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 The Woodlands Homeowners
Duct repair and sealing in The Woodlands typically addresses leaks, disconnected runs, and deteriorated insulation that waste 20-30% of conditioned air before it reaches your rooms. Most repairs are completed in a single visit with a written price agreed before any work starts. CleanRun Air Duct Cleaning The Woodlands has documented every duct run with before-and-after photos since 2013, and every job carries our 365-Day Done Right Promise in writing.
We’ve served more than 52,000 homes across Montgomery and Harris counties, and the calls we get from The Woodlands usually follow a pattern: rooms that won’t hold temperature, utility bills that climbed without explanation, or a recent air duct cleaning that revealed disconnected flex duct in the attic. The Woodlands’ mature oak canopy and humid subtropical climate accelerate duct deterioration. Attic temperatures here regularly exceed 140°F in July, baking mastic sealant and flex duct connections year after year. Homes in Grogan’s Mill and Panther Creek built during the 1970s and 1980s often have original galvanized metal duct with failing fiberglass insulation. Newer construction in Sterling Ridge and Creekside Park frequently shows pinch points and poor sealing at the plenum, the central distribution box where your HVAC system’s main trunk begins.
Our crews are background-checked, uniformed, and identified by name before arrival under Haven Standard Clause 3: Verified Crews. We carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies. Every estimate is free, every price is written, and every repair is photographed. Call (346) 248-1474 to schedule.
What Our Duct Repair & Sealing Service Includes
Duct Sealing
Duct sealing closes the gaps, cracks, and failed joints that allow conditioned air to escape into your attic, crawl space, or wall cavities. In The Woodlands, we most often find sealant failure at the plenum connections and where flex duct meets metal register boots, especially in homes with original construction dating to the 1980s and 1990s. Our crews use a two-step process: first, a smoke pencil or theatrical fog test to locate every leak point; second, professional-grade mastic sealant or foil-backed tape rated for Texas attic temperatures, applied to a clean, dry surface so the bond holds. Every sealed joint is photographed before and after, and the photo record is delivered with your job documentation.
Flex Duct Repair
Flex duct, the ribbed plastic tubing with fiberglass insulation that snakes through most Texas attics, collapses, tears, or disconnects at its connection points after 15-20 years of heat cycling. In The Woodlands neighborhoods like Indian Springs and Cochran’s Crossing, we regularly find flex duct that has pulled completely off the register boot, dumping conditioned air directly into the attic. Our repair replaces damaged sections with new, properly sized flex duct, secures connections with metal draw bands rather than plastic zip ties, and supports the run every four feet to prevent future sagging. The repair is photographed at the disconnect point and after reconnection.
Metal Duct Repair
Galvanized steel ductwork, common in The Woodlands homes built before 1995, corrodes at seams and develops holes where insulation has trapped moisture against the metal. We repair minor corrosion with patch kits and professional-grade sealant; for more extensive damage, we fabricate replacement sections on-site or source matching gauge metal. Metal duct repair requires precise measurement. An ill-fitting patch creates turbulence that whistles and reduces airflow. Our technicians measure twice, cut once, and photograph the repair before insulation is reinstalled.
Duct Insulation
Duct insulation in The Woodlands attics degrades from the outside in. The outer vapor barrier cracks; fiberglass compresses; R-value, the measure of thermal resistance, drops by half or more. We install new fiberglass insulation with a proper vapor barrier, secured with mechanical fasteners rather than tape that will fail in the next heat wave. For runs in unconditioned spaces, we specify insulation rated to the Department of Energy’s climate zone 2 standards. The before photo shows compressed, yellowed insulation; the after photo shows full-loft fiberglass with intact facing.
Mastic Sealant
Mastic is a thick, water-based sealant that remains flexible after curing, making it the professional standard for duct sealing in hot climates. Unlike tape, which degrades, mastic fills gaps up to 1/8 inch and forms a permanent bond. We apply mastic with a brush or caulking gun to clean metal surfaces, then allow proper cure time before pressurizing the system. In The Woodlands’ high-humidity environment, we select mastic rated for mold resistance. The application is photographed to confirm complete coverage at every joint.
