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.
Before
After
Before
After
Before
AfterFast, Reliable Duct Repair & Sealing Across Fresno
Duct repair and sealing in Fresno, TX typically costs $280-$650 for most residential jobs, with flex duct repairs running toward the lower end and full-system mastic sealing with insulation replacement at the higher end. We dispatch crews to Fresno from our Houston coordination office, and most Fresno homeowners receive a written quote within 24 hours of calling. Our Duct Repair & Sealing team has worked the tract homes in Hunters Glen, the rural spreads off FM 521, and every subdivision in between - we know what fails here and why.
Fresno’s housing tells a specific story. Most homes went up between 1995 and 2015, built fast with flex duct in 140°F attics and plenum connections that relied on tape alone. That tape has cooked off by now. We’re not guessing - we document what we find with before-and-after photos of every run, and we put our price in writing before touching a single panel. Call (346) 421-3357 for a free estimate.
Why CleanRun Air Duct Cleaning Sugar Land Is Fresno’s Preferred Duct Repair & Sealing Company
We’ve served Fresno since our first jobs in the area in 2013, and the pattern hasn’t changed: tape fails, ducts disconnect, and conditioned air dumps into attics that never cool below 120°F in August. Our crews have photographed this exact failure in Ridgemont, Hunters Glen, and along the rural stretches near Mustang Bayou. The photo record goes to the homeowner. Every time.
Our 365-Day Done Right Promise applies in Fresno exactly as it does everywhere we work - Haven Standard Clause 5, written on every job, not subject to manager approval. If the mastic seal cracks or a clamp loosens, we return and make it right.
Haven Standard Clause 3 means verified crews: background-checked, uniformed, identified by name before arrival. No subcontractors. No day-labor surprises.
We also offer a Free Second Opinion on any written estimate from a competitor. Bring us another company’s scope and price. We’ll put our number next to it in writing, with line-item detail, so you can compare documented work against vacuum noise.
Our Duct Repair & Sealing Services in Fresno
Duct Sealing
Most Fresno homes lose 20-30% of conditioned air through leaks before it ever reaches a register. In the 1995-2015 tract homes that dominate this market, the leaks start at the plenum where tape has degraded in attic heat. Our duct sealing process begins with a pressure test to map every loss point, then we seal accessible joints with mastic sealant - a water-based compound that remains flexible where tape turns brittle. We seal collar connections, register boots, and longitudinal seams in hard duct. For Fresno homes with post-Harvey moisture damage, sealing comes before cleaning; otherwise we’re just moving mold spores through a leaky system.
Flex Duct Repair
Flex duct in Fresno attics faces thermal cycling that more northern climates never impose. The inner liner cracks. The insulation compresses. The wire helix corrodes where condensation pools. We replace damaged sections with new insulated flex, secure all connections with metal clamps (never tape alone), and support the runs with proper straps to prevent sagging. Sagging flex collects debris and restricts airflow - a common find in Fresno’s 2000s-era subdivisions where builders ran long unsupported spans to cut costs.
Metal Duct Repair
Older Fresno homes and custom builds sometimes use galvanized steel ductwork. Where we find rust-through at seams or separated drive cleats, we repair with metal patches, seal with mastic, and reinsulate. Metal duct holds up better than flex in attic heat but leaks just as readily at joints. We pressure-test after repair to confirm sealed.
Duct Insulation
In Fresno’s 80-90% humidity, sweating ducts are the norm where insulation has compressed or torn. Wet insulation breeds mold and reduces R-value, so your AC works harder to push 55°F air through a 140°F attic. We replace damaged insulation with new vapor-barrier-wrapped material, sealed at seams to prevent condensation migration. This matters especially for Fresno homes near the Brazos floodplain where ground moisture elevates baseline humidity year-round.
Mastic Sealant
Mastic is our primary sealant for all rigid duct joints in Fresno. Unlike foil tape, which degrades in UV and heat, mastic remains pliable and airtight across temperature swings. We brush-apply to a minimum 2-inch band at every joint, then verify with pressure testing. For homes with wood heat or rural dust loading, a mastic-sealed system prevents the fine particulate from bypassing filtration and entering living spaces through leak points.
Air Leak Repair
Disconnected runs, blown-out register boots, and corroded dampers - we find these weekly in Fresno attics. Each repair gets photographed, reconnected with mechanical fasteners, sealed, and tested. The photo record shows you exactly what was separated and how we fixed it.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
BeforeAfterTrusted Brands We Service in Fresno
Our equipment roster includes Rotobrush agitation systems for mechanical debris removal, Nikro negative-pressure extractors for source control, and Honeywell media filters and electronic air cleaners for post-repair air quality upgrades. We stock common flex duct diameters, mastic, and clamp hardware for Fresno jobs, so most repairs don’t wait on parts. Guardsman UV-C sanitizing units are available where microbial contamination requires treatment beyond mechanical cleaning. You can look up every brand we name - we don’t use equipment we can’t document.
