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 Converse
Most duct repair calls we get from Converse aren’t about sudden failures. They’re about rooms that never cooled right, utility bills that climbed year after year, or a cleaning visit that revealed the real problem: original flex duct from 1987 collapsed against a truss, or a collar joint separated so long ago that three tenant families just learned to live with it. Duct repair and sealing in Converse typically runs $280-$780 for standard flex replacement and mastic sealing, with full-system resealing on older homes reaching $1,200-$2,400 depending on accessibility and the number of compromised runs. We dispatch to Converse from our San Antonio office, and most repair visits include a written price before any panel comes off, plus a documented photo record of every run we touch. Call (726) 600-7155 to schedule.
Why CleanRun Air Duct Cleaning San Antonio Is Converse’s Preferred Duct Repair & Sealing Company
We’ve worked Converse long enough to recognize the pattern before we park the truck. The 1980s and 1990s tract homes between FM 78 and Loop 1604, the rental properties cycling through Randolph personnel every few years, the original flexible ductwork cooking in 140°F attics through eight months of continuous AC. It’s not theoretical. Our Duct Repair & Sealing crew has photographed the inside of thousands of Converse duct runs, and the documentation is part of every job record we deliver.
Converse customers find us because someone they know - a neighbor in Woodlake, a colleague from the base - mentioned the photo record. Or they brought us a competitor’s written estimate and we put our number next to it, free, under our Free Second Opinion policy. Haven Standard Clause 1 requires a written price before any work starts. No exceptions. Our technicians are background-checked, uniformed, and identified by name before arrival - Haven Standard Clause 3: Verified Crews. The 365-Day Done Right Promise is backed in writing on every job, not just stated in marketing copy.
Tomas Reyes established CleanRun in 2013. Every one of the 52,000-plus homes we’ve served since received a written price before work started and a documented photo record when the crew left. That includes the Converse rentals where we found color-banded debris layers stacked like sedimentary rock, each band a different tenant’s occupancy, because no one had cleaned between PCS cycles.
Our Duct Repair & Sealing Services in Converse
Duct Sealing
Sealing is often the right first move in Converse’s older tract homes, but only after camera inspection confirms the ducts are intact enough to seal. We apply mastic sealant - a water-based compound that remains flexible - to collar joints, trunk connections, and register boots where the original tape has dried and failed. Mastic outperforms foil tape in Converse’s attic heat, which degrades adhesives in 3-5 years. A typical sealing job on a 1,800-square-foot Converse home runs $680-$1,150, depending on the number of accessible joints and whether we need to remove insulation to reach them. We photograph every sealed joint before closing up.
Flex Duct Repair
This is the service we perform most often in Converse. The original flex duct in 1978-2000 builds was rated for 25 years in moderate climates. Northeast Bexar County attics are not moderate. The inner liner degrades. The wire helix corrodes. The insulation compresses. We replace damaged flex with new R-6 or R-8 insulated duct, secure it with mechanical collars and mastic sealant, and support it properly so it doesn’t rest against trusses or compress at bends. Single-run replacement in Converse typically costs $280-$450. Multiple runs or full-system replacement on larger homes runs $1,400-$2,800. We use Rotobrush inspection cameras to verify the repair before we leave.
Metal Duct Repair
Some Converse homes, particularly earlier builds near the original town center and certain Woodlake phases, have galvanized steel trunk lines with stamped branch takeoffs. These corrode at the seams and can separate from the plenum. We repair with sheet-metal patches, drives and cleats, and high-temperature mastic. Metal repair is less common than flex replacement here, but when it’s needed, the work is more involved - typically $520-$940 for accessible trunk repair. We always inspect the full trunk before quoting, because a corroded section often signals more problems downstream.
Duct Insulation
When we replace flex in a Converse attic, the new duct includes fresh insulation. But we also encounter homes where the ductwork is sound but the insulation jacket has torn or compressed, exposing the inner liner to attic heat and condensation. We wrap these runs with new insulation and vapor barrier, secured with proper bands, not tape. Insulation wrap on accessible duct in Converse runs $180-$340 per run. The payoff is immediate: reduced heat gain, less condensation, and lower cooling load in a climate where AC runs from March through November.
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 Converse
Our equipment roster includes brands customers can verify independently: Rotobrush for duct inspection and agitation, Abatement Technologies for negative-pressure extraction systems, and Guardsman for sealants and repair materials. We stock common flex diameters, collar sizes, and mastic compounds for Converse’s predominant housing stock, which means most repairs don’t wait on parts. For whole-home sealing and air quality upgrades, we also work with Aprilaire filtration and ventilation components. Every tool and material is named on your written scope before work begins.
Common Duct Repair & Sealing Problems We See in Converse Homes
- Original flex duct collapsed against trusses. In Converse’s slab-on-grade homes, supply runs often route through tight attic spaces where a single poorly placed support strap lets the duct sag onto a truss. Over years the flex crushes flat. The register moves no air. Camera inspection finds it every time. The fix is replacement, not cleaning.
