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 $340-$780 for a full system, with most jobs scheduled within two business days and completed in a single visit. Our crews are already working in Mount Prospect neighborhoods weekly - from the ranch homes near Randhurst to the split-levels along Elmhurst Road - so dispatch from our Chicago office means short drive times and flexible scheduling that respects your day.
We’ve been in Mount Prospect homes since 2013, and the pattern is unmistakable: postwar ductwork retrofitted for central AC creates repair needs you won’t find in newer construction or even in neighboring suburbs that developed more gradually. Our Duct Repair & Sealing team documents every joint, every seam, every before-and-after photo - because in a village where most duct systems are 50-70 years old, guessing is not a service.
Call (224) 385-0904 for a written estimate before any work starts.
Why CleanRun Air Duct Cleaning Schaumburg Is Mount Prospect’s Preferred Duct Repair & Sealing Company
Mount Prospect homeowners know the difference between a shop-vac visit and documented duct work. We’ve served over 52,000 homes since 2013, and our reputation in northwest Cook County is built on what we deliver in writing: a written price before the first panel comes off, a photo record of every duct run, and the 365-Day Done Right Promise backed by Haven Standard Clause 1.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The equipment we bring into Mount Prospect homes is professional-grade and name-verifiable: Rotobrush agitation systems for mechanical debris removal, Nikro negative-pressure extractors, and Honeywell media for filtration verification. These aren’t marketing names; they’re tools you can look up before you agree to a price.
Scheduling is coordinated from our Chicago office, but our crews live and work in the Mount Prospect area. That local presence matters when we’re tracking how northwest Cook County’s climate cycles - dry furnace heat October through April, then humid AC loads all summer - accelerate the exact failure modes we see in your housing stock. We don’t guess at what’s in your ducts. We photograph it.
Our Duct Repair & Sealing Services in Mount Prospect
Duct Sealing
In Mount Prospect’s ranch homes and split-levels, duct sealing is rarely a single-era repair. The original galvanized steel trunk lines from the 1950s-1970s were joined with cloth-backed tape that has dried and separated over decades. Then central AC arrived in the 1970s and 1980s with flex-duct branches spliced into makeshift plenums. Our duct sealing addresses both systems: we seal the original metal joints with mastic and rebuild the flex connections for integrity across the full airflow path. A typical duct sealing job in Mount Prospect runs $340-$580 for a single-system home.
Mastic Sealant Application
Mastic is the only sealant we use on original galvanized trunk joints in Mount Prospect homes. Unlike tape - even modern foil tape - mastic remains flexible, fills irregular gaps at corroded metal edges, and won’t dry out in the temperature swings your attic or crawlspace experiences. We apply it by brush at every accessible joint after mechanical cleaning and camera verification. The result is a sealed system that holds through heating and cooling seasons, documented in your photo record.
Flex Duct Repair
The flex-duct branches added to Mount Prospect homes for central AC are now 40-50 years old in many cases. They sag in unconditioned attics, collapse at turns, and trap condensation that feeds mold spore buildup. Our flex duct repair replaces deteriorated sections with new insulated flex, supports it properly to prevent future sagging, and seals the connections to both the metal trunk and the register boot. In split-levels near Randhurst and along Busse Road, we regularly find flex runs that have never been accessed since installation. We photograph what we find and show you before quoting repair scope.
Metal Duct Repair
Original galvanized steel ducts in Mount Prospect homes corrode at seams, separate at joints, and were never designed for the static pressures of modern HVAC equipment. Our metal duct repair includes seam reinforcement, joint rebuilding, and structural support for sagging trunk lines. Where corrosion is advanced, we section in new galvanized or switch to lined metal duct to preserve airflow capacity. This is precision work - we use camera inspection and airflow measurement before and after, not visual guesswork.
Duct Insulation
Uninsulated or degraded duct insulation in Mount Prospect’s unconditioned attics and crawlspaces wastes energy and creates condensation surfaces. We install proper insulation on repaired ductwork, sealed at all penetrations, to maintain supply air temperature and prevent the moisture conditions that accelerate mold growth. This is particularly important for the flex-duct branches added during AC retrofits, which often run through the hottest parts of the attic structure.
Air Leak Repair
Leak detection in Mount Prospect homes starts with pressure testing and smoke tracing, not guesswork. We pressurize the duct system, identify leakage points with calibrated equipment, and repair each one with appropriate materials - mastic for metal joints, proper connectors and sealant for flex transitions, and gasketed access panels where we need future service entry. Every repair is photographed and logged in your job record.
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 technicians carry professional-grade equipment from trade-recognized brands: Rotobrush mechanical agitation systems for dislodging debris in original galvanized trunks, Nikro negative-pressure extractors for controlled source removal, and Honeywell filtration media for verifying air quality improvement after repair. We don’t invent performance claims for these tools - you can look up their specifications independently, and we encourage you to. What matters is how we apply them: with a written scope, documented results, and a photo record that shows what was actually in your ducts before we sealed them.
Common Duct Repair & Sealing Problems We See in Mount Prospect Homes
- Original cloth-backed tape failure at galvanized trunk joints. In the neighborhoods around Randhurst - developed rapidly after the shopping center opened in 1962 - we regularly open return chases to find Eisenhower-era tape crumbled to dust. Attic insulation fibers and decades of debris ride the supply air through these separated seams directly into your living space. The camera shows it; we photograph it; then we seal it properly with mastic.
