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
AfterFast, Reliable Duct Repair & Sealing Across Arlington
Duct repair and sealing in Arlington, VA typically costs $280-$650 for most single-family homes, with condo and apartment work in the Rosslyn-Ballston corridor running $180-$420 depending on system access and whether property management coordination is needed. We’re usually on-site in Arlington within one to two business days, scheduling from our Washington, DC office where dispatch coordinates crews serving Arlington neighborhoods directly. Whether you own a 1940s Cape Cod in Cherrydale with original retrofit ductwork or a high-rise unit near National Landing with a shared air handler, we bring equipment sized for the job and a written price before any panel comes off.
Call (240) 255-4519 for a free written estimate. Every Arlington job includes our Documented Photo Record and the 365-Day Done Right Promise, backed in writing under the H.A.V.E.N. Standard.
Why CleanRun Air Duct Cleaning Rockville Is Arlington’s Preferred Duct Repair & Sealing Company
We’ve served Arlington homeowners since our founding in 2013, and the patterns here are distinct from Fairfax County or Montgomery County jobs. Our crews know the parking restrictions along Wilson Boulevard, the loading-dock protocols at Crystal City condos, and the basement access challenges in Dominion Hills homes where a 1950s renovation buried the original trunk lines behind finished drywall. That local fluency matters. A technician who treats Arlington like Anywhere Suburb USA will miss the octopus-furnace retrofit legacy that defines so much of this housing stock.
Our reputation in Arlington is built on what we document, not what we claim. Every job delivers a written scope and price before work starts - Haven Standard Clause 1 - and concludes with before-and-after photos of every duct run we touch. Homeowners in Ashton Heights and Bluemont have used those photo records to verify completed work and to settle disputes with landlords or property managers. The 365-Day Done Right Promise means if a sealed joint fails or a repair doesn’t hold, we return and make it right. No manager approval needed. It’s in writing on every invoice.
Tomas Reyes, who leads CleanRun, set this standard from the first job in 2013: background-checked, uniformed technicians identified by name before arrival, professional-grade equipment from brands customers can verify independently, and zero tolerance for the $79 coupon bait-and-switch that dominates this industry. Arlington homeowners research before they call. We built our process for exactly that customer.
Our Duct Repair & Sealing Services in Arlington
Metal Duct Repair
Arlington’s WWII-era and 1950s housing stock - the Cape Cods and colonials of Cherrydale, Dominion Hills, and Ashton Heights - largely runs on original galvanized sheet-metal ductwork that has never been professionally addressed. Decades of thermal cycling between humid summers and dry winters have loosened seams, cracked solder joints, and pulled connections at the plenum (the main distribution box where heated or cooled air first enters the duct system). We repair metal ductwork using mechanical fastening and mastic sealant rated for the temperature swings this climate produces. In homes where the original octopus-furnace trunk lines were retrofitted with forced-air handlers, we use flexible shaft agitation tools to reach cavities that standard rotary brushes cannot navigate - a necessity our crews learned from repeated Arlington jobs, not from suburban training manuals.
Mastic Sealant Application
Brush-on mastic is the only sealant we use on Arlington’s aging metal ductwork. Tape fails within a season here. The thermal expansion and contraction cycles - pronounced in Arlington’s climate with 70%+ summer humidity followed by dry winter heating - crack adhesive-backed products and pull them away from irregular surfaces. We apply fiber-reinforced mastic to every accessible joint, seam, and penetration, with extra dwell time on the oversized, irregular trunk lines left from octopus-furnace retrofits. The result is a flexible, permanent seal that moves with the metal. Every mastic application is photographed before and after, included in your standard job record.
Flex Duct Repair
Flex duct - the insulated flexible tubing common in attic runs and later additions - degrades faster in Arlington’s humid summers. The plastic inner liner becomes brittle, the insulation compacts, and the wire helix corrodes at stress points. We replace damaged flex duct with new R-8 insulated runs, sized to the original Manual D airflow calculations where possible, and seal all connections with mastic and mechanical supports. In Ballston and Clarendon condos, flex duct repair often requires coordination with building engineers because the runs pass through shared chases. Our Washington, DC dispatch office handles that scheduling directly.
Duct Insulation
Condensation on uninsulated or poorly insulated ductwork is a recurring problem in Arlington’s older homes, particularly in basement and crawl space runs where humid summer air meets cool supply surfaces. We install closed-cell foam or foil-faced fiberglass insulation on exposed metal ducts, sealed at all seams to prevent moisture infiltration. In Cherrydale and Dominion Hills, where basement headroom is often limited and original ductwork hangs low, we select insulation thickness that fits the available clearance without reducing airflow.
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.
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AfterTrusted Brands We Service in Arlington
CleanRun technicians carry professional-grade equipment from Honeywell, Aprilaire, and Abatement Technologies - brands with published specifications customers can verify before agreeing to any scope. Our Arlington crews stock Honeywell zone dampers and Aprilaire media air cleaners for common retrofit applications, and we maintain Abatement Technologies negative-pressure extraction units sized for both single-family homes and high-rise shared systems. We don’t perform with shop-vacs and hope you don’t know the difference. Every piece of equipment on your job is named in the written scope, and every technician can explain why it was selected for your specific duct configuration.
