Fast, Reliable Duct Repair & Sealing Across Lanham-Seabrook
Duct repair and sealing in Lanham-Seabrook typically costs $180-$650 depending on whether you’re patching a torn flex run or sealing an entire metal trunk, and most of our Duct Repair & Sealing jobs are completed in a single visit. We know the 20706 area well - from the mid-century ranches along Greenbelt Road to the split-levels near Seabrook Station - and we carry the parts to fix older ductwork that many newer companies won’t touch.
We’ve been serving Prince George’s County homeowners since 1984. Ray Castillo and our team answer calls live, 24 hours a day, and we dispatch background-checked, uniformed technicians who arrive when we say they will. If your registers are blowing dusty air, your crawl space ducts have gone soft, or your 1970s retrofit system is leaking conditioned air into the attic, we’ll show you exactly what’s wrong with a camera inspection, quote one honest price before we start, and back the work with our 90-Day Done Right Promise. Call (844) 685-6342 for a free estimate.
Why Bellows Air Duct & Vent Co. Is Lanham-Seabrook’s Preferred Duct Repair & Sealing Company
Homeowners in Lanham-Seabrook call us because we’ve fixed the same duct problems they’re facing - in the same houses, built the same way, with the same aging materials. Over 42 years, we’ve repaired ductwork in hundreds of 1950s-1970s homes across 20706, and we know which retrofit systems were done well and which were cobbled together when central AC first arrived.
Our reviews from Lanham-Seabrook customers consistently mention two things: we show up on time, and we don’t change the price at the door. That’s not an accident. It’s how Ray Castillo built this company - no bait coupons, no scare tactics, just a square deal with the price shown before we lift a single tool.
Response time to Lanham-Seabrook is same-day or next-day for most calls. We stock flex duct, metal fittings, mastic sealant, and insulation wraps on every truck, so we’re not making a supply run while your house sits open. And because we know the local housing stock - the ranchers near Goddard, the colonials off US Route 1, the split-levels tucked behind Seabrook Road - we diagnose faster and fix it right the first time.
Our Duct Repair & Sealing Services in Lanham-Seabrook
Duct Sealing
Sealing is the fastest way to stop conditioned air from bleeding into your crawl space or attic. In Lanham-Seabrook, we see the worst leaks in 1970s retrofit systems where contractors cut corners on joint connections, and in original metal ducts that have worked loose after sixty years of thermal expansion. We use mastic sealant - not duct tape, which fails in humid crawl spaces - and we verify every seal with a camera inspection. A typical duct sealing job in Lanham-Seabrook runs $280-$450 for a partial system, or $550-$850 for a full trunk-and-branch seal.
Flex Duct Repair
Flex duct in Lanham-Seabrook’s crawl spaces doesn’t last. The 20706 climate kills it. Summer humidity exceeds 80%, condensation pools inside the liner, and pests tear the soggy material looking for nesting spots. We’ve pulled out flex duct in Seabrook homes that was shedding fiberglass into the airflow and losing 40% of its air before it reached the register. We repair isolated tears when possible, but we often recommend replacing damaged runs with new insulated flex or upgrading to metal in problem areas. Flex duct repair in Lanham-Seabrook typically costs $180-$340 per run; full replacement runs $320-$580 depending on length and access.
Metal Duct Repair
Original 1960s metal ducts in Lanham-Seabrook are built to last, but the seams and joints weren’t. We see rusted-out sections where condensation collected, disconnected collars where vibration worked screws loose, and patches from decades of amateur fixes. Our technicians repair metal duct with proper sheet-metal fittings, seal all joints with mastic, and reinforce weak spans. Metal duct repair in Lanham-Seabrook generally runs $240-$520 depending on how many sections need attention and whether we need to fabricate custom fittings.
Duct Insulation
Uninsulated or degraded duct insulation is a hidden problem in Lanham-Seabrook’s retrofit systems. The 1970s AC additions often ran supply lines through attic chases that were never meant to carry 55-degree air in August. Without proper insulation, those lines sweat, drip, and grow mold. We install fresh insulation wraps or replace uninsulated sections with pre-insulated duct, stopping condensation and improving efficiency immediately. Duct insulation work in Lanham-Seabrook typically costs $300-$650 for a partial system, with full re-insulation running higher.
Mastic Sealant
Mastic is the only sealant we trust in Lanham-Seabrook’s humid conditions. Duct tape dries out and peels. Aerosol sealants don’t penetrate properly on heavily corroded metal. We brush on thick mastic at every joint, collar, and penetration, then let it cure to a flexible, permanent seal. It’s slower than taping. It costs more in labor. It lasts. We include mastic application as standard on every metal duct repair and sealing job we do in 20706.
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 Lanham-Seabrook
We repair and seal ductwork connected to all major HVAC brands, and we stock parts from Abatement Technologies, Rotobrush, and Nikro on every truck serving Lanham-Seabrook. That means when we find a collapsed flex duct under your crawl space or a rusted return plenum near the Beltway, we’re not ordering parts and making you wait. Most repairs are completed in a single visit. Our Rotobrush equipment handles the core cleaning that should follow any major duct repair - because sealing dirty ductwork just traps the problem inside.
