Duct Sealing in Conroe - Tested First, Written Price Second

Fast, Reliable Duct Sealing Across Conroe

We dispatch to Conroe from our Houston scheduling office, and most days we’re on-site in the Conroe area within a couple hours of your call. Our crews know the difference between a ranch home off Metcalf Street near downtown and a new build in the subdivisions along FM 1488, and that local knowledge changes what we bring to your attic. If your registers smell musty or your upstairs rooms never cool evenly, the fix is usually in the ductwork, not the AC unit itself. Call us at (361) 326-5060 for a free estimate, and we’ll show you exactly where your system is leaking.

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

We’ve been part of the Garrison Partners family since 2004, and our Duct Sealing team has worked in enough Conroe attics to know what this housing stock does. The 1960s – 80s ranch homes near downtown Conroe have original galvanized metal ducts that behave differently than the flexible ductwork in newer subdivisions off Loop 336. We don’t guess. We run a camera, show you the leak points, and write the price down before any sealing starts.

Our technicians are background-checked, uniformed, and expected to arrive inside the quoted window, price in writing, and leave the site clean. That’s The Garrison Standard. Every repair we make in Conroe is backed by our 365-Day Done Right Promise: if the work fails within a year, we come back and make it right at no charge, including a free second visit. No negotiation, no runaround.

Phones are answered by a live person 24 hours a day, 7 days a week. You’ll talk to a human who can schedule your Conroe appointment, not a callback queue that dumps you to Monday.

Air Duct Sealing in Conroe

Air Duct Sealing in Conroe is the process of closing gaps, loose joints, and disconnected runs in your HVAC duct system so conditioned air reaches your rooms instead of leaking into your attic or crawl space. In Conroe’s climate, where AC runs eight months a year and attic temperatures push past 100°F, every cubic foot of cooled air that escapes your ducts is money you’re paying to cool your insulation. Most Conroe homeowners need duct sealing when they notice uneven temperatures between rooms, musty smells at the registers, or utility bills that climb without explanation. A typical whole-system duct sealing job in Conroe runs $450 – $1,200 depending on accessibility, duct material, and how many joints or runs need attention.

What We Find in Older Conroe Homes

In Conroe’s 1960s – 80s ranch homes near downtown, the original galvanized metal trunk-and-branch duct systems were sized for the window units and early central systems of that era, so when a modern high-static air handler is tied into them, the loose slip-and-drive joints leak hardest at the takeoffs nearest the plenum. The leak isn’t evenly spread down the run. We see this pattern repeatedly in neighborhoods north of downtown, and it takes a trained eye to spot which joints are actually pulling attic air versus which ones just look old.

Sealing Versus Replacement

Not every leaky duct needs replacement. If the metal is structurally sound and the runs are intact, mastic sealing and proper foil tape at the joints can restore system efficiency for a fraction of the cost of new ductwork. We make that call with a camera inspection, not a sales pitch. You’ll see the footage yourself before we quote any work.

Duct Sealing Services in Conroe

Duct Sealing Services in Conroe cover everything from spot-repair of a single disconnected branch run to full-system mastic sealing of every accessible joint in your attic or crawl space. Our process starts with a pressure test and camera inspection to map the leak points, followed by source removal (cleaning the joint surfaces so sealant actually bonds), then application of UL-181 rated foil tape and duct mastic at every failure point. For Conroe’s newer homes with flexible ductwork off FM 1488 and Loop 336, we focus on collar connections and support points where flex has sagged or pulled loose. A targeted spot repair in Conroe typically runs $180 – $350, while a full-system seal on an older ranch home with metal ductwork can reach $900 – $1,400 if multiple crushed or disconnected runs need reconnection.

Attic Work in Conroe Heat

Conroe’s slab-foundation homes with attic air handlers put our crews in 100°F+ conditions for extended periods. We schedule morning slots when possible, and we don’t rush the prep work. A seal applied over dusty metal will peel within a season. We wipe every joint, apply mastic with a brush to ensure full coverage, and use mechanical fasteners where the code requires them.

The Musty Smell Fix

That “musty AC smell” Conroe homeowners describe is often humid attic air being drawn in through loose plenum joints. Sealing those joints stops the odor at its source. We’ve had homeowners tell us the smell disappeared the same day we finished the work, because we weren’t masking anything, we were stopping the infiltration.

Trusted Brands We Service in Conroe

We seal and service duct systems connected to equipment from every major manufacturer, and we stock sealing materials and filtration products from Aprilaire, Abatement Technologies, and Guardsman for fast turnaround on Conroe jobs. Our rotary brush systems from Rotobrush and negative-air machines from Nikro handle the source removal step that makes sealing last. When we need a specific collar, boot, or transition piece for an older Conroe system, we source it locally rather than ordering and making you wait. The right part matters on original metal ductwork where modern fittings don’t always mate cleanly.

Common Duct Sealing Problems We See in Conroe Homes

• Mastic applied over dirty galvanized joints. In older Conroe homes near downtown, previous owners or handymen often smeared sealant over dust-coated metal without cleaning first. The bond fails within months, and the leak returns worse than before because the mastic trapped moisture against the metal.
• Crushed branch runs hidden in attic insulation. We find these constantly in Conroe’s ranch homes. A homeowner or roofer stepped on a branch duct decades ago, flattening it or pulling it loose at the takeoff. The system still “works,” but that room stays hot and the return side pulls attic air through the gap.
• Sealing without addressing static pressure. If your blower motor is dirty or your filter is clogged, the system runs under higher negative pressure. Seal one leak and the air finds the next weakest joint. We check static pressure before we seal, and we tell you if the real fix starts with a cleaning or motor service.
• Flex duct collars pulling loose in newer subdivisions. Homes off FM 1488 and Loop 336 with flexible ductwork often develop leaks where the flex meets the metal collar. The zip ties loosen, the tape dries out, and conditioned air spills into the attic. It’s a quick fix if caught early, an efficiency nightmare if ignored for years.

Pricing for Duct Sealing in Conroe, TX

We Also Serve Cities Near Conroe

Our crews work throughout Montgomery County and north Houston, including Duct Sealing in Conroe proper plus Willis, Pinehurst, Spring, and Magnolia. The same written pricing, same 365-Day Done Right Promise, same background-checked technicians at every stop.

FAQs About Duct Sealing in Conroe