Ductwork Near the Basin
Henderson’s location at the edge of the Atchafalaya Basin gives it a climate character all its own. The moisture from the basin amplifies the already high humidity that characterizes south Louisiana, and that humidity affects your home’s HVAC system in ways that aren’t always obvious.
Your ductwork is particularly vulnerable. It operates in the concealed spaces of your home, attic or crawlspace, where extreme temperatures and moisture create conditions that degrade duct materials, break down connections, and reduce insulation effectiveness over time.
Most Henderson homeowners don’t think about their ducts until something goes wrong: a room that won’t cool, an energy bill that spikes, or a musty smell that seems to come from the vents. By that point, the ductwork has usually been deteriorating for years.
Crawlspace and Raised-Home Challenges
Many Henderson homes, especially older ones, are raised construction with ductwork running beneath the floor through crawlspaces. Crawlspace environments near the Atchafalaya Basin present unique challenges for ductwork.
Ground moisture migrates upward, creating high humidity levels in enclosed crawlspaces even when a vapor barrier is present. That moisture attacks duct insulation from the outside, promotes corrosion on metal fasteners and fittings, and can support mold growth on duct surfaces. Animals that access the crawlspace can tear through flex duct outer jackets, exposing insulation and inner liners to the elements.
We inspect crawlspace ducts for all of these issues and repair or replace damaged sections. Mastic sealing at joints works well in humid conditions, maintaining its bond where tape would fail. For insulation on crawlspace ducts, we use materials with vapor barriers oriented correctly to shed moisture rather than trap it against the duct surface.
Attic Ducts in Henderson
Newer Henderson homes on slab foundations typically have ductwork in the attic, which faces the opposite extreme: intense heat rather than moisture. Attic temperatures exceeding 140 degrees in summer stress duct connections, degrade insulation, and warm the conditioned air flowing through the system.
The standard R-8 insulation requirement for Louisiana attic duct runs is the minimum. In Henderson, where the moisture content of the air makes condensation more likely on cold duct surfaces, adequate insulation serves double duty: it prevents heat gain into your conditioned air and stops condensation from forming on the exterior.
We test duct systems using pressurized leakage measurement to quantify air loss, then inspect every accessible section for physical problems. The combination of hard data and visual assessment tells us exactly what your system needs.
Duct Sizing for Proper Dehumidification
An often-overlooked aspect of ductwork in basin-adjacent communities like Henderson is its effect on dehumidification. Your AC system removes humidity from the air as a byproduct of cooling. But if your ducts are oversized, the air moves too slowly through the system, and the AC cools the space quickly without running long enough to adequately remove moisture. The result is a home that reaches the set temperature but still feels clammy.
Properly sized ductwork, calculated using Manual D methodology, ensures the right air velocity for both temperature control and moisture removal. When we design duct systems or evaluate existing ones in Henderson, humidity control is always part of the conversation.
For homes where duct modifications are needed, we fabricate custom metal components in our sheet metal shop to match the exact dimensions your system requires.
Henderson Ductwork Service
F & R Air Conditioning provides ductwork evaluation and repair for homes throughout Henderson and St. Martin Parish. If your home’s comfort or efficiency has declined, your ducts may be the reason. Call (337) 893-5646 to schedule an assessment.