Water damage restoration in Slidell

The city's municipal area sits only about 2 miles inland, with a general elevation of about 13 feet. ^[1] That elevation is an average and hides lower ground closer to the water. Encyclopedic accounts describe Slidell as vulnerable to hurricanes because of its low elevation, ^[1] and residents who lived through 2005 hardly need convincing.

Rain is the everyday version of the same problem. With about 66 inches of precipitation in a typical year, ^[1] Slidell is wet by national standards, and the surrounding bayous and marsh leave limited room for water to go when the lake is pushed high by wind. When the lake is up and rain falls at the same time, drainage has to work against that high water.

The climate is humid subtropical, with mild winters and hot, humid summers. ^[1] For a wet house, that climate means little help from outdoor air for much of the year. A home closed up without power after a storm can turn damp very quickly, and that is often when the mold clock becomes the main concern.

On August 29, 2005, storm surge exceeding 10 feet reached parts of the city, and unincorporated areas to the south and east saw 13 to 16 feet. ^[1] Water at those depths damaged homes well beyond the waterfront. Rebuilding produced the mix visible today, with elevated homes standing on tall foundations next to older houses that sit close to the ground.

That variety matters when water comes in again. A home raised after 2005 may be safe from a moderate flood but could store things below, have mechanical equipment on platforms and have wet insulation or wiring beneath the floor. An older slab may flood at much lower water levels. Tell your contractor what kind of home you have, and if it has been raised, when.

Past floods can also leave behind hidden issues. Framing that was dried quickly under difficult conditions may show old stains, and it can be confusing to work out what is old and what is new. Photos, meter readings and your own memories help separate previous damage from the current event, and this matters for any insurance claim.

If your home is raised, water that reached the area below it may have done more than you can see from upstairs. Fiberglass insulation sags when wet, ducts can fill with water or come loose and wiring may have been underwater. Have an electrician check anything that was submerged before you use it.

After the water drops, silt coats the soil and piers, and that layer stays damp. Moving air through it without cleaning it first does little. Our crawlspace drying page explains how contractors deal with this, including removing wet insulation and laying a vapor barrier where it suits the home.

Enclosures below elevated homes also need a mention. Areas used for parking or storage are often built on the assumption that water may pass through them. If your enclosure has drywall or stored items, those may have soaked up flood water. Insurance for items below an elevated floor can be limited, so ask your flood carrier what applies.

Many addresses described as Slidell are outside the city limits. The surge figures for unincorporated areas to the south and east show how much this distinction is used, ^[1] and it matters in practice too. The city and the parish each handle their own building and floodplain matters, so your first step is to find out which applies to your address.

Substantial damage rules matter most here. In a mapped flood zone, a home damaged beyond a certain proportion of its value may have to meet current elevation standards when rebuilt. Mandeville's experience, also in this parish, suggests elevation and floodplain rules can sharply reduce repeat losses. ^[4] Talk with the relevant floodplain office before you rebuild; it is far easier to ask early than to redo work.

Drainage districts and homeowner associations can add further layers, for example on fill, fencing or exterior changes. Ask about these if your repair goes beyond restoring the home to its former state.

The city has some industrial history worth knowing, though it should not cause alarm. A former creosote plant polluted a nearby bayou and became an EPA Superfund site, which was cleaned up during the 1990s, with Heritage Park built on the site afterward. ^[1] That history is a reminder that flood water anywhere can carry whatever is upstream, from fuel to farm chemicals, and is one reason the EPA treats it with care. ^[3]

Keep to the basics. Wear boots and gloves. Wash hands before eating. Throw out food touched by flood water, and do not drink well water until it has been tested. Generators belong outdoors and far from windows, as carbon monoxide is a real danger in the days after a storm. ^[5]

The EPA's 24 to 48 hour drying window ^[6] is hard to meet when roads are closed and the power is off. If you cannot get equipment running, opening up wet walls and removing soaked materials becomes your best defense. Our mold prevention page describes what is reasonable for a homeowner to do and when to stop.

Do not mistake a lack of visible mold for dryness. Growth can begin behind baseboards and under flooring where it cannot be seen. A persistent musty smell in a room that looks fine is worth following up, particularly in a home that was flooded before.

