Whole-home duct cleaning
Dryer vent cleaning
Camera inspection
Sanitizing & deodorizingWhole-system duct and dryer vent check with before-and-after photos - you see exactly what came out of your vents
That "$99 whole-house special" is a bait ad - the real number appears once they are in your hallway, or the "clean" is a shop-vac at the register. We photograph the inside of your ducts before and after instead.
Trusted Air Duct Repair for Longmont Homeowners
Duct problems rarely announce themselves. What you notice instead is a room that never warms up, a rattle above the ceiling when the furnace kicks on, or a faint musty smell every time the blower starts. That’s where air duct repair in Longmont begins: with a diagnosis of what’s actually wrong inside the system, not a guess.
Our technicians have up to 10 years of experience working on residential ductwork, and they run contractor-grade equipment on every visit. Rotobrush brush agitation paired with Nikro HEPA extraction lets us contact and capture debris rather than push it around. Abatement Technologies filtration gear handles the heavier cases, including renovation fallout and musty systems. We repair what we find, on the same visit where the scope allows, and we put one flat price per system in writing before any work starts. You get before-and-after photos of your own ducts, not stock images.
Same-day repair is often possible in Longmont. Call (866) 361-9658. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday.
HVAC Duct Installation
HVAC Duct Installation means building the duct system that moves conditioned air through your home, whether that’s a brand-new run for an addition, a reconfiguration after a remodel, or replacing flex runs with something more durable. You need it when a room has never had proper airflow, when a previous installation left kinked or undersized runs, or when an addition was finished without extending the system. We design the layout around your equipment’s capacity, install sealed and insulated runs, and test airflow at the registers before we call the job finished. Typical HVAC duct installation in Longmont runs $1,200 to $4,500 for a partial system and $4,500 to $9,000 for a full home, depending on run count, attic or crawlspace access, and whether rigid or flex duct is specified. The written estimate sets the final price.
Layout and Load Planning
Duct sizing has to match what the furnace or air handler can actually move. We measure static pressure and check the equipment’s rated capacity before choosing run sizes, so the system doesn’t whistle at one end and starve the far bedrooms at the other.
Sealing and Insulation
Every joint we install gets sealed, and runs that pass through unconditioned attic or crawlspace get insulated to code. That’s where most of the money leaks out of a duct system in this climate, and it’s the cheapest part of an installation to get right the first time.
Styles & brands we work with
- Whole-home duct cleaning
- Dryer vent cleaning
- Camera inspection
- Sanitizing & deodorizing
Air Duct Replacement
Air Duct Replacement is the full removal and reinstallation of duct runs that have failed or can’t be salvaged, and it’s the right call when ductwork is crushed beyond repair, heavily contaminated, or built from materials that have broken down. You need it when a technician finds collapsed flex, duct board that has absorbed moisture, or a run that’s been taped and patched so many times it no longer holds shape. We remove the old runs, dispose of the material, and install new ductwork with sealed connections and proper support so it doesn’t sag. We also confirm the new runs match your equipment. Air duct replacement in Longmont typically runs $1,800 to $5,500 depending on how many runs are involved and how accessible the attic or crawlspace is. An exact figure comes from the written estimate after we’ve seen the system.
When Repair Stops Making Sense
If a run has lost its inner liner, is saturated with moisture, or has more patch than original material, repair just postpones the replacement. We tell you which category a run falls into rather than defaulting to the more expensive option.
Disposal and Cleanup
Old duct material comes out with us. We contain the work area while runs are removed, run Abatement Technologies filtration where contamination is present, and leave the space as clean as we found it.
Ductwork Repair
Ductwork Repair is the targeted fix for damage or failure in an existing system: disconnected joints, crushed sections, torn flex, failed mastic, and separated takeoffs at the plenum. You need it when a room gets weak airflow, when you hear whistling or rattling at a register, or when a technician inspecting the system finds a break that’s been leaking conditioned air into the attic. We repair what we find rather than flagging it and leaving. That means reconnecting and sealing joints, replacing damaged sections of run, re-supporting sagging duct, and confirming static pressure afterward so we know the fix actually restored airflow. Typical ductwork repair in Longmont runs $250 to $1,200 depending on how many breaks are found and how hard they are to reach. The written estimate sets the final price.
Finding the Leak
A duct system can lose a meaningful share of its air through gaps you’ll never see from the living room. We inspect runs end to end and check joints at the plenum, where the most common separations happen.
