Fast, Reliable Duct Repair & Sealing Across Royal Oak
Duct repair and sealing in Royal Oak typically costs $280-$650 for most homes, with same-day or next-day scheduling available throughout the 48067, 48068, and 48073 ZIP codes. Our Duct Repair & Sealing team knows the tight basements and retrofitted trunk lines that come with Royal Oak’s postwar housing stock, and we carry the mastic, insulation, and flex-duct materials to finish most jobs in a single visit. Call (844) 685-6342 for a free estimate - we’ll be there when we say.
We’ve been driving to Royal Oak since 1984. We know the alley-load garages in the neighborhoods east of Woodward, the low-clearance basements under those 1950s Cape Cods, and the parking constraints around downtown that make timing matter. Our technicians are background-checked and uniformed, and a live person answers our phones 24 hours a day.
Why Bellows Air Duct & Vent Co. Is Royal Oak’s Preferred Duct Repair & Sealing Company
We’ve built our reputation in Royal Oak on showing up and doing what we said we’d do. Homeowners in the Catalpa Drive area, the neighborhoods near Royal Oak High School, and the bungalows south of 11 Mile Road call us back because the price on the phone matches the price on the invoice.
Our 90-Day Done Right Promise is stamped on every job. If something isn’t right, we return at no charge - no paperwork, no arguing. That’s been our standard since 1984.
Calls are answered by a live person, 24/7. Not a voicemail. Not an app. When your basement trunk is dripping condensation in March or your flex liner has collapsed in July, you reach someone who can dispatch a technician.
Most Royal Oak jobs are completed in a single visit. Our trucks carry Nikro and Abatement Technologies equipment, mastic sealant, foil-faced insulation, and replacement flex duct in common diameters. We don’t make two trips because we didn’t bring the right material.
Our Duct Repair & Sealing Services in Royal Oak
Mastic Sealant Application
In Royal Oak’s older homes, we see a lot of sealing jobs that were done with tape alone - tape that dried out and failed years ago. We apply professional-grade mastic to every accessible joint, collar, and seam. In the 1920s-1960s bungalows common around 48067, we often find original sheet-metal trunks with gaps at the plenum connection that tape simply can’t hold. Mastic remains flexible, fills irregular surfaces, and lasts the life of the duct. We show you the before-and-after on camera before we leave.
Flex Duct Repair
Flex duct in Royal Oak takes a beating. The tight basement clearances in these older homes mean flex runs get kinked, crushed, or torn where they pass through joist bays. But the bigger problem - one we’ve found repeatedly east of Woodward - is the flex liner that was stuffed inside original 1950s sheet-metal trunks during furnace upgrades. That creates a hidden cavity between old steel and new liner where debris and moisture collect. Standard inspection cameras look right past it. We know to check for it, and we know how to remove the liner and seal the original trunk properly.
Metal Duct Repair
Royal Oak’s original galvanized steel trunks are sixty-plus years old in many homes. We’ve replaced rusted sections near the humidifier tap, reattached sagging trunk lines in low-clearance basements, and reinforced plenum connections that have worked loose from decades of vibration. The metal itself is often sound - it’s the seams, collars, and transitions that fail. We repair what’s worth repairing and tell you straight when replacement makes more sense.
Duct Insulation
Uninsulated basement trunks are common in Royal Oak’s 48073 neighborhoods, and they cause real problems during southeast Michigan’s spring thaw. Cold metal in a humid basement sweats. That moisture feeds mold growth inside the duct, and it degrades any sealing work you’ve already had done. We wrap trunks with foil-faced insulation, seal the vapor barrier with mastic, and stop the condensation cycle. Done right - and backed in writing for 90 days.
What happens when you call
- 1
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 Royal Oak
We stock parts and materials from Honeywell, Aprilaire, and Abatement Technologies - the same brands serious HVAC contractors specify for southeast Michigan’s climate. For Royal Oak homeowners, that means faster turnaround because we’re not ordering parts from a warehouse across the state. When we find a failed Aprilaire filter housing or a Honeywell zone damper that’s stuck open, we replace it with what we carry on the truck. No waiting. No return visit.
Common Duct Repair & Sealing Problems We See in Royal Oak Homes
- Hidden leaks behind flex liners in retrofitted trunks. In Royal Oak’s older neighborhoods east of Woodward, technicians routinely find flex-duct liners stuffed inside original 1950s sheet-metal trunk lines. The gap between old steel and new liner traps debris and moisture, and standard cameras miss it entirely.
- Condensation on uninsulated basement trunks during spring thaw. Southeast Michigan’s freeze-thaw cycle creates humid basement conditions in March and April. Cold metal trunks sweat, mold follows, and any sealing compound applied to wet metal fails prematurely.