- Collar joints separated at the trunk connection. This is where Converse’s rental turnover pattern shows up. The original mechanical seal loosens, maybe from vibration, maybe from thermal cycling in a 140°F attic. Tenant after tenant never reports it. We find gaps blowing conditioned air straight into the attic. Mastic sealing restores the connection, or we replace the collar if the plastic has fatigued.
- Return trunk packed solid with lint and cedar pollen. Converse’s position in the path of December-to-February mountain cedar pollen means return ducts accumulate allergenic debris year after year. When filters go unchanged across multiple tenant cycles - common in rentals - the blower pulls debris past the filter and packs the trunk. Cleaning clears it. Sealing the return box and filter rack prevents recurrence.
- Slab-embedded ductwork with no access. Some 1980s Converse builds ran supply ducts in the concrete slab. When these fail, options are limited. We camera-inspect to confirm the problem, then discuss rerouting through the attic or conditioned space. It’s not a quick fix, but it’s documented and priced in writing before any demolition.
Pricing for Duct Repair & Sealing in Converse, TX
Here’s what duct repair and sealing actually costs in Converse’s market, based on jobs we’ve completed in the last 24 months:
| Service | Typical Range |
|---|---|
| Single flex duct run replacement | $280 - $450 |
| Mastic sealing of accessible joints (whole home) | $680 - $1,150 |
| Metal trunk repair (accessible section) | $520 - $940 |
| Duct insulation wrap (per run) | $180 - $340 |
| Full-system flex replacement + sealing | $1,400 - $2,800 |
| Camera inspection with written report | $145 - $195 |
These are whole-system prices, not per-vent teaser rates. What moves the number: attic accessibility, the number of compromised runs, whether we need to move insulation or work around stored items, and whether the plenum itself needs resealing. Every quote is written and agreed before work starts - Haven Standard Clause 1. No exceptions. We also offer a Free Second Opinion on any competitor’s written estimate. Bring it in. We’ll put our number next to it.
Call (726) 600-7155 for an exact quote on your home. Estimates are free.
We Also Serve Cities Near Converse
Our Duct Repair & Sealing in Converse crew also works regularly in Universal City, Schertz, Cibolo, and San Antonio. The housing stock and failure patterns vary by city - Schertz’s newer builds present different issues than Converse’s 1980s rentals - and we adjust our approach accordingly. Same written pricing, same photo documentation, same Haven Standard whether we’re on FM 78 or across the county line.
Serving Converse, TX - Our Local Coverage Area
We’re based in the Converse 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 Converse
Because your home likely cycled through multiple Randolph-area tenants without duct cleaning between leases, and each tenant’s occupancy - different pets, smoking habits, filter maintenance - deposited a distinct debris layer. Our crew routinely finds these color bands in Converse rentals, with the densest accumulation usually at the collar joint where flex meets trunk. The pattern is specific to military-adjacent rental markets with high turnover and no maintenance handoffs. Call (726) 600-7155 for a camera inspection that shows you exactly what’s inside.
It depends on the liner condition, which we determine by camera inspection. If the inner plastic liner is intact and only the joints are leaking, mastic sealing is the right fix, typically $680-$1,150. If the liner is degraded, crumbling, or the wire helix is corroded - common after 30-plus years in a 140°F Converse attic - the run needs replacement. We photograph the condition and show you before quoting. No work starts without a written price you agree to.
Most often it’s a crushed or separated flex duct in the attic. On a 1987 slab-on-grade rental off FM 78 near Randolph, we pulled a supply boot and found the original flex duct crushed flat against a truss, its inner liner collapsed and the joint separated since the second tenant cycle. After camera inspection confirmed the run was short and accessible, we replaced the damaged flex, re-secured it with mastic sealant and new collars, and verified static pressure at the air handler before leaving - the front bedroom register finally moved air like it was supposed to. The same pattern shows up across Converse’s older tract homes. Camera inspection finds it in 20 minutes.
Yes. Converse sits directly in the path of northerly winds that carry mountain cedar pollen from the Hill Country each December through February, one of the most allergenic pollen events in North America. The pollen is fine enough to pass through standard filters and accumulates in return ducts and on blower wheels. Combined with 8-plus months of continuous AC operation in high humidity, Converse ducts accumulate both pollen and microbial growth faster than in drier climates. Cleaning removes it. Proper sealing of the return path and filter rack helps keep it out. Call (726) 600-7155 to schedule.
We verify it three ways: static pressure measurement at the air handler before and after, smoke pencil testing at accessible joints to confirm no leakage, and thermographic imaging where conditions allow. Most importantly, the documented photo record shows every sealed joint, every replaced run, every pressure reading. You receive this as a standard deliverable, not an extra. The 365-Day Done Right Promise means if airflow doesn’t improve or a joint fails, we return and make it right - backed in writing, not subject to manager approval. Call (726) 600-7155 with any concern.
Ready to see what’s actually inside your ducts? Call (726) 600-7155 or schedule online. We’ll deliver a written price before any work starts, photograph every run before and after, and back the result with our 365-Day Done Right Promise. Tomas Reyes and the CleanRun team have served this market since 2013. We don’t sell visits. We deliver documented records.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Converse and northeastern Bexar County since 2013.