Fast, Reliable Duct Repair & Sealing Across Calverton
Duct repair and sealing in Calverton typically runs $180-$650 depending on whether we’re patching a single flex duct branch or resealing an entire original metal trunk system. Most Calverton jobs are completed in one visit, and our Duct Repair & Sealing in Calverton team can usually be there same-day or next-day.
We’ve been driving to Calverton since the early 1980s, back when the 20705 zip was still filling out with those late-60s split-levels and Colonials that now need our help most. Ray Castillo started Bellows Air Duct & Vent Co. in 1984, and we’ve learned every variation of duct system this neighborhood grew up with. The original sheet metal trunks. The flex duct additions from the 1990s kitchen remodel. The garage pass-throughs that mice found along University Boulevard. If you live in Calverton and your ducts are leaking air, blowing dust, or smelling musty, call (844) 685-6342. We’ll answer live, 24 hours a day.
Why Bellows Air Duct & Vent Co. Is Calverton’s Preferred Duct Repair & Sealing Company
Forty-two years in this trade means we’ve worked on Calverton homes through three generations of owners. The same split-level on Randolph Road that needed new flex duct in 1998 called us again in 2023 when the next owner found the same mismatched extensions failing. That’s the kind of repeat relationship we build.
Our technicians are background-checked, uniformed, and carry camera inspection gear on every truck. We show you the inside of your ducts before we quote and again when we’re done. No claim without proof. Our 90-Day Done Right Promise is stamped on every job in writing - if it’s not right, we return at no charge, no paperwork, no arguing.
Calls to our office reach a live person, not voicemail, not an app. Day or night. Calverton residents don’t click - they call, and we pick up.
Our Duct Repair & Sealing Services in Calverton
Duct Sealing with Mastic Sealant
Original sheet metal trunk lines in Calverton’s 1960s and 1970s homes were joined with tape that degrades after decades of expansion and contraction in unconditioned attics. We seal pinhole leaks and separated seams with professional-grade mastic sealant, brushed on thick and allowed to cure to a permanent flexible bond. A typical mastic sealing job for a Calverton split-level runs $280-$450. We camera-verify every sealed joint before we close the access.
Flex Duct Repair
This is where Calverton’s housing stock gets complicated. Those original metal trunks were often extended with flex duct during later remodels, and the mismatched materials don’t age at the same rate. We recently repaired a duct system on a 1970s split-level on Randolph Road where the original trunk line had been extended with two different flex duct types. One branch had a torn inner liner that was blowing insulation into the living room; we replaced it with R8-insulated flex duct and sealed all joints with mastic. Flex duct repair in Calverton typically costs $180-$340 per branch. Full replacement runs $320-$580 when the liner is collapsed or rodent-damaged.
Metal Duct Repair
The galvanized steel trunks in Calverton’s older Colonials and split-levels can last indefinitely if the seams hold. When they don’t, we patch small sections, replace rusted drops, or rehang sagging lines. Metal repair is more involved than flex work - expect $380-$650 for typical Calverton jobs. We always inspect the full run with our camera to find every weak point, not just the one that’s leaking now.
Duct Insulation Replacement
Calverton attics hit 140°F in July. Duct insulation installed even twenty years ago has often compressed, torn, or absorbed enough moisture to lose its R-value. We replace deteriorated wrap with fresh R8 insulation on flex lines and rigid board on metal trunks. Duct insulation work in Calverton runs $450-$780 for a typical system, depending on linear footage and attic accessibility. Proper insulation pays back fast when your AC isn’t fighting 140-degree attic air.
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 Calverton
Our trucks carry Nikro HEPA equipment and Honeywell media filters for jobs where air quality is the primary concern. We stock Aprilaire humidifier components and Abatement Technologies containment gear for Calverton homes needing full-system remediation. Parts are on the shelf, not on order. That means most Calverton repairs finish in a single visit, not two.
Common Duct Repair & Sealing Problems We See in Calverton Homes
- Mismatched flex duct extensions collapse or tear. The 1990s kitchen or basement remodel that added flex branches to a 1968 metal trunk often used lower-grade material than the original. In Calverton, we regularly find these liners have separated from the helix wire, blocking airflow and distributing fiberglass debris through the house.
