You’ll notice the difference immediately. Rooms that used to feel stuffy in summer or cold in winter suddenly match the thermostat setting. Your AC doesn’t run constantly trying to compensate for lost air.
The typical duct system loses 25% to 40% of your heating and cooling before it even reaches your rooms. That’s not a small leak—that’s hundreds of dollars disappearing into your attic every year. When you’re replacing ducts in attic spaces in Alamo Heights, you’re not just fixing a problem. You’re reclaiming efficiency your system should have had from day one.
Properly installed ductwork means your HVAC system works less and lasts longer. It means consistent temperatures in every room. It means lower utility bills without changing how you live. And in South Texas, where your AC runs eight months a year, that efficiency compounds fast.
We’ve been installing and replacing AC ducts in Alamo Heights and throughout San Antonio for over 20 years. We’re veteran-owned, which means we approach every job with the same attention to detail and commitment we learned in service.
We’ve seen what happens when ductwork gets installed wrong the first time. We’ve pulled out systems that were undersized, poorly sealed, or routed in ways that guaranteed failure. That’s why every duct system we install is engineered specifically for your home—not guessed at or copied from a template.
Our technicians are licensed, certified, and trained on the specific challenges of Texas climate. When your attic hits 140°F in July, your ductwork needs to handle that. We know what insulation levels work, what materials last, and how to design airflow that actually reaches every room in your house.
We start with a complete assessment of your current system. That means going into your attic, measuring airflow, checking for leaks, and identifying what’s actually causing your comfort problems. You’ll get a clear explanation of what needs to happen and why.
Next comes the design phase. We calculate the exact duct sizes your home needs based on square footage, room layout, and your HVAC capacity. Every branch, every return, every supply vent gets sized correctly. This isn’t guesswork—it’s engineering.
Installation happens in stages. We remove old ductwork if you’re replacing an existing system. We install new ducts with proper supports, seal every connection, and insulate to R-10 or R-12 levels for maximum efficiency. Then we test airflow in every room to confirm you’re getting the performance you paid for. You’ll see the difference in your comfort immediately and in your energy bill within the first month.
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You’re getting a complete duct system designed for your specific home. That includes properly sized supply and return ducts, sealed connections at every joint, and insulation that meets or exceeds Texas energy code. We use quality materials that hold up in attic temperatures that regularly exceed 130°F during Alamo Heights summers.
Every installation includes airflow testing to verify each room receives the correct volume of conditioned air. We check static pressure to ensure your HVAC isn’t working harder than it should. And we seal the entire system—not just the obvious connections, but every seam and joint where air could escape.
In Alamo Heights, where homes near the Alamo Quarry Market area often have unique layouts and older construction, custom ductwork makes a measurable difference. We account for your home’s specific challenges: long duct runs, multiple stories, additions that were built after the original HVAC system. The result is balanced airflow, consistent temperatures, and efficiency that actually shows up on your utility statement.
The honest answer is it depends on your home’s size, layout, and what currently exists in your attic. Most complete duct replacements in Alamo Heights homes run between $3,500 and $8,000. That’s a wide range because a 1,500 square foot single-story home needs far less material and labor than a 3,000 square foot two-story with complex room layouts.
Here’s what drives the cost: the amount of ductwork needed, whether we’re working in a cramped attic or accessible space, and what insulation levels you choose. If your existing ducts are undersized, we’re essentially redesigning your entire air distribution system. That takes more time but solves problems that have probably frustrated you for years.
You’ll get an upfront estimate that breaks down exactly what you’re paying for. No surprises, no “we found additional issues” charges after we start. The investment typically pays for itself within 3-5 years through lower energy bills, and your comfort improves immediately.
If your ducts are more than 15 years old or you’ve been dealing with hot and cold spots, yes. Here’s why: installing a new, efficient AC system on top of leaky, undersized ductwork is like putting a powerful engine in a car with a clogged exhaust. You won’t get the performance or efficiency you paid for.
Most older duct systems in Alamo Heights homes have at least some leakage. Seals deteriorate in attic heat. Connections loosen. Insulation compresses and loses effectiveness. When you’re already investing in a new HVAC system, replacing the ducts at the same time means one installation period, one disruption, and a complete system that works together.
The alternative is replacing your AC, still dealing with comfort problems, and then having to replace ducts later anyway. That means paying for attic access twice, dealing with two separate projects, and missing out on immediate efficiency gains. If your ductwork is compromised, handle it now while you’re already upgrading your system.
Most complete duct replacements take 1-2 days depending on your home’s size and complexity. A straightforward single-story home with good attic access might be done in a day. A larger two-story home with multiple zones and tight crawl spaces might take two full days.
We work efficiently, but we don’t rush. Every connection gets sealed properly. Every section gets supported correctly. Every measurement gets verified. Cutting corners to finish faster just means you’ll have problems later, and we’re not interested in doing the job twice.
You’ll have working AC throughout the process. We coordinate the installation so you’re never without cooling for more than a few hours at a time. In Texas heat, that matters. We also clean up completely when we’re done—no insulation debris, no scrap materials left behind. You’ll have new ductwork and a clean attic space.
Flexible duct is lighter, faster to install, and works well for shorter runs and tight spaces. Metal ductwork is more durable, maintains airflow better over long distances, and lasts longer in extreme attic temperatures. The best systems use both strategically.
We typically use metal duct for main trunk lines where air travels the longest distances. That rigid construction maintains consistent airflow and doesn’t sag or compress over time. For branch lines running to individual rooms, flexible duct often makes sense—it’s easier to route around obstacles and costs less to install.
What matters more than the material is proper installation. Flexible duct that’s stretched tight, properly supported, and sealed at connections performs well. Metal duct that’s poorly connected or undersized creates problems. In Alamo Heights attics where summer temperatures exceed 130°F, we make sure whatever material we use is rated for extreme heat and insulated to at least R-8, preferably R-10 or higher.
Sometimes, yes. If your ductwork is properly sized and the only issue is leakage at connections, sealing can solve the problem for a fraction of replacement cost. But if your ducts are undersized, crushed, or deteriorated, sealing won’t fix the underlying issues.
We’ll be honest about what makes sense after we assess your system. If sealing will get you 80% of the improvement at 30% of the cost, we’ll tell you that. If your ducts are so compromised that sealing is just delaying inevitable replacement, we’ll tell you that too.
The assessment includes checking duct sizing against your home’s needs, inspecting for damage or deterioration, and measuring current airflow. You’ll get a clear recommendation based on what actually exists in your attic, not what’s easiest for us to sell. Some homes need full replacement. Some need strategic repairs and sealing. We match the solution to your specific situation.
That’s almost always a ductwork problem. Either those rooms aren’t getting enough airflow, or they’re getting too much. Both issues stem from improper duct sizing or design.
When a room is consistently uncomfortable, it usually means the duct supplying that room is undersized, crushed, or disconnected. Maybe it’s at the end of a long duct run and there’s not enough pressure left to push adequate air. Maybe the duct is buried under insulation in your attic and it’s partially collapsed. Maybe it was never sized correctly in the first place.
The fix requires identifying exactly where the airflow problem occurs and correcting it. Sometimes that means replacing a section of ductwork. Sometimes it means adding a return vent to improve circulation. Sometimes it means redesigning how air gets distributed to that part of your house. We diagnose the specific cause, then fix it properly so that room finally matches the temperature you set on your thermostat.
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