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 Ashburn
Duct repair and sealing in Ashburn typically costs $280-$650 for most residential jobs, with flex duct replacement running higher when multiple attic runs are involved. We dispatch crews to Ashburn from our Washington, DC coordination office, and most Broadlands, Brambleton, and Ashburn Farm appointments are scheduled within a few business days. Call (571) 526-0015 for a written estimate delivered before any work starts.
We’ve been driving the Dulles Greenway to Ashburn since 2013. The housing stock here is different from Leesburg or Sterling. It’s almost entirely planned-community construction from 1995 to 2015, built fast, with long flex duct runs through hot attics that are now hitting the age where original installation shortcuts start showing up as real problems. Our Duct Repair & Sealing team knows what to look for before we open the first register.
Why CleanRun Air Duct Cleaning Fairfax Is Ashburn’s Preferred Duct Repair & Sealing Company
Ashburn homeowners research before they call. We built our company around that.
Every job starts with a written price under Haven Standard Clause 1, not a verbal guess that changes when the crew arrives. Since 2013, we’ve served more than 52,000 homes with this rule, and every one received a Documented Photo Record of every duct run, before and after, as a standard deliverable. You don’t have to trust our word about what was in your attic. You’ll see it.
Our technicians are background-checked, uniformed, and identified by name before arrival, operating under Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise is backed in writing on every job, not buried in a policy manual. If the work isn’t right, we make it right.
We also offer a Free Second Opinion on any written estimate from a competitor. Bring us another company’s quote. We’ll put our number next to it, in writing, with no obligation.
Our Duct Repair & Sealing Services in Ashburn
Flex Duct Repair
Ashburn’s tract homes were built with extensive flex duct runs through unconditioned attics, installed quickly during the Northern Virginia construction boom. After 15-25 years, these sections collapse at hanger points, kink at turns, or sag where support straps have failed. We rebuild with properly supported flex, sealed with mastic at every takeoff, and photograph the full run before we close the attic. A typical flex duct repair in Ashburn runs $340-$580 per run, depending on length and accessibility.
Air Leak Repair
The original builder-installed takeoffs in Broadlands and Brambleton homes were often stapled and taped rather than sealed with mastic. Joints leak conditioned air into the attic and pull in fiberglass insulation, pollen, and attic dust instead. We pressure-test the system, locate every leak with a smoke pencil or theatrical fog, then seal and re-test. Most Ashburn homes need $280-$450 of leak remediation to restore design airflow.
Mastic Sealant Application
Mastic is a water-based sealant that remains flexible after curing, unlike duct tape which dries and fails. We apply it to every joint, seam, and takeoff connection in accessible ductwork. In Ashburn’s humid summers, with dew points regularly in the low-to-mid 70s°F, mastic-sealed systems hold their integrity where tape-backed joints fail within seasons. Mastic sealing as a standalone service in Ashburn typically runs $380-$620 for a full system.
Metal Duct Repair
Some Ashburn homes, particularly earlier builds in Ashburn Farm and older townhome clusters, have galvanized steel trunk lines. These corrode at seams, separate at drive cleats, or rattle loose from vibration. We patch, re-seal, or replace sections as needed, always with mastic finish. Metal duct repair in Ashburn generally falls between $320 and $550.
Duct Insulation
When summer attic temperatures in Ashburn exceed 120°F, poorly insulated flex ducts condense internally against the cool air stream. The moisture stains we photograph are often the first sign a homeowner sees. We reinsulate with formaldehyde-free duct wrap or replace with pre-insulated flex, solving the condensation problem at its source. Insulation work in Ashburn runs $420-$780 depending on linear footage.
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 Ashburn
Our equipment roster includes Rotobrush mechanical agitation systems, Abatement Technologies negative-air machines, and Aprilaire media filters, all names customers can verify independently. We don’t use shop vacs with brush attachments and call it duct cleaning. For sealing and repair work, we stock Guardsman mastic compounds and Nikro HEPA collection equipment. Parts and materials are carried on every Ashburn truck, so most repairs don’t wait on a supply run. If your system uses Honeywell or Aprilaire components, we match manufacturer specifications without improvisation.
Common Duct Repair & Sealing Problems We See in Ashburn Homes
- Collapsed flex trunks in unconditioned attics. The long, poorly supported flex runs installed during rapid tract construction in Brambleton and Broadlands sag over time. We camera-inspect one house on the block and can predict what the next 40 need. The pattern is that consistent.
