Termites

7 Early Signs of Termite Damage in Gulf Coast Homes

Subterranean and Formosan termites cause billions in damage nationwide every year, and Gulf Coast homes are prime territory. Here is what to look for before the damage gets structural.

Why Gulf Coast homes are at high risk

The Gulf Coast's combination of warmth, humidity, and sandy or moisture-heavy soil makes it one of the most termite-active regions in the country. Subterranean termites nest underground and travel into homes through foundation gaps, while drywood termites fly straight into attics and wall voids. The Gulf states are also the front line for the aggressive Formosan subterranean termite, which builds large colonies and spreads from Houston to New Orleans to the Florida coast. All of them stay active essentially year-round, with major swarm seasons in spring and early summer.

1. Mud tubes on the foundation

Subterranean termites build pencil-width tunnels of soil and saliva up foundation walls, in crawl spaces, and along plumbing penetrations. These mud tubes protect them from sunlight as they travel between soil and wood. If you snap one open and see pale, soft-bodied insects, the colony is active right now.

2. Discarded wings on windowsills

After a swarm, reproductive termites shed their wings. Piles of small, uniform, translucent wings on windowsills, in spider webs, or near exterior lights are a strong sign a colony swarmed nearby — possibly inside your walls. On the Gulf Coast, Formosan swarms cluster around lights on warm, humid spring evenings.

3. Hollow-sounding or blistered wood

Termites eat wood from the inside out, leaving a thin shell. Tap baseboards, door frames, and window trim with a screwdriver handle: a papery or hollow sound is a warning. Paint that bubbles or blisters with no water source nearby can also signal tunneling just beneath the surface.

4. Frass (drywood termite droppings)

Drywood termites push their droppings out of small kick-out holes. Frass looks like fine sawdust or ground pepper and accumulates in small cone-shaped piles below infested wood — commonly on windowsills, under eaves, and inside closets.

5. Sticking doors and windows

As termites tunnel through frames, the moisture they introduce warps the wood. A door or window that suddenly binds in its frame — without a humidity swing or settling event to explain it — deserves a closer look.

6. Sagging floors or ceilings

Advanced infestations weaken structural members. Soft spots underfoot, dipping ceiling lines, or new cracks where walls meet ceilings can indicate damage that has moved well beyond cosmetic. Formosan colonies, with their sheer numbers, can do this damage faster than native species.

7. Clicking sounds in the walls

Soldier termites bang their heads against tunnel walls to signal danger. In a quiet room, a faint, dry clicking inside a wall is occasionally audible — an eerie but useful early warning.

What to do if you spot these signs

Do not disturb the evidence. Spraying a mud tube with store-bought insecticide kills a few workers and pushes the colony to reroute, making professional treatment harder. Note the location, take photos, and have a licensed professional inspect. Treatment options — liquid soil barriers, bait systems, or fumigation for drywood colonies — depend entirely on the species and the extent of activity, which is exactly what an inspection determines.

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