Air Leak Repair
Air leaks in ductwork often hide behind finished ceilings or within wall cavities. We locate them using a combination of pressure testing, theatrical fog injection, and thermal imaging. Once identified, we access the leak through the least invasive route, repair with appropriate materials, and verify with a post-repair pressure test. In The Woodlands, we frequently trace leaks to poorly sealed return air pathways that draw attic air into the system, introducing dust, pollen, and humidity. The pressure test results, before and after, are included 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
Our crews have hands-on experience with the equipment brands installed in The Woodlands homes. We’ve serviced hundreds of systems with Honeywell media air cleaners and Aprilaire whole-house humidifiers, and we stock common replacement parts for both. When duct repair involves reconnecting or modifying plenum connections to these units, we follow manufacturer specifications for clearance and airflow, and we photograph the work to document compliance. Rotobrush and Nikro equipment is standard on our trucks for duct cleaning that often precedes or follows repair work; Abatement Technologies negative-air machines protect your home during any job that requires cutting or disturbing existing ductwork.
Whether your system includes Guardsman UV air purifiers, a custom-built plenum from a regional fabricator, or any other make of HVAC component, we can assess, repair, and document. Our license number is published on every estimate and invoice, and we provide a Free Second Opinion on any written estimate from another contractor. Bring their quote; we’ll put our number next to it in writing.
BeforeAfterSigns You Need Duct Repair & Sealing Right Now
- Uneven temperatures from room to room. If your master bedroom in Sterling Ridge runs five degrees warmer than the kitchen in January, the duct run serving that room is likely leaking or disconnected. You’re paying to condition your attic, not your bedroom.
- Utility bills that spike without explanation. A sudden 20% increase in your Entergy or CenterPoint bill often traces to a major duct leak that opened when flex duct finally separated at a connection point. The system runs longer to reach setpoint, consuming more electricity or gas.
- Dust accumulation immediately after cleaning. If you’ve dusted thoroughly and new dust appears within 24 hours, your return duct may be pulling attic air through a gap. The Woodlands’ pollen season makes this especially noticeable in spring.
- Whistling or rushing air sounds from walls or ceilings. These noises indicate high-velocity air escaping through a gap under pressure. The sound location usually marks the leak site, though sound can travel through framing.
- Visible duct damage in the attic during other work. If your insulation contractor, electrician, or pest control technician has photographed crushed, torn, or disconnected duct, that damage is costing you money every time the system cycles. We provide a Free Second Opinion on any written estimate for repair.
Our Duct Repair & Sealing Process - Step by Step
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Written estimate before any work starts. Our technician arrives, identifies the problem, and delivers a written price under Haven Standard Clause 1. No verbal quotes, no “it depends” pricing, no work until you’ve approved the scope in writing. The estimate includes the specific repair, materials, and documentation deliverables.
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Photographic documentation of existing conditions. Before touching anything, we photograph the damaged duct from multiple angles, including any identifying marks on nearby equipment. This becomes the “before” in your Documented Photo Record and establishes the baseline for our 365-Day Done Right Promise.
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Repair using manufacturer-specified methods. We match materials to the existing duct type, use mechanical fasteners rather than shortcuts, and verify proper support and slope for condensate drainage where applicable. Every connection is tested for integrity before moving to the next.
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Pressure testing and verification. Where the scope includes air leak repair or sealing, we pressurize the system and verify results with a manometer or theatrical fog test. The post-repair pressure reading is recorded and included in your job documentation.
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Final photography and written job record delivery. We photograph every repaired or sealed joint, compile the before-and-after record, and deliver it with your invoice. The 365-Day Done Right Promise is included in writing. Payment is due only after you’ve reviewed the documentation and confirmed satisfaction.
How Much Does Duct Repair & Sealing Cost in The Woodlands?
A typical duct sealing job for a single-family home in The Woodlands runs $450-$850 depending on system size, attic accessibility, and the extent of sealant failure; see how much Duct Repair & Sealing costs for a fuller breakdown. Flex duct repair for one or two damaged runs typically falls between $280-$520. Metal duct repair, which may require custom fabrication, ranges from $350-$750 per section. Full duct insulation replacement for an average 2,400-square-foot home generally costs $1,200-$2,400. Mastic sealant application as a standalone service starts around $320 for a standard system with accessible joints.
| Service | Typical Range in The Woodlands | Primary Cost Factors |
|---|---|---|
| Duct Sealing (whole system) | $450 - $850 | Number of joints, attic access, system size |
| Flex Duct Repair (per run) | $280 - $520 | Length, diameter, accessibility |
| Metal Duct Repair (per section) | $350 - $750 | Gauge matching, fabrication needs, insulation |
| Duct Insulation Replacement | $1,200 - $2,400 | Home size, R-value specified, vapor barrier |
| Mastic Sealant Application | $320 - $650 | Number of joints, prep work required |
| Air Leak Repair (diagnostic + repair) | $380 - $780 | Leak location, access route, verification testing |
What affects your specific price: attic temperature and working conditions (summer repairs in 140°F attics require additional safety protocols), the age and material of existing ductwork, whether repairs require moving insulation or cutting access panels, and whether the system needs cleaning before repair work can proceed effectively. We do not quote per-vent pricing. Every estimate is for the complete scope of work, agreed in writing before we begin.
