Duct Sealing in Alvin - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Alvin

We serve Alvin from our Houston dispatch office, and our crews know the difference between a routine duct sealing call and the post-storm moisture jobs this Gulf Coast city demands. If you’re in Alvin and your HVAC system smells musty, blows weak, or your energy bills have climbed without explanation, duct sealing is often the fix. Call (361) 326-5060 for a free estimate with a written price before any work starts.

Call (361) 326-5060

Our technicians have worked from the older ranch homes near Mustang Road to the farmhouses out toward Santa Fe, and we’ve learned that Alvin’s combination of rice-harvest dust, slab-foundation construction, and hurricane-season flooding creates duct problems you won’t find inland. That’s why our Duct Sealing team carries mastic sealant, metal-backed tape, and moisture meters on every truck. We don’t guess at what’s happening inside your walls. We inspect, measure, and price it in writing.

Why Hollis Air Duct Cleaning Is Alvin’s Preferred Duct Sealing Company

We’ve been part of the Garrison Partners family since 2004, and our standard hasn’t changed: arrive inside the quoted window, price in writing, complete the job by the book, leave the site clean. In Alvin, that discipline matters more than in most markets because the wrong approach to duct sealing after a flood can trap moisture and make the problem worse.

Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. And every duct sealing job in Alvin carries our 365-Day Done Right Promise in writing. If the seal fails, if a joint opens, if moisture finds its way back in, we return and make it right at no charge. That includes a free second visit, not a negotiation.

Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail loops, no callback queues, no waiting until Monday when your ducts are holding standing water from Saturday’s storm.

We understand the local building stock. Much of Alvin’s housing consists of mid-century ranch homes and older farmhouses with original galvanized or flex ductwork that traps rice-harvest dust and is prone to moisture damage. Many of these homes were never properly sealed when built. We know where the leaks typically form, how the slab foundations interact with flood events, and what it takes to seal a system that has already seen water.

HVAC Duct Sealing in Alvin

HVAC Duct Sealing in Alvin is often a moisture-control and air-containment job rather than a simple efficiency upgrade. The process involves sealing every joint, seam, register boot, and foundation penetration in your duct system with mastic sealant and metal-backed tape rated for HVAC use. We pressurize the system to verify the seal holds. In Alvin’s humid subtropical climate, this matters because unsealed ducts pull attic air, crawlspace moisture, and post-flood humidity directly into your living space.

A typical HVAC duct sealing job in Alvin runs $850 – $1,800 for a single-system home, depending on duct accessibility, the extent of existing damage, and whether we’re working with original galvanized trunks or newer flex runs. Homes that have taken on floodwater may need additional remediation before sealing can be effective.

Slab-Foundation Penetration Sealing

In Alvin’s mid-century ranch and farmhouse stock, slab-foundation penetrations routinely wick floodwater into original galvanized runs after a storm-surge event, so duct sealing here is often a post-flood moisture-control job rather than a dust job. We seal these penetrations with closed-cell foam and mastic, creating a barrier that resists both air leakage and water intrusion. This is standard on every post-storm job we do in Alvin.

Blower Cabinet and Air Handler Containment

The blower motor cabinet is a common leak point that most homeowners never see. We seal the return plenum, filter rack, and cabinet seams to prevent the system from pulling unconditioned garage or attic air. In Alvin, where garage temperatures can reach 110°F in summer, this single step often drops cooling costs measurably.

Duct Repair in Alvin

Duct Repair in Alvin addresses the physical damage that precedes or accompanies sealing needs: crushed flex runs, rusted galvanized trunks, disconnected collars, and register boots pulled loose by settling slab foundations. We replace damaged sections with new ductwork, reconnect separations with mechanical fasteners, and then seal the entire system. Repair without sealing is incomplete; sealing without repairing damaged sections is temporary.

Typical duct repair in Alvin runs $400 – $950 for localized damage, or $1,200 – $2,400 for extensive replacement of original galvanized systems in older homes. We price by the job, not by the vent, and the written quote you receive before work starts is the price you pay.

Flood-Damaged Section Replacement

After a hurricane or heavy rain, technicians in Alvin often find that ducts in slab-foundation homes have taken on water through foundation penetrations, requiring emergency cleaning and disinfection. We cut out waterlogged flex or corroded metal, disinfect the remaining trunk with an EPA-registered solution, and install new material. This isn’t a upsell. It’s a requirement before sealing can be effective.

Galvanized Trunk Restoration

Original galvanized steel ducts in Alvin’s older homes develop pinhole corrosion from the inside out, especially after moisture events. We assess whether spot repair or full replacement is warranted, and we show you the camera footage so you can see what we see. No fogging treatment fixes rusted metal.

Trusted Brands We Service in Alvin

Our trucks carry professional-grade equipment from Rotobrush, Nikro, and Abatement Technologies, the same tools commercial crews use in hospitals and schools. For filtration and containment, we stock products from Honeywell, Aprilaire, and Guardsman. We don’t use hardware-store shop vacs or consumer-grade tape. For Alvin homeowners, this means we can source replacement components and filtration upgrades without waiting on out-of-town shipments. Most repairs and sealing jobs are completed in a single visit because the right parts are already on the truck.

Common Duct Sealing Problems We See in Alvin Homes

• Foundation penetration leaks after storm surge. Slab homes near Mustang Road and throughout Alvin’s older neighborhoods routinely take on water where the main trunk passes through the foundation. We seal these with closed-cell foam and mastic rated for wet conditions, not the cloth-backed tape that dissolves in humidity.
• Rice-harvest dust infiltration through unsealed return paths. Alvin’s agricultural heritage means fine silica dust from harvest operations finds every gap in your duct system. Sealing the return side prevents this dust from bypassing your filter and coating your evaporator coil.
• Mold colonization in original galvanized trunks. The combination of Gulf humidity and post-flood moisture creates ideal conditions for mold inside unsealed metal ducts. We address this with source removal under negative pressure, then seal to prevent recurrence. Fogging alone does not remove established mold.
• Disconnected flex runs in attic spaces. Alvin’s heat and humidity degrade the adhesives on older flex duct connections. We reconnect with mechanical straps and seal with mastic, not tape that will fail again in two seasons.

Pricing for Duct Sealing in Alvin, TX

We Also Serve Cities Near Alvin

Our crews work throughout the south Houston metro, including Duct Sealing in Alvin plus Manvel, Friendswood, Pearland, and Santa Fe. Each community has its own housing stock and climate patterns, and we adjust our approach accordingly. Scheduling and dispatch are coordinated from our Houston office for efficient routing across the service area.

FAQs About Duct Sealing in Alvin