To the west along the Northshore are Covington and Mandeville, where rivers play a bigger part. Across the lake lie New Orleans and Metairie and Kenner. Each has its own local rules and flood history, so read the relevant page if your property is elsewhere.

Seven inches of snow is rare here, ^[1] and roofs, gutters and pipes were not built with it in mind. If you found a stain or a split line that week, keep your photos and dates, since a later leak may trace back to it. Look at attic lines and any plumbing under a raised floor, which were the most exposed to that cold, and check them again after the next hard freeze, since a cracked fitting may hold for a while before it finally starts to leak badly.

Slidell was founded in 1882 and 1883 during construction of the New Orleans and Northeastern Railroad and chartered in 1888, ^[1] and NASA facilities in the 1960s nearly tripled its population within ten years. ^[1] Those two growth periods help explain the housing you see today: a small older core near the tracks, and large areas of later slab subdivisions built quickly around it. Older buildings near the railroad may have raised wooden floors and old finishes, so test for lead and asbestos before opening them up, while 1960s homes more often have water spreading across a slab and into drywall, where the wet drywall guide applies directly.

Lake Pontchartrain is a shallow body of water, and strong winds can push it toward one shore or another. ^[7] When a persistent wind holds water against the northeast shore, drainage from nearby bayous and ditches slows down, even if the storm is not a hurricane. People near the marsh may see yards hold water longer than the rainfall alone seems to explain.

This matters for how you read a forecast. A heavy rain arriving during a high lake level is more of a concern than the same rain on a calm day. If your street has a history of holding water, watch both the rainfall forecast and any coastal flood notices from the National Weather Service. Lift stored belongings and move cars ahead of time, as these are simple steps that take minutes and can prevent a claim altogether.

A 13-foot average elevation ^[1] does not describe your lot. Find your own number from an elevation certificate or a surveyor, since flood policies, floodplain rules and your own planning all depend on it. Compare it with the depth reported in your neighborhood in 2005 if you can, and with the base flood elevation shown on official maps. That one comparison tells you more about your exposure than any general description of the city could.

Katrina dominates local memory, but later storms have mattered too. Surges from Isaac in 2012 and Ida in 2021 reached the parish's lakefront, as Mandeville's record shows, ^[4] and Ida left many households without electricity for a long stretch. Nine people in St. Tammany Parish were hospitalized with carbon monoxide poisoning and one person died from lack of oxygen linked to the outage. ^[8]

Those numbers carry a plain lesson for anyone restoring a home after a storm. A wet house in the heat with no power is uncomfortable, and it can be tempting to bring a generator closer or to stay on when you should not. If anyone in the household relies on powered medical equipment, plan for somewhere else to go, well before a storm arrives and not after.

Plenty of Slidell homes went through a hurried rebuild while contractors, materials and inspectors were all stretched thin. Many of those repairs were done well, but it is reasonable to look closely if you bought one later without knowing its history. Ask the seller or look through permit records for what was done, and check for signs such as uneven drywall lines around 2 to 4 feet up the wall, which can show where a flood cut was patched.

When new water arrives, an old repair changes the assessment. Older framing may carry dark stains that read dry on a meter, and these are not a new problem in themselves. Conversely, a wall rebuilt with new board over framing that never fully dried may hold a pocket of older growth. Opening a small inspection hole answers the question with far less disruption than opening a whole wall, and it gives your insurer a clear picture of what belongs to the current event.

Low subdivisions near bayous can hold water in yards long after a storm has gone. That matters because a slab sitting in saturated ground and a crawlspace above wet soil will both keep taking up moisture from below. Look at where your downspouts empty, whether your neighbor's fill now sends water your way, and whether drainage ditches along your street are running or blocked.

Before changing grades or adding fill, ask the proper office, since fill can be regulated in floodplains and may shift water onto a neighbor. Simple steps such as extending downspouts and clearing a culvert are usually allowed and often help. If a drainage ditch is parish or city property, report the blockage instead of clearing it yourself.

Back to all of Louisiana. Nearby pages: Baton Rouge, Covington and Mandeville, Denham Springs and Walker, Metairie and Kenner, New Orleans, Shreveport and Bossier City.

Related help for Slidell: water extraction, structural drying, sewage backup cleanup, fire damage restoration and smoke damage cleanup. First time dealing with this? Read the first hours after water damage.