Whole-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.
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AfterFast, Reliable Duct Repair & Sealing Across Allen
Duct repair and sealing in Allen, TX typically costs $280-$780 for most residential jobs, with flex duct repairs running $180-$450 per run and whole-system mastic sealing ranging $400-$900 depending on accessibility. Our crews are dispatched from our Dallas-Fort Worth office and serve Allen homes directly, carrying the full Rotobrush and Nikro equipment roster needed for attic flex duct work on the large two-story homes that dominate this market. Call (469) 452-7766 for a written estimate before any work starts.
We’ve been in enough Allen attics to know the pattern. The city built fast between 1990 and 2010, and those subdivisions - Twin Creeks, Watters Crossing, the neighborhoods off Stacy Road and Exchange Parkway - are now full of homes whose original flex duct is 15 to 25 years old. That’s not old enough for wholesale replacement in most cases, but it’s exactly the age where sag points, micro-tears, and accumulated Collin County clay dust start showing up as rooms that won’t hold temperature. Our Duct Repair & Sealing team documents every run with before-and-after photography, and every price is written before a panel comes off.
Why CleanRun Air Duct Cleaning Plano Is Allen’s Preferred Duct Repair & Sealing Company
CleanRun has served Allen since our founding in 2013, and the documented photo records from those 52,000+ homes include hundreds of two-story tract homes in Collin County. Allen customers receive the same deliverable every time: a written scope, a written price under Haven Standard Clause 1, and a photo record of every duct run before and after work. No exceptions.
Our response to Allen is direct from the Dallas-Fort Worth dispatch office. Technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and they’re identified by name before arrival. The 365-Day Done Right Promise applies to every Allen job in writing, not as a verbal assurance.
We know the local building stock. Allen’s 2,500-4,500 square foot slab-on-grade brick homes with attic-run flex duct across multiple zones aren’t theoretical to us. We’ve measured the airflow drops in Twin Creeks second-floor bedrooms. We’ve traced the shared dryer vent stacks in Allen’s denser condo clusters. That specificity matters when you’re deciding whether a duct run needs repair, replacement, or targeted sealing.
Our Free Second Opinion policy applies here too. Bring a competitor’s written estimate for duct sealing or flex duct repair in Allen, and we’ll put our number next to it - in writing, before any work begins.
Our Duct Repair & Sealing Services in Allen
Flex Duct Repair
Flex duct repair is our most common call in Allen, and for specific reasons. The dominant housing stock here - large two-story homes built 1990-2010 with attic-installed flex duct - has developed a failure pattern we don’t see as concentrated anywhere else in Collin County. In Twin Creeks and Watters Crossing specifically, the second-floor trunk-and-branch flex runs are long enough that sag points form first on the upper-level branches, not in the main trunk. The failure is room-by-room upstairs, not whole-house. A homeowner notices the primary bedroom won’t cool below 82°F while downstairs holds 74°F, and a filter change does nothing.
Our repair protocol: camera inspection to locate the sag or separation, cut out the failed section, re-support the remaining run with proper strapping, and seal all connections with mastic sealant. We then run source removal with negative-pressure extraction (a vacuum system that pulls debris out while HEPA filtration captures it) to clear the compacted clay dust and pollen that accumulated in the low point. Every step is photographed. Typical flex duct repair in Allen runs $180-$450 per run depending on length and accessibility.
Duct Sealing
Duct sealing in Allen addresses the leakage that develops at plenum connections, wye fittings, and register boots after years of thermal cycling in 130-140°F attic temperatures. North Texas attic heat hardens duct tape adhesive and thermally stresses mastic that was applied during original construction. We seal with fresh mastic sealant and mechanical fasteners, not tape, and we pressure-test the system afterward to verify the seal. Whole-system mastic sealing for a typical Allen two-zone home runs $400-$900. We quote per system, not per vent, and the price is written before work starts.
Air Leak Repair
Air leak repair targets the specific points where conditioned air escapes into the attic or unconditioned space. In Allen’s large two-story homes with long duct runs, even a small leak at a plenum connection can bleed significant capacity over a 3,000-square-foot footprint. We locate leaks with smoke testing and thermal imaging, then repair with sealed mechanical connections and fresh mastic. Air leak repair is typically bundled with sealing work but can be quoted separately for targeted fixes.
Metal Duct Repair
Metal duct repair is less common in Allen’s residential stock than flex duct work, but we encounter it in older Plano-border homes and in some commercial applications near the Allen Premium Outlets corridor. Our crews carry the sheet metal tools and slip-joint fittings to repair galvanized trunk lines and custom-fabricate transitions where original ductwork has been modified.
Duct Insulation
Duct insulation replacement becomes relevant when the original fiberglass wrap on attic flex duct has compressed or moisture-damaged, which we see in Allen homes with past condensate issues or roof leaks. We install new insulation with proper vapor barrier orientation and seal all seams with mastic. Insulation work is quoted as an add-on to repair or sealing jobs, typically $150-$350 per run depending on diameter and length.
