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Summary
Siding installation in New Orleans, LA demands extra attention to moisture barriers, wind-load compliance, and flashing details that many contractors overlook. Big Easy Siding helps homeowners across New Orleans, LA avoid preventable installation errors that lead to water damage, storm failures, and expensive repairs.
New Orleans sits below sea level in many areas, surrounded by Lake Pontchartrain, the Mississippi River, and the Gulf of Mexico. Humidity levels regularly exceed 80%, annual rainfall tops 60 inches, and hurricane season brings sustained winds that can exceed 150 mph. These conditions expose every weakness in a siding installation that might go unnoticed in drier, calmer climates. At Big Easy Siding, we see firsthand how installation shortcuts lead to early failure on homes across Orleans Parish and surrounding neighborhoods.
Many homes in the French Quarter, Garden District, Uptown, and Mid-City were built before modern building codes existed. Retrofitting siding onto these older structures requires careful assessment of wall conditions, drainage planes, and structural attachment points. Skipping this preparation is one of the most common and costly mistakes homeowners make before a siding project even begins. Reading through a thorough pre-installation guide helps prevent these oversights.
Skipping or improperly installing a water-resistive barrier (WRB) behind siding is one of the most damaging mistakes a homeowner can make in New Orleans, where year-round humidity and heavy rainfall push moisture against exterior walls every day.
A WRB acts as the last line of defense between siding panels and your wall sheathing. In drier climates, a poorly installed barrier might go unnoticed for years. In New Orleans, trapped moisture behind siding can produce mold growth, wood rot, and structural deterioration within months. The combination of warm temperatures and sustained dampness creates an ideal environment for fungal colonies to spread through wall cavities.
Housewrap should overlap at seams with the upper layer covering the lower layer, similar to shingles, so water flows down and away rather than collecting behind the panels. Taping all seams with manufacturer-approved tape is mandatory, not optional, in a climate this wet.
Siding installed less than six inches above grade traps moisture against the bottom edge of the panels, leading to swelling, cracking, and accelerated decay that spreads upward over time.
New Orleans properties often have limited clearance between soil level and the first course of siding, especially in older Creole cottages and shotgun houses. When siding sits too low, it absorbs moisture from the soil through capillary action, and rain splashback keeps the bottom panels perpetually damp. Maintaining at least six inches of clearance between the lowest siding edge and finished grade is essential for allowing airflow and preventing ground-level moisture problems.
Yes. Orleans Parish falls within a wind zone requiring siding to withstand basic wind speeds of 150 to 160 mph under the 2021 International Building Code adopted by the city, which means standard fastening schedules used in lower-wind regions are not sufficient.
Siding panels must be secured with corrosion-resistant fasteners driven into structural framing, not just sheathing. Nail spacing, penetration depth, and fastener type all matter. Using galvanized or stainless steel fasteners prevents the rust and corrosion that happen quickly in New Orleans’ salt-air environment. Ring-shank nails provide significantly better pullout resistance than smooth-shank nails, which is critical during hurricane-force gusts.
Many installation failures during storms trace back to fasteners that were placed too far from panel edges, spaced too widely apart, or driven into non-structural backing. Each of these mistakes reduces the wind resistance of the entire siding system. Understanding what the best siding materials for extreme weather require in terms of attachment helps homeowners ask the right questions before work starts.
Hurricane strapping connects siding and wall cladding systems to the structural frame of the house, preventing panels from peeling away during high-wind events, yet it is frequently omitted during siding installations in the New Orleans area.
Proper wind-load compliance involves more than just nailing siding to the wall. In coastal Louisiana, the entire exterior envelope should work as a connected system: foundation to framing, framing to sheathing, sheathing to WRB, and WRB to siding. When any link in this chain is weak, wind can find an entry point and peel siding off in large sections.
Contractors who are unfamiliar with Louisiana’s coastal building requirements sometimes install siding using inland fastening schedules. This leaves homes vulnerable when tropical storms and hurricanes push wind-driven rain horizontally against exterior walls. Checking a contractor’s familiarity with local wind-load codes before signing a contract protects your investment. Our guide on choosing the right siding contractor covers what to look for.
Kickout flashing diverts water away from the wall at roof-to-wall intersections, and missing or undersized kickout flashing is one of the leading causes of hidden water damage in New Orleans homes.
New Orleans receives over 60 inches of rain annually, and much of it arrives in intense, short-duration downpours during summer and hurricane season. At every point where a roof slope meets a sidewall, water concentrates and runs down the wall surface in large volumes. Without a properly sized kickout flashing directing that water into the gutter, it channels behind the siding and saturates the wall sheathing.
This damage often remains invisible for months until mold appears on interior walls or the sheathing softens enough for siding panels to sag. Every window, door, roof-to-wall junction, and penetration in the exterior envelope needs appropriate flashing to handle the volume of water New Orleans homes face.
Poor caulking around windows, doors, and utility penetrations allows water infiltration that undermines even the best siding installation, especially in a climate where rain is driven sideways by strong winds.
