Duct Leak Sealing
Located and sealed at the joints, boots and plenum connections where leakage actually occurs, rather than wrapped over and hoped for.
- Leakage Located First
- Joints, Boots & Plenums
- Mastic Rather Than Tape
- Verified After Sealing
Sealing, Repair, Balancing & Replacement
Air Duct Services
in Longview, TX
Your ductwork decides how much of the cooling you pay for actually reaches your rooms. In East Texas most of it runs through an attic that exceeds a hundred and thirty degrees in summer, which makes duct leakage one of the most expensive and least visible problems a house here can have.
- Leakage Located and Sealed
- Airflow Balancing
- Duct Repair & Replacement
- Assessed Before Equipment
Napps HVAC — Longview & East Texas since 1957
What We Do
Ductwork Services
Sealing, repair, replacement and balancing. The unglamorous half of an HVAC system, and frequently the half causing the complaint.
Duct Repair
Crushed flex, disconnected runs, collapsed insulation and the boots that were never properly sealed to the ceiling in the first place.
- Disconnected Runs Reconnected
- Crushed Flex Replaced
- Boot Sealing
- Insulation Restored
Duct Replacement
Where a system is beyond repair or was never sized correctly, replacing it properly with sizing that matches the equipment and the house.
- Sized to the Equipment
- Correct Return Capacity
- Properly Insulated
- Sealed as Installed
Airflow Balancing
The room that has never been comfortable is usually a distribution problem. Balancing addresses it without replacing any equipment.
- Room-by-Room Assessment
- Damper Adjustment
- Return Path Checked
- Measured Results
Static Pressure Testing
The measurement that reveals whether your system is fighting its own ductwork. Frequently the reason equipment underperforms or fails early.
- System Restriction Measured
- Filter Impact Assessed
- Return Sizing Checked
- Written Findings
Duct Cleaning
Recommended where there is a genuine reason — construction dust, water intrusion, rodents or visible contamination — rather than as routine.
- Recommended Selectively
- After Construction or Water
- Honest Assessment
- Sealing Considered First
Why It Matters
What Attic Ductwork Does in an East Texas Summer
The physics here are unforgiving, and they explain a surprising share of high bills and uncomfortable rooms.
A supply leak in a hot attic is money leaving the house
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Cooled air escaping from a supply duct into a hundred and thirty degree attic is air you paid to cool, delivered to the one part of your property that does not need it. A typical unsealed duct system can lose a substantial fraction of its conditioned air this way, which shows up as long run times, a system that never quite satisfies on hot days, and a bill nobody can explain. Sealing is one of the few HVAC improvements that pays back reliably.
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A return leak is worse, because it brings the attic inside
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Leakage on the return side does not merely lose air — it actively pulls hot, humid, dusty attic air into your system and distributes it through the house. That raises your cooling load, raises indoor humidity and defeats any filtration, because the contamination enters downstream of the filter. Households that dust constantly and cannot work out why very often have exactly this.
Indoor Air Quality →
The room that has never been comfortable
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Almost every house has one, and almost every homeowner has been told it needs a bigger system. Usually it needs a duct run that is not crushed, a return path that is not blocked by a closed door, or dampers set deliberately rather than left where the installer found them. Balancing costs a fraction of equipment and fixes the actual problem, which is why we test before anybody discusses tonnage.
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Ductwork sets the ceiling on your equipment
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New high-efficiency equipment connected to restrictive or leaking ductwork will not deliver its rated performance, and the disappointment usually gets blamed on the equipment. High static pressure also shortens blower and compressor life. This is why we assess ducts before quoting a system replacement, even though it sometimes complicates the sale rather than helping it.
AC Installation →Duct Problems and What They Cause
What we most commonly find in East Texas homes.
| What We Find | Effect | Fix |
|---|---|---|
| Leaking supply joints in attic | Cooled air lost, long run times | Locate and seal with mastic |
| Return-side leakage | Hot humid attic air pulled in, dust | Seal return plenum and joints |
| Crushed or kinked flex duct | One or more rooms starved of air | Replace the affected run |
| Disconnected duct run | A room with almost no airflow | Reconnect and seal properly |
| Undersized return | High static pressure, poor capacity | Add or enlarge return path |
| Compressed attic insulation | Heat gain across the duct wall | Restore or replace insulation |
📅 Call 903-758-6482
Or call 903-758-6482 — 24/7
How It Works
How a Ductwork Assessment Works
Measured, inspected, and reported with the cheap fixes identified first.
1
Measure Static Pressure and Airflow
Establishes whether the system is fighting its ductwork before anybody opens an attic hatch.
2
Inspect the Accessible System
Joints, boots, plenums, flex runs and insulation, with attention to the return side where leakage costs most.
