Duct Repair & Sealing Cost - We Measure the Leak Before We Quote

Every visit starts with

Whole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents

Worth knowing

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

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Before & after – our own jobs

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How Much Does Duct Repair & Sealing Cost in Atlanta?

Our Duct Repair & Sealing services in Atlanta, GA typically cost between $350 and $1,200 for a standard single-family home, with most CleanRun jobs landing in the $450-$850 range depending on duct condition, access, and the type of repair needed. Aeroseal or mastic-based full-system sealing on larger homes – think 2,500+ square feet in Sandy Springs or East Cobb – can run $1,200 to $2,800. Every price is written down before a single panel comes off; that’s Haven Standard Clause 1, and it applies to every job without exception.

Duct Repair & Sealing Cost Breakdown (2026)

Below are the actual price ranges CleanRun sees across Atlanta-area homes in 2026. These reflect real jobs – not national averages copied from a trade publication.

What Pushes the Price Up

Three things move duct repair costs higher in Atlanta faster than anything else. First, attic access. A home in Candler Park with a low-pitch roof and a pull-down stair that opens into a 120-degree attic in June takes more time to work in safely than a basement mechanical room in a Brookhaven split-level. That time is real labor and it’s priced accordingly. Second, the number of duct connections. A two-story home with a two-zone system might have 50 or 60 mastic joints to seal; a simple ranch in College Park might have 20. Third, duct material condition. Flex duct that has been compressed at an elbow for 15 years, or sheet metal with decades of tape failure, sometimes can’t be sealed – it has to be replaced. The camera shows that before we price it.

What Keeps the Price Down

Good access, a relatively new system with intact liner, and a repair limited to one or two discrete breach points all keep costs toward the lower end of the ranges above. If a competitor’s written estimate is higher than what you see here, CleanRun offers a free second opinion – we put our number next to theirs in writing, and you decide. That offer has no strings attached.

What Affects Duct Repair & Sealing Pricing in Atlanta

• Attic temperature and working conditions. Atlanta’s attics routinely reach 135-145°F from June through September. That heat accelerates flex duct liner degradation – which is why we see more material failures here than in cooler markets – and it limits how long a technician can safely work in the space per session. Jobs scoped during peak summer sometimes require staged access, which affects labor cost.
• Duct material type. Flex duct, rigid sheet metal, and fiberglass duct board each require different sealing approaches and materials. Flex duct repairs are generally fastest; sheet metal reseal with mastic takes longer per linear foot because of surface prep. Homes built before 1985 in neighborhoods like Inman Park or Lake Claire often have mixed systems – some flex added to original sheet metal – which adds complexity.
• Number of breach points or disconnected runs. A single disconnected run in the crawlspace is a one-technician, two-hour job. A system with six compromised joints spread across an attic and a crawlspace is a half-day job. The camera inspection documents every breach point before we write the price.
• System size and duct run count. Larger Atlanta homes – the 3,000-4,500 square foot inventory common in Sandy Springs, Johns Creek, and Milton – often have two or three air handlers, each with its own supply and return duct network. Each zone is quoted and photographed separately.
• Permit requirements. Duct repair work in Atlanta that involves replacing more than 25 linear feet of duct or modifying the air handler connection may require a mechanical permit through the City of Atlanta’s Office of Buildings or the relevant county authority (Fulton, DeKalb, Cobb, Gwinnett). CleanRun scopes permit requirements as part of the written price – no surprises after the job is done.
• Sealing method chosen. Mastic sealant is the workhorse – durable, code-compliant, and appropriate for most residential repairs. Aeroseal is a pressurized computer-guided process that seals leaks the technician can’t physically reach; it costs more but verifies leakage reduction with hard numbers before and after. The right method depends on what the camera shows and what the homeowner’s efficiency goals are. Both are explained in plain language before any price is written.
• Accessibility of crawlspace or basement runs. A crawlspace that is properly encapsulated with clearance for a technician to maneuver is workable. A Decatur bungalow with an 18-inch unconditioned dirt crawlspace is a different job. We quote for actual conditions, not assumed ones.

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Atlanta-Specific Context: Why Duct Integrity Matters More Here

Atlanta’s climate creates duct problems that milder markets don’t see at the same rate. The combination of high summer humidity – the city averages 71% relative humidity in July – and attic temperatures that exceed 140°F puts unusual stress on flex duct liner, mastic seals, and the aluminum tape that installers often use as a shortcut instead of proper mastic (aluminum tape is not HVAC-code compliant for permanent duct sealing in Georgia; it fails at temperature extremes).

Return-side duct leaks are a particular problem in Atlanta homes. When a return duct disconnects or develops a gap, the air handler pulls hot, humid attic air directly into the system before it can be conditioned. That air ends up at your supply registers – not as cooled air, but as hot humid air that forces the system to run longer and struggle to reach setpoint. In homes we’ve serviced in East Atlanta Village and Reynoldstown, a single disconnected return run in the attic has been the cause of $300-plus monthly electric bills in July and August. Once sealed, the system behavior changes within the first billing cycle.

