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 North Dallas
Duct repair and sealing in North Dallas typically costs $280-$680 for most residential jobs, with full-system resealing in larger homes running $850-$1,400. Most inspections and repairs are scheduled within 2-3 business days, and every job starts with a written price before any work begins. Call (940) 290-8552 for a free estimate.
We’re familiar with the duct systems in North Dallas homes from Lake Highlands up through Preston Hollow and the Far North Dallas subdivisions along the LBJ Freeway belt. Our crews dispatch from our Dallas-Fort Worth office and carry the equipment to handle everything from separated flex-duct joints in 1970s ranch attics to cracked duct board seams in 1990s two-story brick homes. The housing stock here is different from what you’ll find in newer suburbs, and that difference matters for how we approach repairs.
Why CleanRun Air Duct Cleaning Frisco Is North Dallas’s Preferred Duct Repair & Sealing Company
CleanRun has served the broader Dallas-Fort Worth market since 2013, completing more than 52,000 jobs with a written price delivered before work started every single time. North Dallas homeowners make up a significant portion of our customer base, and the feedback we receive consistently points to the same decision factor: the documented photo record. When a homeowner in Preston Hollow or near the George Bush Turnpike can see the inside of every duct run before and after work, the conversation shifts from trust-me to show-me. That’s Haven Standard Clause 1 in practice.
Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. Scheduling and dispatch for North Dallas are coordinated from our Dallas-Fort Worth office, which means we’re not routing crews from distant hubs or guessing at local traffic patterns. We know the difference between a 1975 split-level near White Rock Creek and a 1992 two-story off the Dallas North Tollway, and we know what kind of duct systems each typically hides in its attic.
Every job carries the 365-Day Done Right Promise in writing. If the repair doesn’t hold, we make it right. No manager approval required, no runaround.
Our Duct Repair & Sealing Services in North Dallas
Duct Sealing
Most North Dallas homes we inspect have leaks that aren’t visible without a camera. The combination of expansive black clay soil and decades of thermal cycling opens seams in ways that smoke pencils and guesswork won’t catch. Our sealing process starts with a full inspection, then targeted sealing with mastic sealant - a water-based compound that remains flexible and bonds to duct board, metal, and flex-duct collars far better than foil tape alone. We apply it to every accessible seam and joint, then verify with a post-repair pressure test. A typical duct sealing job in North Dallas runs $280-$550 for a single-zone system, $650-$1,100 for multi-zone homes common in the larger Preston Hollow and Far North Dallas subdivisions.
Flex Duct Repair
Flex duct is the black corrugated tubing you’ll find in most North Dallas attics installed between the 1970s and 1990s. It’s lightweight and easy to install, which is why builders loved it. It’s also prone to sagging, kinking, and joint separation - especially after 30+ years of foundation movement and 140°F+ attic summers. We replace damaged flex-duct sections with new, properly sized runs, secure them with mechanical fasteners (not just zip ties), and seal every connection with mastic. Flex duct repair in North Dallas typically ranges from $180-$340 per run for accessible sections, with larger re-routing jobs in complex attics reaching $480-$720.
Metal Duct Repair
Some North Dallas homes, particularly the higher-end Preston Hollow builds and certain 1980s custom homes, use galvanized steel ductwork. Metal ducts don’t sag like flex, but their seams can separate and their interior liners can degrade. We repair separated seams with S-cleats and drive clips, then seal with mastic. Where liners have deteriorated, we recommend full section replacement rather than patchwork that will fail again. Metal duct repair in North Dallas generally runs $320-$580 for seam work, with section replacement at $450-$780 depending on accessibility and gauge.
Duct Insulation
Attic temperatures in North Dallas regularly exceed 140°F during summer months. Uninsulated or degraded duct insulation bleeds cooling capacity before conditioned air ever reaches a register. We install new foil-faced fiberglass insulation or closed-cell foam wrap depending on the application, with particular attention to flex-duct runs where the factory insulation has compressed or torn. Proper insulation after sealing can reduce cooling load by 15-25% in homes with significant attic duct exposure. Duct insulation in North Dallas typically costs $2.80-$4.50 per linear foot for standard R-6 wrap, with R-8 upgrade available for homes near the George Bush Turnpike corridor where summer peak demand is highest.
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.
BeforeAfterTrusted Brands We Service in North Dallas
Our equipment roster includes Nikro negative-pressure extraction systems, Honeywell media air cleaners and zone control components, and Aprilaire whole-home ventilation and humidity management products. We stock common repair parts - flex-duct collars, mastic, mechanical fasteners, R-6 and R-8 insulation wrap - so most North Dallas jobs don’t wait on a parts run. For specialized components in older systems, our Dallas-Fort Worth office maintains supplier relationships that typically turn around next-day delivery. You can verify every brand we name independently; we don’t use equipment we can’t document.
Common Duct Repair & Sealing Problems We See in North Dallas Homes
- Flex duct joints popped by seasonal foundation movement. North Dallas sits on expansive black clay (vertisol) that swells when wet and shrinks when dry. That seasonal heaving stresses attic framing enough to pull apart flex-duct connections. We regularly find completely separated joints blowing 55°F air into 140°F attics while pulling insulation fibers and superheated air back into bedrooms.
