Home Termite Treatment Methods | Soil, Baits, And Fumigation

Liquid soil-applied termiticides, wood treatments, and bait systems are the three primary ways to treat a home for termites.

When a termite infestation hits, the wrong treatment can mean thousands in damage and a second call to an exterminator. The right home termite treatment methods depend on one critical factor: the species. Subterranean termites live in the soil and build mud tubes to reach wood. Drywood termites burrow directly into the lumber itself. Each type demands a different approach, and guessing wrong wastes both time and money.

Termite Treatment Options: Soil, Baits, And Wood Applications

The US Environmental Protection Agency recognizes two main categories of structural termite treatment: liquid soil-applied termiticides (conventional barrier treatments) and termite baits. A third category, wood treatment, targets infested timber directly. Gas fumigation covers drywood termites that live deep inside the structure. The table below shows how the major methods compare at a glance.

How Does A Liquid Soil Barrier Actually Work?

Liquid soil-applied termiticides create a continuous chemical zone in the ground that subterranean termites cannot cross. Two primary active ingredients are used: Fipronil and Imidacloprid. Products like Taurus SC contain Fipronil as a non-repellent termiticide — termites cannot detect it, so they travel through the treated area and pick up a lethal dose.

Application requires digging a trench around the entire exterior perimeter. The standard dimensions are 4 to 6 inches wide and 6 inches deep. For a Taurus SC mix, the dilution rate is 0.06%: combine 7 fluid ounces of concentrate with enough water to fill a 4-gallon sprayer. About 8 gallons of finished solution treats 20–25 linear feet of foundation. Pour the mixed solution into the trench, let it soak in, then spray the backfill soil with the same mix before covering it immediately to prevent exposure. Do not disturb the treated soil afterward — breaking the barrier creates gaps termites can exploit.

How Termite Bait Systems Eliminate Colonies

Bait systems use cylindrical plastic stations installed below ground around the property. Each station contains cellulose-based food combined with a slow-acting insect growth regulator. Foraging termites consume the bait, carry it back to the nest, and share it with the colony. The colony declines gradually, often over weeks or months. Indoor bait stations may be placed directly over active mud tubes. This approach causes minimal disruption to the property but works slower than a liquid barrier and requires ongoing monitoring to stay effective.

Wood Treatment and Localized Applications

Direct wood treatment applies chemicals to infested timber to make it an inhospitable environment for termites. Boric acid is a common, lower-toxicity option for localized areas inside living spaces. For spots where liquids cannot reach — inside wall voids or between floors — foam agents are injected to fill the cavity. Dust agents work where foam is impractical, such as behind tight framing. These methods are best for spot treatments, not whole-house infestations. A professional can assess whether localized wood treatment will suffice or if a perimeter-wide approach is needed.

How Much Does Professional Termite Treatment Cost?

Costs vary by method and the size of the infestation. Gas fumigation runs $1,200 to $2,500 for a single-family home and is the standard for drywood termites. Liquid barrier treatments typically cost between $3 and $10 per linear foot depending on the chemical used and local labor rates. Bait system installation and initial monitoring often land in the $800 to $1,500 range. These are professional service prices; DIY products cost less upfront but require precision in application and may not cover the full extent of an established colony.

Prevention That Stops Termites From Returning

Treatment alone is not enough if the conditions that attracted termites remain. The EPA’s termite prevention guidelines emphasize several steps that every homeowner should follow:

• Keep soil around the foundation dry through proper grading, drainage, gutters, and downspouts.
• Fill cracks in cement foundations and utility openings with cement, grout, or caulk.
• Repair plumbing leaks immediately — termites need moisture to survive.
• Keep vents clear of plants, mulch, and debris.
• Do not plant trees or shrubs against the structure or allow them to grow against exposed wood.
• Never pile firewood, lumber, or wood debris next to the house.
• For new construction, install steel mesh or specific sand sizes as physical barriers in the foundation.

Choosing The Right Treatment For Your Home

Start by confirming whether you have subterranean or drywood termites. A professional inspection is the surest way to know. For subterranean termites found near the foundation, a liquid soil barrier or bait system is the standard approach. For drywood termites in exposed wood, localized wood treatment works for small areas; full fumigation covers the whole structure. For readers tackling the problem themselves, we have tested and compiled top-rated at-home termite treatment products that match these methods. No single solution fits every home, but matching the method to the species and extent of the infestation is the only way to stop the damage and keep it from returning.