- Original sheet metal trunks develop pinhole leaks at seams. Decades of summer heat and winter cold in unconditioned Calverton attics flex every joint. The old tape gives way. Mastic sealing restores the seal without replacing sound metal.
- Rodent nests in flex duct liners. Mice travel the University Boulevard and Randolph Road corridors seeking warmth. Attached garages and vented attics in Calverton’s split-levels provide easy access. We find nesting debris and dander inside flex ducts that requires section replacement, not just vacuuming.
- Musty odor from biological growth near Paint Branch. The DC metro’s summer humidity, combined with Calverton’s proximity to stream corridors, drives moisture into duct systems. Attic runs with compromised insulation or poor sealing become chronic mold harbors.
Pricing for Duct Repair & Sealing in Calverton, MD
We’re square dealers. The price we quote on the phone is the price on the invoice.
| Service | Typical Range in Calverton |
|---|---|
| Single flex duct branch repair | $180 - $340 |
| Flex duct branch replacement (R8 insulated) | $320 - $580 |
| Mastic sealing of metal trunk seams | $280 - $450 |
| Metal duct patch or section replacement | $380 - $650 |
| Duct insulation replacement (full system) | $450 - $780 |
| Camera inspection with written report | $89 - $149 |
Most repairs qualify for our $50 Off Any Repair Over $250. Seniors and veterans receive a permanent 5% discount. We also offer free second opinions on any written estimate you’ve already received - bring us the quote. Our $89 Seasonal Tune-Up catches small problems before they become the $600 repair.
Every estimate is free. No charge to look, no pressure to decide.
We Also Serve Cities Near Calverton
Our Duct Repair & Sealing crews work daily in Beltsville, Burtonsville, Fairland, and Hillandale. Same trucks, same technicians, same upfront pricing. If you’re in the 20705 zip or any neighboring community, we’ll be there when we say.
Serving Calverton, MD - Our Local Coverage Area
We’re based in the Calverton 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 Calverton
Repair works when the inner liner is intact and only the insulation wrap or outer sleeve is damaged. Replacement is necessary when the liner is torn, collapsed, or contaminated with rodent debris - conditions we find frequently in Calverton’s older split-levels with attic or garage pass-throughs. We camera-inspect to show you exactly which situation you have. Call (844) 685-6342 for a free look - estimates cost nothing.
Yes, in most cases. Original galvanized steel trunks in Calverton homes are often structurally sound; the failure is at the seams and joints where decades of thermal cycling have degraded the original tape. We brush mastic sealant onto every leak point and camera-verify the seal. Full replacement is only needed when the metal itself is rusted through or mechanically damaged. A typical Calverton metal trunk sealing runs $280-$450. We’ll tell you honestly if replacement makes more sense.
The combination of DC metro humidity - dew points in the low-to-mid 70s°F all summer - and Calverton’s proximity to the Paint Branch and Northwest Branch stream corridors creates ambient moisture that migrates into duct systems through small leaks. Attic runs with degraded insulation or poor sealing become chronically damp, supporting mold and dust mite allergen accumulation. The smell is biological growth, not ordinary dust. We locate the moisture entry point, seal it, and remediate affected sections. Call (844) 685-6342 - this problem worsens with time.
We do. Calverton attics reach extreme temperatures in summer, and compressed or torn insulation forces your HVAC to work against 140°F air. We replace deteriorated wrap with fresh R8 material on flex lines and rigid board on metal trunks. Full insulation replacement for a typical Calverton system runs $450-$780. Most jobs complete in one visit.
Crushed flex duct almost always needs replacement, not repair. The inner liner and insulation are permanently deformed, restricting airflow and creating turbulence that collects debris. We replace the damaged section with properly sized R8-insulated flex duct and seal all joints with mastic. A single crushed branch in Calverton typically runs $320-$580 to replace. We’ll also check whether the attic path needs better protection to prevent recurrence.
Ready to stop losing conditioned air and start breathing cleaner? Call Bellows Air Duct & Vent Co. at (844) 685-6342 for your free Calverton duct repair estimate. We’ll answer live, schedule at your convenience, and show up when we say. One honest price, shown before we start. Done right - and backed in writing for 90 days.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Calverton since 1984.