Back to guides

Pest evidence guide

Termite Damage: How to Identify It

Hollow-sounding wood, mud tubes on foundations, and discarded wings. The most destructive structural pest evidence.

DamageHigh riskUpdated July 2026
Reference imageCompare with checklist below
Termite Damage

How to use this evidence

A clear photo can support a visual comparison with known pest evidence.

A photo alone cannot confirm the source or extent of an infestation. Check for matching physical evidence nearby.

What you found

Termite damage is characterized by hollow-sounding wood, mud tubes on foundation walls, and discarded wings near windows or doors. Subterranean termites cause over $5 billion in property damage annually in the US. Early detection is critical to preventing catastrophic structural failure.

Common places to check

  • Inspect foundation walls and nearby hiding spots for matching evidence.
  • Inspect crawl spaces and nearby hiding spots for matching evidence.
  • Inspect window frames and nearby hiding spots for matching evidence.
  • Inspect door frames and nearby hiding spots for matching evidence.
  • Inspect attic and nearby hiding spots for matching evidence.

How to identify it

Wood that sounds hollow when tapped
Mud tubes (pencil-width) on foundation walls, beams, or crawl spaces
Discarded wings near windows or doors (after swarming)
Sagging floors or buckling wood surfaces
Small piles of frass (wood-colored pellets) beneath exit holes

What it may indicate

Structural context

EXTREME risk. Can compromise load-bearing walls, floors, ceilings, and foundations. A single colony can consume a foot of 2x4 in 6 months.

Property context

Over $5 billion in US property damage annually. Repair costs often exceed $3,000-$10,000 for moderate infestations.

Infestation context

Mud tubes and discarded wings indicate an active colony nearby. Swarming typically occurs in spring.

Recommended actions

  1. 1Reduce moisture: fix leaks, improve drainage, clean gutters
  2. 2Eliminate wood-to-soil contact around the foundation
  3. 3Store firewood and lumber away from the house
  4. 4Seal visible cracks in foundation walls
  5. 5DO NOT disturb mud tubes before professional inspection

Prevention and monitoring

Eliminate all wood-to-soil contact around the foundation
Maintain proper drainage away from the structure
Repair leaky pipes, faucets, and AC units promptly
Store firewood at least 6 meters from the house and off the ground
Schedule annual termite inspections by a licensed professional

Professional options

  • MANDATORY professional soil treatment with termiticides around foundation
  • Bait station systems installed around property perimeter
  • Direct wood treatment with borate-based products
  • Annual inspections and monitoring by licensed professionals
  • Foundation repair and moisture control planning

Explore pages related to Termite Damage

Follow the cluster from this evidence page to matching pest profiles and practical guides.