Fast, Reliable Duct Repair & Sealing Across Lafayette
Duct repair and sealing in Lafayette typically runs $180-$650 depending on whether we’re patching a single flex-duct joint or rebuilding a rusted sheet-metal trunk line, and most jobs are completed in a single visit. If you’re noticing weak airflow, dust pouring from vents, or utility bills climbing without explanation, your ductwork is likely leaking conditioned air into your crawl space or attic. Call us at (844) 685-6342 - we answer live, 24 hours a day, and we’ll give you an upfront price before any work begins.
We’ve been driving out to Lafayette from our Denver-Boulder service corridor for decades, and we know the local housing stock cold: the vintage bungalows near Simpson Street with their original galvanized trunk lines, the 1980s subdivisions off Baseline Road with flex duct that’s hitting its expiration, and the crawl-space foundations that seem to collect every agricultural dust particle the eastern Boulder County farm belt can generate. Our technicians carry the equipment to repair metal, flex, and hybrid systems, and we camera-inspect every job before and after so you see exactly what was wrong and exactly what we fixed.
Why Bellows Air Duct & Vent Co. Is Lafayette’s Preferred Duct Repair & Sealing Company
We’ve been serving Colorado homeowners since 1984 - over 42 years - and Lafayette has been part of our route map since the beginning. Ray Castillo, who leads our company, built Bellows on a simple standard: one honest price shown before we start, work backed in writing for 90 days, and no arguing if something needs a second look. That standard hasn’t changed.
Our Lafayette customers tend to be longtime homeowners, not flippers. They’ve lived in the same house for twenty or thirty years, they’ve been burned by a low-bid contractor who disappeared, and they want the job done right so they never think about it again. They call. We pick up. A live person, not a voicemail tree, not an app.
Our response time to Lafayette is typically same-day or next-day, and our technicians are background-checked, uniformed, and equipped with professional-grade tools from Rotobrush, Nikro, and Abatement Technologies. Every repair is camera-documented before and after, and our 90-Day Done Right Promise means if it’s not right, we return at no charge - no paperwork, no runaround. We also offer $50 off any repair over $250, a free second opinion on any written estimate you bring us, and a permanent 5% discount for seniors and veterans.
Our Duct Repair & Sealing Services in Lafayette
Metal Duct Repair
Lafayette’s older homes, particularly along the Simpson Street corridor, retain original sheet-metal trunk lines from the 1920s through the 1950s that simply don’t match modern flex-duct fittings. These galvanized runs are prone to seam separation, rust perforation, and damage from decades of vibration. We repair them with custom-fabricated metal patches, mastic sealant, and fiberglass mesh reinforcement - preserving the original sizing and airflow characteristics rather than forcing an ill-fitting replacement. On a 1940s craftsman near Simpson Street, we found a legacy sheet-metal trunk line with a split seam that was drawing crawl-space dust into the supply registers. We sealed the seam with mastic, reinforced it with fiberglass mesh, and re-insulated the exposed sections, restoring the system’s integrity without replacing the entire run.
Duct Sealing & Mastic Sealant
The 1980s and 1990s tract subdivisions throughout Lafayette - think areas north of Baseline and east of Public Road - are now hitting 30 to 40 years on their original flex-duct systems. The mastic seals at joints and plenum connections have dried, cracked, and failed, dumping heated or cooled air into crawl spaces before it ever reaches your rooms. We remove the old brittle sealant, clean the mating surfaces, and apply fresh professional-grade mastic with fiberglass mesh backing, then pressure-test to verify the seal holds. A typical mastic resealing job on a Lafayette split-system home runs $280-$450.
Flex Duct Repair
Flex duct in Lafayette’s crawl-space foundations takes a beating. Rodents exploit gaps in foundation vents, the thin plastic inner liner gets punctured by nails or settling joists, and the insulation wrap compresses over time. We replace damaged flex runs with properly sized new material, secure it with mechanical fasteners rather than duct tape (which fails in Colorado’s dry climate), and seal all connections with mastic. Most flex-duct repairs in Lafayette fall between $180-$340 per run.
Duct Insulation
Lafayette’s semi-arid Front Range climate at roughly 5,200 feet, combined with frequent strong Chinook downslope winds off the Rockies, creates temperature swings that punish uninsulated or deteriorated ductwork in attics and crawl spaces. When warm moist air hits cold metal during a sudden Chinook drop, condensation forms, inviting mold and rust. We install foil-faced fiberglass insulation or closed-cell foam wrap on exposed metal and flex runs, with particular attention to attic installations where temperature differentials are most severe. Duct insulation work in Lafayette typically ranges $320-$580 depending on linear footage and access difficulty.
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 Lafayette
We specify professional-grade equipment and materials from Rotobrush, Nikro, and Abatement Technologies - the same brands serious HVAC contractors use, not the consumer-grade products you find at big-box stores. For Lafayette homeowners, this means we carry the right mastic compounds, fiberglass mesh, metal stock, and insulation wraps to complete most repairs without waiting on special orders. Our trucks are stocked for same-day completion, and if we do need to source a specialty item for a vintage system, our supply relationships in the Denver-Boulder corridor mean fast turnaround.
Common Duct Repair & Sealing Problems We See in Lafayette Homes
- Failed mastic seals on 30-40 year old flex duct joints in 1980s subdivisions. The original sealant has dried to a powder, allowing conditioned air to leak into crawl spaces. Homeowners notice cold floors in winter and rooms that never reach set temperature.