In the Virginia-Highland and Morningside areas, we regularly find original sheet metal ductwork from the 1960s where the longitudinal seams have separated over decades of thermal cycling. Those seams can’t be sealed from inside the duct; they require physical access and mastic applied to the exterior joint. It’s not dramatic work, but it’s documented before and after with photographs so the homeowner can see exactly what was done.

Our Duct Repair & Sealing in Atlanta service page covers the full process, including how we document every repair and what the written scope looks like before a job starts.

How to Save on Duct Repair & Sealing in Atlanta

Start With a Camera Inspection, Not an Assumption

The single best way to avoid overpaying for duct repair is to know exactly what needs repair before any work starts. A camera inspection documents the actual condition of every duct run – breach locations, material failures, debris accumulation at elbows – so the written price reflects real conditions, not a technician’s ballpark estimate based on square footage. At CleanRun, the camera documentation is part of the standard process; you see what we see before you agree to anything.

Address Duct Repair Before HVAC Replacement

A new air handler or heat pump installed into a leaking duct system will underperform from day one. Atlanta HVAC contractors sometimes quote duct sealing as an add-on to equipment replacement; getting independent duct repair quotes first – before the equipment decision is made – keeps you from accepting bundled pricing without a clear breakdown. Call (470) 495-9370 and we’ll write a duct-only scope so you have a real number to compare.

Combine Duct Repair With Duct Cleaning

If the duct system also needs cleaning, scheduling both on the same visit reduces the total cost compared to two separate service calls. Access panels come off once, the camera runs once, and the technician’s drive time and setup is shared across both scopes. The written price covers both line items separately so you can see exactly what you’re paying for each service.

Get a Second Opinion on Any Written Estimate

If you already have a written estimate from another company, CleanRun will put its own number next to it in writing at no charge. This isn’t a sales tactic – it’s a concrete offer with no obligation. The comparison is documented so you can make the decision with real numbers in front of you. Call (470) 495-9370 to schedule.

Don’t Let Small Leaks Become Large Ones

A single disconnected duct joint costs $95-$220 to repair. Left unaddressed for a full Atlanta summer, that same breach can accelerate moisture damage to surrounding insulation and, in crawlspace installations, contribute to subfloor moisture problems. Fixing it now is cheaper than fixing it plus the secondary damage later.

Verify That the Price Is Written Before Work Starts

This sounds obvious, but it protects you from the most common complaint in the duct service industry: the verbal quote that grows after the panels come off. Under Haven Standard Clause 1, CleanRun delivers a written price before any work begins – no exceptions, no “we’ll know more once we’re in there” language. If a company won’t put the price in writing before starting, that’s information worth having.

FAQs – Duct Repair & Sealing Cost in Atlanta

How much does duct sealing cost in Atlanta, GA?

Duct sealing in Atlanta costs $350 to $1,100 for most single-family homes, depending on system size and the number of joints that need mastic applied. Aeroseal whole-home sealing – which uses pressurized sealant injected through the duct system and verifies results with a computer measurement – runs $1,400 to $2,800 for larger homes. Every CleanRun job is priced in writing before work starts; call (470) 495-9370 for a written estimate specific to your home’s system.

Is it cheaper to seal ducts or replace them?

Sealing is almost always cheaper than replacement – typically by a factor of three to five. A duct section that costs $180-$290 to replace might cost $45-$80 to seal, if the liner and structure are still intact. The camera inspection determines which approach is appropriate: liner collapse, sustained compression, or structural failure generally require replacement; intact duct with breach points or failed joint seals is a sealing job. CleanRun photographs the condition of every run before writing the price so the recommendation is documented, not verbal.

How long does duct sealing last?

Properly applied mastic sealant lasts 20 to 30 years under normal conditions. Aeroseal’s manufacturer specifies a similar lifespan. In Atlanta’s high-attic-temperature environment, the longevity difference between mastic and aluminum tape is significant – tape fails at temperature extremes and is not code-compliant for permanent duct sealing under Georgia’s mechanical code. All sealing work performed by CleanRun is covered by the 365-Day Done Right Promise; if a sealed joint fails within that period, we come back and make it right at no charge.

Can leaking ducts raise my electric bill in Atlanta?

Yes, and the impact in Atlanta is measurable. The U.S. Department of Energy estimates that leaking ducts account for 20-30% of conditioned air loss in a typical home. In a market where July cooling bills regularly reach $200-$400 for a 2,500-square-foot home, a 20% efficiency loss is $40-$80 per month in wasted energy – per cooling season. Return-side leaks are particularly costly because they force the air handler to condition hot, humid attic air instead of recirculating already-conditioned interior air. We’ve documented this pattern repeatedly in Atlanta homes, particularly in Kirkwood, East Lake, and Edgewood where original duct systems haven’t been touched since installation.

Does duct repair require a permit in Atlanta?