Common Duct Repair & Sealing Problems We See in Fresno Homes
- Tape-only plenum connections have failed. In Hunters Glen and Ridgemont, we routinely find supply runs hanging free of the plenum, the original duct tape reduced to sticky residue. The conditioned air has been dumping into the attic for years. This isn’t a cleaning problem until it’s a repair problem.
- Harvey flood moisture never left the duct lining. Homes that took water in 2017 often have flex duct with contaminated insulation that wicks humidity from the attic. Cleaning alone won’t fix this - the compromised material has to come out and be replaced.
- Rural properties face accelerated dust loading. Unpaved roads and open land around Fresno generate fine particulate that overwhelms standard filtration. Wood heat adds creosote-laden dust. These systems need repair and sealing more often than suburban equivalents, and the cleaning interval stretches to every 2-3 years rather than the 5-year suburban standard.
- Sweating ducts from failed insulation. Gulf Coast humidity hits 80-90% even when it’s 95°F outside. Where insulation has torn or compressed at a flex duct elbow, condensation forms, saturates surrounding material, and feeds mold that the blower then distributes.
Pricing for Duct Repair & Sealing in Fresno, TX
Here’s what duct repair and sealing actually costs in the Fresno market:
| Service | Typical Range |
|---|---|
| Single flex duct repair/replacement | $280-$420 |
| Plenum reconnection with mastic seal (per connection) | $180-$290 |
| Full-system mastic sealing (up to 12 runs) | $480-$720 |
| Duct insulation replacement (per run) | $140-$220 |
| Outbuilding or detached structure sealing | $320-$580 |
| Post-Harvey contaminated flex duct replacement (partial system) | $650-$1,400 |
Factors that move price: accessibility of attic entry, extent of tape failure versus full disconnection, whether Harvey contamination requires material disposal, and rural location adding drive time. We put the exact price in writing before any work starts - Haven Standard Clause 1. No exceptions. Call (346) 421-3357 for your written estimate.
We Also Serve Cities Near Fresno
Our crews work Duct Repair & Sealing in Fresno and the surrounding communities: Missouri City to the north, Manvel to the east, Stafford to the west, and Sugar Land as our scheduling coordination point. Same written pricing, same photo documentation, same Haven Standard applies across the service area.
Serving Fresno, TX - Our Local Coverage Area
We’re based in the Fresno 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 Fresno
Rural Fresno properties with unpaved road exposure and wood heat need Fresno Dryer Vent Cleaning and duct cleaning every 2-3 years, not the 5-year interval typical of suburban tract homes. The dust loading from road traffic and pollen from open land overwhelms standard filtration, and wood combustion particulate is finer and more adhesive than typical household dust. Sealing leaks first prevents this debris from bypassing filters through disconnected runs. Call (346) 421-3357 and we’ll assess your specific dust loading and set a realistic maintenance interval.
Because tape-only plenum connections from 1995-2015 construction have failed in attic heat, and disconnected runs are dumping air into the attic instead of through the registers. Cleaning a disconnected duct just polishes the debris inside a pipe that isn’t connected to anything. We find this in Hunters Glen and Ridgemont on the majority of initial inspections. Our field vignette: we were called to a home in Ridgemont after the homeowner noticed dust blowing from registers every time the air handler cycled; camera inspection showed a supply run that had come completely off the plenum, with tape remnants hanging in the attic heat. We reconnected the run with metal clamps, sealed the collar with mastic, and used negative pressure with HEPA filtration to source-remove the debris that had been dumping into the attic for years. The photo record showed the disconnect, the repair, and the cleaned run - standard documentation on every CleanRun job.
Yes. A large share of Fresno homes took on floodwater during Hurricane Harvey, and contaminated moisture wicked into duct systems that were never properly remediated. That moisture feeds mold colonies when flex duct sweats in 80-90% humidity. Cleaning alone won’t fix this - the compromised insulation and liner need replacement, and the system needs sealing to prevent recontamination. We document flood damage with photos and specify replacement versus cleaning in our written scope. Call (346) 421-3357 for an inspection if your home took water in 2017.
MERV 11 is our standard recommendation for sealed Fresno systems - high enough to capture pollen, mold spores, and fine road dust without restricting airflow in the 10-11 month cooling season. MERV 13 and above can strain older air handlers in this climate. After sealing, your system actually maintains the pressure differential the filter needs to work, so you get the rated performance instead of bypassed unfiltered air through leaks. We specify the right filter for your equipment in our written job record.
Yes. We seal ductwork in workshops, barns with converted living space, and detached garages with HVAC runs. Rural outbuildings often have exposed flex duct or uninsulated metal that fails faster than main-house systems due to temperature extremes and neglected maintenance. The same mastic sealing, clamp reconnection, and photo documentation applies. Drive time to rural Fresno properties is factored into our written quote upfront - no surprise travel charges. Call (346) 421-3357 for an exact quote on outbuilding work.
Ready to see what’s actually happening in your attic? Call (346) 421-3357 for a free written estimate. We’ll photograph what we find, put our price in writing before any work starts, and back the repair with our 365-Day Done Right Promise.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Fresno and Fort Bend County since 2013.