Subterranean termite treatment for Long Beach slabs, crawlspaces and foundations

Older soil treatments created a chemical barrier that termites avoided. The trouble was that any gap in the barrier, such as a missed corner or a disturbed patch of soil, let termites through. Modern non-repellent termiticides such as fipronil, chlorantraniliprole and similar active ingredients work differently. Termites do not sense them, so they keep foraging through treated soil.

As workers move through treated soil, they pick up the product and carry it back to the colony, passing it to others through contact and grooming. That transfer means the treatment affects more than the termites that touched the soil directly. Over a few weeks to a few months, activity drops and mud tubes stop being rebuilt.

Results depend on even application. The soil must be treated continuously along the foundation, at the right depth and concentration. That is why trenching, rodding and slab drilling follow a set pattern rather than spot spraying the visible tubes.

Liquid treatment acts quickly once applied and protects the soil around the house for years. It is a strong choice when activity is active and visible, when you are selling the house and need a completion notice, or when the perimeter is accessible.

Bait stations are installed in the soil around the house and contain a bait that termites feed on and share with the colony. They take longer to work because termites have to find the stations, but they use small amounts of product and need no trenching or slab drilling. Baits suit homes with landscaping that would be disturbed by trenching, or owners who want ongoing monitoring. Some homes use both: liquid treatment for immediate activity and bait stations for long-term watching.

• Liquid: faster results, no ongoing service needed
• Liquid: requires trenching and drilling
• Baits: minimal soil disturbance
• Baits: need regular monitoring visits

Subterranean termites depend on moisture. A treatment applied while a leak keeps soil wet next to the foundation is fighting uphill. Fixing the conditions that attract termites is part of the treatment, not an extra.

Common problems are sprinklers spraying onto walls, downspouts emptying at the foundation, leaking hose bibs and plumbing in crawlspaces, planters built against stucco and wood siding buried in soil or mulch. Wood fence posts and gates attached to the house give termites a bridge from soil to framing. We note these on the report so they can be corrected. In crawlspaces, poor ventilation and standing water also need attention. Each fix reduces the chances that termites find a way back in.

Keep a gap of a few inches between soil or mulch and the bottom of stucco or siding. That strip lets you see any new mud tube at a glance, which is the simplest monitoring a homeowner can do between inspections.

Treatment stops the termites, but it does not restore wood they have already eaten. Subterranean damage tends to concentrate low in the structure: sill plates, the bottom of wall studs, rim joists, subfloor near bathrooms and door frames at grade. Some of that wood still has plenty of strength and only needs monitoring. Some of it is hollowed out and needs replacement or reinforcement.

We probe each damaged area during the inspection and note which pieces need attention. Repairs are usually scheduled after treatment so new wood goes into a structure where the colony is no longer active. When new lumber touches concrete or sits close to soil, pressure-treated wood or a borate application on bare framing adds protection. On a sale, the completion notice covers both the treatment and the listed repairs, so lenders and buyers can see the full scope of what was done.

Raised-foundation homes from the 1910s to 1930s in Belmont Heights, Rose Park, California Heights and North Long Beach often have crawlspaces with old plumbing, damp soil and wooden piers or mudsills close to grade. Mud tubes on crawlspace piers and along stem walls are common findings, and treatment includes the soil around piers and plumbing lines as well as the perimeter.

Slab-on-grade ranch homes in Los Altos, Park Estates and Lakewood Village face termites entering through cracks, expansion joints, plumbing penetrations and the gap where the slab meets stucco. Many of these homes have sprinkler-fed lawns and planters along walls, which keep soil damp all year. Homes near the Los Angeles River in Los Cerritos and Wrigley, and those close to Colorado Lagoon in Alamitos Heights, often sit on soil that holds moisture longer, which supports subterranean colonies through the dry summer.