- Flex-duct sag and condensation damage in unconditioned spaces. The flex branches added for central AC in the 1970s and 1980s sag under slabs and through attics that see full seasonal temperature swings. Condensation pools in low spots, feeding mold spore buildup that persists through dry heating season and humid cooling season alike. Repair requires section replacement, proper support, and sealing at both ends.
- Pollen and particulate infiltration through leaky joints. Mount Prospect’s mature oak and maple canopy produces heavy spring pollen loads, and the I-90 corridor to the south generates year-round particulate. Aging leaky duct joints pull these contaminants directly into the system, so registers keep shedding dust even after surface cleaning. Sealing the envelope stops the infiltration at its source.
- Two-era hybrid systems with incompatible static pressures. Original ductwork engineered for forced-air heat was never sized for the airflow demands of central AC additions. The resulting pressure imbalances strain blower motors, exaggerate leakage at weak joints, and create noise and temperature inconsistency throughout the home. Repair often requires joint reinforcement, section replacement, and sometimes duct resizing to unify the system.
Pricing for Duct Repair & Sealing in Mount Prospect, IL
Honest pricing for Mount Prospect’s market, delivered in writing before work starts - Haven Standard Clause 1:
| Service | Typical Range |
|---|---|
| Duct sealing (single system, metal + flex) | $340-$580 |
| Flex duct repair/replacement (per branch) | $180-$340 |
| Metal duct repair (seam/joint work) | $260-$480 |
| Full system: seal, repair, insulate | $580-$780 |
| Camera inspection with written report | $120-$180 |
What moves you within these ranges: accessibility of ductwork (crawlspace vs. full basement), extent of original tape failure, number of flex branches requiring replacement, and whether insulation degradation requires removal and reinstallation. We assess all of this during camera inspection, present a written scope and price, and wait for your approval before touching tools. No per-vent pricing, no coupon bait, no invoice inflation once the truck is in your driveway. Bring a competitor’s written estimate - we’ll provide a Free Second Opinion, our number next to theirs, no cost to you.
Call (224) 385-0904 for your written estimate. Estimates are free.
We Also Serve Cities Near Mount Prospect
Our crews work throughout northwest Cook County, including Duct Repair & Sealing in Mount Prospect and surrounding communities: Des Plaines to the east, Arlington Heights to the north, Palatine to the northwest, and Elk Grove Village to the south. Each area has distinct housing stock and duct configurations - we adjust our approach accordingly, but our documentation standard never changes.
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
Every 4-6 years for homes with intact original systems; every 2-3 years if you’ve had tape failure, flex-duct degradation, or visible debris at registers. Mount Prospect’s postwar housing stock concentrates the conditions that accelerate both contamination and leakage - 50-70 year old original joints, retrofitted flex branches, and seasonal humidity cycling that stresses every connection. Homes near open land or unpaved roads, or those using supplemental wood heat, should plan toward the shorter interval. Call (224) 385-0904 and we’ll camera-inspect to give you a specific schedule based on what we find.
Mount Prospect’s residential build-out was compressed into roughly 1953-1973, creating a uniformity of aging ductwork that Palatine and Arlington Heights - which developed more gradually - simply don’t match in concentration. The original galvanized trunks were retrofitted for AC with spliced flex and makeshift plenums, producing hybrid two-era systems where both the metal and the flex now need attention. In neighboring suburbs, you might find isolated homes with this profile; in Mount Prospect, it’s the dominant housing type. That concentrated infrastructure age means sealing failure is predictable, not exceptional.
Yes, in most cases. We use mechanical agitation to clean the interior surface, camera verification to assess corrosion depth, and mastic sealant to rebuild joint integrity at every accessible seam. Replacement becomes necessary only where corrosion has perforated the metal or where structural sag has compromised airflow. In a 1962 ranch near Randhurst, our tech found original supply trunk joints wrapped in crumbling cloth-backed tape with attic insulation fibers riding the supply air through separated seams. We used Rotobrush agitation on the metal trunk, sealed failed joints with mastic, and rebuilt the flex branches feeding the 1970s AC addition. After negative-pressure source removal and HEPA filtration, the blower motor amp draw dropped and the homeowner stopped seeing insulation dust at the registers. Your photo record would show exactly what we found and what we did.
We start with camera inspection of both the original metal trunk (typically in the basement or crawlspace) and the flex branches (typically in the attic above the upper level). For the metal: mechanical cleaning, corrosion assessment, mastic sealing at all joints. For the flex: sag measurement, condensation damage check, replacement of deteriorated sections with new insulated flex on proper supports. We seal every connection point - metal-to-flex, flex-to-boot - and pressure-test the unified system before closing. The split-level’s divided attic spaces often mean we work in two separate zones; we document each independently in your photo record.
It helps significantly, but it’s one part of a system approach. Sealing the duct envelope stops the infiltration of outdoor particulate through leaky joints - oak and maple pollen in spring, road dust year-round, I-90 corridor particulate - that bypasses your filter entirely. For homes near open land or with longer rural service drives, we also recommend verifying filter MERV rating and checking whether the return air path is properly sealed from the mechanical room. After sealing, you should see reduced dust accumulation at registers and less frequent filter loading. Camera inspection before and after documents the change in joint integrity; your photo record shows the difference.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Schaumburg, serving Mount Prospect since 2013.