3
Report Findings and Priorities
What matters, what does not, and what will give you the largest improvement for the smallest spend.
4
Repair, Seal or Balance
Work carried out and results verified by measurement rather than assumed from appearance.
Symptoms
Signs Your Ductwork Is the Problem
These complaints are usually distribution rather than equipment, which is good news financially.
One room never gets comfortable
A crushed run, a blocked return path or dampers nobody has ever adjusted. Rarely a capacity problem.
Bills higher than the house should justify
Supply leakage into the attic is the most common invisible cause of this in East Texas.
Persistent dust despite regular cleaning
Return-side leakage pulling attic air into the system, past the filter.
Humidity stays high even with the AC running
Return leakage bringing humid attic air in faster than the system can remove it.
Weak airflow from most vents
High static pressure — restrictive ducts, undersized returns or an overly dense filter.
Whistling or roaring at the vents or air handler
A restriction the system is fighting. Audible restriction is measurable restriction.
What We Check
Total external static pressure
The single most informative measurement on a duct system, and rarely taken.
Supply and return leakage
Located at joints, boots and plenums, with the return side prioritised.
Return air capacity
Undersized returns are extremely common and limit everything downstream.
Duct insulation condition
Compressed or missing insulation in a hot attic costs capacity even where the duct does not leak.
Why Napps?
Why Choose Napps for Ductwork
We measure before recommending, and we will tell you when the ducts are the real problem.
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Measured, Not Guessed Static pressure and airflow numbers behind every recommendation we make.
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Cheap Fixes Identified First Balancing and sealing frequently solve the complaint for a fraction of an equipment quote.
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Honest Before a System Sale If the ducts will limit new equipment we say so before you buy it, even when that complicates the sale.
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Licensed & Insured — TACLA 72668C Texas licensed HVAC, at the same Longview address since 1957.
TACLA 72668C
NATE Certified
Bryant Factory Authorized
ACCA Member
Since 1957
65+
Years Serving East TX
24/7
Emergency Availability
★ 4.8
From 229 Google Reviews
2
TX Licences — HVAC & Plumbing
📅 Call 903-758-6482
Or call 903-758-6482 — available 24/7
What Longview Says
Real Reviews from Real Napps Customers
4.8 out of 5 · 229 Google reviews
These come straight from our Google Business Profile — unedited, and updated automatically as new reviews come in.
Common Questions
Air Duct Questions
What East Texas homeowners ask about ductwork.
How much conditioned air can leaky ducts lose?
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Enough to matter substantially. Duct systems that have never been sealed commonly lose a significant share of their conditioned air into the attic, and in East Texas that air is being delivered into a space over a hundred and thirty degrees. The exact figure depends on your system, which is why we measure rather than quote a national average at you. What is consistent is that sealing is one of the few improvements that reliably pays for itself.
Why is one room in my house always hot?
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Nearly always a distribution problem rather than a capacity one. Common causes are a crushed or kinked flex run, a duct that has come apart in the attic, a return path blocked when the door is closed, or dampers still set where the installer left them years ago. All of those are far cheaper to fix than the larger system people are often told they need.
Should I seal my ducts or clean them?
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For most houses, sealing. It reduces energy loss, improves comfort and stops attic air entering the system, which also addresses the dust that made you consider cleaning. Cleaning is genuinely worthwhile after construction work, water intrusion, rodent activity or where there is visible contamination — but as routine annual maintenance on a sound system it changes very little.
Do I need new ductwork or can it be repaired?
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Most duct systems can be repaired and sealed rather than replaced. Replacement makes sense where the ducts are badly deteriorated, were undersized for the equipment from the start, or where the layout cannot deliver air to part of the house. We assess and tell you which situation you are in, with the reasoning.
Will sealing my ducts lower my energy bill?
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In East Texas, usually yes, and often noticeably, because the ducts run through an extremely hot attic and every leak is a direct loss. The size of the improvement depends on how leaky the system was to begin with. We measure before and verify after, so you get a real answer rather than a claim.
Should ductwork be checked before replacing my AC?
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Yes, and it frequently is not. New equipment on restrictive or leaking ductwork will not deliver its rated performance, and high static pressure shortens blower and compressor life. Assessing the ducts first means the new system performs as specified rather than disappointing everybody involved.
Cleaning, air quality and the systems your ducts serve.
Ductwork Problems? Call 903-758-6482.
We measure static pressure, find the leaks, and fix the cheap causes before discussing equipment.
Get In Touch
Request a Ductwork Assessment
Tell us which rooms are uncomfortable and whether the problem is year round. Both narrow the cause considerably.
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24/7 Emergency Line 903-758-6482
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Office Location 1003 West Cotton St., Longview, TX 75604
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Emergency Service Available 24 hours a day, 7 days a week
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Financing Available Financing available on duct replacement and system work