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 Fresno
Duct repair and sealing in Fresno, TX typically costs $280-$650 for most residential jobs, with flex duct boot repairs running $180-$340 and full-system mastic sealing ranging $400-$900 depending on accessibility and the number of runs involved. We dispatch crews to Fresno from our Houston coordination office, and most Fresno appointments are scheduled within two to three business days. Call (346) 251-8919 for a written estimate - we deliver the full price before any panel comes off, every time.
Our Duct Repair & Sealing team knows Fresno’s housing stock intimately. The community’s rapid buildout during Fort Bend County’s growth surge left thousands of homes with builder-grade flex duct that has never been professionally addressed since construction. That matters when you’re trying to figure out why your registers blow fiber dust or your upstairs rooms won’t cool.
Why CleanRun Air Duct Cleaning Houston Is Fresno’s Preferred Duct Repair & Sealing Company
We’ve served the Fresno market since expanding our Houston-area coverage, and the pattern here is distinct from neighboring communities. In Sugar Land’s mixed-vintage subdivisions, we see a wider variety of duct materials and installation quality. In Fresno, it’s remarkably consistent: early-2000s tract homes, flex duct run through unconditioned attics, and the same failure modes showing up again and again. That consistency lets us diagnose faster and quote more accurately.
Our technicians are background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and we identify each crew member by name before arrival. Every Fresno job concludes with a Documented Photo Record of every duct run, delivered as part of the standard job record - not an upsell, not a request. Since 2013, we’ve held this practice on every one of the 52,000+ homes we’ve served.
The 365-Day Done Right Promise backs every Fresno repair in writing: if the work is not right, we make it right. Not a policy subject to manager approval. A written guarantee.
We also offer a Free Second Opinion on any written estimate from a competitor. Bring us another company’s quote; we’ll put our number next to it in writing, no charge.
Our Duct Repair & Sealing Services in Fresno
Flex Duct Repair
Fresno’s flex duct systems are failing predictably after two decades in 140-160°F attics. The thermal stress degrades the inner liner, and the Beaumont clay beneath these slab foundations shifts enough to pull boot connections loose. On a 2004-built home off Crabb River Road, our techs ran a camera inspection and found the flex duct at the master-bath register boot had separated from the collar - attic insulation was visibly dusting the supply air, and the air handler was short-cycling because return ducts were starved. We reattached the boot, mastic-sealed the collar and adjacent joints, wrapped the sagging run with new insulation, and pressure-tested the branch; after the repair, static pressure dropped and the homeowner stopped seeing fiber dust at the registers.
Typical flex duct repair in Fresno runs $220-$480 per run, including boot reattachment, collar replacement if needed, and insulation wrap.
Air Leak Repair
Disconnected joints in Fresno attics don’t just waste energy. They create negative pressure that pulls attic air - insulation fibers, dust, roof-deck debris - directly into your living space. We pressure-test the system to locate leaks, then seal with mastic or mechanical fasteners depending on the joint type and accessibility. Most Fresno homes need four to eight joints addressed.
Air leak repair in Fresno typically ranges $280-$550 for standard residential systems.
Mastic Sealant Application
Mastic is the standard for durable duct sealing, not tape. Tape dries and fails in Fresno’s attic heat. We apply mastic to every accessible joint, plenum connection (the distribution box where your air handler connects to the duct branches), and register boot. The work is photographed before and after, and we pressure-test to verify the seal holds.
Mastic sealing for a full Fresno system runs $400-$900; partial sealing of problem branches runs $180-$380.
Metal Duct Repair
Some Fresno homes, particularly later builds near the Missouri City line, have galvanized metal trunk lines with flex branch takeoffs. We repair rusted sections, reseal seams, and replace damaged dampers. Metal work costs more - typically $450-$850 - but lasts decades longer than flex in attic conditions.
Duct Insulation Replacement
Condensation-soaked insulation is common in Fresno’s non-stop cooling season. Once the vapor barrier fails, the fiberglass mat traps moisture against the duct surface. We strip damaged wrap, treat any biofilm, and install new R-6 or R-8 insulation with intact vapor barriers. Insulation replacement runs $160-$320 per run.
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 Fresno
Our equipment roster includes Rotobrush for mechanical agitation in duct runs, Nikro for negative-pressure extraction systems, and Honeywell and Aprilaire components for register, damper, and filtration hardware. We stock common boot sizes, collar adapters, and mastic compounds for Fresno jobs, so most repairs don’t wait on parts. If your system uses Guardsman fittings or another trade-standard component, we source those too - and we name what’s going on the truck before we quote, so you can verify it independently.
Common Duct Repair & Sealing Problems We See in Fresno Homes
- Boot connections tearing loose from slab movement. The clay-heavy Beaumont soil shifts Fresno foundations enough to separate flex duct from collars. Homeowners notice fiber dust on registers or rooms that won’t hold temperature. The camera usually shows the gap before we touch anything.
