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 Mount Prospect
Duct repair and sealing in Mount Prospect typically runs $450-$1,200 for most homes, with full-system sealing on older ranch and split-level properties reaching the upper end of that range. We dispatch crews to Mount Prospect from our Chicago office daily, and most repair jobs are scheduled within 3-5 business days. Call (224) 351-9772 for a written estimate before any work starts.
We’ve worked on enough Mount Prospect homes to know what the camera finds inside these systems. The village’s housing stock peaked between 1955 and 1975, which means most forced-air ductwork is now 50-70 years old. Original fiberglass duct board liners degrade. Flex runs disconnect in finished basements. Plenums draw moisture through slab-edge foundations. Our Duct Repair & Sealing team documents every finding with before-and-after photos, and every job carries a written price under Haven Standard Clause 1.
Why CleanRun Air Duct Cleaning Northbrook Is Mount Prospect’s Preferred Duct Repair & Sealing Company
CleanRun has served Mount Prospect homeowners since 2013, completing jobs from the Rand Road corridor to the residential streets north of Central Road. Every one of those jobs started with a written price and ended with a Documented Photo Record of every duct run. The 365-Day Done Right Promise is backed in writing, not buried in a policy manual.
Our crews know the local housing. We’ve sealed plenums in raised ranches off Busse Avenue, repaired crushed flex runs in finished basements near Lions Park, and replaced degraded duct board liner in split-levels throughout the 60056 zip. Technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and they’re identified by name before arrival.
All calls are answered by a live person, 24/7. Scheduling is coordinated from our Chicago office, with crews serving Mount Prospect locally. We also offer a Free Second Opinion on any written estimate from a competitor. Bring us the quote; we’ll put our number next to it in writing.
Our Duct Repair & Sealing Services in Mount Prospect
Duct Sealing
Most Mount Prospect homes lose 20-30% of conditioned air through leaks at plenum joints, takeoff connections, and register boots. We seal with mastic and fiberglass mesh, not tape that degrades. On a typical ranch near Golf Road, we recently sealed 14 separate leak points in the basement trunk line, measured with a duct blaster before and after. The homeowner’s system static pressure improved measurably. Sealing a full system in Mount Prospect runs $650-$1,100 depending on accessibility.
Mastic Sealant Application
Mastic is the only sealant we use on metal trunk lines and plenums in Mount Prospect homes. It remains flexible, fills gaps up to 1/8 inch, and won’t fail when the furnace cycles through Chicago’s temperature swings. We apply it with a brush at all longitudinal seams and transverse joints, then embed fiberglass mesh at stress points. A typical mastic sealing job on a 1960s ranch system takes 4-6 hours and costs $550-$900.
Flex Duct Repair
Flex duct in Mount Prospect’s finished basements gets crushed, disconnected, or kinked where it routes through tight soffits. On that raised ranch off Busse Avenue, our tech found a disconnected flex run feeding a rear bedroom. We reconnected it with a mechanical collar, supported it properly to prevent sag, and sealed the connection. Flex duct repair in Mount Prospect typically runs $180-$340 per run, with most homes needing 1-3 repairs.
Metal Duct Repair
Original galvanized steel trunk lines in Mount Prospect’s older homes corrode at the bottom where condensation collects, or separate at drive cleats. We patch corroded sections with matching gauge metal, re-secure cleats, and seal with mastic. Full section replacement is rare but documented with photos when needed. Metal repairs range from $220 for a patch to $600 for section replacement.
Duct Insulation
Uninsulated or poorly insulated ductwork in Mount Prospect basements loses heat in winter and gains it in summer. We install foil-faced fiberglass insulation on exposed trunk lines, sealed at all seams. Insulation work runs $400-$800 for a typical ranch basement 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.
BeforeAfterTrusted Brands We Service in Mount Prospect
CleanRun crews carry professional-grade equipment from trade-recognized brands: Rotobrush agitation systems for mechanical debris removal, Nikro and Abatement Technologies negative-pressure extractors with HEPA filtration, and Honeywell and Aprilaire air quality components for integrated system work. We stock common repair parts for Mount Prospect’s dominant HVAC brands, which means most sealing and repair jobs are completed in a single visit without waiting on supply-house orders.
Common Duct Repair & Sealing Problems We See in Mount Prospect Homes
- Degraded fiberglass duct board liner. Original 1960s-70s trunk lines in Mount Prospect were internally lined with fiberglass duct board that degrades after 50+ years of thermal cycling. The liner sheds fibrous particulate directly into the conditioned airstream. A standard surface clean leaves the source untouched; proper repair requires source removal and resealing.
