You’re paying to cool your home, not your attic. But when your ducts leak or sit uninsulated in 130-degree attic heat, that’s exactly what happens.
Properly installed ductwork means the cool air your system produces actually reaches your rooms. No more hot spots in the back bedroom. No more cranking the thermostat down just to feel comfortable in the living room. Just consistent temperatures throughout your Leon Valley home.
The difference shows up on your energy bill too. Leaky or poorly insulated ducts can waste up to 30% of your cooling capacity. That’s money leaving through your attic every single month. New ductwork stops that waste and puts your system back to work doing what it’s supposed to do.
You’ll also breathe cleaner air. Old ducts with leaks pull in attic dust, insulation particles, and whatever else is up there. Replacing ducts in attic spaces eliminates that problem at the source.
We’ve been handling HVAC work across San Antonio and surrounding areas like Leon Valley for over two decades. We’re veteran-owned, which means we show up when we say we will and do the job right the first time.
We’ve seen every type of ductwork problem Texas homes throw at us. From collapsed flex ducts in cramped attics to undersized returns that never stood a chance, we know what works in this climate and what doesn’t.
Leon Valley homes face the same challenges most South Texas properties do: extreme attic heat, clay soil foundations that force ducts into unconditioned spaces, and HVAC systems that run hard for months at a time. We design and install ductwork that handles those conditions without falling apart in five years.
We start with an attic inspection to see what you’re working with. That means looking at your current ductwork, measuring airflow, checking for leaks, and figuring out if your system is sized correctly for your home.
From there, we map out a duct plan that matches your HVAC system’s capacity. Undersized ducts choke airflow. Oversized ducts create pressure problems. We calculate the right size based on your equipment and square footage.
Installation means pulling out old ductwork and replacing it with properly sealed, insulated runs. We use mastic sealant at every joint, not just tape that peels off in the heat. Insulation goes on every supply line to protect against attic temperatures.
Before we leave, we test the system. We check static pressure, measure airflow at each vent, and make sure temperatures are balanced across your home. You’ll know the job was done right because you’ll feel the difference immediately.
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You get a full attic assessment before any work starts. We measure existing ductwork, test for leaks, and calculate what your system actually needs based on your home’s layout and your HVAC equipment.
Installation includes removing old ducts, installing new sealed ductwork with proper insulation, and connecting everything to your existing HVAC system. We handle supply lines, return ducts, and any transitions or plenums that need replacing.
In Leon Valley, attic conditions matter. Summer temperatures up here regularly hit triple digits, and your attic gets even hotter. We insulate every duct run to protect against that heat so your cool air stays cool from the air handler to the vent.
You also get a post-installation test. We check airflow, measure temperature drops, and verify that your system is moving air efficiently. Most homeowners notice the difference within hours—rooms that were always too warm suddenly cool down, and the AC doesn’t run as long to maintain temperature.
Most residential duct replacement projects in Leon Valley run between $3,000 and $6,000, depending on your home’s size and attic accessibility. That covers removing old ductwork, installing new sealed ducts, insulating all supply lines, and testing the system afterward.
Cost breaks down to roughly $20 to $60 per linear foot of ductwork. Smaller homes with straightforward attic layouts land on the lower end. Larger homes with multiple zones or difficult attic access cost more.
If you’re also upgrading your HVAC system, replacing the ductwork at the same time makes sense. You’re already paying for labor and attic access, so bundling the work usually saves money compared to doing it separately later. We’ll give you a clear quote before starting so you know exactly what you’re paying for.
Most duct replacement jobs take one to two days, depending on the size of your home and the condition of your attic. A straightforward single-story home with good attic access usually wraps up in a day. Two-story homes or properties with complex layouts might take two full days.
The process involves pulling out old ductwork, running new ducts to each vent location, sealing all connections, and insulating everything. We’re working in your attic, so we move as efficiently as possible, but we don’t rush through sealing and insulation—that’s where most duct problems start.
You can stay in your home during the work. We’ll need to turn off your HVAC system while we’re connecting new ducts, but we schedule around weather when possible. Once installation is complete and we’ve tested everything, your system goes back online and you’re good to go.
Uneven temperatures are the biggest tell. If some rooms never cool down no matter how low you set the thermostat, your ducts are probably leaking or undersized. Hot and cold spots mean conditioned air isn’t reaching where it needs to go.
High energy bills without explanation also point to duct problems. When ducts leak, your system runs longer to compensate for lost air. You’re paying to cool your attic instead of your living space. A sudden jump in your electric bill during summer often means your ductwork is failing.
Dust buildup around vents, musty smells when the AC runs, or visible damage in your attic all signal it’s time for replacement. Ducts don’t last forever, especially in Texas attics where heat and humidity break down materials faster. Most ductwork needs replacing after 15 to 20 years, sometimes sooner if it wasn’t installed correctly the first time.
Yes. Duct replacement is a separate job from replacing your air conditioner or furnace. If your HVAC equipment still works but your ducts are shot, we can install new ductwork and connect it to your existing system.
That said, if your HVAC system is more than 10 years old, it’s worth considering both at once. Older systems often have mismatched ductwork—either too small, too large, or poorly designed for the equipment. Installing new ducts gives us a chance to size everything correctly for your current system or a new one if you’re planning to upgrade soon.
We’ll assess your equipment during the initial inspection and let you know if it makes sense to replace both or just handle the ductwork. There’s no pressure either way. Some homeowners replace ducts now and plan for a new HVAC system down the road. Others do everything at once and call it done.
We handle both. Residential duct installation is our most common job—single-family homes, townhouses, and smaller properties where ductwork runs through attics or crawlspaces. We’re used to working in tight spaces and dealing with the layout challenges most Leon Valley homes present.
Commercial work is a different animal. Larger duct systems, rooftop units, and buildings with specific ventilation requirements need more planning and different materials. We’ve handled commercial duct installations for offices, retail spaces, and small industrial buildings across the San Antonio area.
Whether it’s residential or commercial, the process is the same: inspect the space, design a duct system that matches the HVAC load, install everything to code, and test it before we leave. The scale changes, but the fundamentals don’t.
Sealing works if your ducts are structurally sound but leaking at the joints. We’ll use mastic sealant to close gaps and stop air from escaping. It’s a cheaper fix and makes sense if your ductwork is relatively new or in good shape overall.
Replacement is necessary when ducts are damaged, undersized, or deteriorating. Collapsed flex ducts, rusted metal sections, or ductwork that was never the right size to begin with can’t be fixed with sealant. You need new ducts designed and installed correctly from the start.
We’ll tell you which option makes sense after inspecting your attic. If sealing gets you another five to ten years of solid performance, we’ll recommend that. If your ducts are beyond repair or poorly designed, replacement is the better investment. Most Leon Valley homes with ductwork older than 15 years end up needing full replacement, especially if the original installation cut corners on insulation or sizing.
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