You notice a strange pile of tiny pellets on your windowsill or a thin mud line creeping up your foundation, and suddenly you are wondering how much damage termites might already be doing to your Southern California home. Your mind jumps to worst-case scenarios, long days under a tent, and big repair bills. Before panic sets in, it helps to know that not every termite problem looks the same or needs the same solution.
Across Orange, Los Angeles, Riverside, and San Diego Counties, most homeowners who call us know they have “termites,” but not whether they are dealing with drywood or subterranean termites. That detail feels technical at first, yet it shapes everything that comes next, from where we look during an inspection to whether a no-tent option might work for your property. When you understand the differences, what you see at home starts to make much more sense, and you can avoid both overreacting and underreacting.
At Kilter Termite and Pest Control, we have spent more than 30 years inspecting and treating homes in Southern California for both drywood and subterranean termites. Our licensed technicians start every termite service with a free inspection and clear explanations, not a sales pitch, so you understand exactly which type is present and what that means for your home, your schedule, and your budget. In this guide, we share the same comparisons and clues we walk through with our own customers, so you are better prepared before we even step on your property.
Drywood vs. Subterranean Termites at a Glance
When you are standing in your living room staring at pellets or poking at a suspicious board, you need quick, practical clues. While a professional inspection is the only way to be sure, there are clear differences between drywood and subterranean termites that you can spot around a typical Southern California home. A simple “at a glance” comparison can help you decide how urgent the situation is and what kind of help you need.
Drywood termites live inside the wood they are eating. You usually will not see soil around their activity because they do not need it. Instead, they push their dry droppings, called frass, out through tiny holes in the wood. Subterranean termites, on the other hand, come up from the soil and build covered mud tubes to protect themselves from air and predators while they travel. When we are called to a house in Orange County or San Diego and see soil-colored tubes running up a stem wall or a slab edge, we are often looking at subterranean termites rather than drywood termites.
Here is a simple way to think about it:
- Drywood termites: Live inside dry wood above ground, often in rooflines, fascia, window and door frames, and exposed trim. They leave small, hard, sand-like pellets and small kick-out holes.
- Subterranean termites: Live in the soil and depend on moisture. They reach your home through the ground, build mud tubes on concrete or masonry, and often attack wood that touches or is close to the soil.
- Treatments differ: Drywood infestations are often handled with localized or no-tent treatments when activity is limited, while subterranean problems are usually treated with soil or perimeter work that targets the colony’s access to your home.
During our inspections, we use this same mental checklist, but with more detail and tools. On stucco homes in Los Angeles County, for example, we often find drywood activity in wood trim or under eaves with no soil contact at all, while subterranean termites tend to show up at slab edges, garage steps, or behind flower beds where irrigation keeps soil damp. Recognizing that pattern is the first step toward choosing the right plan rather than guessing or relying solely on what a neighbor experienced in a very different situation.
How Drywood Termites Behave in Southern California Homes
Drywood termites are perfectly adapted to life inside dry, sound wood. They bring all the moisture they need in their bodies and from the wood itself, which is why they do not have to return to the soil. In Southern California homes, they often enter through tiny gaps in paint or exposed end grain, then slowly hollow out galleries within boards, beams, and trim. Because they are high up and hidden, many homeowners do not realize they are there until they see pellets or discover soft spots while painting or repairing.
Those pellets, called frass, are one of the best clues. Drywood frass looks like small, hard granules, often tan to dark, similar to coarse sand or coffee grounds. You might find small piles on windowsills, along baseboards, below ceiling beams, or on the floor beneath overhead trim. The termites push the frass out through very small kick-out holes to keep their galleries clean. In many Orange County and coastal homes we inspect, clients tell us they sweep or vacuum the same mysterious pile every few weeks, only to realize it keeps coming back because the colony above is still active.
Drywood colonies tend to grow more slowly than large subterranean colonies, and many infestations start in a limited area, such as one section of fascia or a single door frame. That does not mean they are harmless, but it does change how we approach them. During a free inspection, our technicians look for frass patterns, hollow-sounding wood, small surface cracks, and older repair patches to map where drywood termites might be working. We also consider the age and condition of the structure, since older homes in Los Angeles and San Diego often have multiple, scattered colonies across different areas rather than a single massive infestation.
One advantage of understanding drywood behavior is that it opens up treatment options. At Kilter Termite and Pest Control, we offer targeted “No-Tent, No Moving Out” treatments for many drywood infestations. When our inspection shows that activity is limited to certain areas, we can often recommend focused solutions that do not require you to pack food, move out, or deal with a full-structure tent. If we find that drywood termites are widespread throughout the building, we explain that clearly and walk you through all available options, including more extensive treatments when necessary, so you can make an informed choice.
