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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AfterFast, Reliable Duct Sealing Across Angleton
Duct sealing in Angleton typically runs $400 – $1,200 for a whole-home system, and most jobs are completed in a single visit with the price written before any work begins. If your AC smells musty the moment it kicks on, or your energy bills keep climbing despite the unit running constantly, you’re probably losing conditioned air through gaps in your ductwork. Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate. Our Duct Sealing crews serve Angleton from our Dallas-Fort Worth dispatch office, with background-checked, uniformed technicians who arrive inside the quoted window and leave the site clean.
Why Hollis Air Duct Cleaning Is Angleton’s Preferred Duct Sealing Company
We’ve been part of the Garrison Partners family since 2004, and our reputation in Brazoria County is built on one thing: doing what we said we’d do, in writing, before we touch anything. In Angleton, that means showing up when we said we would, pricing the job on paper before the mastic comes out, and standing behind it for 365 days with our Done Right Promise.
Our technicians are background-checked and uniformed. You know who’s walking into your home before they arrive. 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 crawlspace is pooling water and pulling that damp air straight into your living room.
We know Angleton’s housing stock. The mid-century ranches near downtown. The 1970s pier-and-beam neighborhoods off Blue Ridge Road. The newer subdivisions spreading toward Highway 35. Each has different duct problems, and we treat them differently. A slab-on-grade home in a 2005 subdivision doesn’t have the same crawlspace moisture issues as a 1960s ranch with uninsulated metal runs underneath. We don’t sell the same package to both.
HVAC Duct Sealing in Angleton
HVAC Duct Sealing in Angleton means finding and closing every gap, seam, and joint in your forced-air system so the air you paid to cool actually reaches your rooms instead of leaking into your attic, crawlspace, or walls. In this market, we see two distinct problems: the chronic humidity damage in older pier-and-beam homes, and the settling and thermal expansion cracks in newer ductwork. A typical HVAC duct sealing job in Angleton runs $400 – $900 for partial-system work and $700 – $1,200 for whole-home sealing, depending on accessibility and how much of the system needs attention.
Most Angleton homeowners call us when they notice uneven cooling, musty odors when the AC starts, or utility bills that don’t match the thermostat setting. The Gulf Coast humidity here is relentless. When your ducts leak, they’re not just losing air. They’re pulling in damp crawlspace air, attic air, or in some neighborhoods near the industrial corridor, air carrying fine particulate fallout you don’t want circulating through your bedrooms.
What the Sealing Process Actually Involves
We pressurize the system to locate leaks with precision, then seal joints and seams with mastic or metal-backed tape rated for HVAC use. Not duct tape. Duct tape fails in months under temperature cycling. We use materials that last, and we document the before-and-after pressure readings so you see the improvement in hard numbers.
When Pier-and-Beam Homes Need Special Attention
Angleton’s older pier-and-beam construction puts duct runs in crawlspaces that stay damp year-round. Uninsulated metal trunk lines sweat so heavily in summer that puddles form beneath the joists. We seal those crawlspace runs first, because every gap is pulling that wet, biologically active air into your supply ducts. This is not a generic problem. It’s an Angleton problem.
Duct Repair in Angleton
Duct Repair in Angleton addresses the physical damage that sealing alone won’t fix: crushed flex duct from contractors crawling through attics, corroded metal runs in damp crawlspaces, disconnected joints from decades of vibration, and sections chewed by rodents or compromised by water damage. A typical duct repair in Angleton runs $250 – $600 for isolated section replacement and $500 – $1,500 for more extensive rebuilds of damaged trunk lines or multiple branch ducts.
We don’t automatically replace what we can repair. But we also don’t seal over rotted flex duct or corroded metal and call it done. The Garrison Standard requires us to show you the damage, explain your options, and write the price for each before any cutting starts. If a section is too far gone, we’ll say so. If it can be patched and sealed properly, we’ll say that too.
Corrosion and Water Damage Assessment
In Angleton’s humid subtropical climate, metal duct in damp crawlspaces corrodes from the outside in. We inspect with cameras where possible, and we don’t guess. If the metal is pinholed or the interior insulation is waterlogged, repair is usually the better long-term value than repeated sealing calls.
Disconnected and Crushed Sections
Settling, pest activity, and work by other trades in attics or crawlspaces often crush flex duct or pull joints apart. These aren’t always obvious from the living space. You just know one room never cools properly. We map the system, find the break, and repair it with matched materials and proper support.
Trusted Brands We Service in Angleton
Our equipment roster includes Rotobrush rotary brush systems for mechanical agitation, Nikro negative-air machines for controlled debris extraction, and filtration products from Honeywell, Aprilaire, and Guardsman. We don’t use hardware-store gear. For Angleton homeowners, that means we stock the fittings, mastics, and replacement materials to complete most repairs and sealing jobs without waiting on parts. Fast turnaround matters when your crawlspace is actively feeding moisture into your ductwork. We carry what we need to finish the job in one visit, test the system, and show you the results.
Common Duct Sealing Problems We See in Angleton Homes
- Crawlspace moisture infiltration in pier-and-beam construction. Uninsulated metal duct runs under Angleton’s older homes sweat continuously in summer, creating puddles beneath the joists. Every seam and joint becomes a pathway for that damp, mold-feeding air to enter your supply ducts. Sealing the interior runs while ignoring the crawlspace source is a temporary fix at best.
