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 Reston
Duct repair and sealing in Reston, VA typically costs $280-$750 for most cluster-home and townhome systems, with full flex-duct replacement in shared knee-wall chases running toward the higher end. Our crews serve Reston daily from our Washington, DC coordination office, and we carry the specialized equipment needed for the tight mechanical chases that Robert Simon’s original planned-community design packed between attached units. If you’re smelling musty air, seeing uneven airflow, or your blower motor is working harder than it should, the problem often starts in ductwork that hasn’t been physically accessed in decades. Call (240) 255-4519 and we’ll put a written price in front of you before any panel comes off.
Why CleanRun Air Duct Cleaning Rockville Is Reston’s Preferred Duct Repair & Sealing Company
We’ve been documenting what we find inside Reston ductwork since 2013 - 52,000 homes later, every single job still starts with a written price and ends with a photo record of every run. Our Duct Repair & Sealing team knows the difference between a Lake Anne original cluster home with 1968 lined-metal trunks and a 2005 Town Center condo with commercial-grade air handlers. That matters because the repair protocol is completely different.
Tomas Reyes built this company on the H.A.V.E.N. Standard, and Haven Standard Clause 1 means the price you agree to is the price you pay - no per-vent add-ons, no “we found something else” once work begins. Our technicians are background-checked, uniformed, and identified by name before arrival. Every job carries the 365-Day Done Right Promise in writing, and we publish our license number on every page so you can verify it independently.
Reston customers get the same documented photo record as everyone else: before and after images from inside every duct run, delivered as part of the standard job record. You can see the crushed flex, the delaminated fiberglass liner, the partition gap we foamed - not take our word for it.
Our Duct Repair & Sealing Services in Reston
Duct Sealing
Most Reston cluster homes lose 20-30% of conditioned air through leaks before it reaches the register. In Lake Anne and Hickory Cluster units, sealing is complicated by shared attic knee-walls where one unit’s leaks pressurize adjacent spaces. We use mastic sealant - a brush-applied, fiber-reinforced compound that outlasts tape - at every joint, penetration, and partition gap. The goal isn’t just closing leaks to your living space; it’s isolating your system from cross-unit contamination that standard suburban sealing doesn’t address.
Flex Duct Repair
Original 1965-1985 flex duct in Reston’s garden condos and cluster townhomes has reached end of life. The plastic liner becomes brittle, the wire helix corrodes, and the insulation compresses. We replace collapsed runs with new flex or convert to sealed metal where space allows, using mastic at every connection. At a Hickory Cluster townhome off North Shore Drive, our tech ran camera inspection on a 1970 trunk and found the flex run to the rear bedroom crushed flat against a knee-wall joist, with fiberglass liner fragments dusting the neighbor’s return plenum through a partition gap. We cut out the collapsed flex, rebuilt the run in sealed metal with mastic at every joint, and foamed the shared partition penetration before pulling negative pressure and HEPA-vacuuming the trunk to source removal. The tech capped it by confirming a consistent blower motor amp draw and MERV 13 filter seating at the air handler.
Metal Duct Repair
Lined metal ductwork from Reston’s original construction era sheds fiberglass insulation as the adhesive fails. That debris doesn’t just stay put - in shared knee-wall chases, it migrates through unsealed partition penetrations into neighboring units. We remove deteriorated liner, repair or replace damaged sections with sealed metal, and reinsulate with closed-cell foam or foil-faced wrap rated for duct applications. This is slower work than flex replacement, but it’s the only fix for cross-unit contamination in cluster housing.
Duct Insulation
Under-insulated runs through unconditioned Reston crawl spaces sweat through Northern Virginia’s humid subtropical summers, feeding mold growth that sealing alone won’t fix. We add or replace insulation with vapor-barrier-faced products, paying special attention to the low attic knee-walls and crawl-space transitions common in Reston’s 1960s-1980s stock. Without this step, you’re sealing moisture inside the system.
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.
Before
AfterTrusted Brands We Service in Reston
Our equipment roster includes Nikro negative-pressure extractors, Honeywell media air cleaners, and Aprilaire dehumidification components - brands you can look up independently before agreeing to any work. We stock common flex duct, mastic, and sealing hardware for Reston’s predominant system types, which means most cluster-home repairs don’t wait on parts. For commercial-grade systems in Reston Town Center high-rises, we coordinate Abatement Technologies HEPA equipment and Guardsman containment protocols. The specific tools depend on what your building engineer and HOA require.
