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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Before
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Before
AfterTrusted Duct Repair & Sealing for Schertz Homeowners
Duct repair and sealing in Schertz typically costs $180-$650 depending on whether you need a single flex duct run replaced or a full-system mastic seal, and most jobs are completed in a single visit with a written price agreed before any work starts. CleanRun Air Duct Cleaning Schertz has documented every duct repair with before-and-after photos since 2013, and our 365-Day Done Right Promise backs the work in writing, not as a verbal assurance.
We’re independently owned and operated under the Haven Standard, led by Tomas Reyes. Our crews have repaired and sealed ductwork in more than 52,000 homes, and every job begins with a written price delivered before a single panel comes off. That includes homes in Schertz neighborhoods like The Crossvine, Willow Grove, and Pecan Grove, where the clay-heavy soils and seasonal temperature swings put extra stress on flex duct runs in attics and crawl spaces. Call (830) 402-5110 for a free estimate with no obligation.
What Our Duct Repair & Sealing Service Includes
Duct Sealing
Duct sealing closes the gaps and cracks where conditioned air escapes your supply ducts or unconditioned air infiltrates your return path. In Schertz, we regularly find 15-30% air loss at joints and plenum connections in homes built during the 2015-2020 construction boom, where speed of installation often outpaced attention to detail. CleanRun seals these leaks with mastic compound and reinforced mesh tape, then verifies the improvement with a static pressure reading taken before and after the work.
Flex Duct Repair
Flex duct, the ribbed plastic tubing with fiberglass insulation that connects your main trunk to individual rooms, degrades faster than metal in Texas attics where summer temperatures exceed 140°F. We’ve replaced crushed, torn, and kinked flex duct in hundreds of Schertz homes, particularly in the older sections near FM 3009 where rodents and settling insulation have compromised the original runs. Every flex duct repair includes a new suspension strap system to prevent future sagging and a photo of the interior condition before we close the access.
Metal Duct Repair
Galvanized steel ductwork, common in homes built before 2005 and in commercial HVAC systems, can corrode at seams or separate at drive cleat connections. Our crews repair metal duct with slip joints and sealed rivets, then coat the repair with mastic to match the original airtight specification. In Schertz, we see this most often in homes near the Cibolo Creek basin where higher humidity accelerates corrosion in unconditioned spaces, and we also offer our Duct Repair & Sealing in Cibolo for similar conditions.
Duct Insulation
Insulation on ductwork prevents thermal loss as heated or cooled air travels through unconditioned zones like your attic or crawl space. When insulation falls away or gets compressed, you pay to condition air that arrives at the register at the wrong temperature. CleanRun replaces damaged insulation with formaldehyde-free fiberglass wrap or closed-cell foam, depending on the application, and photographs the full length of each duct run so you can verify complete coverage.
Mastic Sealant
Mastic is a thick, fiber-reinforced paste that remains flexible after curing, making it the professional standard for sealing duct joints and seams. Unlike foil tape, which can loosen with thermal cycling, mastic bonds to metal, flex duct, and insulation board to create a permanent seal. We apply mastic with a brush or trowel to every joint in the repair zone, then allow proper cure time before pressurizing the system for testing.
Air Leak Repair
Air leaks in ductwork force your HVAC system to run longer to achieve the thermostat setpoint, which shows up as uneven temperatures between rooms and higher utility bills. Our leak detection process uses a calibrated pressure pan and smoke pencil to locate leaks that aren’t visible to the eye, then we mark, photograph, and seal each one with the appropriate method for that duct type. Every air leak repair concludes with a post-repair pressure test documented in your job record.
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.
Brands We Service for Duct Repair & Sealing
We’ve worked on duct systems connected to Honeywell zoning panels, Aprilaire whole-home dehumidifiers, and Guardsman UV air purifiers, and we understand how these components integrate with your ductwork. A Honeywell zone damper that won’t close fully, for instance, often indicates duct pressure imbalance rather than a faulty motor, and our diagnostic process distinguishes between the two before recommending repair. We stock common fittings and adapters for these brands and can source OEM components when the original specification matters.
