Duct Repair & Sealing in Marietta - Leakage Measured, Then Priced in Writing

Fast, Reliable Duct Repair & Sealing Across Marietta

Most duct repair and sealing jobs in Marietta run $280-$720 for a whole-system fix, and we deliver a written price before any panel comes off. Crews dispatch from our Atlanta office and serve Marietta neighborhoods directly - no third-party subcontractors, no van with out-of-state plates.

Call (470) 516-9337

We’ve worked on enough Marietta homes to know the local pattern: the 1970s-1990s ranch and colonial stock along the US-41 corridor and near Franklin Road carries original fiberglass duct board plenums that have cycled between 130°F attic heat and 55°F conditioned air for decades. That thermal stress causes interior liner separation, not just dirt accumulation. Our Duct Repair & Sealing crew addresses both the structural failure and the leakage it creates - documented with before-and-after photos of every duct run, included as standard on every job since we started in 2013.

Call (470) 516-9337 for a written estimate. Estimates are free, and we put our number next to any competitor’s written quote under our Free Second Opinion policy.

Why CleanRun Air Duct Cleaning Marietta Is Marietta’s Preferred Duct Repair & Sealing Company

CleanRun is independently owned and operated under the Haven Standard, not a franchise network. Tomas Reyes built the company in 2013 on a single rule: every customer gets a written price before work starts and a photo record when the crew leaves. We’ve now served more than 52,000 homes with that same protocol.

Marietta homeowners find us because they’ve already experienced the alternative - a low coupon price that ballooned once the truck arrived, or a “cleaning” that left fiberglass particles blowing from registers. Our reviews in Cobb County consistently cite the same detail: the technician showed the camera footage first, explained what was actually wrong, and the invoice matched the written estimate. Haven Standard Clause 1: Written Price Before Any Work Starts. No exceptions.

Response time to Marietta is same-day or next-day for standard scheduling. Emergency calls for active air leakage or blower motor strain from collapsed flex duct get priority dispatch. All technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews.

We know the local housing stock because we’ve documented it. The delaminated duct board we find in Marietta’s 1980s ranches, the pollen-caked flex duct in homes near Kennesaw Mountain’s tree line, the disconnected trunk lines in split-levels off Roswell Road - it’s all in our photo archives. That local pattern recognition means faster diagnosis and repair that actually lasts.

Our Duct Repair & Sealing Services in Marietta

Duct Sealing

Leaky ducts in Marietta’s unconditioned attics waste 20-30% of conditioned air before it reaches the rooms below. We seal metal duct joints with mastic sealant, not foil tape that fails after two summers of 140°F heat cycling. For flex duct connections, we use mechanical collars and sealant rated for the temperature swings Georgia attics produce. Every sealed joint is pressure-tested and photographed. A typical whole-system duct sealing in Marietta runs $340-$580.

Flex Duct Repair

Flex duct in Marietta’s older homes has often been crushed by storage items in attics or degraded by UV exposure where it passes near roof vents. We replace damaged sections with new insulated flex duct, properly supported to prevent sagging that traps condensation in Marietta’s humid climate. Single-run repairs run $180-$320; multiple runs or full trunk replacement runs $420-$680.

Metal Duct Repair

Galvanized metal ducts in Marietta’s 1960s-1970s stock rust at seams where condensation collects, especially in homes with oversized AC units that short-cycle. We cut out corroded sections, fabricate replacements, and seal with mastic reinforced with fiberglass mesh. Metal repair is more durable than patching with tape, and it handles the thermal expansion that kills adhesive bonds in Georgia attics.

Duct Insulation

Uninsulated or degraded duct insulation in Marietta attics means 55°F conditioned air travels through a 130°F environment. We install new foil-faced fiberglass insulation or closed-cell foam wrap, depending on access and duct type. Proper insulation pays for itself fastest in Marietta’s climate, where cooling dominates the utility bill eight months a year. Whole-system re-insulation typically runs $480-$820.

Mastic Sealant Application

Mastic is the only sealing method we use on metal joints in Marietta. Brush-applied mastic remains flexible across temperature extremes and creates a mechanical bond that tape cannot match. We apply it to every accessible joint, then verify with a smoke pencil or pressure differential test. This is standard on every sealing job - not an upsell.