- Stapled-and-taped takeoffs leaking into the attic. Original construction joints weren’t mastic-sealed. They pull in Loudoun County’s heavy spring oak pollen and fiberglass insulation instead of conditioned air. Your filter stays clean while your attic gets vacuumed.
- Moisture staining from summer condensation. When Northern Virginia dew points hit the low 70s°F, cool air moving through 120°F+ attic ducts creates internal condensation. The microbial growth that follows only shows up on camera. Homeowners smell it before they see it.
- Construction debris still in the system from original build-out. Drywall dust, wood chips, and packing materials left in ducts during the 1995-2015 building wave are now compacted with 15-25 years of household dust. These systems were never properly cleaned at handover.
Pricing for Duct Repair & Sealing in Ashburn, VA
| Service | Typical Range in Ashburn |
|---|---|
| Air leak repair (sealing accessible joints) | $280-$450 |
| Flex duct repair / replacement (per run) | $340-$580 |
| Mastic sealant (full system) | $380-$620 |
| Metal duct repair | $320-$550 |
| Duct insulation (per run or trunk) | $420-$780 |
| Combined repair + sealing package | $680-$1,200 |
These are whole-system prices, not per-vent teasers. Every Ashburn job is quoted with a written price before work begins, under Haven Standard Clause 1. No exceptions. What changes the number: attic accessibility, linear footage of damaged duct, whether the air handler location requires additional protection, and whether we find collapsed sections that weren’t visible from the registers. We photograph everything and show you before we quote the repair. Call (571) 526-0015 for an exact number. Estimates are free.
We Also Serve Cities Near Ashburn
Our crews work throughout Loudoun and Fairfax Counties, including Ashburn neighbors Sterling, Herndon, Reston, and Centreville. The same written-price protocol, same documented photo record, same 365-Day Done Right Promise applies to every appointment.
Serving Ashburn, VA - Our Local Coverage Area
We’re based in the Ashburn 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 Ashburn
Yes. A 2008 Ashburn tract home is now 17 years old, squarely in the window where original construction debris has compounded with household dust and flex duct has begun to sag or collapse at hanger points. The builder almost certainly did not perform source-removal cleaning at handover. Camera inspection will show you what’s in there. Call (571) 526-0015 to schedule.
The homes are larger, with more extensive multi-zone duct systems routed through longer attic runs, and the original flex duct was installed rapidly during the construction boom with less support infrastructure than older metal systems. More linear footage, more joints, more accessibility challenges. The flip side: the problems are so consistent across Broadlands and Brambleton that experienced crews work efficiently once they’re in the attic. Call (571) 526-0015 for a written estimate specific to your house.
Often, yes. Uneven airflow in these floor plans usually traces to a collapsed flex trunk, a disconnected takeoff, or significant leakage at joints above the ceiling. We measure static pressure and airflow at every register before and after repair. The Brambleton townhome we mentioned earlier went from barely-moving second-floor registers to balanced airflow across all rooms after rebuilding the collapsed attic run and sealing the takeoffs with mastic. Call (571) 526-0015 to have your system tested.
Negative-pressure extraction is the only method that removes debris from the full duct run without pushing it into your living space or deeper into the system. A vacuum at the register only cleans what the hose can reach, typically the first few feet. We use Abatement Technologies negative-air machines with HEPA filtration, combined with mechanical agitation from Rotobrush tools, to dislodge and extract debris from the entire duct run. The photo record shows the difference. Call (571) 526-0015 to see what this means for your system.
Duct cleaning removes accumulated debris; duct sealing closes leaks that waste energy and pull in attic air. Many Ashburn homes need both. If your ducts are 15-25 years old with original construction debris plus stapled-and-taped joints that have dried out, cleaning without sealing leaves the leaks active, and sealing without cleaning traps debris against your air handler. We camera-inspect and pressure-test to determine what your specific system needs, then quote both services separately so you can decide. Call (571) 526-0015 for a free evaluation.
Ready to see what’s in your ducts? Call (571) 526-0015 to speak with a live person, 24/7. We’ll schedule a free estimate, deliver a written price before any work starts, and leave you with a Documented Photo Record of every run we touched. Every job is backed by our 365-Day Done Right Promise and the full H.A.V.E.N. Standard.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Ashburn since 2013.