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 Vienna
Duct repair and sealing in Vienna, VA typically costs $280-$750 for most homes, with full-system sealing on older properties running toward the higher end. We dispatch crews to Vienna from our Washington, DC scheduling office, and most Vienna appointments are booked within 48 hours of first contact. Call (240) 318-7712 for a written estimate before any work starts.
We’ve been working in Vienna since 2013, and the housing stock here tells a consistent story. The core neighborhoods are packed with 1960s-1980s split-levels and raised-ranches, many carrying original galvanized steel or early fiberglass-lined ductwork through unconditioned crawl spaces. These systems weren’t designed for the humidity loads Northern Virginia now sees every July, and decades of kitchen additions and basement finishes have left duct layouts that barely resemble the original plans. Our Duct Repair & Sealing team documents every run with before-and-after photography, because in Vienna, what you can’t see in your crawl space is usually what’s driving your energy bills and your allergy symptoms.
Why CleanRun Air Duct Cleaning Alexandria Is Vienna’s Preferred Duct Repair & Sealing Company
Vienna homeowners don’t buy services from billboards. They research. They verify license numbers. They ask neighbors on Nextdoor who actually showed up, took photos, and put the price in writing. That’s the customer we built CleanRun for.
We’ve served over 52,000 homes since 2013, every one with a written price before work started and a Documented Photo Record delivered at completion. Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise applies to every Vienna job in writing, not as a verbal courtesy.
Our crews know the difference between a teardown-rebuild on a narrow Town of Vienna lot and the original 1972 raised-ranch next door. That matters when you’re deciding whether to seal existing galvanized trunk lines or replace them entirely. We coordinate scheduling from our Washington, DC office, but the trucks that roll to Vienna carry the flex-duct tools and mastic sealant specific to the problems we find here.
Bring us any competitor’s written estimate. Under our Free Second Opinion policy, we’ll put our number beside it - line item by line item - at no cost.
Our Duct Repair & Sealing Services in Vienna
Duct Sealing
Most Vienna homes we inspect leak 20-35% of conditioned air before it reaches the registers. The culprit is rarely a single dramatic tear. It’s pinholes at rusted galvanized seams, failed tape at junctions where 1980s additions tied into original trunks, and gaps where flex duct has pulled loose from collars in humid crawl spaces. We seal with mastic sealant, not duct tape - mastic remains flexible and airtight through Vienna’s freeze-thaw cycles and summer humidity spikes. A typical duct sealing job in Vienna runs $280-$450 for partial-system work and $550-$750 for full trunk-and-branch sealing. We pressurize the system and verify with a smoke pencil or digital manometer before we sign off.
Flex Duct Repair
Flex duct in Vienna’s older homes is often a patchwork of original 1970s runs and later extensions added during basement finishes. The inner liner degrades from condensation in crawl spaces where relative humidity routinely hits 80% in August. We replace collapsed, water-damaged, or mold-colonized flex duct with new insulated flex, properly supported to prevent sagging, and sealed with mechanical collars and mastic. Partial flex duct replacement in Vienna typically runs $180-$340 per run. We photograph the damage before touching anything.
Metal Duct Repair
Original galvanized steel trunks in Vienna split-levels rust from the outside in. Condensation forms on the cold metal surface in unconditioned crawl spaces, and the seams - never designed to be airtight - corrode open. We can patch isolated rust-through with metal sleeves and mastic, but when the trunk is perforated along multiple feet, replacement becomes the honest recommendation. Metal duct repair in Vienna ranges from $220 for localized patching to $800+ for trunk replacement, depending on accessibility and length.
Duct Insulation
Uninsulated or degraded duct insulation is a hidden problem in Vienna’s crawl-space construction. When cold supply air passes through a 95-degree crawl space in July, condensation forms on the duct exterior, dripping onto insulation that then compresses, molds, or falls away entirely. We install new foil-faced duct insulation with proper vapor barriers, sealed at all seams. Duct insulation work in Vienna typically runs $320-$580 for crawl-space trunk lines. The equipment we use includes Nikro negative-pressure extractors and Abatement Technologies HEPA containment systems.
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 Vienna
CleanRun crews carry professional-grade equipment from trade-recognized brands: Rotobrush agitation systems, Nikro negative-pressure extractors, Abatement Technologies containment hardware, Honeywell airflow measurement tools, Aprilaire humidity control components, and Guardsman protective materials. We don’t buy tools from hardware store shelves. These are manufacturer-specified systems that technicians can verify independently. For Vienna customers, this means parts and compatible materials are available without the multi-week delays that plague companies using proprietary or off-brand equipment. If your system includes Honeywell or Aprilaire components, we stock the sealants, collars, and insulation rated for those specifications.
Common Duct Repair & Sealing Problems We See in Vienna Homes
- Galvanized trunk rust-through in crawl spaces. Vienna’s 1960s-1980s split-levels route original steel ducts through unconditioned crawl spaces where summer humidity creates perpetual condensation. The seams rust open, pulling in crawl-space air and oak pollen from the dense canopy above.