- Sealing compound applied only to accessible joints. Previous contractors often reach what’s easy and skip the joints behind finished basement ceilings or inside soffits. We use borescope cameras to find the leaks you can’t see.
- Undersized return trunks from forced-air retrofits. Many Royal Oak homes were converted from gravity “octopus” furnaces in the 1960s and 1970s. The original central plenums were oversized, but the new return trunks were often too small for modern blower capacity. That creates negative pressure that pulls attic or basement air into the system through every gap.
Pricing for Duct Repair & Sealing in Royal Oak, MI
Here’s what duct repair and sealing costs in Royal Oak’s market:
| Service | Typical Range in Royal Oak |
|---|---|
| Basic mastic sealing (accessible joints, single trunk) | $280-$420 |
| Flex duct repair or replacement (single run) | $340-$580 |
| Metal trunk repair (patch, collar, or section replacement) | $380-$650 |
| Trunk insulation (foil-faced wrap, per trunk) | $320-$490 |
| Hidden liner removal + trunk resealing | $520-$780 |
Three things move the number: how much of the ductwork is accessible without cutting into finished ceilings, whether we find the hidden flex-liner issue that requires extra labor, and the condition of the original metal. We inspect with a camera before we quote, and we show you what we see. The price we give is the price on the invoice. Our $50 Off Any Repair Over $250 offer applies to most of these jobs, and we always honor our permanent 5% Senior and Veteran discount.
Call (844) 685-6342 for a free estimate - we’ll camera-inspect your system and give you an exact number before any work begins.
We Also Serve Cities Near Royal Oak
Our technicians live and work throughout the northern Detroit suburbs. We regularly handle Duct Repair & Sealing in Royal Oak and the surrounding communities, including Madison Heights to the north, Southfield to the west, Troy to the northeast, and Warren to the east. Same trucks, same materials, same 90-Day Done Right Promise.
Serving Royal Oak, MI - Our Local Coverage Area
We’re based in the Royal Oak 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 Royal Oak
Royal Oak’s ducts are harder to seal because most homes were built between the 1920s and 1960s and later converted to forced-air, leaving non-standard trunk configurations, low-clearance basements, and hidden flex liners that newer construction simply doesn’t have. In Troy or Novi, you’re typically working with original, properly sized ductwork installed as a system. Here, we’re often repairing the compromises of a 1970s retrofit. Call (844) 685-6342 and we’ll show you exactly what you’re dealing with on camera.
The flex liner issue is a hidden cavity created when contractors stuffed flexible duct inside existing 1950s sheet-metal trunks during furnace upgrades, trapping debris and moisture between layers where standard cameras can’t see. On a Cape Cod on Catalpa Drive in 48067, we found a 1950s metal trunk with a collapsed flex liner trapping decades of debris between layers. We removed the liner, sealed a gap with mastic, insulated the trunk, and installed a new Honeywell Aprilaire filter housing to improve airflow and indoor air quality. If your home east of Woodward has had a furnace replacement since 1980, this is worth checking. Call for a free camera inspection.
We use mastic for permanent sealing and tape only as a temporary positioning aid during application. Mastic remains flexible, fills irregular surfaces, and lasts decades - critical in Royal Oak’s homes, where thermal expansion from our hard winters and humid summers works tape loose within a few years. The mastic we apply is rated for the temperature swings your attic and basement trunks see from October through April. Done right - and backed in writing for 90 days.
A typical Royal Oak bungalow takes four to six hours for standard mastic sealing and insulation, or a full day if we find hidden liner issues requiring removal and resealing. Most jobs are completed in a single visit. We work around your schedule, and we protect floors and furnishings because we know you’re staying in this house. Call (844) 685-6342 to book a morning or afternoon slot.
Yes, we access low-clearance basements regularly - it’s standard in Royal Oak’s 1920s-1960s housing stock, and our technicians are equipped with compact tools and flexible borescope cameras for tight spaces. The basement headroom in many 48067 and 48073 homes is under seven feet, with trunk lines mounted tight to the joists. We’ve been working in these conditions since 1984. If a section truly can’t be reached without cutting finished ceiling, we’ll show you on camera and discuss options before any work begins.
Ready to stop losing heated air into your basement and start breathing cleaner air? Call Bellows Air Duct & Vent Co. at (844) 685-6342 for a free estimate. We’ll camera-inspect your ductwork, explain what we find, and give you one honest price before we start. No bait coupons. No surprises on the bill. A square deal - the way we’ve done it for over 42 years.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Royal Oak since 1984.