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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Repair & Sealing Across Reston
Duct repair and sealing in Reston, VA typically costs $280-$650 for most residential jobs, with full flex-duct replacement in older cluster homes running $1,200-$2,400 depending on access and length. We dispatch crews to Reston from our Washington, DC coordination office, and most appointments are scheduled within 3-5 business days. Call (240) 318-7712 for a written estimate before any work begins.
We’ve worked in Reston since 2013, and the pattern is consistent: homeowners in Lake Anne, Hunters Woods, and South Lakes call us after a duct cleaning quote turns into a repair conversation. The vacuum truck shows up, the tech opens a panel, and suddenly there’s talk of disconnected runs, crushed flex, or material too deteriorated to clean. That’s where our Duct Repair & Sealing team comes in. We don’t sell cleaning on ductwork that needs structural repair. We photograph what we find, write the scope, and agree on a price before a single connection gets touched.
Why CleanRun Air Duct Cleaning Alexandria Is Reston’s Preferred Duct Repair & Sealing Company
Reston homeowners research before they call. We built our process around that.
Our reputation in Reston is documented, not declared. We’ve served homes in the 20190, 20191, and 20194 zip codes, and our Duct Repair & Sealing in Reston jobs follow the same protocol every time: written price delivered before work starts (Haven Standard Clause 1), background-checked uniformed technicians identified by name before arrival (Haven Standard Clause 3: Verified Crews), and a photo record of every duct run before and after, delivered as a standard job document. No manager approval needed. No “call for pricing.”
Scheduling runs through our live-answer line, 24/7. Crews carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies on every Reston job, and our 365-Day Done Right Promise is backed in writing, not just stated in marketing copy. If the work isn’t right, we make it right.
Our Duct Repair & Sealing Services in Reston
Duct Sealing
Sealing is often the most cost-effective fix in Reston’s older homes. The original duct runs in Lake Anne and Hunters Woods cluster homes were assembled with tape and early mastic that has dried, cracked, or failed entirely after 50+ years of thermal cycling. We seal accessible seams with modern mastic sealant and reinforced mesh, then pressure-test to verify the seal holds. In garden apartments throughout South Lakes, shared air-handling infrastructure means leaks in one unit pull unconditioned air from crawlspaces and mechanical rooms into neighboring units. Sealing the plenum (the main distribution box) and trunk connections stops that cross-contamination. A typical duct sealing job in Reston runs $280-$450 for a single-family cluster home, $180-$320 per unit in multi-family garden apartments with shared access.
Flex Duct Repair
Flex duct, the ribbed plastic-and-wire tubing common in crawlspace and attic runs, fails predictably in Reston’s climate. Northern Virginia’s humid summers, with dew points routinely above 70°F in July and August, create condensation inside poorly insulated flex runs. The moisture collects at low points, the inner liner delaminates, and the wire helix rusts through. In slab-on-grade garden apartments around Hunters Woods and South Lakes, we’ve found flex duct that has rotted from the inside out while looking intact from the outside. Our repair protocol: camera inspection to locate the damage, HEPA-filtered containment during removal, replacement with insulated flex rated for the application, and mastic-sealed collars at every connection. Single flex run replacement in Reston typically runs $340-$580; multiple runs in a cluster home with crawlspace access can reach $1,200-$2,400.
Metal Duct Repair
Reston’s newer housing stock, including high-rise condominiums near Wiehle-Reston East and Reston Town Center, uses galvanized steel trunk lines and vertical shaft systems that flex duct can’t serve. These metal systems develop seam separation, corrosion at condensate collection points, and noise from loose internal liners. We repair accessible metal duct with slip joints and sealed rivets, replace corroded sections with matching gauge material, and insulate exterior surfaces to prevent the sweating that plagues partially below-grade mechanical rooms. Metal duct repair in Reston’s multi-story buildings runs $450-$890 depending on access complexity and whether scaffolding or confined-space protocols are required.
Duct Insulation & Mastic Sealant
Insulation is the forgotten half of duct sealing in Reston. The original fiberglass duct board in 1960s-era homes had an R-value of roughly 4, inadequate for the temperature differential between a 95°F July attic and 72°F conditioned air. We wrap repaired or replaced runs with formaldehyde-free duct insulation and seal every penetration with mastic sealant rated for the temperature range. The mastic we use remains flexible at -20°F and 250°F, so it won’t crack during Reston’s freeze-thaw cycles. Insulation and sealant work added to a repair scope typically runs $180-$340 for a cluster home’s accessible runs.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Reston
Our equipment roster includes Rotobrush for mechanical agitation in residential duct runs, Nikro for negative-pressure extraction systems, and Abatement Technologies for HEPA containment during repair work. We also install Aprilaire zone dampers and media air cleaners when repair scope includes upgrading airflow control. These are trade-recognized brands customers can verify independently. We don’t stock decorative badges. We stock parts that fit Reston’s housing stock: collar sizes for 1960s-era duct board transitions, flex diameters common in cluster-home crawlspaces, and mastic formulations that cure in the humidity of a Northern Virginia July.
Common Duct Repair & Sealing Problems We See in Reston Homes
- Original fiberglass duct board shedding fibers. In Lake Anne and Hunters Woods homes built 1964-1968, the fiberglass duct board has softened to the point where mechanical cleaning dislodges fibers directly into the airstream. The camera shows a fuzzy, deteriorated interior surface. Cleaning makes it worse. The fix is removal and replacement with sealed rigid duct or insulated flex, not another vacuum pass.
