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 Tysons Corner
Most new Tysons Corner condo owners don’t expect to call a duct company in year one. But in this market, you probably should. Duct repair and sealing in Tysons Corner typically runs $280-$680 for standard flex collar and plenum work on fan coil or VRF systems, and we can usually schedule within 48 hours. Call (240) 318-7712 for a written estimate before any work starts.
We’ve been working the Greensboro corridor, The Boro, and the Tysons Corner station developments since they started delivering units. Our crews know the mechanical closet layouts in these towers. We know which buildings used which flex duct specs. And we know that “new construction” in Tysons rarely means clean ductwork at move-in.
Dispatch and scheduling are coordinated from our Washington, DC office, but the crew that arrives at your Tysons Corner unit is local to Fairfax County and has already worked that same building or one just like it.
Why CleanRun Air Duct Cleaning Alexandria Is Tysons Corner’s Preferred Duct Repair & Sealing Company
CleanRun has held the Haven Standard since 2013. Every job gets a written price before work starts, every duct run is photographed before and after, and every repair is backed by our 365-Day Done Right Promise in writing. That’s Haven Standard Clause 1: Written Price Before Work Begins. No exceptions.
Tysons Corner customers specifically choose us because we understand their building stock. These aren’t single-family homes with basements and long trunk lines. They’re high-rise units with mechanical closets, short flex runs, and fan coil units that were packed with construction debris before the first owner closed. A technician who treats your unit like a Vienna colonial is going to miss the actual problem.
Our Duct Repair & Sealing team has documented photo records from hundreds of Tysons-area jobs, and those records are delivered to you as standard. You see what we found. You see what we did. No verbal reports, no trust-me claims.
Tomas Reyes leads CleanRun as owner and operator. He established the company’s documentation protocols in 2013 and still reviews photo records from Tysons Corner jobs personally.
Our Duct Repair & Sealing Services in Tysons Corner
Duct Sealing
Sealing in Tysons Corner usually means mastic application at plenum collars and flex duct connections in mechanical closets, not crawling through attics. The short VRF runs in towers like those along Westpark Drive or near the Greensboro Metro leak at the mechanical connections, not mid-run. We seal with mastic rated for the pressure class of your system, then pressure-test where accessible to confirm the seal holds. Typical cost: $280-$450 per mechanical closet.
Flex Duct Repair
Flex duct in Tysons Corner fails at the collar. In the 1970s-80s garden apartments on the periphery, decades of thermal cycling have hardened the flex and torn the wire helix at the plenum connection. In newer towers, the collar was never fully secured at CO and pulls loose under fan coil startup torque. We cut back to sound flex, install a proper draw-band collar, and seal with mastic. Typical cost: $340-$520 per run.
Metal Duct Repair
Older commercial-to-residential conversions near Route 7 and the I-495 interchange still have galvanized trunk sections with corroded seams or failed slip joints. We patch with matching gauge, seal with mastic, and insulate where the original wrap has degraded. These repairs are less common in Tysons proper but show up in the peripheral stock. Typical cost: $450-$680 per repair zone.
Duct Insulation
Condensation control is the driver here. DC-metro humidity, combined with Tysons Corner’s oversized cooling loads and the constant fresh-air intake from that same I-495/Route 7 interchange, means uninsulated or degraded flex runs sweat inside wall cavities. We replace degraded insulation with closed-cell sleeve or foil-faced wrap, sealed at all penetrations. Typical cost: $320-$580 per run depending on access.
Mastic Sealant Application
Mastic is the standard for Tysons work, not tape. Tape fails at the temperature swings near fan coil housings. We brush-apply UL-181-rated mastic at all joints, collars, and plenum connections, then allow full cure before restart. This is specified work under Haven Standard Clause 2: Documented Methods. The application is photographed before and after.
Air Leak Repair
Air leaks in Tysons Corner units show up as dust puffing from registers, humidity that won’t drop, or utility bills that seem high for a “new” building. The leak is usually a mechanical closet flex collar, an under-sealed plenum, or a missing end-cap on a capped branch. We locate with visual inspection and smoke pencil, repair with proper mechanical fastening and mastic, and verify with pressure differential where possible. Typical cost: $280-$520.
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 Tysons Corner
CleanRun stocks parts and uses equipment from Honeywell, Aprilaire, and Abatement Technologies on Tysons Corner jobs. Honeywell media filters and electronic air cleaners integrate with many of the fan coil units in local towers. Aprilaire humidistat and dehumidification controls address the persistent overcooling-and-humidity problems we see in high-rise construction. Abatement Technologies HEPA-negative-air machines contain particulate during repair work in occupied units with shared hallways and limited ventilation. We don’t spec equipment you can’t look up and verify yourself.
Common Duct Repair & Sealing Problems We See in Tysons Corner Homes
- Construction debris matting on fan coil fins at CO. The drywall dust and joint compound residue left by finishing trades in Tysons Corner’s post-2014 towers doesn’t stay in the ducts. It mats onto the coil fins, reducing heat transfer and forcing longer run times. Owners assume the unit is “new” so it must be clean. It isn’t.
