Duct Sealing in Highlands - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Highlands

We know Highlands. We know the way the Gulf humidity hangs in the air along Wallisville Road, the way the older homes off Main Street rattle their sheet-metal ducts when the AC kicks on, and the way a disconnected flex run in a mid-century ranch near the ship channel can bleed conditioned air into the attic for years before anyone notices. Duct sealing in Highlands typically runs $450 – $1,200 for a whole-home seal, depending on accessibility and how many joints need attention, and most jobs are scheduled within a few business days. Call us at (361) 326-5060 for a free written estimate before any work starts.

Call (361) 326-5060

Our crews dispatch from the Houston office and serve Highlands directly. We’ve sealed ducts in the original 1960s homes near the old shipyard worker neighborhoods, in the newer construction pushing toward the east, and everywhere the petrochemical corridor’s fine particulate settles into HVAC systems. That local knowledge changes how we approach the job.

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

We’ve been part of the Garrison Partners family since 2004, and our reputation in Highlands rests on something simple: we show up inside the window, we price it in writing before we touch anything, and we leave the site clean. The Garrison Standard isn’t a slogan. It’s a checklist. Arrive on time. Uniform on. Background-checked technician at the door. Written price. Do the work by the book. No surprises.

Our Duct Sealing team has worked in Highlands long enough to recognize the patterns. Disconnected collars in original sheet-metal trunks. Crushed flex runs where someone crawled through the attic years ago. Mastic that turned to powder after twenty summers of Gulf heat. When we seal your ducts, we’re not guessing at what’s up there. We’ve seen it.

Phones are answered by a live person, 24 hours a day, 7 days a week. No voicemail loops. No “leave a message and we’ll call back Monday.” If you’re calling about Duct Sealing in Highlands, you’ll talk to someone who can get you scheduled.

Every repair carries our 365-Day Done Right Promise in writing. If the seal fails within a year, we come back and make it right at no charge. That includes a free second visit. Not every outfit in the Houston metro puts that in writing.

Air Duct Sealing in Highlands

Air Duct Sealing in Highlands means closing the gaps, cracks, and disconnected joints that let conditioned air escape before it ever reaches your rooms. In this market, the combination of aging mid-century housing stock and decades of Gulf Coast humidity means duct systems here often leak 20 – 30% of their airflow into attics and crawl spaces. We seal with mastic compound and mechanical fasteners, not tape that will dry and peel, and we test our work with a duct blaster or pressure gauge to prove the leakage dropped.

Most Highlands homeowners need sealing when they notice uneven temperatures between rooms, utility bills climbing without explanation, or dust pulling from the attic through return leaks. The Air Duct Cleaning in Highlands we also perform can address the contamination, but sealing stops the pressure imbalances that draw it in.

How We Access and Assess Your System

We start every Highlands job with a full inspection of accessible ductwork, including the trunk lines near the air handler and the branch runs to each room. In the older homes off Main Street and around the original shipyard neighborhoods, we often find original sheet-metal trunks with failed fiberglass insulation and gaps at every collar. We photograph what we find and show you before we quote.

Sealing Methods That Hold Up Here

Highlands’s cooling season runs eight to ten months, and attic temperatures regularly exceed 130°F. We use water-based duct mastic rated for continuous high heat, applied with brushes and reinforcement mesh at joints, plus mechanical locking at flex connections. Tape alone fails in this climate. We don’t use it as a primary seal.

Duct Sealing Services in Highlands

Duct Sealing Services in Highlands cover the full range of residential duct repair and airtightness improvement, from spot-sealing a single disconnected bedroom run to comprehensive whole-system sealing with post-work verification. Our technicians carry Rotobrush rotary systems and Nikro negative-air equipment, but for sealing, the tools are simpler and the discipline matters more: access, clean, seal, secure, test. A typical whole-home seal in Highlands runs $450 – $1,200, with smaller spot repairs starting around $180 – $350.

We also handle Dryer Vent Cleaning in Highlands, which pairs naturally with duct work since both involve airflow, pressure, and the same attic and crawl access points. Many homeowners schedule both together.

Return Side Sealing

Return leaks are the hidden problem in Highlands homes. When your return duct pulls air from a hot attic instead of from your rooms, it strains the compressor, drives up humidity, and draws in the industrial particulate and mold spores common in this corridor. We seal return plenums, filter racks, and platform connections with particular attention because the pressure here is highest.

Supply Run Repair and Replacement

Crushed or disconnected flex runs are common in Highlands’s older homes where attic access is tight and original installers worked fast. When a run is too damaged to seal effectively, we replace it with new insulated flex, properly supported and sealed at both ends, and we show you the before and after.

Trusted Brands We Service in Highlands

We work with professional-grade equipment and filtration products from Aprilaire, Abatement Technologies, and Guardsman, the same brands commercial crews specify for hospitals and industrial facilities. For Highlands homeowners, that means the mastic compounds, sealants, and replacement duct materials we carry are rated for the continuous heat and humidity your attic sees, not hardware-store products that degrade in two seasons. We stock common flex diameters, collar sizes, and filter rack materials locally, so most repairs don’t wait on parts. If your system uses Honeywell or Aprilaire filtration components, we can integrate sealing work with filter upgrades that actually fit your return plenum without gaps.

Common Duct Sealing Problems We See in Highlands Homes

• Disconnected flex runs in original mid-century attics. The homes built for shipyard workers along Main Street and the older grid neighborhoods often have flex duct that was never properly supported. Over decades, it sags, kinks, or pulls free entirely. We find runs blowing 55°F air straight into attic insulation.
• Failed mastic at sheet-metal trunk joints. Original mastic from the 1960s and 70s turns to powder after enough Gulf heat cycles. We scrape it clean and reseal with modern compounds rated for continuous 200°F exposure.
• Return platform leaks drawing attic air. In Highlands, where humidity stays above 70% for months and industrial particulate settles on every surface, a leaky return is more than an efficiency problem. It’s a contamination pathway. We seal these with reinforced mastic and gasketed filter racks.
• Storm and flood damage after hurricane-season moisture intrusion. Water finds ductwork through soffit vents, damaged roof decking, or crawl space flooding. We inspect for corrosion and separated connections after major weather events, particularly in low-lying areas near the ship channel.

Pricing for Duct Sealing in Highlands, TX

We Also Serve Cities Near Highlands

Our crews work throughout the Houston Ship Channel corridor, including Highlands, Channelview, Baytown, La Porte, and Deer Park. Scheduling is coordinated from our Houston office, but the technicians who arrive at your door know these neighborhoods and their specific housing stock.

FAQs About Duct Sealing in Highlands