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 Bellaire
Duct repair and sealing in Bellaire, TX typically runs $280-$680 per system for most homes, with full-system sealing on multi-zone teardown-rebuild properties reaching $1,200-$2,400. CleanRun crews are dispatched from our Houston office and carry mastic sealant, flex duct inventory, and negative-pressure extraction equipment sized for both the 1960s ranch homes along Braes Boulevard and the newer multi-system estates near Evergreen Street. Call (346) 421-3357 and a live person will answer, 24/7.
We’ve worked in Bellaire since 2013. The housing stock here is split in a way you don’t see in Stafford or Missouri City: surviving mid-century slabs with original ductwork, and large replacements with three air handlers and trunk runs that span 40 feet or more. Both need sealing. Both need it done differently.
Why CleanRun Air Duct Cleaning Sugar Land Is Bellaire’s Preferred Duct Repair & Sealing Company
Our Duct Repair & Sealing team has documented photo records from over 1,200 Bellaire jobs. The reviews we receive from homeowners here, particularly in the Braeburn Country Club area and along the 77401 zip corridor, consistently mention the written price delivered before any panel came off and the before-and-after images they could scroll through on their phone before the truck left.
Dispatch and scheduling are coordinated from our Houston office, but crews serving Bellaire carry inventory specific to what we find here: 12-inch and 14-inch flex duct for ranch home retrofits, oversized mastic quantities for the multi-system homes near Lafayette Street, and camera equipment rated for the tight slab-level plenums common throughout the city.
Haven Standard Clause 3: Verified Crews means every technician is background-checked, uniformed, and identified by name before arrival. The license number is published on this page, not buried in a footer. Tomas Reyes, who leads CleanRun, established the 365-Day Done Right Promise in writing because ductwork is invisible once the ceiling goes back. In Bellaire, where Harvey-era moisture damage hides behind repaired drywall, that written accountability matters more than it does in non-flood-zone suburbs.
Our Duct Repair & Sealing Services in Bellaire
Duct Sealing with Mastic Sealant
Mastic sealant is a water-based compound brushed onto sheet-metal joints and flex duct connections, then left to cure into a flexible, permanent bond. In Bellaire, we apply it heavier than in drier climates. The 9-to-10-month AC season here means supply ducts run cold air through an attic or crawl space that stays humid year-round; a thin bead of mastic can crack from thermal cycling before the first winter. Our crews apply two coats on trunk line joints in Bellaire homes, with a 24-hour cure verification before the system is repressurized. A typical single-system mastic sealing job in Bellaire runs $280-$450.
Flex Duct Repair
Flex duct, the insulated flexible tubing common in 1960s and 1970s Bellaire ranches, degrades from the inside out in this climate. The fiberglass liner traps condensation, the plastic outer jacket becomes brittle, and the wire helix rusts. We’ve replaced collapsed flex duct in homes on Maple Street and Bellaire Boulevard where the original 1962 installation was still in place, the insulation saturated with decades of condensate. Flex duct repair in Bellaire typically costs $180-$340 per run, including the new R-6 or R-8 flex, mechanical fasteners, and mastic-sealed connections to the plenum and register boot.
Metal Duct Repair
Sheet-metal trunk lines in older Bellaire homes often show rust staining and pinhole corrosion from Harvey-era flooding or chronic slab-level moisture. We cut out damaged sections, fabricate replacement pieces from 26-gauge galvanized steel, and seal with mastic and fiberglass mesh tape. Metal duct repair in Bellaire runs $320-$580 depending on access and the linear feet of replacement. Post-repair, we run a static pressure test to confirm the system is moving design airflow, not just “less leaky.”
Duct Insulation Replacement
Insulation on exterior ductwork in Bellaire’s humidity belt fails from the vapor barrier outward. Once the outer jacket tears, the fiberglass wicks moisture, loses R-value, and becomes a mold substrate. We strip compromised insulation, treat the metal beneath with antimicrobial where indicated, and rewrap with new foil-faced insulation sealed at every seam. Insulation replacement on accessible ductwork in Bellaire homes typically runs $240-$420 per system.
Air Leak Repair
Air leak repair addresses the gaps between duct sections, around register boots, and at the air handler connection that pull attic air into the system or dump conditioned air into the wall cavity. In Bellaire’s teardown-rebuild homes with oversized multi-zone systems, we frequently find three air handlers with long trunk runs and multiple leaks per zone. A single-system sealing quote on a three-system house leaves the other two zones leaking conditioned air into the attic. We quote per system, and we document every leak location with a photo before sealing. Air leak repair in Bellaire starts at $260 per system for standard access.
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 Bellaire
CleanRun technicians carry professional-grade equipment from Rotobrush, Nikro, and Honeywell on Bellaire jobs. Rotobrush mechanical brushes handle the source removal in flex duct with heavy debris loads. Nikro negative-pressure extractors maintain containment during post-Harvey remediation work. Honeywell static pressure gauges and airflow meters verify that sealed systems are performing to specification, not just “less leaky.” We stock flex duct, mastic, and register boots locally so Bellaire customers aren’t waiting on parts while their system runs inefficiently.