How to avoid overpaying: be wary of any contractor who quotes a low “starting at” price over the phone without seeing your system. The $79 duct cleaning coupon model has trained some homeowners to expect unrealistically low numbers. Real duct repair requires materials, labor, and documentation. Our written price includes all three, with no add-ons discovered after work begins. We also offer a Free Second Opinion on any written estimate from another contractor.
What’s included in your free estimate: a complete inspection of accessible ductwork, identification of all visible problems, a written scope of repair with line-item pricing, and a copy of our standard job documentation sample so you know exactly what you’ll receive. Call (346) 248-1474 to schedule. Estimates are free and carry no obligation.
Duct Repair & Sealing Near The Woodlands - Our Service Area
CleanRun Air Duct Cleaning The Woodlands serves homeowners throughout Montgomery and northern Harris counties, including Duct Repair & Sealing in Tomball, Duct Repair & Sealing in Conroe, Spring, Pinehurst, Willis, Humble, Aldine, Jersey Village, Atascocita, Cleveland, and Hunters Creek Village. Most The Woodlands appointments are scheduled within three to five business days. Emergency repairs for complete duct separation or conditions that threaten HVAC equipment are prioritized. Our technicians live in the communities they serve, so they know the construction eras, the common duct configurations, and the access challenges specific to neighborhoods from Panther Creek to Creekside Park.
Serving The Woodlands, TX - Our Local Coverage Area
We’re based in the The Woodlands area and know this community well, and we also provide Duct Repair & Sealing - Tomball. 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 The Woodlands
Duct repair and sealing is the professional correction of leaks, disconnections, insulation failure, and physical damage in your home’s forced-air distribution system. Sealing closes gaps that waste energy and introduce contaminants; repair replaces or restores damaged materials so conditioned air reaches its intended destination. CleanRun delivers both services with a written price before work starts and a Documented Photo Record of every repair.
Most residential duct repair and sealing jobs in The Woodlands are completed in four to six hours. A simple flex duct reconnection might take two hours; a full system seal with insulation replacement can extend to a full day. We specify the expected duration in your written estimate so you can plan accordingly. Call (346) 248-1474 for a time estimate specific to your situation.
Whole-system duct sealing typically runs $450-$850; individual repairs range from $280-$750 depending on materials and access. We also offer Duct Repair & Sealing - Spring. Full insulation replacement for an average home costs $1,200-$2,400. Every CleanRun estimate is written, itemized, and delivered before work begins under Haven Standard Clause 1. Call (346) 248-1474 for an exact quote - estimates are free.
Yes. Our crews have direct experience with Honeywell media air cleaners, Aprilaire humidifiers and ventilation controls, and the duct configurations these brands require. We carry common parts and follow manufacturer specifications for clearance, airflow, and connection methods. Whether your system includes these brands or any other make, we can assess and repair.
We prioritize calls involving complete duct separation, water intrusion into ductwork, or conditions that risk HVAC equipment damage. All calls are answered by a live person, 24/7, and we schedule urgent repairs as quickly as possible. For non-urgent repairs, we typically schedule within three to five business days. Call (346) 248-1474 to discuss your situation.
Every job is backed by our 365-Day Done Right Promise, a written guarantee included with your invoice. If the repair fails, leaks, or proves unsatisfactory within one year, we return and make it right at no charge. This is Haven Standard policy, not a discretionary courtesy. The promise is in writing on every job, not just stated in marketing materials.
Clear a path to your attic access, ensure pets are secured away from work areas, and have your most recent utility bills available if you’ve noticed cost increases. Our technician will need access to all registers and the indoor HVAC unit. You do not need to move furniture unless it directly blocks a register; we handle protection and cleanup. Call (346) 248-1474 to schedule - we’ll confirm any specific preparation when we set your appointment.
Schedule Your Duct Repair & Sealing Service in The Woodlands Today
Call (346) 248-1474 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 repair, and the 365-Day Done Right Promise in writing. No coupons, no surprises, no vacuum noise. Just documented work you can verify.
Written by Tomas Reyes, Owner at CleanRun Air Duct Cleaning The Woodlands, serving The Woodlands, Tomball, Conroe, and surrounding communities since 2013, including our Duct Repair & Sealing in Pinehurst.