled – interior shots of every duct run addressed, before and after – and delivered to you as a standard deliverable. You don’t have to ask for it. It’s part of what a job at CleanRun looks like.
Tomas Reyes built CleanRun on a simple premise: the camera shows you the truth before the technician says a word about what needs to happen next. That applies to pricing too. If the camera shows a single disconnected boot and the quote reflects a single disconnected boot repair, that’s what gets fixed. If the camera shows a system with 11 compromised connections and degraded flex throughout, the written scope will say exactly that – and you’ll decide what to address and in what order.
CleanRun vs. the $79 Coupon: What the Price Difference Actually Reflects
Cumming homeowners searching for duct repair regularly encounter heavily discounted offers from services that price the visit, not the work. The technician arrives, performs a brief inspection, and discovers that the work actually needed isn’t covered by the coupon price. Additional services are quoted verbally, often after equipment is already staged. The homeowner is in a position to either accept an unplanned cost or ask the crew to pack up.
CleanRun doesn’t operate that way – not because it’s better marketing, but because it’s structurally incompatible with Haven Standard Clause 1. A written price before any work starts means the scope is defined before anyone opens an access panel. It’s a slower process upfront: the camera inspection, the written scope, the leakage test if needed. It takes more time than sending a technician with a vacuum and a verbal quote. But it means the number you’re given is the number you pay.
Since Tomas Reyes founded CleanRun in 2013, more than 52,000 homes have been served with a written price before work started and a documented photo record when the crew left. Every job in Cumming operates the same way – a home in Windermere gets the same written scope process as a home in Sharon Springs or off Matt Highway near the Forsyth County line.
Key Takeaways
- Most Cumming duct repair and sealing jobs cost $350 to $1,200; extensive damage or Aeroseal runs $1,200 to $2,400+.
- System type (flex vs. metal), accessibility, duct age, and measured leakage rate are the main cost drivers in this market.
- A duct pressure test ($95 to $175) before committing to Aeroseal can determine whether hand-sealing will achieve the same result at lower cost.
- Bundling duct cleaning with sealing in a single visit consistently costs less than two separate jobs.
- Every CleanRun estimate is written and delivered before work begins – Haven Standard Clause 1.
- The 365-Day Done Right Promise is in writing on every job. If it’s not right within a year, CleanRun makes it right.
- Documented photo records of every duct run – before and after – are a standard deliverable on every visit, not a premium option.
- A Free Second Opinion on any competitor’s written estimate is available at no cost – call (678) 693-5322.
Get a Written Estimate for Duct Repair & Sealing in Cumming
If you’re working with a number from another company, or if you want to start from scratch with your own inspection, CleanRun will give you a written, line-item estimate before anything is touched. No verbal ballparks. No “we’ll know more once we get in there.” The price is written before the first panel comes off.
For homes across Cumming – Windermere, Vickery, Sharon Springs, Polo Golf & Country Club, North Haven, the neighborhoods along Post Road and Bethelview, and the Lake Lanier-adjacent areas throughout Forsyth County – call (678) 693-5322. A live person will answer and schedule a time that works. Bring a competitor’s written estimate if you have one; CleanRun will put its number next to theirs on paper, and you’ll decide from there.
You can also learn more about the full scope of what we do at home or go straight to the service details on our Duct Repair & Sealing in Cumming page.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Cumming, serving Cumming, GA since 2013.
Pricing reflects the Cumming market as of 2026. CleanRun Air Duct Cleaning Cumming offers free estimates – call (678) 693-5322.
What Our Customers Say
"My allergies genuinely improved. They also told me the ducts did not need sealing, which I had been quoted for elsewhere."
- Petra K."The dryer vent was almost completely blocked with lint. They showed me the photograph and I understood immediately why the dryer had been running twice."
- Lucia M."They found a disconnected duct in the crawl space that had been dumping conditioned air under the house for years. Photographed it, quoted the repair, fixed it."
- Devon A.