Common Duct Repair & Sealing Problems We See in Lanham-Seabrook Homes
- Crawl-space flex ducts torn by pests or moisture. The 80%+ humidity in Lanham-Seabrook’s unconditioned crawl spaces softens flex duct liners, making them easy targets for rodents and insects. Standard tape repairs fail within months. We replace the damaged section and seal with mastic.
- Retrofit attic chases from 1970s AC additions lacking insulation. When central air came to Lanham-Seabrook’s 1950s-1960s homes, contractors often ran duct through attic spaces never designed for it. Without insulation, cold supply lines condense in summer, drip onto ceilings, and degrade rapidly. We insulate or reroute.
- Highway particulate deposits in near-Beltway homes. Properties within a half-mile of I-495 and US Route 1 draw measurable carbon and brake dust through outdoor HVAC intakes. We find gray-black deposits coating supply registers and clogging return plenums. Sealing the duct system and upgrading filtration stops the cycle.
- Original metal duct seams worked loose by decades of thermal cycling. Lanham-Seabrook’s shoulder seasons mean constant stop-start operation. Metal expands, contracts, and eventually separates at joints. The leaks are invisible but costly - we find them with camera inspection and seal them permanently.
Pricing for Duct Repair & Sealing in Lanham-Seabrook, MD
We’re upfront about pricing because we’ve seen what bait-and-switch looks like, and we don’t do it. Here’s what duct repair and sealing costs in the Lanham-Seabrook market:
| Service | Typical Range in Lanham-Seabrook |
|---|---|
| Flex duct repair (per run) | $180 - $340 |
| Flex duct replacement (per run) | $320 - $580 |
| Metal duct repair (per section) | $240 - $520 |
| Duct sealing (partial system) | $280 - $450 |
| Duct sealing (full system) | $550 - $850 |
| Duct insulation (partial) | $300 - $650 |
| Mastic sealant application | Included with repair/sealing |
Three factors move the price: access (crawl spaces take longer than basements), extent of damage (one torn run versus a whole system), and whether we find additional problems during our camera inspection. We show you everything on screen before we quote. No surprises on the bill. We also honor our standing offers: $50 off any repair over $250, free second opinion on any written estimate, $89 seasonal tune-up, and a permanent 5% senior and veteran discount. Call (844) 685-6342 for your free estimate.
We Also Serve Cities Near Lanham-Seabrook
Our technicians live and work in Prince George’s County, so Lanham-Seabrook isn’t a drive from somewhere else - it’s our territory. We also repair and seal ductwork in Goddard, New Carrollton, Seabrook, and Greenbelt with the same same-day or next-day response. The housing stock is similar. The problems are similar. Our approach is the same: camera inspection, upfront price, done right.
Serving Lanham-Seabrook, MD - Our Local Coverage Area
We’re based in the Lanham-Seabrook 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 Lanham-Seabrook
That’s highway particulate - carbon and brake dust drawn through your outdoor HVAC intake from nearby I-495 and US Route 1, a pattern we see consistently in Lanham-Seabrook homes within a half-mile of those corridors. The dust accumulates in your return plenum and gets blown back out through supply registers. We seal the duct system to reduce infiltration, clean the deposits with Rotobrush equipment, and recommend upgraded filtration. Call (844) 685-6342 for a free inspection - estimates are free.
Small, isolated tears can be repaired if the surrounding liner is still structurally sound, but in Lanham-Seabrook’s humid crawl spaces we often find the damage is more extensive than it first appears. Moisture weakens the entire run, and pest damage usually indicates multiple entry points. We camera-inspect the full length before recommending repair versus replacement. Most flex duct repairs in 20706 run $180-$340; replacement is $320-$580 per run. Call (844) 685-6342 and we’ll show you exactly what you’re dealing with.
Signs include rooms that never reach temperature, musty smells when the system runs, visible gaps at joint connections, and energy bills that climb without explanation. In Lanham-Seabrook’s 1970s retrofits, we commonly find unsealed collars where flex meets metal, and attic chases that leak conditioned air directly outside. Our camera inspection reveals the exact leakage points. Duct sealing typically runs $280-$450 for partial work, $550-$850 for a full system. Call (844) 685-6342 to schedule - estimates are free.
Yes, especially for uninsulated retrofit lines in attics or crawl spaces. In Lanham-Seabrook, the combination of humid summers and stop-start shoulder-season operation means cold supply lines sweat heavily without proper insulation. That condensation damages ceilings, breeds mold, and reduces system efficiency. Insulation pays for itself in prevented damage and lower energy bills. Partial re-insulation runs $300-$650. Call (844) 685-6342 for an assessment.
Usually, yes. Original metal duct in Lanham-Seabrook’s mid-century homes was built with heavier gauge material than what’s used today. The problem is almost always at the joints - screws worked loose, collars separated, amateur patches failing. We repair the damaged sections, replace missing hangers to stop rattling, and seal every joint with mastic. Replacement is only necessary if sections are rusted through or structurally collapsed. Metal duct repair typically runs $240-$520. Call (844) 685-6342 for a camera inspection and exact quote - estimates are free.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Lanham-Seabrook and Prince George’s County since 1984.