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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Before
AfterTrusted Duct Repair & Sealing for Atlanta Homeowners
Duct repair and sealing in Atlanta typically costs $350-$1,800 depending on whether you’re sealing accessible joints or replacing collapsed flex runs in a crawlspace. Most jobs we complete in a single visit, with a written price delivered before any work begins and a documented photo record of every repair. Call (470) 495-9370 for a free estimate with no obligation.
We’ve been working inside Atlanta homes since 2013, and the pattern is consistent: the ductwork hidden behind drywall and in crawlspaces is where conditioned air disappears before it ever reaches a register (the vent cover where air enters your room). In neighborhoods like Virginia-Highland, Grant Park, and Kirkwood, we’ve found original flex duct from the 1980s and 1990s that’s brittle, disconnected, or actively leaking 20-30% of heated and cooled air into attics and basements. That’s not inefficiency; it’s money leaving your house through a hole you can’t see.
CleanRun Air Duct Cleaning Atlanta operates under the H.A.V.E.N. Standard, which means every technician is background-checked, uniformed, and identified by name before arrival. We don’t do estimates over the phone that change when the truck pulls up. Haven Standard Clause 1 requires a written price before any work starts, every time, with no exceptions. Since our first job in 2013, we’ve served more than 52,000 homes, and every one received a documented photo record of the work performed.
What Our Duct Repair & Sealing Service Includes
Duct Sealing
Duct sealing closes the gaps, joints, and seams in your supply and return ductwork where conditioned air escapes into unconditioned spaces. In Atlanta’s climate, where summer attic temperatures regularly exceed 130°F, every cubic foot of cooled air lost to a leaky joint is air your compressor worked to create. We use mastic sealant (a thick, fiber-reinforced paste that remains flexible after curing) and metal-backed tape rated for HVAC applications, applied after the duct surface is cleaned and prepped. Our crews photograph every sealed joint before and after, and those images are included in your job record.
Flex Duct Repair
Flex duct, the insulated flexible tubing common in Atlanta homes built after 1980, collapses, tears, or disconnects at the collar where it meets the plenum (the central distribution box attached to your air handler). In Smyrna, Decatur, and East Atlanta, we’ve replaced dozens of flex runs that squirrels or roof rats have chewed through in attics. When repair is possible, we splice in new sections using mechanical fasteners and seal with mastic; when replacement is necessary, we match the R-value of the existing insulation and photograph the full run from collar to register boot.
Metal Duct Repair
Older homes in Inman Park, Candler Park, Ansley Park, and Mableton often have galvanized steel ductwork that corrodes at seams or develops pinholes from condensation. Metal duct repair involves cutting out damaged sections, fabricating replacement pieces from matching gauge steel, and sealing with mastic and drive cleats (mechanical fasteners that join duct sections without relying solely on tape). We also address the underlying cause, whether it’s poor insulation causing sweat or negative pressure that’s pulling humid attic air into the system.
Duct Insulation
Uninsulated or poorly insulated ductwork in an Atlanta attic loses significant thermal energy through the duct wall itself. We install fiberglass duct wrap or replace damaged insulation on existing runs, paying particular attention to the plenum and the first few feet of each duct run where temperature differentials are greatest. In North Atlanta homes with ductwork in vented crawlspaces, we’ve seen condensation so severe it saturated ceiling drywall below; proper insulation with a vapor barrier prevents this.
Mastic Sealant Application
Mastic is the professional standard for sealing duct joints because it fills irregular gaps and remains flexible through decades of thermal cycling. Unlike foil tape, which can fail when oil-laden dust compromises the adhesive, mastic bonds to the metal or flex duct substrate and creates a permanent seal. We apply mastic with a brush or sprayer to all longitudinal seams, transverse joints, and register boots, then allow proper cure time before pressurizing the system. The result is tested with a duct blaster or measured through static pressure comparison.