Not all caulks perform the same in high-heat, high-humidity conditions. Silicone-based and polyurethane-based sealants hold up far better than basic acrylic caulk in New Orleans’ climate. The sealant must remain flexible through wide temperature swings, from near-freezing winter nights to 95-degree summer afternoons, without cracking or pulling away from the substrate.
Applying caulk in direct afternoon sun or during high-humidity conditions can cause it to skin over before bonding properly to the surface. Timing the application for early morning or overcast conditions produces a more reliable seal. When combined with proper fiber cement installation techniques, correct sealing protects the entire wall assembly.
Low-grade vinyl and untreated wood siding deteriorate fastest in Southeast Louisiana because they cannot handle the combined assault of UV radiation, sustained humidity, wind-driven rain, and temperature extremes that define the region’s weather.
Economy vinyl panels become brittle and crack under years of intense UV exposure, and they can warp or buckle when heat builds up against dark-colored surfaces. Untreated wood absorbs moisture rapidly in New Orleans’ humidity, making it vulnerable to rot, mold, and termite damage, with Formosan subterranean termites posing a particularly aggressive threat in Orleans Parish.
Fiber cement and insulated vinyl perform significantly better in this environment. Fiber cement resists moisture, fire, insects, and wind while maintaining its appearance for decades. Insulated vinyl provides better impact resistance and thermal performance than standard vinyl. Matching the material to Louisiana’s conditions from the start prevents premature replacement. For vinyl siding installation, technique matters as much as material grade.
Selecting siding based solely on the lowest bid often results in substandard materials, rushed installation, and failures that cost more to repair than the original savings.
In New Orleans, the cheapest option is rarely the most cost-effective option over time. A low-cost installation that fails during hurricane season can expose your home’s interior to catastrophic water damage, force an emergency replacement at premium pricing, and leave you without adequate protection during the most dangerous months of the year. Weighing material quality, installation standards, and warranty terms alongside price gives a more accurate picture of long-term value.
Louisiana requires contractors performing siding work above a certain dollar threshold to hold a valid state license, and hiring an unlicensed installer exposes you to liability, voided warranties, and potential code violations.
The Louisiana State Licensing Board for Contractors oversees licensing requirements. Verifying that your contractor holds the appropriate classification, carries adequate insurance, and has experience working in coastal wind zones protects you if something goes wrong during or after installation. An unlicensed contractor may also lack familiarity with the specific wind-load and moisture management requirements that apply to Orleans Parish. Our contractor selection tips walk through the verification process step by step.
Installing new siding over damaged sheathing, rotted framing, or active moisture problems locks those issues behind a new exterior surface where they continue to worsen invisibly.
New Orleans homes, especially those built before the 1960s, frequently have hidden moisture damage, termite activity, or structural settlement that affects wall surfaces. A thorough pre-installation inspection identifies these problems so they can be corrected before new siding goes up. Covering over existing damage is one of the most expensive mistakes a homeowner can make, because the cost of tearing off brand-new siding to access rotted framing far exceeds the cost of repairing it beforehand.
Every siding installation mistake on this list is preventable with proper planning, the right materials, and an installer who understands what Louisiana’s climate demands. From moisture barriers and kickout flashing to wind-rated fasteners and code-compliant attachment, the details matter more here than in most parts of the country.
Big Easy Siding works with homeowners throughout the New Orleans area to install siding that handles humidity, heavy rain, and hurricane-force winds without cutting corners. Whether you are replacing storm-damaged panels or planning a full re-side of an older home, we make sure every step meets the standards your home needs to stay protected.
We serve New Orleans, Baton Rouge, Covington, Gretna, Hammond, Kenner, Metairie, Slidell, and throughout Louisiana.
Call us at (504) 766-3494 or request a free estimate online to make sure your siding installation is done right the first time.
Inadequate moisture barriers are the most common mistake. New Orleans’ high humidity and heavy rainfall push water against exterior walls constantly, and a missing or improperly installed water-resistive barrier allows moisture to reach the sheathing and framing, causing mold, rot, and structural damage.
Yes, most siding replacement or installation projects in New Orleans require a building permit from the city. The permit process ensures your installation meets the wind-load and moisture management standards required under the 2021 International Building Code adopted by Orleans Parish.
Louisiana’s coastal wind zones require siding to withstand basic wind speeds of 150 to 160 mph. This means using corrosion-resistant fasteners, tighter nail spacing, attachment to structural framing rather than sheathing alone, and proper hurricane strapping to prevent panel uplift during high-wind events.
Kickout flashing at roof-to-wall intersections, drip-edge flashing above windows and doors, and step flashing along angled roof lines are all essential in rain-heavy climates like New Orleans. Each type directs water away from vulnerable wall areas where moisture can penetrate behind siding panels.
Signs of incorrect installation include panels that buckle or warp in hot weather, visible gaps between panels, water stains on interior walls, mold growth at the base of exterior walls, and siding that rattles or feels loose during strong winds. Any of these symptoms warrants a professional inspection.
By Admin 
Jan 31, 2023