Termite Control
Updated November 6, 2026
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Safety
Do not disturb mud tubes, damaged wood, or suspected termite galleries before an inspection, since disturbing activity can push colonies deeper into the structure. Keep children and pets away from areas where termiticides, baits, or foams have been applied until the product label says it is safe to re-enter. Never mix or improvise chemical treatments from unlabeled containers; only use products registered for termite use and applied according to the label. Avoid digging, drilling, or trenching near treated soil zones after a barrier treatment, because this can break the chemical treatment perimeter. If wood inside the structure sounds hollow, sags, or crumbles, do not walk on or load that area until it has been evaluated for structural damage. Store firewood, lumber, and cardboard away from the foundation to reduce conditions that attract termite colonies near the home.
Before the visit
Move stored items, boxes, and furniture at least two to three feet away from walls in garages, basements, and crawl spaces so baseboards and sill plates can be examined. Clear debris, mulch piles, and dense vegetation away from the foundation line where mud tubes or entry points are suspected. Note where activity has been seen: mud tubes, discarded wings, frass (droppings that look like sawdust), or hollow-sounding wood, and write down when each sign first appeared. Make sure the crawl space or basement access point is open and free of obstruction if a full inspection of the substructure is needed. Fix visible plumbing leaks and redirect downspouts away from the foundation before treatment, since moisture is a major attractant. Have a copy of any prior termite treatment records or wood-destroying organism reports available for the technician. Plan for access to exterior walls, water heaters, and attached decks or porches, which are common inspection points for a termite control system or treatment plan.
Repair vs replace
Cosmetic wood damage is limited to trim, window sills, or non-structural framing after the colony has been treated and confirmed inactive. Small sections of damaged lumber, such as a section of sill plate or deck board, can be sistered or spliced with treated lumber once activity is eliminated. Mud tubes on exterior foundations can be scraped and sealed after treatment confirms the colony is no longer active. Moisture problems like a leaking sill, rotten door frame, or damaged fascia can be repaired once the source of the moisture and any termite activity are resolved. A monitored bait station system needs routine refills and component repairs during scheduled service visits.
When to replace
Load-bearing framing, joists, or sill plates show extensive hollowing, sagging, or crushing that compromises structural integrity. Damage has spread across multiple rooms or levels, making spot repairs insufficient for the affected framing. Subflooring or floor joists in a mobile home have softened or delaminated from prolonged termite feeding and moisture exposure. Previous treatments have failed repeatedly, and the extent of hidden damage warrants full removal and replacement of infested structural members. A real estate inspection or wood-destroying organism report identifies structural damage requiring replacement before financing or sale can proceed. Wood members damaged by termites are also decayed by fungus or rot, and repair alone would not restore adequate strength.
Common issues
| Symptom | Likely causes | Safe check | Stop when |
|---|---|---|---|
| Mud tubes on foundation walls, piers, or crawl space supports | Subterranean termites building protected travel tunnels between soil and wood; shelter tubes preserve moisture while workers forage. | Look with a flashlight along the foundation, inside the crawl space, and behind siding. Break a small section of one tube with a stick and check over the following days to see whether it is rebuilt, which indicates active infestation. | Tubes are found indoors on interior walls, or wood near the tubes sounds hollow or crumbles when probed. |
| Discarded wings near windowsills, doors, or light fixtures | A termite swarm; winged reproductives leave the colony to mate and then shed their wings, often in spring or after rain. | Collect a few wings or insects in a sealed bag for comparison. Termite swarmers have straight bodies, uniform wings of equal length, and straight antennae, unlike ants with pinched waists and unequal wings. | Swarms appear repeatedly indoors, which signals a mature colony inside or directly beneath the structure. |
| Hollow-sounding or papery wood when tapped on walls, floors, or trim | Termites consuming wood from the inside out, leaving a thin veneer of surface wood intact while galleries form beneath. | Gently tap baseboards, window frames, and door frames with a screwdriver handle and compare sounds between areas. Probe suspect wood lightly with a flathead screwdriver to see whether it gives easily. | A screwdriver punches easily into the wood, or floors feel soft, spongy, or sag underfoot. |
| Frass that resembles sawdust or coffee grounds accumulating on floors or window ledges | Drywood termites kicking fecal pellets out of kick holes in infested wood; common in attic framing, furniture, and door or window frames. | Sweep up a small sample and examine it; drywood termite pellets are hard, six-sided, and vary in color, unlike soft sawdust from carpenter ant activity. | Pellets keep reappearing after cleaning, or small pinholes are visible in exposed wood surfaces. |
| Buckling paint, blistered surfaces, or maze-like patterns in wood and drywall | Subterranean termites tunneling just under the surface of wood or through drywall, combined with moisture they carry into the structure. | Press gently on blistered paint with a fingernail; termite damage often reveals shallow, lined galleries underneath. Do not tear open the surface, since this can disrupt a planned treatment. | Large areas of wall or ceiling show blistering, or the pattern extends across multiple rooms. |
| Stuck windows or doors that suddenly become hard to open | Termite damage and associated moisture causing wood frames to warp and swell as galleries weaken the framing. | Check whether weather or humidity changes explain the sticking, then inspect the frame and surrounding trim for mud tubes, frass, or hollow sounds. | Frames visibly shift or crack, or multiple doors and windows in different areas of the home develop the problem at once. |
| Termite activity found in yard wood, stumps, fences, or landscape timbers | Colonies established in soil feeding on wood in contact with the ground, which can lead to foraging toward the structure. | Inspect fence posts, stacked firewood, tree stumps, and deck supports for mud tubes and hollow spots, and note anything within a few feet of the foundation. | Tubes are found on the foundation itself, or the wood in contact with the structure shows the same damage pattern. |
| Drooping or sagging floors and ceilings in mobile or manufactured homes | Termite feeding on floor joists, support piers, and belly board areas, often combined with moisture damage underneath the unit. | Inspect the skirting and underside where accessible, look for mud tubes on piers and tie-downs, and listen for hollow sounds when tapping exposed framing from underneath. | Floors visibly dip, bounce, or separate from walls, indicating structural members need professional evaluation before further use. |