Fast, Reliable Duct Repair & Sealing Across Logan Square
Duct repair and sealing in Logan Square typically runs $280-$650 for most homes, and our Duct Repair & Sealing team can usually be there same day you call. We’re based right here in Chicago and have been working the greystones, two-flats, and three-flats of the 60647 ZIP since 2012. That means we know the difference between a quick mastic touch-up on a post-war retrofit and the full metal duct restoration a 1920s Kedzie Boulevard building needs after ninety years of coal dust and renovation debris. Call (877) 502-3903 and a live person picks up, 24 hours a day. We’ll give you an honest price before we lift a single tool, and we stand behind the work for 90 days in writing.
Why Bellows Air Duct & Vent Co. of Chicago Is Logan Square’s Preferred Duct Repair & Sealing Company
We’ve earned our reputation in Logan Square one job at a time, mostly by word of mouth between neighbors on Palmer Square, along the boulevards, and in the side streets off Milwaukee Avenue. Homeowners here stay put for decades. They remember which contractor showed up on time and which one invented a surprise charge at the door.
Our response time to Logan Square averages under two hours for standard calls, and we carry the parts to finish most jobs in a single visit. That matters when your furnace is cycling on a January night and you’re losing heat through a cracked trunk duct in the basement.
What separates us from the coupon companies is simple: camera inspection before and after every job, so you see what we see. No claims without proof. And our 90-Day Done Right Promise means if something isn’t right, we come back and make it right. No paperwork to file, no argument.
Ray Dempsey has led this company since its founding, and our technicians are background-checked, uniformed, and trained on the specific duct configurations found in pre-1930s Chicago housing. We’ve worked on enough Logan Square greystones to know where the asbestos-wrapped ducts hide, which masonry chases were repurposed for forced air in the 1950s, and how to seal them without disturbing what shouldn’t be disturbed.
Our Duct Repair & Sealing Services in Logan Square
Duct Sealing
Leaky ducts can waste 20-30% of your heated or cooled air before it reaches the rooms you actually live in. In Logan Square’s vintage buildings, the problem is usually worse. Original galvanized trunk ducts from gravity-furnace conversions were never designed for the static pressure of forced air, and their joints have worked loose over decades of thermal expansion. We seal with mastic sealant and mechanical fasteners, not duct tape, and we test with a duct blaster to prove the leakage reduction. A typical duct sealing job in Logan Square runs $280-$450 for a two-flat or three-flat, depending on access.
Flex Duct Repair
Flex duct was often used for branch lines in Logan Square gut rehabs during the 1990s and 2000s, particularly in attic conversions and third-floor additions. It crushes, it kinks, and it degrades where it passes through unconditioned spaces. We replace damaged flex with properly sized, insulated runs that maintain airflow without the restriction points that burn out blower motors. Most flex duct repairs in Logan Square fall between $180-$340.
Metal Duct Repair
This is where our Logan Square experience pays off most. The large-diameter galvanized steel trunks in greystone basements often show corrosion at the low points where condensation collects, or separation at seams that were originally sealed with fabric tape now turned to dust. We cut out damaged sections, fabricate replacement pieces to match, and seal with professional-grade mastic. Metal duct repair in Logan Square typically runs $350-$650, with larger three-flat systems at the higher end. We use Rotobrush and Nikro equipment for access and cleaning prep, and we camera-document every repair.
Duct Insulation
Uninsulated basement trunk ducts are standard in Logan Square’s pre-1930s housing stock. In summer, cold air sweats on that metal. In winter, you’re radiating heat into a space nobody occupies. We wrap with formaldehyde-free fiberglass duct wrap or apply closed-cell spray foam where space allows, cutting condensation and improving delivered air temperature by 8-15 degrees. Duct insulation for a typical Logan Square two-flat basement trunk runs $400-$720. The payback through lower utility bills usually shows within two Chicago heating seasons.
Mastic Sealant
We specify high-elasticity, solvent-based mastic for Logan Square applications, not the water-based products that crack within two years of our freeze-thaw cycles. Our mastic sealant work is guaranteed for the life of the duct system, and we apply it with brushes and trowels to ensure full penetration into seams and joints. Small-scale mastic touch-ups start around $180; full system sealing with testing runs $450-$780.
Air Leak Repair
Disconnected boots, failed collars, and penetrations cut for plumbing or electrical runs all leak conditioned air into walls and ceilings. We trace these with blower-door assisted diagnostics, then repair and seal. Typical air leak repair in Logan Square homes runs $220-$480.
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.
Trusted Brands We Service in Logan Square
We stock parts and specify equipment from Honeywell, Aprilaire, and Rotobrush, the same brands serious HVAC contractors use when they’re installing systems meant to last. For Logan Square customers, that means no waiting on special orders for a replacement damper or a compatible zone control. Our trucks carry the inventory to complete most repairs same-day, whether we’re working on a Milwaukee Avenue three-flat or a carriage house off Logan Boulevard. When we do need to order, our Chicago-based supply relationships mean next-day delivery, not next-week.