Sealing Methods
Mastic, mesh tape, and proper mechanical fastening hold a joint far longer than duct tape alone. We use materials rated for the temperature and location of each repair. This work often pairs with a full duct cleaning in Longmont so the system goes back together clean.
Duct Replacement
Duct Replacement covers the sections of your system that have reached the end of their service life and need new material rather than another patch. It’s different from a full system build: here we’re swapping out failed components, such as a crushed trunk line, a rusted plenum, or flex runs that have collapsed under their own weight. You need it when the ductwork no longer holds pressure, when condensation or pest activity has ruined a section, or when an older system is so inefficient that replacement costs less over time than repeated fixes. We assess the whole system before recommending it, replace only what’s failed, and seal the new sections to the sections we keep. Duct replacement in Longmont typically runs $900 to $3,800 depending on the number of runs and how much of the trunk is involved. The written estimate sets the final price.
Partial Versus Full Replacement
Most homes don’t need every run replaced at once. We identify which sections are failing and which have years left, then replace only the failed portions. If the whole system is compromised, we’ll say so plainly.
Materials That Last in This Climate
Longmont’s dry air and hot summers put duct material through real temperature swings. We choose products rated for the attic and crawlspace conditions we actually find, not the mildest spec on the shelf.
Ductwork Installation
Ductwork Installation is the work of extending or adding duct runs to serve spaces the existing system doesn’t reach, common after a basement finish, an addition, or a conversion of a garage or bonus room. You need it when a room has no supply register, when an existing register can’t keep up, or when you’re adding a mini-split or second system and need distribution built out. We map the new runs against your equipment capacity, install sealed and insulated duct, and balance airflow so the new space doesn’t steal from the rooms that already worked. Ductwork installation in Longmont typically runs $600 to $2,800 per extended zone, depending on distance from the plenum, access, and the type of duct specified. Your written estimate sets the final price before we begin.
Adding a Zone
A new zone needs more than a register and a length of flex. We size the run to the room’s load, seal it at the plenum, and verify the added run doesn’t drop pressure to the rest of the house.
Working Around Finished Space
Adding duct to a finished basement means finding a path that doesn’t cut through the middle of a ceiling. We plan routing before we cut anything, and we keep drywall openings to a minimum.
Brands We Service
We run Rotobrush brush-agitation systems because contact matters: the whips and brushes physically reach duct walls and dislodge what’s attached, then Nikro HEPA vacuum extraction captures it. We know where both systems wear and what to check after heavy use. Our Abatement Technologies filtration equipment covers the jobs where contamination is the main concern, from renovation dust to musty systems that need more than routine cleaning before they can be capped and sealed. Guardsman products round out our material lineup for sealing and system care.
On the upgrade side, we’re authorized to supply and install Honeywell and Aprilaire filtration and indoor air quality products, so a repair visit can end with better filtration than the system had before. Whether you have Rotobrush-cleaned ductwork, a Honeywell or Aprilaire unit we’re servicing, or any other make, we can help. One company diagnoses, cleans, repairs, and upgrades the system, so you’re not coordinating between contractors.
See the difference
Before
After
Before
After
Before
AfterSigns You Need a Pro Right Now
- Whistling or roaring at a register. A register that’s louder than the others usually means a restriction or a leak somewhere upstream. It gets worse over time and strains the blower.
- Uneven temperatures room to room. If one room is always cold and another always warm, the duct system is losing or misdirecting air. That’s a duct problem, not a thermostat problem.
- Dust settling right after cleaning. Fresh dust on surfaces shortly after you’ve wiped them points to a leak drawing attic or crawlspace air into the system. Sealing it fixes the source.
- Musty or dusty smell when the blower starts. Odor that appears only when air moves is coming through the ducts. It’s worth an inspection before the season turns.
- Visible damage in the attic or crawlspace. Torn flex, disconnected joints, or crushed runs are common finds in Longmont attics. A crushed run wastes energy every hour the system runs.
Our Process, Step by Step
- 1
Inspection and diagnosis. We look at the whole system, not just the register you called about: plenum, trunk, branch runs, and connections. We check static pressure and photograph what we find so you see the same thing we do.
- 2
Written scope and price. You get one flat price per system for the repair, agreed before any work starts. No per-vent pricing and no surprise additions once the technician is on site.
- 3
Containment and cleaning. Where contamination is present, we set up Abatement Technologies filtration. Rotobrush agitation and Nikro HEPA extraction remove debris from the runs we’re working on, so repaired duct goes back together clean.
