Subterranean Termites

Subterranean termites are among the most aggressive and destructive wood-destroying insects in Southern California. Unlike Drywood termites, these pests require constant contact with moist soil to survive. They build elaborate underground colonies that can contain hundreds of thousands of workers, capable of causing extensive structural damage in a relatively short amount of time. Due to the size of their colonies and their relentless feeding behavior, Subterranean termites are considered a major concern for Associations, especially in areas with high moisture levels or poor drainage. Early detection and professional treatment are essential to protect your home from these destructive invaders.

A pile of Subterranean Termite Swarmers.
Subterranean Termite damage.
Subterranean mud tube.
Evidence of Subterranean termites

Why Subterranean Termites Are a Serious Threat

Subterranean termites are not just a nuisance; they're one of the most destructive pests a homeowner can face.

    • Severe Structural Damage: Subterranean termites cause more property damage in the U.S. than fires, floods, and storms combined, costing homeowners billions of dollars annually.

    • Hidden Activity: Their activity is mostly concealed within walls, crawl spaces, or under flooring, making early detection difficult without professional help.

    • Rapid Colony Growth: A mature subterranean termite colony can consume an average of one foot of a 2x4 every few months, but multiple colonies may be feeding on a single structure.

    • Moisture Dependency: These termites must maintain high humidity, so their presence is often an indicator of moisture issues within or near the home.

How Subterranean Termites Operate

Subterranean termites are highly destructive pests that thrive in the moist soil common throughout Southern California. Unlike Drywood termites, these insects rely on constant contact with moisture and build extensive underground colonies that can house hundreds of thousands of workers.

    • Cracks in concrete slabs or foundations

    • Wood-to-soil contact such as deck posts or siding

    • Expansion joints and plumbing entry points

    • Improper soil grading or drainage around the structure

      Once inside, subterranean termites quietly consume structural wood from the inside out, often going unnoticed until severe damage is discovered.

Signs of a Subterranean Termite Infestation:

While ground squirrels play roles in ecosystem functioning, their activities can have significant impacts on human-managed landscapes.

    • Burrowing can undermine foundations, irrigation systems, and leading to structural damage.

    • Feeding habits may damage crops, ornamental plants, and young trees.

    • Burrow openings can pose tripping hazards for humans and animals.

Subterranean Termite Control You Can Trust

Subterranean termites can quietly compromise the integrity of your home, so spotting early warning signs is key to preventing serious damage.

    • Thorough termite inspections

    • Customized chemical treatment plans

    • Expert recommendations for long-term prevention

    • Localized and full-soil barrier treatments using professional-grade products

    Although monitoring stations are marketed as a preventative measure, their effectiveness in eliminating or even detecting infestations remains inconsistent. We always recommend comprehensive yearly inspections and proactive steps to protect your property. Subterranean termites are not a do-it-yourself pest.

Warning signs of an Infestation

Subterranean termites can quietly compromise the integrity of your home, so spotting early warning signs is key to preventing serious damage.

    • Mud tubes (earth-colored tunnels) on foundation walls, piers, or plumbing lines

    • Bubbling paint or blistered wood surfaces

    • Swarming termites (winged reproductive termites) indoors or around windows, often in spring

    • Discarded wings found near doors, vents, or windows

    • Hollow-sounding or damaged wood when tapped

When to Call the Us:

If you suspect Subterranean termites are attacking your residence, fast action is critical. Their massive colonies can cause serious structural damage before you even notice a problem. Protect your property with expert inspection and proven treatment solutions from X Pest Defense.