How Difficult Are Termites to Treat?

Q: Can you get rid of termites for good?

You can eliminate an infestation, but not the risk. Baits can wipe out a subterranean colony and fumigation kills drywood termites throughout a structure, yet new colonies can arrive later from the soil, from swarmers or in infested wood. UF/IFAS notes that reinfestation is possible after fumigation without preventive measures. That is why ongoing monitoring, bait stations and yearly inspections are part of long-term termite control.

Q: Can I treat termites myself?

Usually not effectively. Subterranean colonies sit in the soil, often away from the house, and drywood colonies are hidden inside wood. UF/IFAS says over-the-counter products are unlikely to control Formosan termites, and the EPA warns that improper soil treatments can contaminate homes and wells. You can help by fixing leaks, clearing mulch and inspecting, but leave treatment to a licensed company.

Q: Which termites are hardest to get rid of?

Large subterranean colonies are usually the toughest. Formosan and Asian subterranean termites in South Florida can form colonies of millions, forage far from the nest and settle in trees and wall voids. Drywood termites are easier to kill once found, but harder to find: colonies hide inside wood in hard-to-reach places, and spot treatments can miss them. See why Asian subterranean termites are harder to control.

Q: How do I know the termite treatment worked?

Watch for new evidence over the following months. For drywood termites, UF/IFAS suggests clearing away old pellets and checking for new ones or new swarmers, keeping in mind that vibration can dislodge old pellets. For subterranean termites, the technician checks the bait stations for activity and you should watch for new mud tubes. Swarms the next season are a reason to call the company back.

Q: Do I have to leave my house for termite treatment?

Only for tent fumigation. Fumigation requires everyone, including pets, to stay out until the structure is cleared for re-entry. Baiting systems for subterranean termites and local drywood treatments such as injections normally let you stay at home. Ask the company about re-entry times for any product, as the EPA recommends. Learn what to expect in our article on fumigation myths.

Key takeaways

Termites are treatable, but hard to reach: subterranean colonies live in the soil and drywood colonies live deep inside the wood.
Subterranean and drywood termites need completely different treatments, so identifying the species comes first.
Tenting does not work on subterranean termites, and soil treatments do not work on drywood termites.
The EPA says termiticide application can in most cases only be properly done by a trained professional.
Local drywood treatments can miss hidden colonies; survivors can rebuild the infestation.

In this article

Why Termites Are So Hard to Treat
How Professionals Treat Subterranean Termites
How Professionals Treat Drywood Termites
Why DIY Termite Treatment Usually Fails
What You Can Do to Make Treatment Work
Choosing a Termite Treatment Company
Frequently Asked Questions

Termites are difficult to treat because you almost never reach them directly: subterranean colonies live in the soil, sometimes well away from the house, and drywood colonies live deep inside pieces of wood you cannot see into. They are very treatable, but only with the right method for the species, applied where the colony actually is.

That is why home remedies and store-bought sprays so often disappoint, and why the same company may tent one house and install bait stations around the next. This article explains what makes termites hard to control, which treatments work for which termites, what professionals bring that a homeowner usually cannot, and what you can do yourself to make treatment succeed.

Gloved technician hand using a drill and treatment nozzle near a slab joint during termite treatment.

Why Termites Are So Hard to Treat

The Colony Is Out of Reach

The termites you see are a tiny fraction of the colony. The EPA notes that termites rarely emerge from the soil, mud tubes or wood they tunnel through. A Formosan colony can hold several million termites and forage up to about 100 meters in the field, according to UF/IFAS. Spraying a mud tube or a swarm kills a few individuals; the queen and the rest of the colony carry on.

South Florida Has Many Kinds of Termites

Florida has about 20 established termite species and leads the country in termite diversity, according to UF/IFAS, and entomologist Thomas Chouvenc calls that diversity “a big problem” because the mix of drywood and subterranean species creates confusion about treatment. A subterranean termite treatment does nothing for drywood termites, and the reverse is also true. A good result starts with knowing which termite you have; our guide to drywood vs. subterranean termites explains the differences.