Common Duct Repair & Sealing Problems We See in Arlington Homes
- Leaky octopus-furnace trunk lines behind finished ceilings. In Cherrydale and Dominion Hills, the original gravity warm-air systems were retrofitted with forced-air handlers in the 1960s and 70s, leaving oversized, irregular trunk lines that are now buried behind basement drywall. Sealing only the accessible flex duct runs while missing these original lines is a common oversight that leaves the source problem untouched.
- Standard rotary brushes failing in narrow retrofit cavities. The tight turns and irregular dimensions of converted octopus-furnace systems defeat standard rotary brush equipment. We’ve found source removal incomplete in homes where previous technicians didn’t carry flexible shaft tools or didn’t allow the extra dwell time these cavities require.
- Thermal cycling damage to mastic and seams. Arlington’s humid subtropical climate produces repeated expansion and contraction in aging sheet-metal connections. Mastic applied without accounting for this movement cracks within a season, pulling leaks open wider than before. We use fiber-reinforced products and application techniques specifically for this climate stress.
- Shared-system constraints in Ballston and Crystal City high-rises. Condo and apartment towers along the Rosslyn-Ballston corridor and in National Landing have centralized air handlers with long horizontal duct runs. Repair and sealing work requires property management coordination, scheduled shutdown windows, and equipment that won’t trigger building fire suppression systems. Our crews have completed dozens of these jobs and understand the protocol.
Pricing for Duct Repair & Sealing in Arlington, VA
Most single-family duct sealing jobs in Arlington run $280-$650, with the lower end covering accessible basement trunk lines in homes with unfinished utility space and the upper end reflecting finished-ceiling access work or octopus-furnace retrofit systems requiring flexible shaft tools and extended labor. Condo and apartment sealing in the Rosslyn-Ballston corridor typically falls between $180-$420, depending on whether building coordination is required and how many individual runs serve the unit.
Metal duct repair - section replacement, seam rebuilding, plenum reconnection - ranges $340-$780 in Arlington’s market. Flex duct replacement runs $95-$180 per run, with most homes needing two to four runs. Duct insulation is quoted by linear foot, generally $12-$18 per foot of exposed metal in basements and crawl spaces.
What moves the price: accessibility (finished vs. unfinished basement), the age and condition of original ductwork, whether octopus-furnace retrofits create extra labor, and whether condo building protocols require after-hours scheduling. We deliver one flat price per system, agreed in writing before any work starts. No per-vent pricing. No add-ons once the truck is in your driveway. Call (240) 255-4519 for your exact quote - estimates are free, and we provide a Free Second Opinion on any competitor’s written estimate under Haven Standard Clause 5.
We Also Serve Cities Near Arlington
Our Duct Repair & Sealing crews work throughout Northern Virginia, including Arlington and neighboring Alexandria, Fairfax, Reston, and Herndon. Each city’s housing stock presents different duct configurations and failure modes, and we adjust equipment and approach accordingly rather than applying a single template.
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 musty smell is almost always mold or microbial growth on debris inside leaky ductwork, accelerated by Arlington’s 70%+ summer humidity entering through unsealed joints and pulling into the airstream. Sealing the leaks stops the humid air infiltration, and source removal of the existing buildup eliminates the odor source. In Cherrydale and Dominion Hills, we regularly find this problem concentrated at octopus-furnace retrofit seams that have never been sealed. Call (240) 255-4519 for a written estimate - we’ll photograph the condition and show you before proposing any scope.
Yes, and this is specifically what we do differently from standard duct cleaning companies. Those oversized, irregular trunk lines require flexible shaft agitation tools and extended dwell time that rotary brushes cannot provide. We seal accessible joints with fiber-reinforced mastic rated for thermal cycling, and we photograph every sealed connection for your job record. In a 1942 Cape Cod on 25th Street North, we dropped static pressure from 0.82 to 0.48 inches after sealing retrofit seams that three previous companies had missed. The musty odor the homeowner reported every July was gone within 48 hours.
Your unit’s individual duct runs branch from a centralized air handler, so we seal only the runs serving your space without accessing the main building infrastructure. Our Washington, DC dispatch office coordinates directly with your property management to schedule within building maintenance windows and to comply with any fire-safety or access protocols. We carry equipment that meets high-rise insurance requirements, and we provide your building engineer with a scope summary before starting. Most Ballston condo sealing jobs complete in two to four hours.
Arlington’s humid subtropical climate - summer humidity regularly above 70%, pronounced seasonal temperature swings - creates thermal expansion and contraction that cracks inferior sealants within months. We use only fiber-reinforced mastic that flexes with the metal, and we apply it with extra attention to stress points where retrofit trunk lines meet newer forced-air components. Under the 365-Day Done Right Promise, if any sealed joint fails within a year, we return and reseal at no charge. That’s Haven Standard Clause 2, in writing on every invoice.
Yes, and this is a distinct service from HVAC duct sealing. In stacked buildings - common in Crystal City, Pentagon City, and along the Orange Line corridor - dryer vents share vertical shafts that require specific cleaning and sealing protocols to prevent lint accumulation and fire risk. We coordinate with building management for shaft access, inspect the full run with a camera, and seal any disconnected or leaking joints within the accessible portions. The work is photographed, and we provide documentation for your building’s maintenance records. Call (240) 255-4519 to discuss your building’s specific configuration.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Arlington since 2013.