Ductwork Installation & Replacement in Marble Falls, TX
Leaky, undersized, or poorly routed ductwork undermines every dollar you spend on HVAC equipment. Highland Lakes Heating & Air designs, installs, and replaces duct systems throughout the Highland Lakes region — built to move the right amount of air to every room, every time.
Why Ductwork Matters as Much as the Equipment
Most homeowners focus on the brand and efficiency rating of their air conditioner or furnace. That matters — but a high-efficiency system connected to a leaky, undersized, or poorly routed duct system will never perform to its rated specs. The duct system is the delivery mechanism, and if it is not right, nothing downstream of it will be right either.
In the Highland Lakes region, attic duct systems are subjected to extreme heat — attic temperatures regularly exceed 130°F in summer. Flex duct that was installed without proper support or with excessive bends degrades faster here than in milder climates, and the energy penalty for leakage is steeper because the temperature differential between the conditioned air inside the duct and the attic air surrounding it is so large.
We approach every ductwork project with a proper system design — sized trunk lines, correctly routed branch runs, adequate return air capacity, and sealed connections throughout. We do not patch and hope; we fix the root cause.
What We Do
- Full duct system replacement — residential and light commercial
- New duct installation for additions, converted spaces, or new construction
- Duct sealing with mastic compound or UL-listed metal tape
- Return air upgrades — adding or enlarging return grilles and plenums
- Supply register and diffuser replacement or relocation
- Duct insulation — R-8 flex duct and rigid duct board in attic applications
- Flex duct repair and re-support
- Sheet metal trunk line fabrication and installation
- Ductwork design and layout for remodels and whole-home retrofits
Signs Your Ductwork May Need Attention
Uneven Cooling or Heating
Rooms that are always too hot or too cold despite a functioning HVAC system are often a duct problem — undersized runs, disconnected sections, or poor design.
High Energy Bills
The Department of Energy estimates that leaky ducts can waste 20–30% of conditioned air before it ever reaches living space. We find and seal those leaks.
Excessive Dust
Unsealed ductwork pulls in attic dust and contaminants and distributes them through the home. Proper sealing and routing eliminates this at the source.
Weak Airflow at Registers
Crushed flex duct, undersized trunk lines, or too many 90-degree bends restrict airflow. We diagnose the cause and correct the design.
Noisy Ductwork
Banging, popping, or whistling from ducts usually points to pressure issues, loose connections, or improperly sized supply runs.
Old or Damaged Duct System
Duct systems over 15–20 years old — especially flex duct in attics — often have deteriorated insulation, collapsed sections, or rodent damage that warrants full replacement.
Frequently Asked Questions
- How do I know if my ducts need to be replaced vs. just repaired?
- In many cases, older flex duct systems with widespread deterioration are more cost-effective to replace than to repair section by section. We inspect the full system and give you an honest recommendation — not one that defaults to the highest ticket option.
- Can new ductwork really make a noticeable difference in comfort?
- Yes — dramatically in some cases. Homes with poorly designed or heavily leaking duct systems often have chronic comfort problems that no amount of HVAC equipment upgrading will solve. A properly designed and sealed duct system is foundational to consistent comfort.
- Do you use flex duct or rigid sheet metal?
- We use both, depending on what is appropriate for the application. Rigid sheet metal main trunk lines with flex duct branch runs is the most common approach for residential attic systems in this region. We always size and route ducts correctly regardless of material.
- Will you work around an existing HVAC system or does everything need to be replaced at once?
- We can replace or repair ductwork independent of the HVAC equipment. It is common to install new ductwork alongside an existing system that still has years of life left, or vice versa.
- Do you service commercial ductwork?
- We handle light commercial ductwork for small offices, retail spaces, and restaurants. For large commercial or industrial projects, contact us and we can discuss scope.
- What areas do you serve?
- We install and replace ductwork throughout the Highland Lakes region including Marble Falls, Burnet, Kingsland, Horseshoe Bay, Llano, Bertram, Buchanan Dam, Round Mountain, Spicewood, Tow, and Johnson City.
Service Areas
We install and replace ductwork throughout the Highland Lakes region. Cities we serve include:
Ready to Fix Your Ductwork?
Serving Marble Falls, Burnet, Kingsland, and all of the Highland Lakes region. Call us or request a free quote online.
Family-owned since 1980 · Licensed TACLA69706E · American Standard Preferred Dealer