Buildings Hide the Problem

Treating termites requires detailed knowledge of how a building is put together: where the slab has expansion joints and settlement cracks, where plumbing passes through, which walls are hollow, how the roof framing connects. FDACS notes that termites do their damage behind closed walls and that large settlement cracks in a slab may need extra treatment. Many of these spots are hard for a homeowner to see, let alone reach.

Drywood Colonies Hide in Several Places

Drywood termites live inside the wood they eat, often in attics and upper parts of the structure. UF/IFAS notes that visual inspection for the West Indian drywood termite is difficult because colonies hide in hard-to-reach places like crawlspaces and wall voids. Treating the colony you found does nothing for any colony you did not find.

How Professionals Treat Subterranean Termites

Eastern, Formosan and Asian subterranean termites nest in the soil and need moisture. Treatment targets the soil around and under the structure, or the colony itself through baits.

Liquid soil termiticides. The EPA lists soil-applied barrier treatments as the most common approach. Products are applied to the soil along the foundation or injected through drilled holes in the slab. UF/IFAS notes that non-repellent liquids protect the treated structure but are unlikely to eliminate colony activity nearby. Read more in all you need to know about termite ground treatment.
Termite baits. Stations around the house hold cellulose bait with a slow-acting ingredient. Workers share it with the colony, and the colony dies as termites fail to molt; for Formosan termites, UF/IFAS puts colony elimination at about 3 months.
Direct wood treatment. FDACS describes termiticides applied directly to the bottom third of the wood framing during construction.

Tenting is not an option here. UF/IFAS points out that fumigation is ineffective against subterranean termites because colonies outside the tent can move right back in.

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How Professionals Treat Drywood Termites

Drywood termites never need soil, so soil treatments do nothing for them (UF/IFAS). Treatment targets the wood.

Local or spot treatments for small, accessible infestations such as a door frame or a piece of furniture: termiticide injections, dusts or foams applied into the galleries, or replacing the infested wood. Products must be non-repellent, or the termites avoid them.
Whole-structure treatments for widespread or inaccessible infestations: tent fumigation, usually with sulfuryl fluoride, or heat. UF/IFAS notes that fumigation leaves no residue, but occupants must leave and it is a specialized process that requires experts.

The catch with spot treatments is coverage. UF/IFAS warns that if the whole colony is not exposed, survivors can re-establish the infestation. That is why an inspector decides between local and whole-structure treatment based on how far the colonies have spread, not on preference.

	Subterranean termites	Drywood termites
Where the colony lives	Soil, wall voids, hollow trees	Inside dry wood: framing, trim, furniture
What gives them away	Mud tubes, swarms, soil in damaged wood	Pellet piles, kick-out holes, swarms
Main treatments	Baits, liquid soil termiticides	Local injections, tent fumigation, heat
Does tenting work?	No	Yes, for widespread infestations
Do soil treatments work?	Yes	No
Biggest challenge	Huge colonies far from the house	Finding every hidden colony

Toro tip: Before any termite treatment, ask the inspector which species they found, where the activity is and why they recommend that method. A clear answer to those three questions is the best sign that the treatment fits your house.

Why DIY Termite Treatment Usually Fails

Most homeowner attempts fail for the reasons above: the product never reaches the colony. A few more problems make it worse:

Wrong product, wrong termite. A spray or soil drench does nothing for drywood termites, and a spot foam does nothing for a subterranean colony under the yard.
Not enough coverage. Soil treatments depend on continuous coverage around the whole foundation, which takes equipment and access that most homeowners do not have.
Products that do not protect. The EPA warns that products that only claim to kill termites have not demonstrated the ability to protect structures, and that a product without directions to control termites and protect the structure should not be used for that purpose.
Lost time. Each failed attempt gives the colony more months to feed. See how delaying termite treatment can ruin your home.

Safety note: The EPA states that, in most cases, termiticides can only be properly applied by a trained pest management professional, and that improper application can contaminate the home and nearby drinking water wells. Never use fuel, bleach or homemade mixtures against termites, and keep children and pets away from any treated area until the label or the applicator allows re-entry.