- Loose flex duct collars in mechanical closets. The short flex connections on VRF and fan coil systems weren’t secured with proper draw bands at installation. Under startup torque, the collar pulls loose and leaks conditioned air into the wall cavity. In Tysons Corner’s humidity, that leak condenses and feeds mold before anyone smells it.
- Collapsed flex runs in 1970s-80s garden apartments. The periphery of Tysons still has aging stock with original flex duct that has hardened and torn at the wire helix after forty years of cycling. The I-495/Route 7 interchange loads these older air handlers with exhaust particulate, accelerating the degradation.
- Unsealed plenum connections on new construction. Building management in newer towers often has no duct maintenance protocol because the building is “new.” But the plenum-to-fan-coil connection was never mastic-sealed at CO. The leak is there from day one, wasting energy and spreading construction dust on every cycle.
Pricing for Duct Repair & Sealing in Tysons Corner, VA
We publish ranges because Haven Standard Clause 1 requires a written price before work starts, and that price should not surprise you.
| Service | Typical Range in Tysons Corner |
|---|---|
| Duct sealing, mechanical closet (mastic, collars) | $280-$450 |
| Flex duct repair, per run | $340-$520 |
| Metal duct repair, per zone | $450-$680 |
| Duct insulation replacement, per run | $320-$580 |
| Air leak diagnosis and repair | $280-$520 |
| Mastic sealant application, full mechanical closet | $300-$480 |
What moves you within these ranges: access difficulty (some Tysons towers have tight mechanical closets with no service platform), material grade required by your building’s mechanical spec, and whether the repair requires containment for occupied-unit work. We do not price per vent. One flat price per system, agreed in writing, before any panel comes off.
Bring us a competitor’s written estimate. Under Haven Standard Clause 5, we provide a Free Second Opinion at no cost, with our number next to theirs in writing.
We Also Serve Cities Near Tysons Corner
Our crews work Duct Repair & Sealing in Tysons Corner and surrounding Fairfax County and inner-Northern Virginia markets including Alexandria, Arlington, Springfield, and Falls Church. Each city gets the same written-price, photo-documented standard, but the work itself differs based on local housing stock. Tysons Corner’s high-rise fan coil units are not the same problem set as Arlington’s garden apartments or Alexandria’s historic conversions, and our scope reflects that.
Serving Tysons Corner, VA - Our Local Coverage Area
We’re based in the Tysons Corner 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 Tysons Corner
Because “new construction” in Tysons Corner means the finishing trades worked in your unit after the HVAC contractor left. Drywall dust, joint compound residue, and construction particulate are packed into the fan coil fins and flex duct interiors before you ever move in. We’ve photographed this in towers along Westpark Drive and at The Boro. The flex collar is often loose, the plenum is unsealed, and the coil is already loaded. A brand-new unit can fail on day one. Call (240) 318-7712 for a camera inspection and written scope.
Yes, and in Tysons Corner it applies specifically to the short-run connections. VRF and fan coil systems use flex duct collars and plenum connections in mechanical closets. Those connections leak, pull loose, and were often never properly sealed at installation. The “ductwork” is short, but the repair point is critical. We re-secure collars, mastic-seal plenums, and insulate where condensation forms. This is a different skill set than long-trunk residential work, and it’s exactly what Tysons Corner’s building stock requires.
It is common, and it is a problem. Technicians working Tysons towers consistently find that building management has no duct maintenance protocol for “new” construction. The assumption is that CO means clean. The reality is that finishing-trade debris was left in the system and has been cycling through your unit since move-in. We document this with before-and-after photography on every job. If your building has no service record since CO, you are almost certainly operating on contaminated, leaking duct connections. Call (240) 318-7712 for a written assessment.
It is both, and the repair fixes both. A loose collar leaks conditioned air into the wall cavity. In Tysons Corner’s humid climate, that leak condenses and creates mold conditions. Simultaneously, the loose collar lets construction dust and hallway particulate bypass the filter and enter your supply air. We re-secure the collar with a proper draw band, seal with mastic, and verify the connection holds. The dust puffs stop. The condensation risk drops. The unit’s airflow returns to design range. One repair, multiple problems solved. Call (240) 318-7712 for a written price on the repair.
It affects how we approach containment and filtration during repair work, and it affects how quickly your system loads with particulate after repair. The interchange generates abnormally high vehicle exhaust particulate that loads commercial HVAC fresh-air intakes year-round. In Tysons Corner towers, that means your fan coil filter is working harder than comparable units in McLean or Vienna. When we repair and seal your duct connections, we also assess whether your filter schedule and grade are adequate for this specific load. The repair is point-source. The filtration strategy is ongoing. We document both in your job record.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Tysons Corner and Northern Virginia since 2013.