- Rodent damage to return-air chases in crawl-space foundations. Mice and squirrels chew through flex duct and nest in the insulation, creating bypass paths that pull unfiltered crawl-space air directly into the furnace. We regularly find this in Lafayette homes with gravel-crawl foundations.
- Deteriorated insulation on metal ducts in unheated attics. The Chinook winds that sweep Lafayette create rapid temperature fluctuations. When attic duct insulation compresses or tears, cold metal surfaces condense moisture during spring and fall shoulder seasons, accelerating rust and mold.
- Post-wildfire contamination from the December 2021 Marshall Fire. Though the fire burned adjacent Superior and Louisville, smoke and ash infiltration reached Lafayette HVAC systems. Homeowners who sheltered in place or returned to smoke-saturated homes still face lingering particulate in ductwork that standard cleaning alone won’t address - damaged seals and compromised filters need repair and replacement.
Pricing for Duct Repair & Sealing in Lafayette, CO
We don’t do bait pricing. The number we give you on the phone is the number on the invoice, and we disclose it before a single tool is lifted.
| Service | Typical Range in Lafayette |
|---|---|
| Single flex-duct joint resealing (mastic) | $180-$280 |
| Flex-duct run replacement (per run) | $220-$340 |
| Metal trunk line seam repair with mastic/mesh | $280-$420 |
| Custom metal patch fabrication and install | $350-$550 |
| Duct insulation wrap (per linear foot) | $12-$18 |
| Full system inspection with camera documentation | $89-$129 |
What moves the price: accessibility (crawl space vs. attic), extent of damage, whether we’re matching vintage sizing, and whether contamination remediation is needed. We offer free estimates - call (844) 685-6342 and we’ll give you a firm quote. Remember, we provide $50 off any repair over $250, and a free second opinion if you have another company’s written estimate.
We Also Serve Cities Near Lafayette
Our Duct Repair & Sealing in Lafayette service extends throughout eastern Boulder County. We regularly work in Louisville, where Marshall Fire damage patterns mirror Lafayette’s; Erie, with its mix of new construction and aging ranch homes; Broomfield, where subdivision flex-duct systems are showing similar 30-year failure modes; and Boulder, with its own legacy housing stock and stricter energy-code requirements for duct sealing. If you’re in 80026 or any surrounding ZIP, we’re your local crew.
Serving Lafayette, CO - Our Local Coverage Area
We’re based in the Lafayette 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 Lafayette
The December 2021 Marshall Fire drove severe wildfire smoke and ash infiltration into HVAC systems across Lafayette, even though the flames stopped short of city limits. Homeowners who sheltered in place or returned to smoke-saturated homes often have contaminated duct seals, compromised flex-duct liners, and overloaded filters that standard cleaning won’t fix - the physical damage to seals and materials requires repair or replacement. If your home was exposed to smoke during that event and you haven’t had ductwork inspected since, call (844) 685-6342 for a camera inspection and we’ll show you exactly what survived and what didn’t.
That distinctive fine reddish-tan dust is agricultural particulate from the dryland farms and grassland corridors east of Lafayette, blown in on Chinook winds and drawn into your return-air system through any gap or failed seal. It accumulates faster than typical suburban dust because of Lafayette’s position adjacent to active Boulder County farmland. The dust itself is a visible symptom of duct leakage - if you’re seeing it inside, your system is pulling unfiltered outside air. We find and seal those entry points, then clean what’s made it inside. Call for a free estimate.
Yes, and we specialize in it. The original sheet-metal trunk lines in Lafayette’s Simpson Street-area bungalows and craftsmans use vintage sizing and fabrication methods that don’t match modern flex-duct components. We custom-fabricate metal patches, seal with mastic and fiberglass mesh, and preserve the original airflow design rather than forcing an ill-fitting retrofit. A typical metal repair on a vintage Lafayette system runs $350-$550. We’ll inspect with a camera and give you an exact quote before starting.
The 1980s and 1990s subdivisions throughout Lafayette are hitting 30-40 years of service life on original flex duct. The plastic inner liner becomes brittle, the insulation wrap compresses or gets damaged by rodents, and the mastic seals at joints dry out and crack. Crawl-space foundations common in Lafayette add moisture and rodent exposure that accelerates deterioration. Most flex-duct repairs or replacements in these neighborhoods run $220-$340 per run and are completed in one visit. Call (844) 685-6342 for a free inspection.
Yes, particularly for attic and crawl-space ductwork. Lafayette’s 5,200-foot elevation and frequent Chinook wind events create rapid temperature swings that cause condensation on cold metal surfaces and heat loss that your furnace works overtime to overcome. Proper insulation pays back through lower utility bills and prevents the moisture damage that leads to rust and mold. Duct insulation in Lafayette typically costs $320-$580 depending on footage and access, and we back it with our 90-Day Done Right Promise. Call for an exact quote - estimates are free.
Ready to stop losing heated and cooled air to your crawl space or attic? Call Bellows Air Duct & Vent Co. at (844) 685-6342. We’ll answer live, schedule you same-day or next-day, and give you an honest upfront price before we start. Our 90-Day Done Right Promise means we stand behind it - no paperwork, no arguing. That’s been our standard since 1984.
Written by Ray Castillo, Owner at Bellows Air Duct & Vent Co., serving Lafayette since 1984.