- Condensation-soaked flex duct liner sagging in attics. Attic temperatures hit 140-160°F in Fresno summers, but the duct surface stays cool from conditioned air. The temperature differential drives moisture through degraded vapor barriers, and the liner sags into standing water that feeds microbial growth.
- Shared dryer-vent stacks in townhome rows. Dense Fresno developments often route dryer exhaust through a common vertical stack. Individual unit cleaning never reaches the lint packed above the second or third floor, creating a fire pathway that only full-stack access addresses.
- Return duct starvation from disconnected trunk connections. When a return duct pulls loose in the attic, the air handler can’t move enough volume. It short-cycles, runs longer, and drives up bills while rooms stay uncomfortable. Pressure testing finds it fast.
Pricing for Duct Repair & Sealing in Fresno, TX
We publish ranges because Haven Standard Clause 1 requires a written price before work starts - and that price has to be grounded in something real.
| Service | Typical Range in Fresno |
|---|---|
| Flex duct boot repair/reattachment | $180-$340 |
| Single run flex duct replacement | $220-$480 |
| Air leak repair (per joint, 4-8 typical) | $280-$550 |
| Mastic sealant, full system | $400-$900 |
| Mastic sealant, partial branch | $180-$380 |
| Metal duct repair/replacement | $450-$850 |
| Duct insulation replacement (per run) | $160-$320 |
What moves the number: attic accessibility ( Fresno’s tight truss spacing in some developments), the number of runs involved, whether we need to replace boots or just reattach, and whether pressure testing reveals additional leaks beyond the obvious failure. We photograph everything, explain what we found, and deliver the written price before any repair begins. No per-vent pricing. No coupon that balloons once the van is in your driveway.
Call (346) 251-8919 for a free estimate - we’ll schedule a camera inspection and give you a written number you can compare.
We Also Serve Cities Near Fresno
Our crews work Duct Repair & Sealing in Fresno and surrounding Fort Bend County communities including Missouri City, Stafford, Sugar Land, and Pearland. Each market has different housing stock and different failure patterns; we adjust our approach accordingly rather than apply a single template.
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
Fresno’s early-2000s build-out used builder-grade flex duct that was never professionally addressed post-construction, and the Beaumont clay soil shifts slab foundations enough to tear boot connections loose - a physical failure that cleaning cannot fix. The detached joints dump conditioned air into the attic and pull insulation fibers into your supply air, which is why many Fresno homeowners see dust at registers even after repeated cleanings. We find this pattern far more consistently in Fresno than in Sugar Land or Missouri City, where construction quality and soil conditions vary more. Call (346) 251-8919 for a camera inspection that shows whether you’re dealing with a cleanliness issue or a mechanical failure.
Yes, we can access and clean the full vertical stack in multi-unit Fresno townhome developments, which individual unit services cannot reach. The shared stack beyond the second floor typically packs with lint that creates a fire pathway through multiple units; our equipment includes extendable rods and high-torque brushes that navigate the full run from roof or utility-room access points. We document the before-and-after condition photographically and provide a written scope for property management if needed. Call (346) 251-8919 to discuss access arrangements for your specific building.
Attic temperatures of 140-160°F in Fresno degrade standard duct tape within months and accelerate mastic curing, which means our techs work with high-temperature-rated compounds and verify seal integrity after the material has set in actual conditions. The heat also makes attic work physically demanding, so we schedule Fresno repairs during morning hours when possible and bring adequate hydration and break protocols for crew safety. The same thermal stress that makes sealing harder is also why the sealing matters - every failed joint costs more to heat and cool in Fresno’s eight-to-ten-month cooling season. Call (346) 251-8919 to schedule morning-availability if your repair requires attic access.
Yes, our sealing protocols in Fresno multi-family buildings follow NADCA ACR guidelines for containment, pressure testing, and documentation, with additional H.A.V.E.N. Standard requirements for crew identification and photo records. We coordinate with property management for access to common mechanical areas, provide certificates of completion for building records, and ensure no sealant fumes enter occupied units during curing. Every apartment and condo job includes the same Documented Photo Record and written price guarantee as our single-family work. Call (346) 251-8919 for a scope review with your building management.
Yes, if the dust is fiberglass from degraded duct insulation or attic insulation pulled through disconnected joints - the most common source of visible fiber dust in Fresno homes. Mastic-sealing the boots and joints stops the negative pressure that draws attic air into the system, and replacing degraded liner insulation eliminates the source material. We verify the fix with post-repair camera inspection and pressure testing; the register dust typically clears within one to two filter cycles after the seal is complete. Call (346) 251-8919 for a camera inspection that identifies whether your dust source is a sealing issue or something else.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Fresno since expanding our Houston-area operations in 2013.