Common Duct Repair & Sealing Problems We See in Logan Square Homes
- Asbestos-containing duct wrap from mid-century conversions. We inspect before any aggressive work. Disturbing asbestos requires proper containment and abatement protocol. This step is essential in Logan Square and rarely needed in newer construction.
- Condensation corrosion in uninsulated basement trunks. Chicago’s humid summers hit cold metal hard. We find pinhole leaks and seam separation in greystone basements that have gone unaddressed for thirty years.
- Ducts routed through masonry chases with no access panels. The 1950s forced-air retrofits in Logan Square two-flats often left branch ducts buried in plaster and brick. We cut proper access, repair, and seal with removable panels for future service.
- Layered debris from coal soot through renovation dust. Gravity furnaces burned coal for decades before conversion. Gut rehabs added drywall dust, insulation fragments, and sawdust. The resulting accumulation restricts airflow and harbors mold in damp basements.
Pricing for Duct Repair & Sealing in Logan Square, IL
Here’s what honest pricing looks like for Logan Square’s market. These are the ranges we quote before work begins, and they’re the numbers on the invoice when we’re done.
| Service | Typical Range in Logan Square |
|---|---|
| Duct sealing (mastic, mechanical) | $280 - $450 |
| Flex duct repair / replacement | $180 - $340 |
| Metal duct repair (fabricated sections) | $350 - $650 |
| Duct insulation (basement trunk wrap) | $400 - $720 |
| Mastic sealant application (full system) | $450 - $780 |
| Air leak detection and repair | $220 - $480 |
What moves you within these ranges: accessibility (crawl space vs. full basement), extent of damage, whether asbestos inspection is needed first, and if we find additional leaks during camera inspection that weren’t visible from the start. We show you the camera footage. You decide what to address. And remember: $50 off any repair over $250, free second opinion on any written estimate you bring us, and a permanent 5% senior and veteran discount. Call (877) 502-3903 for an exact quote. Estimates are free.
We Also Serve Cities Near Logan Square
Our Duct Repair & Sealing in Logan Square coverage extends to Avondale, West Town, Belmont Cragin, and Irving Park. Same trucks, same technicians, same upfront pricing. If you’re in a bordering neighborhood and your ducts run through century-old masonry, we’ve probably worked on a building just like yours.
Serving Logan Square, IL - Our Local Coverage Area
We’re based in the Logan Square 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 Logan Square
Yes, we can usually correct uneven operation by adjusting or replacing the hardware, not the door itself. We recently repaired a pair of custom wood carriage doors on a Kedzie Boulevard greystone where the operator’s drive gear had stripped. We sourced a vintage-compatible Genie StealthDrive from our stock, integrated it with the homeowner’s smart-home system, and matched the original oil-rubbed bronze finish, preserving the door’s historic character while adding whisper-quiet operation. Call (877) 502-3903 to schedule a look.
Yes, insulating these trunks is exactly what we recommend for most Logan Square basements. The large-diameter galvanized steel common in pre-1930s two-flats loses significant energy and sweats condensation in summer. We wrap with formaldehyde-free fiberglass duct wrap or apply closed-cell foam where space allows, cutting heat loss and eliminating the moisture that feeds mold. Typical cost is $400-$720 for a two-flat basement trunk system. Call (877) 502-3903 for a free assessment of your specific layout.
Yes, jerky and loud operation usually indicates a mismatched operator, worn drive components, or binding in the rail system. We replace with properly sized belt-drive or direct-drive operators, smooth the rail alignment, and balance the door weight to the motor capacity. For home theater applications, we specify whisper-quiet units with vibration isolation. Most carriage door operator upgrades in Logan Square run $380-$620 installed. Call (877) 502-3903 to discuss your setup.
Yes, we install and repair smart-home integrated operators for carriage doors throughout Logan Square. We see a lot of DIY smart-home integrations that mismatch the door’s weight or spring tension, causing premature operator burnout and risking damage to custom wood panels. We specify operators rated for your door’s actual weight, integrate with your existing smart-home ecosystem, and ensure the safety sensors and auto-reverse functions meet current code. Call (877) 502-3903 to get it done right.
Yes, water-based mastic often fails within two years in Chicago’s climate. We use high-elasticity, solvent-based mastic formulated for temperature swings from below zero to summer humidity over 80%. It remains flexible and maintains adhesion through expansion and contraction cycles that destroy cheaper products. We guarantee our mastic application for the life of the duct system. Small touch-ups start at $180; full system re-sealing runs $450-$780. Call (877) 502-3903 and we’ll inspect what’s failing and quote the fix.
Written by Ray Dempsey, Owner at Bellows Air Duct & Vent Co., serving Logan Square and Chicago since 2012.