Fast, Reliable Duct Repair & Sealing Across Cloverleaf
Duct repair and sealing in Cloverleaf typically costs $280–$650 depending on the scope, and most jobs are completed same-day. Call (855) 683-5929 for a free estimate.
We’ve been working in Cloverleaf long enough to know that duct problems here aren’t the same as duct problems in Katy or The Woodlands. The homes around Woodforest Boulevard, near the Port Road corridor, and throughout the 77015 ZIP code face a specific set of challenges that come from sitting right next to the Houston Ship Channel’s industrial corridor. We’re Scott Gray and the team at Lone Star Air Duct Cleaning Service Houston, and we make the short drive to Cloverleaf regularly — usually within 45 minutes of your call. Our Duct Repair & Sealing crew understands the local housing stock, the climate stressors, and the air-quality realities that come with living this close to North America’s densest concentration of petrochemical refineries.
Why Lone Star Air Duct Cleaning Service Houston Is Cloverleaf’s Preferred Duct Repair & Sealing Company
Cloverleaf homeowners aren’t looking for a sales pitch. They’re looking for someone who shows up, identifies the actual problem, and fixes it without needing a second contractor. That’s what we deliver.
Our reputation here is built on repeat calls and referrals from neighbors. Across 433 verified reviews, we hold a 4.9-star average — a volume that only comes from doing the job correctly hundreds of times over. Owner Scott Gray works as the lead technician on every single job. You won’t get a rotating crew of trainees. You’ll get two decades of hands-on experience diagnosing duct systems exactly like yours.
Response time to Cloverleaf is typically under an hour from dispatch. We know the area — the grid of post-war streets between I-10 and the Ship Channel, the pockets of 1950s and 1960s construction near Market Street, the newer infill closer to Beltway 8. That local knowledge means we arrive with the right materials and equipment, not guesses.
Our Duct Repair & Sealing Services in Cloverleaf
Duct Sealing
Most Cloverleaf homes built between 1945 and 1975 were never properly sealed when central air was retrofitted. The original galvanized trunk lines have seams that leak conditioned air into attics and crawlspaces, while drawing in unfiltered air from outside. In 77015, that outside air carries industrial particulates you don’t want circulating through your living room. We seal metal seams with solvent-resistant mastics rated for chemical exposure, not the standard tapes that degrade in Houston’s humidity. A typical duct sealing job in Cloverleaf runs $280–$450 for a single system.
Flex Duct Repair
The flex-duct branches in Cloverleaf’s older homes are failing now — 50 to 70 years of thermal cycling and acidic humidity have cracked the insulation and separated the mylar inner liner from the trunk connections. We see this constantly in the wood-frame cottages near the Ship Channel, where crawlspaces stay damp year-round. Our crew reconnects flex to galvanized trunks using mastic-sealed collars, replaces deteriorated sections with new insulated flex duct, and verifies airflow balance before we leave. Flex duct repair in Cloverleaf typically ranges from $180–$340 per branch.
Metal Duct Repair
Original galvanized sheet-metal trunk lines in Cloverleaf homes corrode from the bottom up. Condensation pools in low spots, especially in attics that hit 140°F in August, and the metal thins until it leaks or collapses. Post-Harvey flooding made this worse — many 77015 homes had duct systems submerged in silt-laden water that was never fully cleaned out. We patch or replace corroded sections, reinforce sagging trunks, and ensure drainage slopes are correct. Metal duct repair in Cloverleaf generally runs $320–$580 depending on linear footage and access difficulty.
Duct Insulation
When we open attics in Cloverleaf, we regularly find original duct insulation that’s compressed, mold-stained, or simply missing. In a climate where attics exceed 130°F for months at a time, uninsulated or poorly insulated ducts bleed cooling capacity before the air ever reaches your vents. We install new fiberglass or closed-cell insulation wraps, sealed at all seams, to bring your system back to modern efficiency standards. Duct insulation work in Cloverleaf typically costs $400–$720 for a complete system.
Mastic Sealant Application
Standard mastic fails in Cloverleaf. The combination of 80%+ humidity and hydrocarbon exposure from the Ship Channel degrades conventional water-based sealants within a few seasons. We use Guardsman industrial-grade sealants rated for chemical resistance and high-moisture environments. This matters especially for homes within a mile of the industrial fence line, where duct boots and plenums accumulate that dark, oily residue we keep finding. Mastic sealing as a standalone service in Cloverleaf runs $250–$420.
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.
Trusted Brands We Service in Cloverleaf
We stock parts and materials that hold up to Cloverleaf’s specific conditions. Our equipment roster includes Rotobrush rotary systems for mechanical cleaning, Nikro HEPA vacuums for debris extraction, and Abatement Technologies for remediation-grade work. For filtration upgrades after sealing jobs, we install Honeywell and Aprilaire media filters — the Aprilaire 2200 and 2400 series handle the fine particulate load that comes with industrial proximity far better than standard fiberglass throws. We carry Guardsman sealants on every truck because we’ve learned the hard way that off-the-shelf mastic doesn’t survive here. Parts availability means most Cloverleaf jobs finish in one visit, not two.