- 4
Repair or installation. We reconnect, seal, replace, or extend as the scope calls for, using materials matched to the location. New runs get insulated and supported so they hold shape.
- 5
Verification and photos. We recheck airflow and pressure after the work, then hand you before-and-after photos of your own ducts. If filtration or an IAQ upgrade makes sense, we’ll show you Honeywell and Aprilaire options.
How Much Does Air Duct Repair Cost in Longmont?
Air duct repair in Longmont typically runs $250 to $1,200, with most single-point repairs landing in the lower half of that range. Replacement work sits higher because it involves removing and reinstalling runs. Here’s how the common scenarios break down.
- Single disconnected joint or torn flex: $250 to $500
- Multiple leak points across the system: $500 to $1,200
- Partial duct replacement (a few runs): $900 to $3,800
- Full air duct replacement: $1,800 to $5,500
- New ductwork installation for an added zone: $600 to $2,800
Several things move the number. Access is the big one: a repair reachable from a walkable attic takes far less time than one buried under insulation in a tight crawlspace. The number of breaks matters too, and so does the material. Replacing a run of flex is quicker than rebuilding rigid trunk line. Longmont’s attic temperatures swing hard between seasons, which is one reason duct material degrades here faster than homeowners expect, and it’s worth knowing that when you’re deciding between a patch and a replacement.
To avoid overpaying, ask for the scope in writing before work begins and make sure the price covers the whole system rather than each vent. A quote that starts low and grows once the technician is inside your attic is the pattern to watch for. Our estimate is free, we give you one flat price per system, and it’s set in writing before we start. If we open up the system and the scope changes, you hear about it before we proceed, not after.
Our Service Area Near Longmont
We serve homeowners throughout Longmont and the surrounding northern Front Range, including Longmont, Boulder, Thornton, Westminster, Arvada, Greeley, Berkley, Commerce City, Fairmount, and Timnath. Scheduling follows availability, and same-day repair is often possible for calls placed within dispatch hours. Fast dispatch from 7am to 7pm, Sunday through Friday.
Serving Longmont, CO – Our Local Coverage Area
We serve Longmont and nearby communities. Use the map below to see the area we cover. If you’re nearby, we can almost certainly help.
Frequently Asked Questions About Air Duct Repair in Longmont
Air duct repair is the process of fixing damage in your duct system, including disconnected joints, crushed or torn runs, failed seals, and sagging sections that no longer carry air properly. It’s different from cleaning, which removes debris from a functioning system. We handle both, and we often find repair needs during a cleaning inspection.
Most single-point repairs take two to four hours, including inspection, containment, and verification. Larger jobs involving multiple runs or partial replacement can run a full day. We give you a time estimate with the written scope so you can plan around it.
Typical repair costs range from $250 to $1,200, while replacement work runs $900 to $5,500 depending on scope. Access and the number of repair points drive most of the difference. Call (866) 361-9658 for an exact quote: estimates are free and the price is set in writing before work starts.
Yes. We supply and install Honeywell and Aprilaire filtration and indoor air quality products, and we service what we install. If your system already has one of these units, we can inspect and repair the ductwork around it without disturbing the setup. It’s part of moving from clean ducts to better air in a single visit.
Same-day repair is often possible in Longmont. We answer 24/7, and fast dispatch runs from 7am to 7pm, Sunday through Friday, closed Saturday. A call outside dispatch hours is booked into the next opening.
Workmanship coverage depends on the specific scope, and we spell it out in your written estimate. Ask us directly about the job you’re having quoted and we’ll tell you exactly what’s covered. We don’t quote coverage terms that aren’t in writing.
Clear access to the attic hatch or crawlspace opening, and move anything stored on top of it out of the way. Keep pets and children clear of the work area while we’re running the vacuum. Beyond that, you don’t need to do anything; we contain the area and clean up after ourselves.
Schedule Your Air Duct Repair Service in Longmont Today
If your ductwork is leaking, crushed, or just not delivering air where it should, we can take a look and tell you what it actually needs. One flat price per system, agreed before work starts, with before-and-after photos of your own ducts when the job is done. Call (866) 361-9658 for a free, no-obligation estimate. We answer 24/7. Fast dispatch from 7am to 7pm, Sunday through Friday. We’re insured and bonded, and we repair what we find.
Written by the team at Duct Cleaning Longmont.