Air Leak Repair
Air leaks in ductwork often occur at the return side, where negative pressure (suction) pulls unfiltered attic or crawlspace air directly into your HVAC system. This bypasses your filter and introduces fiberglass particles, rodent waste, and humidity into the air you breathe. We pressurize the system to identify leak points, repair with appropriate materials, and verify with a second pressure test. In Sandy Springs and Dunwoody, we’ve found return leaks so severe they were pulling enough attic air to coat the evaporator coil with dust in a single season.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for Duct Repair & Sealing
Our crews work with the equipment and components that make up your complete HVAC and air distribution system. We’ve installed and repaired duct connections to hundreds of Honeywell air cleaners and whole-house dehumidifiers, integrating the ductwork modifications needed to accommodate these add-ons without compromising system static pressure. Our inventory includes Honeywell-compatible transition fittings and collars, so repairs don’t wait on parts.
We’ve also serviced Aprilaire humidifiers and ventilators in Atlanta homes for over a decade, repairing the duct branches that feed these units and ensuring proper damper operation so conditioned air flows where it’s designed to. Whether your system includes Aprilaire, Honeywell, or any other make of air handler, heat pump, or ancillary equipment, we fabricate repairs that match the original specifications. Our equipment roster includes Nikro and Abatement Technologies negative-pressure machines used to protect your home during duct modification work.
BeforeAfterSigns You Need Duct Repair & Sealing Right Now
- Rooms that never reach the thermostat set point. If your master bedroom stays five degrees warmer than the hallway in summer, the duct run serving that room is likely leaking, disconnected, or crushed. We see this constantly in Atlanta’s older ranch homes where flex duct has been stepped on in the attic during maintenance visits.
- Dust accumulation immediately after professional cleaning. A home that was dust-free for months after our air duct cleaning service suddenly shows gray film on surfaces within weeks. This often means a return duct leak is pulling attic air through fiberglass insulation and distributing it through your supply registers.
- Unusually high summer electric bills with no rate change. Atlanta’s cooling season runs May through September, and a 20% duct leakage can increase your compressor runtime by proportional amounts. If your kilowatt-hour usage jumped without a corresponding temperature spike, the air is going somewhere other than your rooms.
- Musty or chemical odors when the system runs. Flex duct with a compromised vapor barrier allows attic humidity to reach the inner liner, creating mold conditions. In crawlspace homes throughout College Park and Mableton, we’ve found flex duct literally dripping condensation into the insulation below.
- Visible duct damage during routine maintenance. If your HVAC technician has mentioned “a few disconnected runs” or you can see torn flex duct during a filter change, the damage is almost certainly worse in areas you can’t access. We photograph everything so you see what we see.
Our Duct Repair & Sealing Process - Step by Step
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System inspection and pressure testing. We start with a visual assessment of accessible ductwork and measure static pressure at the air handler to establish baseline performance. Abnormal readings tell us where to look first.
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Photographic documentation of all accessible runs. Before touching anything, we photograph every duct run, joint, and register boot we can reach. These become the “before” images in your documented photo record.
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Written scope and price delivered before work begins. Haven Standard Clause 1: you receive a written price for the exact work proposed, with line items for materials and labor. No per-vent pricing, no open-ended hourly rates, no surprises.
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Repair execution with trade-standard materials. We use mastic sealant, mechanical fasteners, and replacement duct sections that match or exceed original specifications. Equipment from Nikro and Abatement Technologies maintains negative pressure in the work zone to protect your home.
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Post-repair verification and photo record delivery. We re-test static pressure, operate the system through a complete cycle, and photograph the completed work. Your job record includes all images, the written scope, and the 365-Day Done Right Promise.
How Much Does Duct Repair & Sealing Cost in Atlanta?
Duct sealing for accessible joints and seams in a typical Atlanta home runs $350-$650. Flex duct repair or replacement of individual runs costs $200-$500 per run depending on length and attic accessibility. Metal duct repair involving fabrication and custom fitting ranges $450-$1,200. Comprehensive sealing of an entire duct system with a duct blaster verification test typically falls between $800-$1,800.