- Legacy asbestos-containing mastic on original seams. Some ducts installed through 1968 were sealed with mastic containing asbestos fibers. When our tech finds this during inspection, work stops immediately. We issue an abatement referral before any mechanical repair or cleaning proceeds. Homeowners who skip this step and hire a cut-rate cleaner first end up paying twice: once for the incomplete job, again for proper abatement and repair.
- Disconnected or crushed flex runs in crawlspaces. The field vignette from Lake Anne: a cluster-home owner called after visible dust plumes from supply registers. Our tech found three disconnected flex runs and one crushed trunk feeding the main bedroom, all hidden above a finished basement ceiling. We HEPA-filtered during the entire job, reconnected and sealed the runs with mastic and mesh, and pressure-tested before restoring the registers.
- Condensation-driven mold and rot in slab-on-grade units. Hunters Woods and South Lakes garden apartments with undersized, poorly insulated runs sweat constantly through July and August. Dew points above 70°F drive condensation inside the duct. Mold colonizes. Flex runs rot from the inside out at the low points. Sealing alone won’t fix this; the runs need replacement with properly insulated material and often upsizing to reduce air velocity and temperature differential.
Pricing for Duct Repair & Sealing in Reston, VA
| Service | Typical Range in Reston |
|---|---|
| Duct sealing (single-family cluster home) | $280-$450 |
| Duct sealing (garden apartment, per unit) | $180-$320 |
| Single flex duct run repair/replacement | $340-$580 |
| Multiple flex runs, cluster home with crawlspace | $1,200-$2,400 |
| Metal duct repair (multi-story building) | $450-$890 |
| Insulation and mastic sealant add-on | $180-$340 |
These ranges reflect Reston’s specific housing stock: older homes with limited access, shared infrastructure in multi-family buildings, and the occasional abatement referral that adds scope. Every job gets a written price before work starts, no exceptions. Bring a competitor’s written estimate and we’ll put our number next to it, free. Estimates are free. Call (240) 318-7712.
We Also Serve Cities Near Reston
Our crews work throughout Northern Virginia. We regularly repair and seal ductwork in Herndon, where newer subdivisions have different failure modes than Reston’s founding villages; Sterling, with its mix of 1980s-2000s single-family stock; Vienna, where older homes on larger lots present unique access challenges; and Chantilly, including the growing corridor near Route 50. Scheduling and dispatch for all these areas runs through our Washington, DC coordination office.
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 usually needs partial or full replacement, not cleaning. The fiberglass duct board in Lake Anne homes built 1964-1968 has softened over 50+ years of humidity cycles, and mechanical cleaning dislodges fibers directly into your air supply. Our camera inspection shows whether the interior surface is intact or deteriorated. If it’s shedding, we write a replacement scope with sealed rigid duct or insulated flex, agree on a price, and execute. Call (240) 318-7712 for a camera inspection and written estimate.
Yes, many do, and yes, it affects both scope and sequencing. The cluster-home and garden-apartment layouts common in South Lakes and Hunters Woods share air-handling infrastructure, so leaks or mold in one unit can degrade air quality for adjacent neighbors. We coordinate access with building management when needed, and we seal shared plenums and trunk connections to prevent cross-contamination. The repair is documented with photos of shared components so all parties have a record. Call (240) 318-7712 to discuss multi-unit protocols.
Work stops on the spot, and we issue a written abatement referral before any mechanical work proceeds. Legacy asbestos-containing mastic is documented on some ducts installed in Reston through 1968. Our technicians are trained to recognize it; continuing work would disturb fibers and violate EPA NESHAP protocols for residential buildings. After certified abatement, we return to complete the repair with a new written scope. Homeowners who skip the abatement step and hire a cleaner who doesn’t check end up paying for the incomplete job plus abatement plus repair. Call (240) 318-7712 and we’ll inspect before any commitment.
Sealing is worth it when the flex is structurally sound; replacement is necessary when it’s rotted or delaminated. In Reston’s slab-on-grade garden apartments, we often find flex that looks intact but has rotted from the inside out at condensation low points. The camera tells the difference. Sealing intact runs with mastic and upgrading insulation costs $280-$450 and extends service life significantly. Replacing rotted runs costs more upfront but prevents repeated mold cycles. We photograph the condition and write both options when they apply. Call (240) 318-7712 for a camera inspection and written comparison.
We pressure-test and photograph. Every repair concludes with a documented pressure test showing sealed-system performance against the design airflow for your unit, plus before-and-after photos of every duct run delivered as part of your standard job record. Haven Standard Clause 1 requires written price before work; our documentation protocol requires written evidence after. The 365-Day Done Right Promise means if the seal fails or a connection separates, we return and make it right. Call (240) 318-7712 to schedule a repair with documented verification.
Ready to fix what’s actually wrong with your ductwork? Call (240) 318-7712 for a free estimate with a written price before any work starts. Every job includes a Documented Photo Record of every duct run and is backed by our 365-Day Done Right Promise. Tomas Reyes and the team at CleanRun Air Duct Cleaning Alexandria will answer your call live, 24/7.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Alexandria, serving Reston since 2013.