A century-old family tomb in New Orleans' Metairie Cemetery can crack and shed its plaster skin as the soft gumbo soil beneath it settles; a bronze plaque on a Gulf Coast veteran's marker corrodes green from salt air and humidity instead, with no soil movement involved. A headstone cleaning visit anywhere in Louisiana, whether in a New Orleans cemetery or a rural bayou parish, is backed by the same $2,000,000 liability policy and ICCFA membership Tending carries to all 5,017 of the state's cemeteries. Which fix actually helps a Louisiana headstone depends on what's really behind the damage.
How Louisiana's Wet Ground and Humid Air Wear Down a Headstone
Much of Louisiana sits on soft river silt and clay locals call gumbo, ground so wet and unstable that New Orleans cemeteries developed a tradition of burying their dead above ground in family tombs. Insects and humidity work on tombs and ordinary headstones alike across the state, and coastal salt air reaches bronze through its own separate chemistry.
New Orleans Tomb Settling and Headstone Restoration
New Orleans sits below sea level in places, on ground so waterlogged that early settlers couldn't dig a standard six-foot grave without hitting water. Cemeteries across the city responded by building above-ground family tombs out of brick, finished with a thin coat of plaster and whitewash. The plaster skin is brittle and thin, and it separates easily from the brick underneath once water finds its way behind it. The soft gumbo soil the tombs were meant to avoid still works on them from below, since even an above-ground structure needs a foundation, and that foundation settles unevenly as the ground shifts with the seasons. A settling foundation cracks the brick shell, and once a crack opens, the fragile plaster around it starts to flake and fall away in chunks. New Orleans' historic St. Louis cemeteries hold some of the oldest above-ground tombs in the city, with the first dating back to 1789, so their foundations have had well over two centuries of seasonal shifting to work with. Cleaning these tombs by machine only makes the damage worse, since a pressure washer blasts the soft plaster straight off the brick along with whatever grime it was meant to remove. Crews clean by hand instead, lifting grime with soft bristles that never touch the lime mortar or whitewash underneath. Headstone restoration repairs the structure underneath first, patching cracked brick and settled foundations before any new plaster or whitewash goes back on top.
Bayou Mud Dauber Nests and Headstone Lettering Repair
Mud daubers build nests everywhere across Louisiana's bayou country, gathering wet clay from the water's edge and packing it into any sheltered crevice they can find, including the carved grooves of an engraved headstone. A nest built directly inside a letter or number dries within days into something close to hardened cement, filling the groove and erasing whatever was carved there. A single dauber can build several nests across one headstone in a season, and a family plot near standing water tends to draw the heaviest nest-building activity in a cemetery. Scraping the dried clay out risks chipping the surrounding granite, since the dauber's mud bonds nearly as hard as the stone itself once it cures. Water alone barely softens a fully cured nest, since the clay was built to withstand rain in the wild long before it ever landed on a headstone. Soaking the nest gradually turns the hardened clay back into a soft slurry that rinses out of the letter without any scraping at all, and headstone lettering repair clears every groove by hand until the name and dates are fully legible again.
Gulf Coast Salt Air and Bronze Marker Restoration
Louisiana's Gulf Coast parishes take a steady dose of salt-laden air on top of the state's already heavy humidity, and the combination gives a bronze plaque's protective coating very little chance to hold up. Once the coating fails, the bare bronze underneath doesn't develop the attractive brown-green patina collectors prize on outdoor sculpture; salt and moisture instead turn it a chalky, sickly green that keeps spreading as long as it's left alone. That chalky corrosion is a sign the metal itself is actively dissolving beneath a surface that only looks discolored. The crew strips the corrosion down to bare, sound metal, then polishes the bronze back to a bright shine before locking it in with a marine-grade lacquer, the same coating used on boat hulls and other hardware built to survive constant salt exposure. Bronze marker restoration finishes every Gulf Coast plaque this way, since anything less gives the salt air an opening within a season or two.