Professional Ductwork Replacement & Repair in Norwalk & La Mirada
Most California homes have leaky ductwork, and many homeowners don't realize it. Studies by the California Energy Commission found that the average residential duct system loses 25–40% of conditioned air through leaks and poor insulation before it reaches the living space. Ductwork replacement and repair in Norwalk and La Mirada can meaningfully reduce your energy bills while improving comfort — rooms that are always too hot or too cold often have duct problems, not HVAC problems.
We repair and replace flex duct, sheet metal duct, and fiberglass duct board systems in attics, crawl spaces, and within walls. Common duct problems include disconnected flex duct sections (often pulled loose by animals or maintenance personnel), deteriorated duct tape that has lost adhesion, crushed flex duct that restricts airflow, and completely failed insulation wrapping on metal ducts in hot attics.
Before recommending duct replacement, we perform a duct inspection — often using a camera in hard-to-reach sections — to determine whether repair or replacement is the better investment. Minor leaks can be sealed with mastic sealant; severely deteriorated systems in 1960s homes often warrant complete replacement.
Our Ductwork Replacement & Repair Process
Duct Inspection & Leakage Assessment
We inspect accessible ductwork sections, check all connections and transitions, look for disconnected runs, and assess insulation condition. We can measure overall duct leakage with a duct blower test to quantify how much air is being lost.
Repair or Replacement Recommendation
We provide a written scope of work covering what needs repair versus replacement, with separate pricing for each option so you can make an informed decision.
Duct Sealing & Repair
For leaking joints and connections, we apply UL 181-rated mastic sealant (not standard duct tape, which fails within a few years) and install appropriate duct wrap insulation on any sections with damaged or missing insulation.
Full Ductwork Replacement
For complete replacements, we size the new duct system to match your HVAC equipment, install properly insulated flex or sheet metal duct, and balance airflow to all registers. We seal all connections with mastic for a permanent result.
We serve Norwalk, La Mirada, and 20 surrounding Southern California cities. Learn more about all our HVAC services or call 562-219-4085 for same-day service.