- Blind 90-degree junctions from room additions. In neighborhoods off Lawyers Road and the Church Street corridor, 1970s duct systems extended through exterior soffits and tied into additions at odd angles. These junctions trap debris and resist cleaning without specialized flex-duct agitation tools.
- Degraded flex-duct inner liners. Northern Virginia’s humid subtropical climate pushes relative humidity above 70-80% for weeks each summer. In Vienna’s crawl spaces, this moisture degrades flex duct liners and promotes mold colonization long before homeowners smell anything.
- Failed insulation releasing fibers. Early fiberglass-lined ductwork in Vienna’s older homes has insulation that breaks down after 40+ years, releasing particles into the airstream and losing its condensation barrier - especially common in properties adjacent to recent teardown-rebuilds where the original system was patched rather than replaced.
Pricing for Duct Repair & Sealing in Vienna, VA
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts. Here’s what duct repair and sealing costs in Vienna’s market:
| Service | Typical Range in Vienna |
|---|---|
| Partial duct sealing (mastic, smoke-test verified) | $280-$450 |
| Full-system duct sealing | $550-$750 |
| Flex duct repair / replacement (per run) | $180-$340 |
| Metal duct patching (localized rust-through) | $220-$380 |
| Metal trunk replacement (crawl space, per linear foot) | $65-$95 |
| Duct insulation (crawl-space trunk lines) | $320-$580 |
| Camera inspection with Documented Photo Record | $95-$145 (credited toward repair if scheduled) |
What moves a job toward the higher end: multiple blind junctions requiring disassembly, extensive rust-through on galvanized trunks, crawl-space access limited by height or moisture conditions, and homes where additions have created non-standard duct geometry. What we never do: quote a low per-vent teaser and rewrite the invoice once the truck is in your driveway. Every Vienna customer receives one flat price per system, agreed in writing, before a panel comes off.
We Also Serve Cities Near Vienna
Our crews work throughout Northern Virginia, including Vienna and the surrounding communities of Falls Church, Fairfax, Reston, and Arlington. Dispatch and scheduling are coordinated from our Washington, DC office. Each city page details the specific housing stock and duct problems we find there - Vienna’s 1970s soffit-routed systems differ materially from what we see in Reston’s townhome clusters or Arlington’s pre-war conversions.
Serving Vienna, VA - Our Local Coverage Area
We’re based in the Vienna 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 Vienna
Vienna’s dense mature tree canopy - enforced by town tree preservation ordinances - produces significantly higher oak and maple pollen loads than more heavily cleared areas like Tysons Corner or Reston. When your duct system has even minor leaks in the return or supply side, that pollen gets pulled in continuously and deposits in junctions and low-velocity zones. The same leak volume in a less wooded area pulls in far less organic material. Call (240) 318-7712 and we’ll pressurize-test your system to quantify the leak rate and show you the photo evidence.
A blind 90-degree junction is a duct turn with no straight access before or after the bend, making it impossible to pass a standard cleaning brush or inspection camera through. In Vienna neighborhoods off Church Street and Lawyers Road, 1970s contractors ran flex duct through exterior soffits and then tied in room additions at sharp angles without installing access panels. The result is a debris trap that standard equipment can’t reach. We flag these with specialized flex-duct cameras and open them with controlled cuts when sealing or replacement is required. Call (240) 318-7712 for an inspection if your home dates to this era.
It depends on the extent of rust and whether the seams have structurally failed. Localized rust-through on a 1968 galvanized trunk can often be patched with metal sleeves and mastic sealant, preserving the original duct geometry. When rust is generalized along multiple feet of trunk, or when the original seams have opened so widely that the duct has lost structural integrity, replacement becomes the only repair that will hold. We make this determination with a camera inspection and deliver the photo evidence before recommending either path. Call (240) 318-7712 for a written assessment.
The ordinance itself doesn’t regulate your ducts, but its effect on your indoor air quality does. By preserving Vienna’s dense oak and maple canopy, the town ensures that pollen loads remain extraordinarily high each spring compared to neighboring communities. If your duct system has any leakage - and most 1960s-1980s systems do - that pollen enters continuously, accelerating debris accumulation and, in humid crawl spaces, supporting mold growth. Homes under this canopy benefit from more frequent inspection and more aggressive sealing than equivalent homes in cleared areas. Call (240) 318-7712 to review your system’s leak rate against Vienna’s specific pollen load.
We recommend flex duct replacement when the inner liner has degraded from condensation (visible as powdering, tearing, or delamination), when the insulation is water-stained or compressed, or when mold colonization is present on the liner surface. Sealing alone cannot restore a degraded inner liner, and mastic applied over mold simply seals the problem inside. In Vienna’s crawl-space construction, we find these conditions in roughly 40% of flex duct runs older than 25 years. The camera shows the difference clearly, and we deliver those photos as part of our standard Documented Photo Record. Call (240) 318-7712 for an inspection that shows you exactly what you’re dealing with.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Vienna and Northern Virginia since 2013.