How Subterranean Termites Attack from Below
Subterranean termites live a different life. Their main colonies are in the soil, often just outside or underneath your home. They need moisture to survive, so they build covered mud tubes that connect the ground to the wood they are eating. These tubes protect them from dry air and predators and allow thousands of workers to move back and forth between the colony and the structure. Around Riverside and inland areas where soils and irrigation keep things damp, we see this pattern frequently and often find activity where homeowners rarely look.
In practical terms, that means subterranean termites usually enter your home from below or outside. They might come up through cracks in a slab, along plumbing penetrations, behind stucco where it meets the foundation, or through direct wood-to-soil contact at posts, steps, or siding that sits too low. Homeowners sometimes first notice thin, crusty, soil-colored lines running up a foundation wall, inside a garage, or along piers in a crawlspace. Those mud tubes are a strong sign that subterranean termites are active and using that route to reach the wood.
Because subterranean colonies can be large in the soil and often attack hidden framing, damage can be more extensive before anyone notices. We commonly find subterranean activity in sill plates, subflooring, joists, and lower wall framing. In slab-on-grade homes typical in many Southern California neighborhoods, termites can travel behind wall finishes or insulation where you will not see them without an inspection. Moisture problems, such as poor drainage, leaky irrigation, or water pooling near the foundation, increase the risk that subterranean termites will find and stay in your home.
Our inspectors pay close attention to these conditions. During a free subterranean inspection, we check the foundation perimeter, look inside accessible crawlspaces, scan garage edges and steps, and look for hidden mud tubes where stucco meets concrete. Because we have worked on so many homes in this region, we know the common construction details and problem spots. This experience helps us locate subterranean termites even when there are no obvious tubes on the front of the house, and it informs the type of treatment we recommend.
What You Can Look For Right Now
While a professional inspection gives you the most accurate picture, you can do a simple walkthrough yourself to gather clues before you call. Start indoors. Look along window sills, baseboards, and floors for small piles of hard, sand-like pellets. Check around door frames, built-in cabinets, and ceiling beams for pellets, small holes, or blistered paint that may be covering a gallery. If you find piles that keep returning to the same spot despite cleaning, that is a strong signal that drywood termites might be active in that area.
Also, inside, pay attention to swarmers and wings. In certain seasons and weather conditions, both drywood and subterranean termites release winged reproductives. You might see them around windows, lights, or sliding doors. Piles of small, shed wings on interior sills or counters often mean termites swarmed from a nearby colony. Note where you see them and when. Even if you cannot tell which type they are, these details help us during an inspection and can point toward areas that need a closer look.
Outside, walk around the foundation of your home. Look for mud tubes on concrete, block, or stem walls. Check the inside walls of your garage near the slab, the edges of steps, and any exposed foundation, both inside and outside. If you have a crawlspace, a quick visual inspection of the piers and sill plates, if safely accessible, can reveal tubes or soil-like material. Subterranean termites often leave these signs near moisture sources, such as hose bibs, irrigation lines, or low spots where water collects after rain.
As you look, consider your landscaping and construction. Are there fence posts, deck posts, or stair stringers that go directly into the soil? Is there siding or stucco that appears to run below grade, so you cannot see where it meets the foundation? These conditions are common in Southern California and often coincide with subterranean termite entry. If you are unsure whether what you are seeing is frass, mud tubes, or something else, you can use our convenient send-a-photo tool to share images with our team. We can often tell you whether it looks like drywood or subterranean activity and whether it is time for a full inspection.
Treatment Options for Drywood vs. Subterranean Termites
Once we know which termite species is present, we can design a treatment plan that addresses the actual problem rather than guessing. For drywood termites, many Southern California infestations are localized. If our inspection shows activity confined to specific areas, such as certain fascia boards, window frames, or sections of interior trim, we can often recommend focused treatments to target those colonies. At Kilter Termite and Pest Control, we offer “No-Tent, No Moving Out” options that allow you to stay in your home without the disruption of full-structure fumigation when conditions are right.
In some cases, especially in older or heavily infested homes, drywood termites may be widespread throughout the structure. When that happens, we explain why a broader approach might be recommended, and we walk you through the pros and cons of each method. The important point is that the decision is based on what we actually find, not a blanket rule that every drywood issue must be tented. Our goal is to match the treatment to the extent and location of the infestation while respecting your schedule and budget, and we are always open about what each option involves.
Subterranean termites call for a different strategy. Because their colonies are in the soil and they reach your home from below or outside, treatment typically focuses on creating a protective zone around the structure. This may involve treating soil along the foundation, at critical entry points, and in crawlspaces or under slabs where accessible. The objective is to cut off the termites’ access to the wood they are attacking and to affect the colony population over time, rather than simply treating the visible tubes.
