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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AfterGuardsman Duct Repair & Sealing in Schertz: What to Know First
CleanRun Air Duct Cleaning Schertz provides independent Guardsman duct repair and sealing for homeowners in Schertz and nearby areas, with most repairs scheduled within a few business days and every job quoted with a written price before any work starts. Typical Guardsman duct sealing jobs in this market run $340-$780 for residential systems, depending on whether we’re sealing accessible joints or replacing degraded flex runs in the attic. We’re not affiliated with or authorized by Guardsman; we service their equipment as an independent Guardsman service provider using quality OEM or aftermarket parts that match the original specifications.
This page is for Schertz homeowners who’ve found their Guardsman duct system leaking, whistling, or delivering uneven temperatures room to room, and who want to know what failed, what it’ll cost, and whether the repair holds up. Call (830) 402-5110 for a free written estimate.
How Guardsman Products Fail - and How We Fix Them
- Guardsman Flex-Grip series: collar separation at plenum connections. The Flex-Grip’s barbed collar design, common in Schertz builds from 2016-2020, relies on a compression band that loosens faster than competing clamps in our heat. We’ve found the gap opens 1/8 to 3/16 inch, enough to bleed 15-20% of conditioned air into the attic. We remove the degraded band, reseat the collar with a stainless worm-gear clamp rated for 180°F continuous, and seal with mastic rated for flexible duct (a water-based sealant that stays pliable where the original dried rigid).
- Guardsman Rigid-Seal metal trunk lines: seam splitting at longitudinal joints. The Rigid-Seal line uses a Pittsburgh-lock seam that performs adequately until the attic hits 140°F repeatedly, which it does in Schertz from June through September. Thermal cycling fatigues the lock; we spot the failure with a borescope camera, then cut back to sound metal and fabricate a splice sleeve with matching 26-gauge galvanized stock, sealed with fiber-reinforced mastic and mechanical fasteners.
- Guardsman Insul-Tec flex duct: inner liner collapse at sag points. Insul-Tec’s fiberglass insulation sleeve is thicker than standard, which sounds good until the flex spans more than 6 feet without support and the weight pulls the inner liner away from the wire helix. In Schertz, where installers often stretched runs to avoid cutting additional penetrations, we see this in roughly one of every four Insul-Tec systems we open. We replace the collapsed section with supported flex duct (maximum 4-foot unsupported span per SMACNA guidelines) and add galvanized strap hangers at 4-foot intervals.
- Guardsman Register-Seal boots: gasket degradation at floor and ceiling penetrations. The Register-Seal line uses a foam gasket between the boot and drywall that turns to powder after 7-10 years in Texas humidity. Air leaks here don’t show on duct blaster tests if the boot itself is sealed, but they pressurize wall cavities and drive moisture into framing. We remove the old gasket, clean the mating surface, and install a closed-cell neoprene gasket rated for 20-year ozone exposure, then seal the perimeter with mastic.
- Guardsman Snap-Tite dampers: blade seal failure in zoning systems. Snap-Tite motorized dampers use a rubber-edged blade that hardens and cracks, causing zones to fight each other and the HVAC system to run overtime. We’ve documented this in Schertz homes where the homeowner’s electric bill jumped 30% before they noticed the temperature imbalance. We replace the blade assembly with an OEM-equivalent or, if the actuator is also failing, install a quality aftermarket damper with a 5-year seal warranty.
Our Guardsman Duct Repair & Sealing Process
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Call and schedule. A live person answers, notes your Guardsman model if you know it, and books a diagnostic visit. No “call for a quote” - we don’t do that.
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Arrival and borescope inspection. Our technician, identified by name before arrival, photographs the interior of every accessible duct run with a camera system. The before photo does the talking. I just bring the camera. If the system is clean and intact, we say so and charge only the diagnostic fee.
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Written scope and price. We specify Guardsman-compatible parts (OEM or quality aftermarket, your choice, with the trade-off explained), labor hours, and the 365-Day Done Right Promise. Haven Standard Clause 1: the price is fixed before a single panel comes off.