Several factors move the price within these ranges. Attic access is the biggest variable; a walk-up attic with decking allows faster, safer work than a 24-inch crawlspace in a 1960s Decatur bungalow. The extent of damage matters too: sealing six joints is straightforward, while replacing a collapsed return trunk requires more material and time. We also factor in whether the repair requires temporary disconnection of the air handler or if work can proceed with the system idle.
The most reliable way to avoid overpaying is to get a written scope that specifies exactly what will be repaired, with what materials, and what verification method will confirm the result. Beware of per-vent pricing, which incentivizes unnecessary work, or quotes that don’t include a post-repair test. Our estimates are free, and we offer a Free Second Opinion on any competitor’s written estimate; bring us their scope and we’ll put our number next to it in writing.
Every CleanRun price includes the documented photo record, materials, labor, and the 365-Day Done Right Promise. Call (470) 495-9370 for an exact quote on your specific system.
Duct Repair & Sealing Near Atlanta - Our Service Area
We repair and seal ductwork throughout the metro Atlanta core and inner suburbs, including Duct Repair & Sealing in Decatur, Duct Repair & Sealing in North Atlanta, Smyrna, College Park, Mableton, Sandy Springs, Dunwoody, Marietta, Douglasville, Powder Springs, and Norcross. Most appointments are scheduled within a few business days, with written confirmation of your arrival window. For homes in the I-285 perimeter, we typically arrive within the confirmed window; outer-ring suburbs may see slightly longer scheduling depending on current job volume.
Serving Atlanta, GA - Our Local Coverage Area
We’re based in the Atlanta area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Duct Repair & Sealing in Atlanta
Duct repair and sealing fixes the physical pathways that carry heated and cooled air from your air handler to your rooms, closing leaks, reconnecting separated sections, and replacing damaged materials. The goal is to deliver the air your system produces to the registers (vent covers) where you actually want it, rather than losing it to attics, crawlspaces, or wall cavities. CleanRun provides a written price before any work starts and photographs every repair for your records.
Most residential jobs in Atlanta are completed in 2-4 hours, with larger homes or extensive crawlspace work extending to a full day. We schedule based on the written scope, not an optimistic guess, and we don’t leave until the post-repair verification is complete. You’ll know the expected duration before we start; Haven Standard Clause 1 requires it in writing.
Typical residential duct sealing runs $350-$650, individual flex duct repairs $200-$500 per run, and whole-system sealing with verification $800-$1,800. The exact price depends on accessibility, extent of damage, and materials required. We deliver a written, itemized price before any work begins, and estimates are always free. Call (470) 495-9370 for your specific quote.
Yes. We regularly repair duct connections to Honeywell air cleaners, Aprilaire humidifiers and ventilators, and all standard HVAC equipment brands. Our crews carry transition fittings and hardware for common configurations, and we fabricate custom solutions when needed. The brand of your air handler or accessory doesn’t affect our ability to repair the ductwork that serves it.
We prioritize calls involving complete system failure or conditions that risk equipment damage, such as a disconnected return pulling unfiltered air directly through the air handler. All calls are answered by a live person who can assess urgency and schedule accordingly. For non-urgent repairs, we typically schedule within a few business days with a confirmed arrival window.
Every job is backed by the 365-Day Done Right Promise: if the repair fails or the leak returns within one year, we return and make it right at no charge. This is a written guarantee included in your job record, not a policy subject to manager approval. Haven Standard Clause 5 governs all warranty claims.
Clear a path to your air handler, attic access, and crawlspace entry if applicable. Secure pets in a separate area, as our crews move between interior and exterior frequently. You don’t need to move furniture or cover belongings; our negative-pressure equipment and containment protocols protect your space. We’ll confirm any specific preparation needs when we schedule your appointment. Call (470) 495-9370 to arrange your free estimate.
Schedule Your Duct Repair & Sealing Service in Atlanta Today
Call (470) 495-9370 to speak with a live person and schedule your free estimate. You’ll receive a written price before any work begins, a documented photo record of every repair, and the 365-Day Done Right Promise in writing. No per-vent pricing, no bait-and-switch, no exceptions.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Atlanta, serving Atlanta homeowners since 2013.