Whether your system includes Rotobrush cleaning ports, Nikro HEPA filtration, or any other make of HVAC equipment, we repair and seal the ductwork that connects to it. Our crews carry adapters for proprietary connection styles, and if we encounter a brand we haven’t serviced before, we document the specifications and add it to our reference library. Haven Standard Clause 1 requires a written price before work starts regardless of brand complexity, so you’ll never face a surprise charge for unfamiliar equipment.
BeforeAfterSigns You Need Duct Repair & Sealing Right Now
- Uneven temperatures from room to room. If your master bedroom in Schertz runs 8°F warmer than the hallway in summer, the duct run serving that room is likely leaking, blocked, or undersized. This isn’t a thermostat problem; it’s a distribution problem that duct repair can fix without replacing your HVAC unit.
- Dust accumulation immediately after professional cleaning. When ducts leak on the return side, they pull attic air laden with fiberglass particles and rodent droppings directly into your living space. If you’re dusting every two days despite recent home cleaning, the ducts are likely the pathway.
- Utility bills that climb without rate increases. A 20% duct leakage rate can increase heating and cooling costs by 30% or more, according to Department of Energy estimates. In Schertz’s climate, where air conditioning runs eight months of the year, that inefficiency compounds quickly.
- Whistling or rushing air sounds from registers. These noises indicate high velocity at the register, which usually means air is escaping before it reaches the terminal point. The system is working harder to deliver less conditioned air where you need it.
- Visible duct damage in attic or crawl space inspections. Crushed flex duct, disconnected joints, or insulation hanging loose are not cosmetic issues. Every gap you can see represents conditioned air you’re paying to cool your attic or heated air warming your crawl space.
Our Duct Repair & Sealing Process - Step by Step
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System assessment and pressure testing. We start with a visual inspection of accessible ductwork and a static pressure test at the air handler. This establishes a baseline and identifies whether the problem is leakage, blockage, or structural damage. The pressure reading goes in your written job record.
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Leak detection and documentation. Using a smoke pencil and pressure pan, we locate leaks in the supply and return systems. Each leak is photographed, marked with a numbered flag, and mapped to your floor plan so you can see exactly where your conditioned air is escaping.
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Written scope and price agreement. Before any repair begins, you receive a written scope of work with line-item pricing for each repair category. Haven Standard Clause 1 is absolute: no work starts until you’ve approved the price in writing. This is not an estimate that changes; it’s the price you’ll pay.
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Repair and sealing with professional-grade materials. Our crews use mastic sealant, reinforced mesh tape, and mechanical fasteners appropriate to each duct type. For flex duct replacement, we suspend new runs with proper strap spacing to prevent the sagging that caused the original failure. Equipment on every truck includes Rotobrush portable vacuums for debris removal and Nikro HEPA filtration for containment.
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Post-repair verification and photo record delivery. We repeat the static pressure test to confirm improvement, then photograph every repaired or sealed joint from multiple angles. Your documented photo record, including before images, after images, and pressure readings, is delivered as a standard part of the job file. The 365-Day Done Right Promise activates at this point, backed in writing.
How Much Does Duct Repair & Sealing Cost in Schertz?
A typical single flex duct run replacement in Schertz runs $180-$320 depending on length, attic accessibility, and whether the plenum connection also needs resealing. Full-system mastic sealing for a 2,000-square-foot home with accessible ductwork generally falls between $380-$650, while metal duct repair involving custom fabrication or multiple seam repairs can range from $450-$780.
Several factors move the price within these ranges. Attic temperature matters: crews can’t safely work in unventilated attics above 120°F, so summer jobs in Schertz sometimes require early-morning scheduling or temporary ventilation, which affects labor timing. The age of your ductwork matters too; older flex duct may be brittle and require more extensive replacement than initially visible. And the location of your air handler, whether in a closet, attic, or garage, determines how much of the system is accessible without cutting drywall.
The most common way Schertz homeowners overpay is accepting a per-vent or per-register price that balloons once the technician is in the home. CleanRun does not quote per-vent pricing. We price by the system and the scope of repair needed, with one flat price agreed before work starts. Every free estimate includes a written breakdown you can compare against any other quote, and our Free Second Opinion service puts our number next to a competitor’s in writing at no charge.