- Inaccessible branch takeoffs in low finished basements. On many of Mount Prospect’s interior residential streets, original radial layouts route main supply ducts through low finished-basement ceilings, leaving branch takeoffs nearly inaccessible without proper flex-line equipment. Technicians from outside the northwest suburbs often underestimate this configuration, leaving terminal runs farthest from the air handler full of decades of debris.
- Seasonal moisture infiltration in basement plenums. Mount Prospect’s slab-edge and poured-wall foundations allow moisture into basement return-air plenums during humid summer months. This creates conditions for microbial growth inside the duct system, which sealing alone won’t fix without source removal first.
- Disconnected or crushed flex runs. Original flex duct in Mount Prospect’s finished basements has often been damaged by storage, renovation work, or simply gravity over 50+ years. We find disconnected runs feeding distant bedrooms on roughly one in three jobs in the village.
Pricing for Duct Repair & Sealing in Mount Prospect, IL
Here’s what duct repair and sealing costs in Mount Prospect’s market:
| Service | Typical Range |
|---|---|
| Duct sealing (full system, mastic + mesh) | $650 - $1,100 |
| Mastic sealant application (partial system) | $550 - $900 |
| Flex duct repair (per run) | $180 - $340 |
| Metal duct repair (patch) | $220 - $400 |
| Metal duct section replacement | $450 - $600 |
| Duct insulation (basement trunk lines) | $400 - $800 |
Three factors push Mount Prospect jobs toward the higher end: finished basements with boxed-in takeoffs requiring extra labor, degraded duct board liner needing source removal before sealing, and homes with extended radial layouts common in the village’s 1960s-70s builds. Every price is written before work starts, every time, under Haven Standard Clause 1. No per-vent pricing. No add-ons once the truck is in your driveway. Call (224) 351-9772 for a free written estimate.
We Also Serve Cities Near Mount Prospect
CleanRun crews work throughout the northwest suburbs, including Duct Repair & Sealing in Mount Prospect and neighboring Des Plaines, Arlington Heights, Palatine, and Elk Grove Village. Scheduling is coordinated from our Chicago office with local dispatch to each community.
Serving Mount Prospect, IL - Our Local Coverage Area
We’re based in the Mount Prospect 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 Mount Prospect
If you’re seeing dust accumulation at registers, uneven heating between rooms, or visible fiberglass debris around vent openings, the duct board liner has likely degraded and cleaning alone won’t solve it. We inspect with a camera first; if the liner is shedding or flex runs are disconnected, we’ll show you the photo and quote sealing or repair work separately from cleaning. Call (224) 351-9772 to schedule a camera inspection.
Mount Prospect sits roughly 4-5 miles east of O’Hare International Airport, beneath heavily trafficked departure and approach corridors. Homes here draw measurably higher concentrations of ultra-fine aviation particulate through return-air intakes compared to suburbs farther from the airport. That particulate loads into older ductwork faster, accelerating liner degradation and debris accumulation. Proper sealing reduces infiltration of unfiltered air, and source removal clears what’s already inside. The combination matters more here than in communities farther from the flight paths.
Yes. We carry flex-line equipment specifically for Mount Prospect’s common configuration: radial trunk-and-branch layouts routed through low finished-basement ceilings with boxed-in takeoffs. On a recent job near Lions Park, we accessed terminal runs that three previous companies had skipped because their rigid equipment wouldn’t navigate the soffits. We photograph every run we access so you can verify the work.
We don’t seal over degraded liner; we remove it first. The process is mechanical agitation with Rotobrush tools under negative pressure and HEPA filtration, followed by application of a new internal sealant coating where appropriate, then sealing of all plenum joints and takeoffs with mastic and mesh. The full job takes 6-8 hours for a typical Mount Prospect ranch. You’ll receive before-and-after photos of every run, plus the written scope and price agreed to before we started.
Chicago’s humid continental climate subjects Mount Prospect HVAC systems to extreme seasonal demands: furnaces run hard for five or more months, then humid cooling seasons follow. That thermal cycling expands and contracts metal joints, loosening seals over decades. Basement humidity in summer also degrades mastic and tape on unsealed plenums. We use mastic rated for this cycle range, and we inspect for moisture infiltration that would compromise new sealant. Most Mount Prospect homes benefit from sealing inspection every 10-15 years. Call (224) 351-9772 for a free assessment of your system’s current condition.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Northbrook, serving Mount Prospect since 2013.