Old Ducts in a Small Town
Arnaudville is a tight-knit community of about 1,100 people where the Bayou Teche meets Bayou Fuselier. Many of the homes along Main Street, Bushville Highway, and the roads branching off toward Leonville were built decades ago, and their ductwork shows it. Flex duct that was installed in the 1980s or 1990s has likely sagged, compressed, or developed tears at connection points. Metal ductwork from the same era may have joints that have separated or mastic sealant that has cracked and fallen away.
If your Arnaudville home has rooms that stay warmer or cooler than the rest of the house, or if you notice dust blowing from the registers when the system kicks on, your ducts are probably part of the problem.
What Louisiana Attics Do to Ductwork
Your attic is the harshest environment in your home, and it’s where most of your ductwork runs. During summer in St. Landry Parish, attic temperatures routinely climb past 140 degrees. In winter, moisture condenses on surfaces as temperatures swing overnight. That cycle of extreme heat and condensation attacks duct materials relentlessly.
Uninsulated or under-insulated ducts in a 140-degree attic lose cooling capacity before the air ever reaches your vents. You set the thermostat to 72, but the air coming out of the register in your back bedroom might arrive at 80 because it traveled through 25 feet of superheated attic space. R-8 insulation on duct runs is the minimum that makes sense in this climate, but plenty of older Arnaudville homes still have ducts wrapped in R-4 or less.
The 20 to 30 Percent Problem
The Department of Energy estimates that leaky ductwork wastes 20 to 30 percent of conditioned air in a typical home. That’s air you’ve already paid to cool or heat, escaping through gaps at joints, disconnected sections, or deteriorated flex duct. In a community where many households are mindful of utility costs, that’s real money disappearing into your attic every month.
A duct leakage test measures exactly how much conditioned air your system is losing. We pressurize the duct system and calculate the leakage rate, then pinpoint where the losses are occurring. The results often surprise homeowners who assumed their higher-than-expected electric bills were caused by an aging AC unit when the ducts were the real culprit.
Sealing, Insulating, or Replacing
Not every duct problem means starting from scratch. If your existing ductwork is properly sized for your HVAC equipment and the layout follows good design practices, sealing and insulating what’s already there can recover most of the lost efficiency.
We seal joints with mastic, a thick adhesive that stays flexible and adheres permanently. Despite the name, regular duct tape is terrible for duct sealing because it dries out and peels within a year or two. Mastic lasts the life of the system.
When ducts are too far gone, undersized for the current equipment, or the original installation used shortcuts (kinked flex duct, excessive lengths, inadequate support), replacement is the better investment. F & R Air Conditioning operates a full sheet metal fabrication shop at our Abbeville headquarters. We cut, bend, and assemble custom metal ductwork sized specifically for your home rather than relying on generic components from a supply house.
Why Custom Fabrication Matters for Older Homes
Arnaudville homes weren’t built from a handful of cookie-cutter floor plans. Each one has its own layout quirks, crawlspace dimensions, and attic geometry. Off-the-shelf duct transitions and plenums often don’t fit right, leading to gaps, restrictions, and awkward bends that reduce airflow.
Custom-fabricated metal ductwork fits precisely. Every transition piece, every take-off, and every plenum is made to match your home’s actual dimensions. The result is better airflow, less turbulence, and quieter operation compared to flex duct or ill-fitting prefabricated components.
Getting Your Ducts Evaluated
F & R Air Conditioning has been building and servicing ductwork across Acadiana since 1956. We’re about 20 minutes from Arnaudville and serve the community regularly. If your system isn’t keeping your home comfortable or your electric bills seem higher than they should be, your ductwork is worth investigating. Call us at (337) 893-5646 for a duct evaluation.