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Repair and seal. We perform the work, pressure-test sealed joints with a manometer (a gauge that measures air pressure difference in inches of water column), and photograph every completed run.
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Delivery of documented record. You receive the before-and-after photo set, the written scope, and the warranty document as standard deliverables - not extras, not upon request.
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365-Day follow-up. If the repair fails or the seal opens, we return under the Done Right Promise. It’s backed in writing, not subject to manager approval.
BeforeAfterWhat Guardsman Duct Repair & Sealing Costs in Schertz
| Service | Typical Range |
|---|---|
| Single flex duct run repair/replacement (Guardsman-compatible) | $280-$450 |
| Metal trunk seam repair with sleeve and mastic seal | $340-$580 |
| Full system sealing (mastic, access, test) - average Schertz home | $580-$920 |
| Register boot reseal with gasket replacement (per boot) | $85-$140 |
| Snap-Tite damper blade or assembly replacement | $220-$380 |
What moves the price: attic accessibility (blown insulation adds time), number of compromised runs, whether we need to cut access panels in drywall (patched, not left open), and whether the original Guardsman parts are still in production or require aftermarket substitution. We don’t charge per vent - one flat price per system, agreed in writing.
Call (830) 402-5110 for a free written estimate. Bring a competitor’s quote; we’ll put our number next to it under our Free Second Opinion.
Why Schertz Homeowners Call CleanRun Air Duct Cleaning Schertz for Guardsman Work
We’ve been working Schertz long enough to recognize the installation patterns: the 2017-2019 builds off Roy Richard Drive where Flex-Grip collars were installed hand-tight, the older homes near Schertz Parkway where the original ductwork hasn’t been touched since the first owner moved in. Tomas Reyes, our owner and lead technician, grew up in Queens and learned the trade at Apex Technical School in Long Island City before spending the better part of two decades pulling flex duct and documenting what actually lives inside these systems. He and the crew have been in this market for several years now.
We also service Lennox, Trane, and Carrier duct systems, which matters because most Schertz homes have mixed infrastructure - a Guardsman trunk feeding into generic flex, or a third-party air handler on Guardsman returns. Our technicians recognize the interfaces where brands meet and where those junctions typically fail. Every job carries the 365-Day Done Right Promise, every crew member is background-checked and uniformed under Haven Standard Clause 3: Verified Crews, and every price is written before work starts.
FAQs
No. Guardsman’s limited warranty covers defects in materials and workmanship from the factory; it does not restrict who can perform repairs or maintenance on installed ductwork. As an independent Guardsman service provider, we use parts that meet or exceed OEM specifications, and we document our work so any future warranty claim on original components remains supportable. If you’re unsure about a specific component, call us at (830) 402-5110 and we’ll review your warranty documents with you.
It depends on the series and age. Guardsman still produces OEM replacement dampers and collar assemblies for current lines; for discontinued series like early Insul-Tec, we source quality aftermarket from manufacturers whose specs we verify against the original. We explain the trade-off in writing before you decide - OEM where available, aftermarket where equivalent, never a mystery part.
Replace if the ductwork is past 20 years and showing multiple failure modes (seam splits, collapsed flex, degraded insulation) or if the original design is undersized for the home’s current HVAC load. Repair if the damage is localized and the trunk layout is sound. We make this recommendation based on what the camera shows, not on a sales target, and we’ll tell you if a repair buys you 5-7 years at one-third the replacement cost.
Most diagnostics are scheduled within 2-4 business days. We don’t promise same-day dispatch because duct repair is a scheduled job that requires attic access, proper lighting, and time to photograph and seal correctly. Rushing it produces leaks you can’t see until the electric bill arrives.
We pressure-test sealed joints with a digital manometer and record the reading; we photograph every completed run; and we deliver both to you as part of the standard job record. If the seal fails within 365 days, the Done Right Promise covers the return visit and rework at no charge. Call (830) 402-5110 if you want to review what documentation you’ll receive before booking.
Written by Tomas Reyes, Owner & Lead Technician, CleanRun Air Duct Cleaning Schertz at CleanRun Air Duct Cleaning Schertz, serving Schertz and nearby areas.