Subterranean vs. Drywood Termites: Decoding Infestations in NorCal Homes

When homeowners in Northern California hear the word termites, concern is understandable. Our mild climate, seasonal moisture, and broad mix of older and newer homes create ideal conditions for termite activity. However, one important detail is often overlooked; not all termites behave the same way.

In NorCal, most infestations fall into two categories: subterranean termites and drywood termites. Knowing more about each kind and how they differ can help homeowners identify warning signs sooner and understand why professional identification is essential.

wall destroyed by termites

What This Article Covers

Why Termites Are So Common in Northern California

Northern California’s moderate temperatures, seasonal rain, irrigated landscapes, and abundant wood construction make it an attractive environment for termites. Crawl spaces, slab foundations, and aging wood elements all increase the risk.

Understanding which type of termite is present is just as important as knowing termites are there at all.

Subterranean Termites: Colonies Below Ground, Damage Inside Your Home

Subterranean termites live in large underground colonies and rely on moisture from the soil. They travel back and forth between their nest and food sources by building mud tubes, which protect them from light and dry air.

Signs of Subterranean Termites

Because their colonies are large and constantly feeding, subterranean termites can cause extensive structural damage over time if left untreated.

Drywood Termites: Living Inside the Wood You Can’t See

Drywood termites behave very differently. They don’t need soil contact or high moisture levels. Instead, they live entirely inside dry wood, often within walls, attic framing, trim, or furniture.

Signs of Drywood Termites

Drywood termite colonies are smaller than subterranean ones. Because they feed entirely inside wood, their damage develops slowly, often remaining hidden for years until signs like tiny holes or droppings appear.

Key Differences Between Subterranean and Drywood Termites

Subterranean termites

Drywood termites

Why Correct Identification Matters

Termite treatments are not one-size-fits-all. A solution designed for subterranean termites may not fully address a drywood infestation—and vice versa. Treating the wrong termite type can lead to:

Professional inspections focus on identifying the species, locating hidden activity, and assessing risk factors specific to homes in Northern California.

How NorCal Homeowners Can Reduce Termite Risk

While no home is completely termite-proof, these steps can help lower your risk:

Early detection is one of the best ways to limit damage and avoid costly repairs.

When to Call Big Time Pest Control

If you’ve noticed signs of termite activity or simply want peace of mind, a professional termite inspection is the next step. Many termite infestations cause damage long before visible signs appear, especially in Northern California’s favorable climate.

Here at Big Time Pest Control, we offer comprehensive termite control solutions for both species of termites. We bring local knowledge and proven inspection and treatment methods to help homeowners in Anderson, Redding, Sacramento, and throughout Northern California identify termite activity early and protect their homes for the long term.

Contact us today to schedule your termite inspection! 

What Big Time Pest Control Customers Are Saying

big time customer in anderson california

Martin is an asset to your company! He’s very friendly and thorough and very helpful with any questions or concerns that we might have. I am very satisfied with the service he provides. Thank you to Martin and Big Time!!!!

Wayne L.

Anderson, CA

big time customer in anderson ca

Jamie from Big Time Pest Control is the "BEST!" He calls to let me know he is on his way. He listens to any bug/rodent concerns I have, then does a very thorough treatment of my entire property! Thank you Jamie and Big Time for training your team in such a thorough manner!

Cindy Lou B.

Anderson, CA

mt shasta ca pest control customer

Matt is always very thorough and willing to answer questions. He’s also the first person our dog is willing to take treats from. My dog likes you, and you get rid of my ants—that’s a win-win in my book. Thanks, Matt!

Danielle C.

Mt. Shasta, CA

happy customers of termio pest control
Get In Touch

Our Services

Big Time Pest Control provides fast, efficient, reduced-risk pest control services for homes and businesses in Northern California. Choose a service or reach out today to discuss your pest problem!

Helpful Tips & Info

Big Time Pest Control Blog