Common Duct Repair & Sealing Problems We See in Reston Homes
- Shared knee-wall cross-contamination. In Lake Anne and Hickory Cluster homes, original duct trunks run horizontally through low attic spaces shared across two or three attached units. Debris fields - pet dander, degrading fiberglass duct liner - migrate through unsealed partition penetrations into neighboring trunks, a condition almost unique to Reston’s cluster-housing typology.
- Original flex and lined metal reaching end of life. The 1965-1985 duct systems in Reston’s planned-community clusters were built with materials rated for 25-30 years. They’re now 40-60 years old. We regularly find collapsed flex runs and delaminated metal liner that hasn’t been visible since the Johnson administration.
- Condensation-driven mold in under-insulated crawl space runs. Northern Virginia’s humid subtropical summers push indoor relative humidity high enough that poorly insulated duct sections in unconditioned spaces develop sustained condensation. Reston’s dense tree canopy traps moisture longer than less-wooded neighboring communities.
- Pollen loading masking mechanical failures. Reston’s preserved oak, cedar, and maple canopy produces exceptional spring pollen loads that overwhelm standard filters and pack into return-air plenums faster than in Herndon or Sterling. Homeowners often discover crushed or disconnected runs only after the blower motor starts working harder to pull air through a packed plenum.
Pricing for Duct Repair & Sealing in Reston, VA
A typical duct sealing job in Reston runs $280-$450 for a single-family detached home or end-unit townhome with accessible basement or attic ductwork. Cluster homes in Lake Anne, Hickory Cluster, or similar 1965-1985 developments with shared knee-wall chases run $450-$750 because of the additional partition-sealing work and cross-unit isolation required. Flex duct replacement, per run, is typically $180-$340 depending on length and access difficulty. Metal duct repair with liner removal and reinsulation starts around $400 per section.
What moves the number: access difficulty (crawl space vs. finished basement), number of runs affected, whether cross-unit partition sealing is needed, and whether insulation replacement is required alongside sealing. We deliver a written price before any work starts, every time, under Haven Standard Clause 1. No exceptions. Bring a competitor’s written estimate and we’ll provide a Free Second Opinion - our number next to theirs, both in writing.
Call (240) 255-4519 for an exact quote. Estimates are free.
We Also Serve Cities Near Reston
Our crews work daily across Northern Virginia. We regularly handle duct repair and sealing in Reston and the surrounding communities of Herndon, Sterling, Fairfax, and Arlington. Each area has distinct housing stock and duct configurations, and we adjust our repair protocols accordingly - what works in a Reston cluster home differs from a Sterling single-family or an Arlington garden apartment.
Serving Reston, VA - Our Local Coverage Area
We’re based in the Reston 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 Reston
It’s likely both, because your duct trunks probably share a knee-wall chase with unsealed partition penetrations between units. We see this in Lake Anne and Hickory Cluster homes where 1965-1970 construction ran supply ducts horizontally through shared attic spaces without isolating barriers. Our repair protocol includes foaming those partition gaps after rebuilding damaged runs, so each unit’s system is isolated from its neighbors. Call (240) 255-4519 and we’ll camera-inspect to confirm the contamination path.
Most 1970s Reston garden condos need both - sealing the accessible joints and penetrations, plus replacing flex or lined-metal sections that have reached end of life. The camera tells the story. If the liner is delaminating or the flex is crushed, sealing alone traps debris and moisture inside. We deliver a written scope with photos before you decide. Call (240) 255-4519 for a free estimate.
Reston’s dense tree canopy and preserved green spaces create higher sustained humidity than less-wooded Sterling, and many Reston cluster homes have under-insulated duct runs through unconditioned crawl spaces or low attic knee-walls where condensation forms. Combined with 40-60-year-old duct materials, that’s the difference. The fix is insulation correction alongside sealing, not just killing mold that will return. Call (240) 255-4519 and we’ll show you the condensation points on camera.
We can, but Reston Town Center’s 1990s-2000s high-rises and recent mixed-use towers use commercial-grade air handling units with ductwork governed by building engineering and HOA protocols distinct from residential work. We coordinate with your building engineer, use commercial containment and HEPA equipment from Abatement Technologies, and document everything to your HOA’s specifications. The scheduling and scope differ from a single-family job. Call (240) 255-4519 to discuss your building’s requirements.
We seal three zones: joints and connections in your duct runs with mastic; gaps where ducts pass through walls, floors, or chases; and partition penetrations in shared knee-walls where cross-unit contamination occurs. The last one is specific to Reston’s cluster typology and is often the most important for air quality. Every sealed joint is photographed before and after. Call (240) 255-4519 for a written scope and price.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Reston since 2013.