Minor repairs – sealing joints with mastic, reattaching a disconnected flex duct run – generally do not require a mechanical permit in Atlanta. Work that involves replacing more than a threshold quantity of duct material, modifying the air handler connection, or altering the duct layout may require a permit from the City of Atlanta Office of Buildings or the applicable county authority. The threshold varies by jurisdiction; Fulton County, DeKalb County, Cobb County, and Gwinnett County each have their own mechanical permit rules. CleanRun identifies permit requirements as part of the written scope before any work begins – it’s part of what the written price covers, not an afterthought.

What is Aeroseal duct sealing and is it worth it in Atlanta?

Aeroseal is a process in which a non-toxic polymer sealant is injected under pressure through the duct system. The particles travel through the air stream and accumulate at leak points, sealing them from the inside – including joints and small breaches that can’t be physically reached by a technician. A computer measures duct leakage before and after, so the result is verified with a number, not an estimate. In Atlanta, where two-story homes with multiple duct zones and attic routing make physical access to every joint impractical, Aeroseal is worth serious consideration when duct leakage is measured above 15% of system airflow. The cost – $1,400 to $2,800 for most Atlanta homes – pays back faster in a market with high summer cooling loads. Whether it’s the right call for a specific home depends on what the baseline leakage measurement shows; CleanRun explains that measurement in plain language as part of the written scope.

How do I know if my ducts are leaking?

Four signs are common in Atlanta homes. First, rooms that won’t cool to setpoint even when the system runs continuously – often the room farthest from the air handler on a run with a mid-line breach. Second, electric bills that spike in July and August disproportionately compared to prior years, with no change in setpoint or occupancy. Third, visible dust accumulation at supply registers, which can indicate air pulling through a gap in an attic or crawlspace run and carrying particulate matter with it. Fourth, a musty smell from supply registers in humid months, which suggests return-side leaks are pulling unconditioned attic or crawlspace air into the system. A camera inspection documents all of these conditions before a price is written.

What CleanRun Documents on Every Duct Repair Job

Documentation is not a marketing concept at CleanRun – it’s the actual deliverable. Tomas Reyes built the company’s process around it in 2013 because the alternative – telling a homeowner the work is done without showing them – is not verifiable. Every duct repair job produces a written scope before work starts, photographs of each duct run before and after the repair, and a written record of what was found, what was done, and what materials were used. That record is delivered to the homeowner as a standard part of every job, not on request.

The 365-Day Done Right Promise is written into that record. If a sealed joint fails or a repair doesn’t hold within 365 days, CleanRun returns and makes it right. There’s no call-center interpretation of that promise – it’s written down, and it applies to every job Tomas Reyes’s team completes in Atlanta.

The equipment used on duct repair jobs – Rotobrush for duct system access and agitation, Nikro negative-pressure systems, Abatement Technologies equipment where air quality work overlaps – is named in the job record. A homeowner can look up those brands independently and verify what they’re getting before agreeing to a price. That’s not a differentiator we invented; it’s the minimum standard a documented process requires.

For homeowners who want to understand how duct repair fits into the broader picture of what CleanRun does, the home page covers every service and explains the Haven Standard in full.

Key Takeaways

• Duct repair and sealing in Atlanta costs $350-$1,100 for most single-family homes; Aeroseal whole-home sealing runs $1,400-$2,800 for larger properties.
• Single disconnected or breached duct runs typically cost $95-$220 to repair – the most common repair call CleanRun receives in Atlanta neighborhoods with original flex duct systems.
• Atlanta’s 140°F summer attic temperatures accelerate duct liner failure faster than in cooler markets; flex duct installed before 2005 deserves a camera inspection before the next cooling season.
• Return-side duct leaks pull hot, humid attic air into the system – the cause of a disproportionate share of high summer electric bills in homes across East Atlanta, Decatur, and Smyrna.
• Mastic sealant is code-compliant and lasts 20-30 years; aluminum tape is not code-compliant for permanent duct sealing under Georgia’s mechanical code and fails at temperature extremes.
• Every CleanRun job is priced in writing before work starts (Haven Standard Clause 1), photographed before and after, and covered by the 365-Day Done Right Promise.
• A free second opinion on any written competitor estimate is available – CleanRun puts its number next to theirs in writing, no obligation.

Get a Written Estimate for Duct Repair & Sealing in Atlanta

If your home has rooms that won’t cool, bills that don’t make sense, or a duct system that hasn’t been looked at since installation, a camera inspection is the right starting point – not a guess. CleanRun serves Atlanta and the surrounding metro, from Decatur and Kirkwood to Sandy Springs, Smyrna, and Johns Creek. Every estimate is written before work starts. Every job is photographed before and after. Every repair is backed by the 365-Day Done Right Promise.

Call (470) 495-9370 to schedule a free estimate. A live person answers – not an answering service, not a callback queue. Tomas Reyes’s team will write your price before a single panel comes off.

Pricing reflects the Atlanta market as of 2026. CleanRun Air Duct Cleaning Atlanta offers free estimates – call (470) 495-9370.

Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Atlanta, serving Atlanta homeowners since 2013.