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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AfterFast, Reliable Duct Repair & Sealing Across Arlington
Duct repair and sealing in Arlington, VA typically costs $280-$650 for most residential jobs, with garden apartment and condo work running toward the higher end due to access constraints. Our crews are dispatched from our Washington, DC office and carry the equipment to seal metal ductwork, repair flex duct, and verify results with camera inspection and pressure testing on the same visit. Arlington homeowners and property managers can reach us at (571) 526-0015 for a written estimate before any work begins.
We serve the full Arlington market, from the garden apartment corridors of Buckingham and Columbia Pike to the infill condos along the Rosslyn-Ballston corridor. The building stock here is unusually varied for a county this size, and that variation changes what duct repair looks like. A 1950s brick colonial in Lyon Park has different failure modes than a 2019 high-rise in Ballston, and both differ from the 1940s-era garden apartments where original duct chases run inside concrete-block walls. Our Duct Repair & Sealing team documents every run with before-and-after photography, so you see what was found and what was changed.
Why CleanRun Air Duct Cleaning Fairfax Is Arlington’s Preferred Duct Repair & Sealing Company
CleanRun has held the same practice since 2013: a written price before any work starts, a documented photo record of every duct run when the crew leaves, and the 365-Day Done Right Promise backed in writing on every job. In Arlington, that consistency matters because the building stock rewards technicians who verify their work rather than assume it.
Our reputation in Arlington is built on jobs where the customer could see the problem before agreeing to the fix. We’ve documented separated supply trunks in Buckingham garden apartments, construction dust infiltration in Rosslyn-Ballston condos, and shared dryer vent restrictions that were affecting whole vertical stacks. Each job record includes the photo set, the written scope, and the pressure test results. Customers in Arlington research before they call, and we built our process for that.
Scheduling is coordinated from our Washington, DC office, with crews carrying Rotobrush and Abatement Technologies equipment to Arlington addresses daily. Technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and they’re identified by name before arrival. Tomas Reyes, who leads CleanRun, established the documented-photo requirement as a non-negotiable deliverable from the company’s first job.
We also offer a Free Second Opinion on any written estimate from another contractor. Bring a competitor’s Arlington quote and CleanRun puts its own number next to it, in writing, with no obligation.
Our Duct Repair & Sealing Services in Arlington
Duct Sealing
Arlington’s 1940s-1960s housing stock, particularly the garden apartment complexes near Columbia Pike and in Buckingham, was built with galvanized sheet-metal supply and return ducts that have now had 60-80 years to separate at seams. In these buildings, the duct chases were built inside concrete-block walls, so the leaks are not visible from any finished space. Our duct sealing process starts with camera inspection to locate separation points, then applies mastic sealant (a fiber-reinforced compound that remains flexible after curing) to seams and joints that testing has confirmed as leaking. We follow with negative pressure testing to verify the seal before closing any access point. In Arlington’s humid subtropical climate, an unsealed return chase pulling attic air also pulls moisture, which compounds the biological load that high summer humidity already encourages.
Metal Duct Repair
Original sheet-metal ductwork in Arlington’s post-WWII brick colonials and garden apartments corrodes at seams and elbows where condensation collects. We cut access at strategic points, photograph the damage, repair or replace the affected section with matching gauge metal, and seal with mastic. The photo record goes to the customer as part of the standard job documentation. Metal duct repair in Arlington often requires working in tight mechanical closets or crawl spaces that were not designed for modern equipment, so our crews carry portable cutting and crimping tools sized for restricted access.
Flex Duct Repair
Flex duct, common in Arlington additions and retrofits from the 1980s forward, collapses at bends, separates at collars, or is punctured by rodents in crawl spaces. We replace damaged sections with new insulated flex duct, support it to prevent sagging, and seal connections with approved clamps and mastic. In Arlington’s older garden apartments, flex duct is sometimes found in later modifications where original metal was extended; we document the transition points photographically so the customer understands the full system layout.
Air Leak Repair
Air leak repair addresses the pressure boundary of the duct system itself, not just visible gaps. In Arlington’s tightly sealed modern condos along the Rosslyn-Ballston corridor, even small leaks in the duct envelope concentrate unfiltered air and construction particulates into living spaces. We pressurize the system, measure leakage at the air handler and each register location, then seal systematically. The post-repair pressure test provides a quantitative result that the pre-repair test can be compared against. This matters in Arlington’s newer buildings where HVAC systems are engineered for tight envelopes and any leak throws off the designed air balance.
Duct Insulation
Duct insulation in Arlington addresses both thermal loss and condensation control. In unconditioned attics and crawl spaces common in Lyon Park and similar neighborhoods, under-insulated metal ducts sweat in summer, promoting mold and corrosion. We install closed-cell insulation or replace degraded fiberglass wrap, with particular attention to Arlington’s high-humidity months when condensation risk peaks.
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.
BeforeAfterTrusted Brands We Service in Arlington
CleanRun crews carry professional-grade equipment from Rotobrush, Abatement Technologies, and Guardsman, with Nikro negative-pressure units for containment in multi-family settings. These are trade-recognized brands that Arlington customers can verify independently before agreeing to a scope of work. We stock common fittings, sealants, and repair materials so most Arlington jobs are completed in one visit without waiting for parts. For specialized components in older systems, such as custom gauge metal for 1940s-era Arlington ductwork, we fabricate on site or source from regional HVAC suppliers with next-day availability.