Common Duct Repair & Sealing Problems We See in Bellaire Homes
- Post-Harvey moisture damage in slab-level systems. Bellaire sits in the Brays Bayou drainage corridor that flooded catastrophically during Hurricane Harvey. Technicians here routinely open duct systems in homes with fully repaired visible interiors and find rust staining, silty debris, and active mold colonies that were never remediated. A condition far rarer in non-flood-zone suburbs like Katy or The Woodlands.
- Collapsed original flex duct in 1960s ranches. The fiberglass-lined flex duct installed in Bellaire’s mid-century ranch homes has endured 50-plus years of Gulf Coast humidity cycling. We regularly find collapsed, water-stained runs in the Braeburn Country Club area and along Jessamine Street where the original ductwork is still in place.
- Multi-zone system leaks in teardown-rebuild homes. Large replacement homes near Evergreen Street and S. Rice Avenue often have three air handlers and trunk runs exceeding 40 feet. A single-system sealing quote leaves the other two zones leaking. Per-system pricing and full-system documentation are essential here.
- Mold growth behind sealed patches. Bellaire’s near-year-round AC operation creates persistent condensation on supply duct interiors. A patch that looks sealed on day one can grow mold behind the insulation within a single summer if the underlying moisture source isn’t addressed first.
Pricing for Duct Repair & Sealing in Bellaire, TX
Here is what duct repair and sealing costs in Bellaire’s market, based on jobs we’ve completed with written prices delivered before work started:
| Service | Typical Range in Bellaire |
|---|---|
| Mastic sealant, single system | $280 - $450 |
| Flex duct repair, per run | $180 - $340 |
| Metal duct repair, per section | $320 - $580 |
| Duct insulation replacement, per system | $240 - $420 |
| Air leak repair, per system | $260 - $480 |
| Multi-zone sealing (3 systems) | $1,200 - $2,400 |
What moves a job toward the higher end: limited attic or crawl access, Harvey-era debris requiring source removal before sealing can begin, and multi-zone homes where three systems must each be sealed and tested independently. What keeps it lower: straightforward access, single-system homes, and no pre-existing contamination requiring remediation.
Every price is written and delivered before any work starts. Haven Standard Clause 1. No exceptions. Call (346) 421-3357 for an exact quote on your system. Estimates are free.
We Also Serve Cities Near Bellaire
CleanRun crews dispatched from our Houston office also perform Duct Repair & Sealing in Bellaire and surrounding communities: Stafford, Missouri City, Sugar Land, and Houston proper. Each city page contains pricing and local conditions specific to that market. If you’re on the border of two service areas, call (346) 421-3357 and we’ll confirm which crew carries the right inventory for your housing stock.
Serving Bellaire, TX - Our Local Coverage Area
We’re based in the Bellaire 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 Bellaire
Yes. Every system is priced separately because every system has its own duct runs, leak points, and static pressure profile. In Bellaire’s teardown-rebuild homes with three air handlers, we deliver three written prices. One flat price per system, agreed before work starts. Call (346) 421-3357 for an exact quote. Estimates are free.
Yes. Post-Harvey remediation was uneven across Bellaire, and technicians working this city regularly encounter duct systems with rust staining, silty debris, and active mold colonies in homes whose owners fully repaired visible flood damage but never had the ductwork inspected. The pattern is concentrated in lower-elevation blocks closest to Brays Bayou. A camera inspection of your return plenum and first few duct runs will show whether your HVAC system was included in the remediation or left untouched.
Bellaire’s position in Houston’s Gulf Coast humidity belt means central AC runs roughly 9-10 months per year, creating persistent condensation on supply duct interiors and near-ideal conditions for mold colonization behind any seal that isn’t applied to a dry, clean surface. Sealing done without source removal first often fails within one summer here. In drier suburbs north of Houston, a surface-level seal might hold longer. In Bellaire, we verify dryness with a moisture meter before applying mastic, and we photograph the substrate condition as part of the documented record.
Yes, with conditions. Original flex duct from the 1960s or 1970s in Bellaire ranches is often collapsed, water-stained, or internally lined with debris that no sealant can adhere to. On a slab-on-grade 1962 ranch in the Braeburn Country Club area, our tech ran a camera inspection through a return plenum and found the original fiberglass-lined flex duct collapsed and water-stained from a Harvey-era intrusion the owner had never addressed. We isolated the affected runs under negative pressure, performed source removal on the supply and return ducts, then sealed the sheet-metal trunk joints with mastic and re-insulated the damaged sections. Post-job static pressure readings and a blower motor amp check confirmed the system was finally moving air as designed. Sealing alone would not have solved it.
Every CleanRun job in Bellaire concludes with a Documented Photo Record: images of every duct run before and after work, the written scope of what was sealed or replaced, the written price you agreed to, and the 365-Day Done Right Promise. For duct sealing specifically, we include static pressure readings before and after, and a leak location map showing where each seal was applied. You receive this as a standard deliverable, not an add-on. If a company cannot show you what they did inside your walls, you cannot verify the work was performed.
Call (346) 421-3357 to schedule a free estimate. A live person answers, 24/7. The written price arrives before any work starts. The photo record arrives before the truck leaves. And the 365-Day Done Right Promise stays in force long after.
Written by Tomas Reyes, Owner at CleanRun Duct Repair & Cleaning, serving Bellaire since 2013.