- Duct board seams cracked and shedding fibers. The fiberglass duct board installed in North Dallas homes from the 1960s through 1980s becomes brittle after decades of thermal cycling. Attic heat accelerates the breakdown. Our cameras show crumbling edges and visible fiber release that standard cleaning alone cannot address - sealing or replacement is required.
- Duct hangers loosened by foundation settling. Original wire or strap hangers in North Dallas attics lose tension as framing shifts. Sagging ducts kink, reducing airflow to distant rooms. The master bedroom at the far end of a 1980s two-story in Far North Dallas is often the first place homeowners notice the problem.
- Insulation degraded by sustained attic heat exposure. Factory-installed flex-duct insulation compresses and tears over time, especially where it contacts hot roof decking or is walked on during HVAC service calls. Bare duct surface in a 140°F attic is essentially a radiator working against your air conditioner.
Pricing for Duct Repair & Sealing in North Dallas, TX
We publish ranges because Haven Standard Clause 1 requires a written price before any work starts - and that price should never be a surprise.
| Service | Typical Range in North Dallas |
|---|---|
| Duct sealing (single-zone, mastic application) | $280-$550 |
| Duct sealing (multi-zone, whole system) | $650-$1,100 |
| Flex duct repair (per run, accessible) | $180-$340 |
| Flex duct repair (complex re-routing) | $480-$720 |
| Metal duct seam repair | $320-$580 |
| Metal duct section replacement | $450-$780 |
| Duct insulation (R-6 wrap, per linear foot) | $2.80-$4.50 |
| Full system inspection with photo documentation | $0 (included with any repair) |
What moves a job toward the higher end: multi-zone systems with 15+ duct runs, attics with limited access (steep pitch, blown-in insulation over decking), rodent damage requiring section replacement, or homes where previous DIY repairs have created code issues we need to correct. What keeps costs down: accessible attics, localized leaks, and scheduling during our standard booking windows. Every estimate is free, every price is written, and we offer a Free Second Opinion on any competitor’s written estimate - bring it in, we’ll put our number next to it.
We Also Serve Cities Near North Dallas
Our crews regularly travel to Frisco, Prosper, The Colony, and Little Elm for duct repair and sealing work. The housing stock differs - Frisco and Prosper are dominated by 2000s-2010s builds with newer flex-duct systems - but the fundamentals of proper sealing and documentation don’t change. If you’re in one of these areas, our Duct Repair & Sealing in North Dallas team can schedule you from the same dispatch office. Call (940) 290-8552.
Serving North Dallas, TX - Our Local Coverage Area
We’re based in the North Dallas 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 North Dallas
Every 3-5 years for homes with original duct board or pre-1990s flex duct, with sealing inspection every second cleaning cycle. The fiberglass duct board in North Dallas homes from the 1960s-1980s sheds fibers as it ages, and the seams open progressively under thermal stress - cleaning without inspecting for structural degradation misses the actual problem. Call (940) 290-8552 to schedule a camera inspection that shows what’s happening inside your specific system.
Yes, if the high bills stem from duct leakage - which our pressure testing can confirm or rule out. In North Dallas specifically, disconnected flex-duct joints and cracked duct board seams bleeding into 140°F attics force HVAC systems to run 20-40% longer to maintain setpoint. We documented this exact scenario in a 1978 Lake Highlands split-level: reconnection, mastic sealing, and insulation replacement dropped the home’s cooling runtime noticeably within one billing cycle. Not every high bill is duct-related, but we’ll show you the pressure-test numbers before recommending any work. Call (940) 290-8552 for a free inspection.
Three factors converge here: age of materials, soil type, and attic heat. North Dallas’s dominant housing stock was built with first-generation flex duct or fiberglass duct board that is now 30-50 years old - past its designed service life. The expansive black clay soil beneath these homes shifts seasonally, stressing attic framing and popping duct connections that newer homes on more stable ground don’t experience. And the prolonged 100°F+ cooling season degrades what’s left faster than in milder climates. Frisco and McKinney homes built after 2000 use improved materials and sit on different soil profiles; their duct problems tend to be installation errors, not systemic material failure. Our Duct Repair & Sealing team treats these as fundamentally different diagnoses.
Uneven cooling between rooms, dust accumulation on registers that returns after cleaning, and a sudden spike in summer electric bills without thermostat changes. In North Dallas specifically, the master bedroom at the far end of a long flex-duct run is often the first room to fail - the disconnected joint bleeds air into the attic while the room starves. You may also notice insulation fibers collecting in return air grilles, a sign the system is pulling attic air backward through a breach. Our camera inspection locates the exact separation point without guessing. Call (940) 290-8552 to book.
It can, if the allergy triggers are entering through duct leaks. In North Dallas, the specific concern is oak pollen in spring, ragweed in fall, and the fine clay dust that penetrates attic spaces - all of which get pulled into supply air through disconnected joints or cracked seams. Sealing the duct system closes those entry points. That said, sealing alone won’t address pollen entering through windows, doors, or the return air pathway through the home itself. We photograph what we find so you can see whether the ductwork is your actual allergen source or a contributing factor among several. Call (940) 290-8552 for an inspection that shows the evidence.
Ready to see what’s actually happening in your ductwork? Call (940) 290-8552 for a free estimate. We’ll deliver a written price before any work starts, document every duct run with before-and-after photos, and back the repair with our 365-Day Done Right Promise in writing. No coupons, no per-vent games, no surprises - just documented work you can verify.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving North Dallas since 2013.