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.
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Our equipment roster includes Rotobrush and Nikro for source removal and negative-pressure extraction, plus Honeywell and Aprilaire components for air quality integration when duct repair reveals the need for upgraded filtration. We don’t make performance claims beyond manufacturer specifications, and we name these brands so Allen customers can verify what we’re using before agreeing to a price. Parts for common duct repair fittings are stocked for Collin County jobs, so we’re not ordering specialty items after the inspection.
Common Duct Repair & Sealing Problems We See in Allen Homes
- Second-floor flex branch sags in Twin Creeks and Watters Crossing. The specific two-story plans in these subdivisions used long attic branches to reach upper-floor bedrooms, and years of 130°F+ attic heat cycling have created low-point sags that trap Collin County clay dust and condensate. The result is a room that won’t cool evenly, often misdiagnosed as an HVAC capacity problem.
- Shared dryer vent stacks in Allen’s denser condo and apartment clusters. One resident’s lint blockage is often in the vertical chase shared with neighbors, not in the individual unit’s duct. A single-unit cleaning misses the real fire risk. We inspect the full stack path and coordinate access when needed.
- Restricted equipment access forcing improper negative-pressure setup. In Allen’s apartment communities with limited parking and long hose runs from truck to building, crews must set up negative pressure at the air handler correctly. If they don’t, source removal pulls attic dust back through registers instead of extracting it.
- Thermally degraded mastic at plenum connections from North Texas attic extremes. Original construction mastic in Allen’s 1990-2010 homes has endured 25+ summers of 130-140°F peak temperatures. It cracks. It separates. And because the leaks are in the attic, homeowners don’t see them - they just pay for the conditioned air that escapes there.
Pricing for Duct Repair & Sealing in Allen, TX
Here are the actual ranges we quote for Allen residential duct repair and sealing work. Every price is written before work starts, per Haven Standard Clause 1.
| Service | Typical Range in Allen |
|---|---|
| Flex duct repair (per run) | $180 - $450 |
| Whole-system mastic sealing (2-zone home) | $400 - $900 |
| Air leak repair (targeted, per location) | $120 - $280 |
| Duct insulation replacement (per run) | $150 - $350 |
| Camera inspection and written scope | $0 - $89 (waived with repair) |
What moves the price: attic accessibility (steep roof pitch vs. walkable), number of zones, extent of sag or separation, and whether we’re working around stored items. We don’t quote per vent because that’s how the industry hides the real total. One flat price per system, agreed in writing, before any panel comes off. Call (469) 452-7766 for an exact quote - estimates are free.
We Also Serve Cities Near Allen
Our crews work throughout Collin County and Dallas County from the Dallas-Fort Worth office. We also provide Duct Repair & Sealing in Allen neighboring communities including Plano, McKinney, Richardson, and Garland. Each city gets the same documented photo record and written pricing protocol.
Serving Allen, TX - Our Local Coverage Area
We’re based in the Allen 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 Allen
Because the problem is almost always a sag or separation in the second-floor flex branch, not a dirty filter. In Allen’s 1990-2010 two-story homes, the attic branches feeding upstairs rooms are long enough to develop low-point sags that trap debris and restrict airflow room-by-room. A filter change doesn’t reach that. We camera-inspect the branch, repair the sag, and restore airflow. Call (469) 452-7766 for an exact quote - estimates are free.
We can seal a targeted leak without full-system cleaning if the camera inspection shows the surrounding ductwork is clear. In Allen condos with shared building systems, we’ll inspect the accessible runs and quote only what’s needed. The price is still written before work starts, and we photograph the sealed connection. Call (469) 452-7766 for an exact quote - estimates are free.
We inspect the full vertical chase, not just the individual unit’s duct, because the blockage is often in the shared stack above or below the unit. In Allen’s denser apartment clusters, we coordinate building access when needed and document the full path with photography. If the blockage is in the shared section, we clear it and report the condition to property management. Call (469) 452-7766 for an exact quote - estimates are free.
Negative pressure creates a controlled vacuum inside the ductwork so that dislodged debris is pulled out through a collection hose rather than pushed into your living space. In Allen homes with long attic runs, proper negative-pressure setup at the air handler is critical - if it’s done wrong, the vacuum pulls attic dust back through your registers. Our crews use Nikro and Rotobrush equipment with HEPA filtration, and we verify the pressure differential before starting source removal. Call (469) 452-7766 for an exact quote - estimates are free.
Most 1990s flex duct in Allen is repairable if the liner isn’t brittle and the insulation wrap is intact. We camera-inspect to assess liner condition, then quote repair if the damage is localized (sags, separations, minor tears) or replacement if the liner is degrading throughout. Replacement of a full second-floor branch in a typical Allen two-story home runs $600-$1,200; repair is usually half that. We give you the camera footage and a written scope either way. Call (469) 452-7766 for an exact quote - estimates are free.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Allen and the Dallas-Fort Worth metro since 2013.