From a homeowner’s perspective, the tradeoffs look different. Subterranean treatments usually do not require you to leave the home, pack food, or tent the structure, but they do require careful work around the foundation and may involve drilling or trenching in certain areas. Property size, layout, construction type, and the extent of activity all influence the scope and cost. Because we provide a two-year warranty on our termite services, with options to extend, we also plan for long-term monitoring and protection, not just a one-time visit.
Throughout this process, our technicians explain why we are recommending a given approach based on your specific drywood or subterranean situation. We are committed to honest, straightforward recommendations, which means we do not push tenting, no-tent treatments, or any particular method unless it matches what your home actually needs. That transparency is one reason so many Southern California homeowners return to us when they need help again or refer neighbors who are dealing with termites for the first time.
Preventing Future Termite Problems Based on Type
Prevention looks a little different depending on whether you are mainly at risk from drywood or subterranean termites, though many homes in Southern California can encounter both. For drywood termites, the focus is on making your wood surfaces less susceptible to invasion. Keeping exterior paint and sealants in good condition, especially at rooflines, fascia boards, and window and door trim, helps close off tiny cracks that swarming pests use as entry points. Sealing gaps around utility penetrations, vents, and eave returns can also make a big difference, particularly in older homes with weathered finishes.
Inside, periodic checks of high-risk areas, such as attics, exposed beams, and older window and door frames, can help you spot pellet piles or small surface changes before a colony has years to expand. If we have treated drywood termites in your home, we will often suggest a simple monitoring routine and, when appropriate, follow-up inspections to confirm that previously active areas remain clear. When we replace termite-damaged wood, we also look for ways to improve design details, so new material is better protected with paint and caulking and less likely to offer easy access in the future.
For subterranean termites, prevention is heavily tied to soil and moisture. Keeping soil and mulch levels a few inches below stucco or siding so you can see the top of the foundation helps prevent hidden entry points. Managing irrigation so sprinklers and drip lines do not constantly soak the foundation or wood elements is equally important. Fixing drainage issues, such as downspouts that discharge at the base of walls or low spots that hold water, can lower the chances that subterranean termites will find and stay in your home.
During and after a subterranean treatment, we often point out conditions we observe that increase risk, such as wood steps in direct contact with soil, planter boxes against exterior walls, or unventilated crawlspaces with high moisture. Addressing these issues, combined with periodic professional inspections or a maintenance plan, greatly improves long-term protection. At Kilter Termite and Pest Control, we can help with related repairs, such as replacing damaged exterior wood, and we offer ongoing pest control plans that include termite monitoring for homeowners who want year-round oversight.
When to Call for a Professional Termite Inspection
There is a point where guessing from photos and articles stops being helpful and a hands-on inspection becomes essential. If you see pellet piles indoors that return after cleaning, any mud tubes on foundation walls, posts, or garage interiors, or swarmers and wings appearing inside the house, it is time to call. The same applies if you hear unexplained hollow spots in wood, notice sagging or blistered areas in walls, or receive a termite note on a real estate inspection report and want a second opinion from a company focused on clear communication.
When you schedule a free termite inspection with Kilter Termite and Pest Control, here is what to expect. A licensed technician arrives within your chosen window, surveys the exterior, foundation, and accessible rooflines, and then moves inside to check attics, garages, and visible framing. We look closely at the signs you have noticed and then expand outward to see whether activity is localized or widespread. Along the way, we are looking for the clues that distinguish drywood from subterranean termites, such as the presence of frass versus mud tubes, entry points, and moisture conditions.
After the inspection, we sit down with you and walk through what we found in plain language. If termites are present, we explain which type or types are present, show you photos where helpful, and discuss treatment options that match your situation. That might mean a localized no-tent treatment for a limited drywood issue, a soil-based plan for subterranean termites, or a combination approach if both are involved. We also talk about any recommended repairs and how our two-year termite service warranty can protect you after treatment. Because we are local, family-owned, and have earned strong reviews and industry recognition, our business relies on giving honest recommendations rather than pushing unnecessary work.
Let Us Give You Clear Answers About Termites in Your Southern California Home
Knowing that there is a difference between drywood and subterranean termites, and understanding how each one behaves, puts you in a much stronger position as a homeowner. You can look at pellet piles, mud tubes, or suspicious damage with a more informed eye and ask better questions about treatment and prevention. Most importantly, you do not have to guess alone or make big decisions based solely on what you read online or hear from neighbors who might have dealt with a very different type of termite.
If you are seeing possible signs of termites anywhere in your Southern California home, we are ready to help you sort out what is really going on. Our team at Kilter Termite and Pest Control offers free termite inspections, same-day appointments, and clear, no-pressure recommendations, including no-tent options for many drywood infestations and proven approaches for subterranean termites. Let us take a careful look, explain exactly what we find, and build a plan that fits your home, not a generic checklist.
Call (866) 827-1727 to schedule your free termite inspection today.