- Biological growth fed by year-round AC operation. Because Angleton’s climate keeps air conditioners running through much of the year, ducts never fully dry out. Mold colonies that might go dormant in drier climates become chronic here. Fogging treatments mask the odor but leave the colony intact and actively reproducing.
- Industrial particulate accumulation near the refinery corridor. Homes along and near Blue Ridge Road see fine particulate fallout from Brazoria County’s petrochemical facilities. This material accumulates in duct walls, combines with humidity, and creates a biologically active sludge that standard vacuuming won’t remove. Source removal with negative-air containment and HEPA filtration is required.
- Thermal expansion and settling cracks in newer subdivisions. Angleton’s 1990s – 2000s homes often have flex duct systems that develop gaps at joints after years of thermal cycling and foundation settling. These leaks are less dramatic than crawlspace flooding but add up to significant energy loss and uneven cooling.
Pricing for Duct Sealing in Angleton, TX
Whole-home duct sealing in Angleton typically runs $700 – $1,200. Partial-system sealing, targeting the most problematic runs, usually falls between $400 – $900. Duct repair, when sections need replacement rather than sealing alone, ranges from $250 – $600 for isolated fixes to $500 – $1,500 for more extensive rebuilds. These are whole-system prices, not per-vent teaser rates that balloon once the technician is inside your home.
What moves the price: accessibility of your ductwork (attic vs. crawlspace vs. both), the extent of damage or corrosion, whether we need to remove biological growth before sealing, and if sections require replacement rather than sealing. We write the full price before any work starts. It does not move at the door. Every job carries our 365-Day Done Right Promise: if the repair fails within a year, we return and make it right at no charge, including a free second visit.
Call (361) 326-5060 for a free estimate. We’ll inspect your system, show you what we find, and give you a written price you can take to another company for comparison if you want. No pressure. No moving targets.
We Also Serve Cities Near Angleton
Our crews regularly work in Angleton and the surrounding communities: Lake Jackson, Clute, Freeport, and West Columbia. The same Gulf Coast humidity and industrial corridor conditions affect ductwork across Brazoria County, and we bring the same equipment, standards, and written guarantees to every job in the region.
Serving Angleton, TX - Our Local Coverage Area
We’re based in the Angleton 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 About Duct Sealing in Angleton
Your ductwork is likely pulling in damp, biologically active air from a crawlspace or attic through gaps and seams. In Angleton’s humid subtropical climate, with summer humidity above 75% and pier-and-beam homes that trap moisture underneath, mold colonies never fully dry out. The smell returns because the source, the moisture, and the biological growth are still there. Sealing the leaks and removing the growth at the source fixes it. Masking it with fogging does not. Call (361) 326-5060 and we’ll show you exactly where the air is coming from.
No, not as a substitute for proper sealing and source removal. Fogging masks odor for a few weeks but leaves biologically active mold colonies and refinery particulate fallout sitting in your duct walls. In Angleton’s climate, those colonies keep growing. The fog wears off. The smell returns, usually worse, because you’ve delayed the actual fix. We don’t sell fogging upsells. We seal the leaks and remove the contamination with controlled negative-air methods and HEPA filtration. That’s what lasts.
You might, but the problem is different. Slab-on-grade homes in Angleton’s newer subdivisions don’t have the crawlspace moisture issues that plague pier-and-beam construction. Your leaks are more likely in attic runs, from thermal expansion, settling, or joints working loose over years of cycling. We inspect with pressure testing and cameras to find the actual leaks before recommending any work. Call (361) 326-5060 for a free estimate and we’ll tell you what you’re actually dealing with.
Fine particulate fallout from the petrochemical facilities along Blue Ridge Road and the broader Industrial Corridor accumulates in duct walls, especially in homes with leaks that pull in outside air. Combined with Angleton’s high humidity, this creates a biologically active, industrially contaminated sludge that standard cleaning won’t touch. Source removal with professional-grade negative-air equipment and HEPA filtration is required. This is not a generic dirty-duct problem. It’s specific to this geography.
No. Sealing stops the pathway for contaminated air to enter your ducts, but it doesn’t kill or remove existing mold colonies. If your crawlspace runs are actively growing mold, we need to source-remove what we can reach, then seal to prevent reinfection. In chronic cases with extensive biological growth, section replacement may be necessary. We assess each system honestly and write separate prices for removal, repair, and sealing so you choose what you’re willing to invest. Call (361) 326-5060 for an inspection and written options.
We were called out to a pier-and-beam ranch near Blue Ridge Road where the homeowner kept smelling a musty odor the moment the AC kicked on. A camera inspection of the crawlspace runs showed uninsulated metal trunk lines sweating so badly that water was pooling beneath the joists, and the seams had opened enough to pull damp crawlspace air straight into the supply and return ducts. We sealed the leaking runs and joints, then source-removed the biological growth we could reach before it spread through the living space. The price was written before we started. The work is covered for 365 days. That’s how we operate on every job.
Ready to stop losing conditioned air and pulling damp, contaminated air into your home? Call Hollis Air Duct Cleaning at (361) 326-5060 for a free estimate. We’ll inspect your system, show you what we find with camera evidence where possible, and give you a written price that doesn’t change at the door. Every job is backed by our 365-Day Done Right Promise: if it’s not right, we make it right, at no charge, including a free second visit. That’s The Garrison Standard.
Written by Roy Castellanos, Owner at Hollis Air Duct Cleaning, serving Angleton and Brazoria County since 2004.