Duct Repair & Sealing in Dunwoody - Tested First, Written Price Second

Fast, Reliable Duct Repair & Sealing Across Dunwoody

Most Dunwoody homes need more than a dryer vent cleaning. They need the failing ductwork found, photographed, and fixed. Our crews are dispatched from the Atlanta office and serve Dunwoody directly - call (470) 326-1926 for a written estimate before any work starts.

Call (470) 326-1926

We’ve been in Dunwoody attics since 2013. We know the 1970s ranch on Peeler Road, the split-level off Tilly Mill, the two-story colonial in Dunwoody Club Forest with flex duct stapled through 140°F July heat. The problems here are specific to this city’s housing stock and climate, and the fixes need to match.

Our Duct Repair & Sealing team documents every run before touching it. You see what we see. Then you get a written price. No exceptions.

Why CleanRun Air Duct Cleaning Johns Creek Is Dunwoody’s Preferred Duct Repair & Sealing Company

Dunwoody homeowners research before they call. We built our company for exactly that customer.

Since 2013, we’ve served 52,000+ homes with one rule: written price before work starts, every time. Haven Standard Clause 1. Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The license number is published on this page, not buried in a footer.

Every job concludes with a Documented Photo Record: inside every duct run, before and after, delivered to you as a standard deliverable. Not a courtesy. A deliverable. Our 365-Day Done Right Promise is backed in writing on every job - if it’s not right, we make it right.

We coordinate dispatch and scheduling from our Atlanta office, with crews serving Dunwoody locally. That means familiarity with DeKalb County permit requirements, Dunwoody’s specific subdivision layouts, and the failure patterns we see in this market’s 1970s-1980s housing stock.

Our Duct Repair & Sealing Services in Dunwoody

Duct Sealing

Leaky ducts steal 20-30% of conditioned air in a typical Dunwoody home. We seal every joint, boot, and plenum connection with mastic sealant - not tape, which fails in Georgia’s humidity cycles. In Dunwoody’s original fiberglass duct board systems, the seams between sections have often degraded to the point where the blower is pressurizing the attic instead of the bedrooms. We photograph the leakage, seal it, and verify with static pressure readings.

Flex Duct Repair

This is the repair we perform most often in Dunwoody. In Georgetown and Dunwoody Club Forest, long flex runs stapled through unconditioned attics delaminate when attic temperatures hit 140°F+ in July. The inner liner separates from the insulation, sags into partial collapse, and chokes airflow to back bedrooms. We pull the failed run under negative pressure, rebuild with insulated flex on proper saddles, and mastic-seal every connection. In Dunwoody Club Forest we opened up a two-story colonial whose second-floor flex run had been stapled through a 140°F+ July attic, and our camera inspection found the inner liner completely delaminated, sagging into a partial collapse that was choking airflow to the back bedrooms. We pulled the collapsed run under negative pressure, rebuilt it with insulated flex on proper saddles, and mastic-sealed every boot and plenum joint back to the air handler - the return static dropped immediately and the upstairs registers finally moved real air again.

Metal Duct Repair

Some Dunwoody homes, particularly earlier 1970s builds near the Dunwoody Village Parkway corridor, have galvanized metal trunk lines with rusted seams or disconnected take-offs. We repair or replace sections, seal with mastic, and insulate where the metal runs through unconditioned space. Metal duct doesn’t delaminate like flex, but it corrodes. We photograph the corrosion and show you exactly where the air is escaping.

Duct Insulation

Uninsulated or degraded duct insulation in Dunwoody attics creates condensation, mold risk, and thermal loss. We replace insulation on repaired runs using materials rated for Georgia’s humidity and temperature swings. This matters especially in Dunwoody’s older homes, where the original insulation has compressed or been disturbed by decades of service access.

Mastic Sealant Application

Mastic is the only sealant we use on Dunwoody jobs. It remains flexible through decades of thermal cycling, unlike tape which dries and separates. We brush-apply mastic to every joint, boot, and plenum connection, then photograph the sealed assembly before closing access. This is standard on every sealing job, not an upgrade.

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After

Trusted Brands We Service in Dunwoody

Our equipment roster includes Rotobrush, Nikro, and Abatement Technologies - professional-grade tools you can look up independently before agreeing to a price. We stock common flex duct diameters, mastic, and insulation materials for Dunwoody’s typical residential systems, which means most repairs don’t wait on parts. For specialized components, we source from Guardsman and other trade-recognized suppliers with next-day availability to the Atlanta metro.

Common Duct Repair & Sealing Problems We See in Dunwoody Homes

• Fiberglass duct board shedding fibers into living spaces. The 1970s-1980s fiberglass duct board systems still in most Dunwoody homes were designed with a roughly 20-year lifespan - meaning virtually every original run here is now 40-50 years old and shedding fibers into the living space, unlike the tight-flex, 2000s-era systems in the GA-400 corridor suburbs north of here. Our camera inspections regularly show degraded liner material accumulating at registers.
• Flex duct collapse in unconditioned attics. Long flex runs stapled through unconditioned attic space in Georgetown and Dunwoody Club Forest delaminate and partially collapse when attic temps hit 140°F+ in July. The restriction shows up as weak airflow to second-floor rooms and higher utility bills.
• Pollen and debris compaction against aging duct liner. Decades of oak, pine, and sweet gum pollen - metro Atlanta records some of the highest counts in the U.S. - compact against aging duct liner and restrict airflow at the registers. Six-plus months of continuous AC operation means these deposits build far faster than in drier climates.
• Disconnected or separated joints at plenum connections. Thermal cycling and vibration loosen connections between the air handler plenum and trunk lines, especially in systems that have never been professionally inspected. We find this in Dunwoody homes where the original installer used tape instead of mastic.

Pricing for Duct Repair & Sealing in Dunwoody, GA

We Also Serve Cities Near Dunwoody

Our crews work throughout northern metro Atlanta, including Duct Repair & Sealing in Dunwoody and surrounding communities: Johns Creek, Duluth, Alpharetta, and Norcross. Each market has distinct housing stock and failure patterns, and we adjust our approach accordingly.

FAQs - Duct Repair & Sealing in Dunwoody