Termite damage is not covered by standard homeowners insurance in Alabama. The average repair cost is $3,000–$8,000. Severe structural damage runs $20,000+. Early detection is the only cost-effective defense.
Alabama ranks among the top five states in the country for termite damage — and Huntsville's Madison County is firmly in the "Very Heavy" termite pressure zone. The challenge is that subterranean termites do their work hidden inside walls, floors, and foundations, completely out of sight. By the time most homeowners notice a problem, damage has been occurring for years.
Here are the seven warning signs that most Huntsville homeowners miss — and what to do if you find any of them.
Sign 1 — Mud Tubes on Foundation Walls
This is the most reliable and definitive sign of subterranean termite activity. Mud tubes — pencil-width tunnels made of soil, wood particles, and termite saliva — allow termites to travel from the soil to the wood in your home while maintaining the moisture they need to survive. They appear on foundation walls, concrete block, piers, and any surface connecting the soil to the structure.
Check your crawl space or basement foundation walls, piers, and any exposed concrete. Look particularly in corners, behind insulation batts, and along plumbing penetrations. Breaking open a mud tube and checking for live termites inside will confirm active versus abandoned infestation. Even an empty mud tube should be reported to a pest control company — it indicates past or nearby activity.
Sign 2 — Swarmers or Discarded Wings
Termite swarmers — winged reproductive termites — emerge in large numbers in spring to start new colonies. In Huntsville, this typically happens from late March through May, often within a day or two of a warm rain event. Swarmers are attracted to light and are often found near windows, doors, and light fixtures.
More subtle — and more commonly missed — are piles of discarded wings. After landing, termite swarmers shed their wings immediately. Finding small piles of equal-length wings near windowsills, door frames, or on floors is a strong indicator that swarmers emerged from inside your structure. See our recent article on what to do if termites are swarming in Huntsville right now.
Sign 3 — Hollow-Sounding Wood
Termites eat wood from the inside out, leaving a paper-thin outer shell while consuming the structural interior. Tapping wooden surfaces — baseboards, door frames, floor joists, support beams — with a screwdriver handle produces a distinctly hollow sound when termites have been active inside. In severe cases, pressing a screwdriver into the wood will puncture through with minimal resistance.
Focus your checks on areas near moisture sources: around windows, along exterior walls, near bathrooms, and in crawl spaces near HVAC condensate lines. These are the areas where termites find the moisture they need to establish galleries in wood.
Sign 4 — Tight-Fitting Doors and Windows
This sign is one of the most commonly overlooked. As termites damage wood and their galleries cause moisture to accumulate, door frames and window frames can warp — making previously easy-to-open doors or windows suddenly stick or require extra force. Homeowners often attribute this to seasonal humidity changes or settling, missing a significant termite warning sign.
If multiple doors or windows in the same area of the house have become difficult to open or close, and the problem appeared gradually over months rather than seasonally, it warrants a professional inspection.
Sign 5 — Blistered or Bubbling Paint
Subterranean termites maintain high humidity in their galleries as they work through wood. This moisture accumulates in wall cavities and can cause paint on the surface to blister, bubble, or appear water-damaged even without any plumbing leak or moisture intrusion from outside. If you have blistered paint on interior walls — particularly on lower sections of walls near floors — and there's no identifiable moisture source, termite activity is worth ruling out.
Sign 6 — Frass (Termite Droppings)
While subterranean termites — the primary species in Huntsville — don't typically leave frass visible to homeowners (they use their droppings in mud tube construction), drywood termites do. Drywood termites push their droppings out of small kick-out holes, creating tiny piles of what looks like sawdust or coarse sand near wood surfaces. If you find these piles near wood furniture, door frames, or windowsills — and there's no obvious sawdust source — have it inspected. Drywood termite infestations in North Alabama are less common than subterranean but do occur.
Sign 7 — Sagging Floors or Ceilings
This is a late-stage warning sign that indicates significant structural damage has already occurred. Sagging, spongy, or bouncy floor sections — particularly over crawl spaces — indicate that floor joists or subfloor material have been significantly weakened. Sagging ceilings in lower-floor rooms may indicate roof structure damage from an upper-level infestation.
If you notice either of these signs, a pest control inspection should be scheduled immediately — but structural assessment by a licensed contractor may also be necessary to determine the extent of damage before repair costs can be estimated.
What to Do If You Find Any of These Signs
Contact at least two licensed pest control companies for inspections. Most Huntsville companies offer free termite inspections. During the inspection, ask the inspector to show you any evidence they find and explain what treatment they recommend and why. Do not sign a treatment contract on the day of the inspection — get the quote in writing and compare before committing.
See our complete termite guide for Huntsville homeowners for a full explanation of treatment options, termite bond types, and what fair pricing looks like in Madison County.
Read Our Complete Termite Guide
Treatment options, termite bond types, and what fair pricing looks like for North Alabama homeowners — all in one place.
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