Common Duct Repair & Sealing Problems We See in Arlington Homes
- Separated supply trunks hidden in concrete-block chases. In Arlington’s garden apartment stock, particularly Buckingham and similar 1940s-1960s complexes, the original sheet-metal supply trunk separates at joints inside walls that were never designed for access. Camera inspection and negative pressure testing are required to find these leaks; reaching the register is not enough.
- Construction dust infiltration in infill buildings. The teardown-and-rebuild cycle along Arlington’s Rosslyn-Ballston and Columbia Pike corridors generates drywall dust and demolition particulates that enter duct systems of adjacent older homes and mid-rise buildings through shared walls, open soffits, and poorly sealed return pathways.
- Shared dryer vent stacks creating vertical lint blockages. In older Arlington low-rise communities, one unit’s restricted dryer vent can affect the whole stack. The trap catches only a fraction of lint; the inaccessible vertical section builds a fire hazard that duct sealing crews encounter when investigating airflow complaints.
- Mold colonization from seasonal humidity cycling. Arlington’s heavy spring pollen and high summer humidity create conditions where ducts that weren’t fully dried after AC startup develop biological growth. Sealing leaks that pull moist unconditioned air is preventive maintenance, not just an efficiency measure.
Pricing for Duct Repair & Sealing in Arlington, VA
Most residential duct sealing jobs in Arlington fall between $280 and $650. Metal duct repair with access cutting and section replacement typically runs $340-$780. Flex duct repair, when accessible, is usually $180-$420 per run. Air leak repair with full pressure testing and documented results ranges from $320-$720 depending on system size and access difficulty. Garden apartment and condo jobs in Arlington’s older stock trend toward the higher end of these ranges because of restricted access and the additional verification steps required.
What moves the number: the number of duct runs involved, whether access requires cutting into finished surfaces (with repair included), and whether the building’s original construction placed ducts inside concrete-block chases. Every CleanRun job in Arlington starts with a written price under Haven Standard Clause 1, delivered before any work begins. No per-vent pricing. No coupon that balloons on arrival. Call (571) 526-0015 for a free estimate with exact numbers for your building.
We Also Serve Cities Near Arlington
Our crews work throughout Northern Virginia, including Arlington, Alexandria, Fairfax, Reston, and Herndon. Scheduling and dispatch are coordinated from our Washington, DC office. The same written-price-first protocol and documented photo record apply in every service area.
Serving Arlington, VA - Our Local Coverage Area
We’re based in the Arlington area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Duct Repair & Sealing in Arlington
The original 1940s-1960s garden apartment design placed supply and return chases inside concrete-block walls, so technicians must work through small original access points rather than open a basement ceiling. That layout makes camera inspection and pressure testing essential for verification, and it adds time to every sealing step compared to a suburban single-family job with open crawl space or basement access. Call (571) 526-0015 for a written estimate that accounts for your building’s access constraints.
It is often both a sealing issue and a filtration issue. Infill construction generates particulates that enter through leaks in the duct envelope, particularly return pathways that pull from wall cavities or shared mechanical spaces. Sealing the duct pressure boundary stops the infiltration pathway; upgrading filtration and staging source removal with HEPA containment addresses what’s already inside. We document both the leak locations and the particulate load photographically. Call (571) 526-0015 for an assessment that includes pressure testing.
We can if the access point allows, but flex duct was not original to 1940s Arlington construction and its presence behind block usually indicates a later modification that may not meet current code. We camera-inspect to assess condition and routing, then provide a written scope that may include replacing with metal duct if the application requires it. Every option is priced in writing before work begins.
Shared dryer vent stacks in older low-rise communities create a lint pathway where one unit’s restriction affects the whole vertical run. The trap lint is only a fraction of what builds up in the inaccessible section. When we’re already investigating airflow problems in these buildings, the shared vent is a common contributing factor that residents attribute to the HVAC system. We document the vertical stack with camera inspection and include findings in the job record.
NADCA ACR 2021 sets the assessment, cleaning, and restoration standards for all duct work, with specific provisions for multi-family buildings regarding containment, negative-pressure isolation, and post-work verification. In Arlington high-rises and condos, we additionally follow the building’s mechanical access protocols and coordinate with property management for shared system shutdowns when required. Our crews carry Abatement Technologies HEPA containment equipment sized for these restrictions, and every job concludes with the documented photo record and pressure test results.
We were called to a Buckingham garden apartment where the second-floor bedroom registers barely moved air and the air handler was running hot. Using camera inspection, we found the original 1940s sheet-metal supply trunk had separated at a concrete-block chase, and the return chase was pulling attic air through a rusted seam. After mastic sealant and metal duct repair to the trunk, blower motor amp draw dropped and the registers held steady pressure under negative pressure testing. The customer received the full photo record, the written scope, and the pressure test comparison as standard deliverables.
Arlington’s aggressive teardown-and-rebuild cycle along corridors like Rosslyn-Ballston and Columbia Pike generates drywall dust and demolition particulates that infiltrate the duct systems of adjacent older homes and mid-century apartment buildings. At the same time, a large share of Arlington’s housing stock dates to the 1940s-1960s and retains original sheet-metal ductwork that has never been professionally cleaned. Arlington is a city where two distinct duct problems, new-construction contamination and decades of legacy buildup, often exist on the same block. Our process is built to identify which problem, or combination, your building has, and to document the findings before proposing any work.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Fairfax, serving Arlington since 2013.