Air Leak Repair

Disconnected ducts in Marietta’s crawl spaces and attics often go undetected because the air still moves - it just moves into the wrong space. We pressurize the system, locate leaks with a smoke test or thermal camera, and repair with proper mechanical connections and sealant. A single disconnected return in a Marietta crawl space can pull fiberglass, mold spores, and soil gas into the living space.

Before

After

Trusted Brands We Service in Marietta

Our equipment roster includes Rotobrush rotary systems for low-abrasion agitation, Nikro negative-pressure extractors, and Guardsman mesh reinforcement for mastic applications on degraded duct board. We also stock Abatement Technologies HEPA filtration for containment during repair work in occupied homes. These are professional-grade tools that customers can verify independently - we name them because the work should be inspectable, not mysterious. Parts and materials are stocked locally for Marietta jobs, so most repairs complete in a single visit without waiting on shipped components.

Common Duct Repair & Sealing Problems We See in Marietta Homes

• Duct board liner delamination in 1970s-1990s homes. The original fiberglass duct board plenums in Marietta’s ranch and colonial stock have cycled between extreme attic heat and conditioned air for 30-50 years. Interior liner separation releases fiberglass particles into the airstream - a condition our camera inspection identifies before any agitation tool touches the surface.
• Failed foil tape on metal duct joints. Standard foil tape adhesive degrades within 18-24 months in Marietta attics that regularly exceed 130°F. We remove failed tape and seal with mastic, which remains bonded across the full temperature range.
• Collapsed or sagging flex duct in unconditioned attics. Marietta’s humidity causes flex duct insulation to absorb moisture and sag, creating low spots where condensation pools and mold establishes. We replace and properly support new flex duct to maintain positive slope for drainage.
• Disconnected returns in crawl spaces pulling contaminated air. In Marietta’s older homes with crawl space returns, duct separation draws air through fiberglass insulation, soil, and pest debris. We repair the connection and seal the return box to prevent negative-pressure infiltration.

Pricing for Duct Repair & Sealing in Marietta, GA

We Also Serve Cities Near Marietta

Our crews work throughout Cobb and surrounding counties, including Marietta, Smyrna, Kennesaw, Atlanta, and Woodstock. Scheduling and dispatch are coordinated from our Atlanta office; technicians serve each city locally without cross-metro delays.

The Marietta Difference: What Rural Properties and Aged Systems Actually Need

Marietta sits inside one of the worst seasonal pollen corridors in the United States. The Atlanta metro’s dense canopy of mature loblolly pines and oaks deposits extraordinary airborne loads each spring and fall, and Marietta’s high year-round humidity causes that pollen and mold spores to cake onto duct surfaces faster than in drier metros. For rural properties near unpaved roads and open land - common in the areas west of US-41 and north toward Kennesaw - the loading is worse: dust from road traffic, agricultural particulate, and wood smoke from supplemental heating all increase the contamination rate inside ductwork.

Wood heat changes the calculus. Homes that burn wood even partially through winter introduce fine particulate that standard fiberglass filters don’t capture. That particulate accumulates in duct board pores and on flex duct interior surfaces, creating a substrate for moisture retention in Marietta’s humid climate. Realistic cleaning and repair intervals for these properties: every 2-3 years, not the 5-7 year standard for all-electric homes on paved roads. Outbuilding systems - workshops, guest houses, pool equipment rooms with ducted heating or cooling - often go longer between services and require more extensive repair when finally addressed.

We responded to a call in the Franklin Road area where a homeowner complained of fiberglass particles on registers after a recent cleaning; our camera inspection revealed delaminated duct board in the original plenum. Using mastic sealant and Guardsman mesh, we sealed the failing liner and applied duct insulation to the trunk line, restoring safe airflow without accelerating deterioration.

The local failure modes we refuse to replicate: over-aggressive brushing on 30+ year-old duct board that releases fiberglass; sealing only accessible flex duct while ignoring disconnected plenums in unconditioned attics; using foil tape on metal joints that will fail the next summer; neglecting to verify blower motor static pressure after sealing, which can reduce airflow and overheat older equipment in Marietta’s ranch homes.

FAQs - Duct Repair & Sealing in Marietta