What’s included: the diagnostic pressure test, all materials and labor, the post-repair verification, and your documented photo record. There are no trip charges, no disposal fees, and no after-hours premiums for standard scheduling.
Duct Repair & Sealing Near Schertz - Our Service Area
CleanRun Air Duct Cleaning Schertz serves homeowners throughout the I-35 corridor and surrounding communities, including Duct Repair & Sealing in Cibolo and Duct Repair & Sealing in Universal City, plus Selma, Converse, Live Oak, Windcrest, New Braunfels, Terrell Hills, Alamo Heights, San Antonio, and Seguin. Most Schertz appointments are scheduled within a few business days, and our dispatch routes jobs by neighborhood to minimize drive time and keep crews efficient. Whether you’re in The Crossvine, Willow Grove, or the established streets near Schertz Parkway, your job is routed from our local base, not a distant call center.
Serving Schertz, TX - Our Local Coverage Area
We’re based in the Schertz area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Duct Repair & Sealing in Schertz
Duct repair and sealing fixes the physical pathways that move heated and cooled air from your HVAC unit to your rooms, closing leaks and replacing damaged sections so the air arrives where it’s supposed to. The work ranges from brushing mastic on loose joints to replacing entire flex duct runs that have collapsed or been chewed by rodents. Every job CleanRun performs in Schertz includes a written price before work starts and a documented photo record when the crew leaves.
Most single repairs, like one flex duct replacement or sealing a leaky plenum connection, take 2-3 hours. A full-system seal for an average Schertz home requires 4-6 hours, and we schedule accordingly so crews aren’t rushing to the next job. You’ll know the expected duration before you approve the written scope. Call (830) 402-5110 to schedule a free estimate.
Single repairs typically run $180-$320, full-system sealing $380-$650, and extensive metal duct repair $450-$780, with the final price depending on accessibility, materials needed, and system size. CleanRun quotes one flat price per system, agreed in writing before work begins, with no per-vent add-ons or post-arrival upsells. For an exact quote on your home, call (830) 402-5110 - estimates are free and carry no obligation.
Yes, we regularly repair and seal ductwork integrated with Honeywell zoning systems, Aprilaire dehumidifiers, Guardsman UV units, and all standard HVAC brands. Our crews carry adapters for proprietary connections and document specifications for any unfamiliar equipment rather than improvising. Haven Standard Clause 1 applies regardless of brand: written price, always, before any work starts.
We answer calls live 24 hours a day, and we schedule urgent duct repairs as quickly as possible for situations like complete disconnections or water damage that threatens system operation. Duct repair is typically a scheduled service rather than an emergency dispatch, and we’ll be transparent about when a crew can arrive rather than promising immediate response we can’t deliver. Call (830) 402-5110 to discuss your timeline.
Every duct repair and sealing job is backed by CleanRun’s 365-Day Done Right Promise: if the work is not right, we make it right, documented in writing on every job record, not subject to manager approval. This applies to materials and workmanship, and if a sealed joint fails or a replaced duct run develops a new leak within 365 days, we return and repair it at no charge. The promise is a written deliverable, not a website claim.
Clear a path to your attic access, crawl space entry, or utility closet, and secure pets in a separate room so crews can move equipment freely. You don’t need to move furniture or cover belongings; our crews use drop cloths and containment when needed. We’ll call 30 minutes before arrival to confirm you’re ready, and every technician is background-checked, uniformed, and identified by name under Haven Standard Clause 3: Verified Crews.
Schedule Your Duct Repair & Sealing Service in Schertz Today
Call (830) 402-5110 to speak with a live person and schedule your free estimate. You’ll receive a written price before any work starts, a documented photo record of every duct run when the job is done, and the 365-Day Done Right Promise in writing. No per-vent pricing, no post-arrival surprises, no obligation until you approve the scope.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning Schertz, serving Schertz, Cibolo, Universal City, and surrounding communities since 2013.