Common Duct Repair & Sealing Problems We See in Cloverleaf Homes
- Flex-duct branches separate from galvanized trunk lines in 1950s–70s homes, creating direct pathways for crawlspace air — and Ship Channel pollutants — to enter supply airflow. The acidic humidity here accelerates the wire corrosion that holds these connections together.
- Original galvanized sheet-metal seams corrode along the bottom due to persistent condensation, allowing silt and standing-water debris from flooding events to re-enter supply air. Hurricane Harvey damage persists in duct systems that were never properly remediated.
- Mastic seals fail prematurely because standard products degrade under Cloverleaf’s combination of high humidity and hydrocarbon exposure. We find cracked, powdery sealant on jobs where other contractors worked just two or three years prior.
- Duct boots and plenums develop oily, particulate-coated residue in homes near the Ship Channel fence line. This isn’t ordinary dust — it’s industrial fallout that indicates your system is drawing in unfiltered outside air through leaks.
Pricing for Duct Repair & Sealing in Cloverleaf, TX
We’re straightforward about what things cost. Here’s what we typically see in the 77015 market:
- Duct sealing (mastic, full system): $280–$450
- Flex duct repair/replacement (per branch): $180–$340
- Metal duct repair (patch or section replacement): $320–$580
- Duct insulation (full system wrap): $400–$720
- Mastic sealant application (standalone): $250–$420
- Air leak repair (localized boot/plenum work): $150–$280
What moves you within these ranges? Accessibility — crawlspace work costs more than attic work. Extent of corrosion — patching one section versus replacing ten feet of trunk line. Contamination level — systems with heavy industrial residue require more cleaning time before sealing can begin. We don’t guess. We inspect, show you what we found, and give you a written estimate before any work starts. Estimates are free. Call (855) 683-5929.
We Also Serve Cities Near Cloverleaf
Our service radius covers the full east Houston industrial corridor. We regularly work in Jacinto City — similar housing stock, similar challenges. Channelview and Galena Park sit even closer to the Ship Channel and show the same duct contamination patterns we see in Cloverleaf. Deer Park adds refinery proximity to the mix. Same crew, same equipment, same owner-led service on every job.
Serving Cloverleaf, TX — Our Local Coverage Area
We’re based in the Cloverleaf 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 Cloverleaf
It’s industrial particulate matter — PM2.5, hydrocarbon fallout, and sulfur compounds from the petrochemical corridor — drawn into your duct system through leaks in the return side. Standard household dust is gray and dry. This residue is dark, slightly greasy, and has a chemical odor. If you’re seeing it on your supply registers, your duct system has significant leaks that need sealing, not just cleaning. Call (855) 683-5929 and we’ll pinpoint the entry points.
Yes, in most cases we can replace individual duct boots without replacing the entire trunk line. We fabricate custom boots to fit your existing galvanized or flex connections, seal with Guardsman chemical-resistant mastic, and verify airflow. Boot replacement in Cloverleaf typically runs $150–$280 per location. If the surrounding trunk is also corroded, we’ll show you and price both options.
Yes — this is one of the most common calls we get in 77015. We reconnect flex to the trunk using mastic-sealed collars, replace any cracked or moldy flex sections, and balance airflow. We recently sealed a 1950s flex-duct system on a home near the intersection of Woodforest and Port Road where the homeowner had lived with a persistent chemical smell for years. Our crew found that the original flex duct branches had separated from the galvanized trunk line, drawing in industrial PM2.5 from the crawlspace. We reconnected the flex to the trunk using mastic-sealed collars, replaced moldy flex with insulated duct, and applied Aprilaire media filters to trap fine particulates. Call (855) 683-5929 for a free inspection.
Standard water-based mastic cannot — it cracks and powders within a few seasons. We use Guardsman industrial-grade sealants specifically rated for high-humidity and chemical-exposure environments. In Cloverleaf’s conditions, product selection matters as much as application technique. We’ve been using this approach for years with callbacks near zero.
Every three to five years, or immediately after any flooding event. The combination of industrial air load, high humidity, and aging metal in Cloverleaf’s housing stock means seals degrade faster than in inland suburbs. If your energy bills are creeping up, rooms aren’t cooling evenly, or you smell chemical odors when the AC runs, test sooner. We offer free duct inspections — call (855) 683-5929 to schedule.
Ready to stop losing conditioned air and stop drawing in industrial particulates? Call Lone Star Air Duct Cleaning Service Houston at (855) 683-5929 for a free duct inspection and written estimate. Scott Gray personally leads every job, and we’ll typically be at your Cloverleaf home within the hour.
Written by Scott Gray, Owner at Lone Star Air Duct Cleaning Service Houston, serving Cloverleaf and the Houston area since 2004.