What You Can Do to Make Treatment Work

Homeowners play a real part in a successful termite treatment, even if they do not apply it:

Fix moisture. FDACS warns that moisture sources can break down chemical barriers; repair leaks and aim sprinklers away from walls.
Keep the foundation visible. Thin mulch near the house and leave a clear strip so new tubes show up.
Do not disturb bait stations or treated soil, and tell your company before landscaping or adding a patio.
Watch for new evidence. New pellets, tubes or swarmers after treatment are a reason to call back.
Keep up inspections. Our guide to where termite inspectors look shows the areas worth checking.

Choosing a Termite Treatment Company

Because treatment is technical, the company matters. The EPA advises checking that the firm is licensed by your state and asking to see the license; you can also ask for a copy of the product label and when it is safe to re-enter. FDACS adds that Florida termite contracts come with one of three warranty types (retreatment only, retreatment and repair, or spot or no warranty), so read what you are buying.

At Toro, every termite control job starts with a free inspection by a trained technician who identifies the species and checks how far the damage goes. Subterranean termites are treated with the Sentricon baiting system, installed around the property with no drilling into the slab and no trenches. Localized drywood colonies can be treated with TORO-GUARD, a non-tenting injection treatment, and drywood infestations that have spread through the structure are treated with tent fumigation. Technicians are trained at the TORO Institute with on-staff entomologists, and the work is backed by the 110% Satisfaction Guarantee.

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Frequently Asked Questions

Can you get rid of termites for good?

You can eliminate an infestation, but not the risk. Baits can wipe out a subterranean colony and fumigation kills drywood termites throughout a structure, yet new colonies can arrive later from the soil, from swarmers or in infested wood. UF/IFAS notes that reinfestation is possible after fumigation without preventive measures. That is why ongoing monitoring, bait stations and yearly inspections are part of long-term termite control.

Can I treat termites myself?

Usually not effectively. Subterranean colonies sit in the soil, often away from the house, and drywood colonies are hidden inside wood. UF/IFAS says over-the-counter products are unlikely to control Formosan termites, and the EPA warns that improper soil treatments can contaminate homes and wells. You can help by fixing leaks, clearing mulch and inspecting, but leave treatment to a licensed company.

Which termites are hardest to get rid of?

Large subterranean colonies are usually the toughest. Formosan and Asian subterranean termites in South Florida can form colonies of millions, forage far from the nest and settle in trees and wall voids. Drywood termites are easier to kill once found, but harder to find: colonies hide inside wood in hard-to-reach places, and spot treatments can miss them. See why Asian subterranean termites are harder to control.

How do I know the termite treatment worked?

Watch for new evidence over the following months. For drywood termites, UF/IFAS suggests clearing away old pellets and checking for new ones or new swarmers, keeping in mind that vibration can dislodge old pellets. For subterranean termites, the technician checks the bait stations for activity and you should watch for new mud tubes. Swarms the next season are a reason to call the company back.

Do I have to leave my house for termite treatment?

Only for tent fumigation. Fumigation requires everyone, including pets, to stay out until the structure is cleared for re-entry. Baiting systems for subterranean termites and local drywood treatments such as injections normally let you stay at home. Ask the company about re-entry times for any product, as the EPA recommends. Learn what to expect in our article on fumigation myths.

Sources

Termites: How to Identify and Control Them, U.S. Environmental Protection Agency
Drywood and Dampwood Termites (EDIS ENY-211), UF/IFAS Extension
Formosan Subterranean Termite, Coptotermes formosanus (EDIS IN278), UF/IFAS Extension
Termite Season: UF/IFAS Scientist Answers Common Questions, Corrects Misconceptions, UF/IFAS News
West Indian Drywood Termite, Cryptotermes brevis (EDIS IN236), UF/IFAS Extension
Protecting Yourself and Your Property Against Subterranean Termites, Florida Department of Agriculture and Consumer Services

Educational content. This article is for general information about pests in South Florida and is not medical, legal or professional advice. If you have a bite, sting or allergic reaction, contact your doctor; in an emergency, call 911. Pest problems vary from home to home, so a licensed professional should inspect before treatment. When using any pesticide, always read and follow the product label.