Killing a few visible workers means nothing, because the colony may hold hundreds of thousands of termites underground. Real elimination depends on cutting the link between the colony and the building, or on reaching the infested wood itself if it is the drywood type.
The plan differs by type, as we explained in the termite guide, and these are the recommended steps.
The basis: Eliminating termites requires a chemical barrier in the soil or a spot treatment depending on the type, not a surface spray.
The order: Identify the type and extent first, then fix the moisture source and the entry point, then choose the suitable treatment.
The barrier: It is built around the foundations and along termite paths to cut their contact with the soil they live in.
The common mistake: Leaving moisture and wood in contact with the soil after treatment brings the infestation back, however strong the insecticide.
Follow-up: Inspect the treated areas every few months, because the colony may be larger than what you saw.
Step 1: Identify the Type and Extent
A careful inspection matters more than the product.
- Mud tubes and a link to the soil: subterranean.
- Pellets and kick-out holes without tubes: drywood.
- Extent of the infestation: Tap the wood and trace the tubes to their source.
- Moisture sources: Record every nearby leak.
Step 2: Fix the Moisture and the Entry Point
Any treatment fails if the moisture stays. Fix leaks, improve drainage away from the foundation, and move wood away from the ground.
Step 3: Treat According to the Type
For subterranean termites:
- The chemical barrier: A narrow trench is dug around the foundations and the soil is treated with a soil insecticide, then backfilled gradually while the solution is added.
- Injection through the floor: Holes are drilled in the concrete at its joints and the soil beneath is injected.
- Wood treatment: Inject or spray the infested wood and the wood around it.
- Monitoring: After treatment, inspect the tubes and redo the barrier wherever it is broken.
For drywood termites: inject the holes with insecticide or foam, treat exposed wood, and use fumigation for widespread infestations.
Choosing the Active Ingredient
Each active ingredient has its own characteristics:
- Fipronil (Agenda): Slow-acting, and transferred among workers inside the colony.
- Imidacloprid (Premise): Non-repellent, so termites cross the barrier without avoiding it.
- Bifenthrin (Biflex): Repellent and fast-acting, suitable as a front barrier at entrances.
What Do We Avoid?
- Surface spraying only: It does not reach the colony.
- Treating one side of the building: The colony simply moves to another side.
- Sealing the tubes without treating the soil: They will build others.
- Delaying follow-up: Inspect after one month, three months and one year.
After a successful treatment, move on to preventing termites.
Bait Treatment When a Barrier Is Difficult
In buildings where digging a full trench is hard, a bait system placed in stations around the building is used.
- The idea: Termites feed on a slow-acting bait and carry it to the colony.
- The advantage: It targets the colony itself and needs small quantities.
- The drawback: It needs monthly monitoring and takes longer to show results.
Signs the Treatment Worked
- No new tubes appear after the old ones are broken.
- New pellets stop falling.
- No winged termites appear in the next rainy season.
- The sound inside the infested wood goes quiet.
Mistakes That Delay Recovery
- Relying only on a spray insecticide on the visible wood.
- Ignoring the leak that attracted the termites in the first place.
- Repairing the wood before making sure the colony is gone.
What Happens in Professional Treatment?
A chemical barrier treatment usually begins by digging a shallow trench around the foundation, injecting the soil near the walls, or drilling concrete floors at suitable points, then pumping the designated solution according to the product instructions. The goal is to form a barrier in the soil that keeps termites from reaching the building or affects those that cross it. For localized infestations inside wood, the openings are injected and the surfaces are treated.
Post-Treatment Follow-Up
- Inspect the infested areas after two weeks and again after a month to confirm that activity has stopped.
- Do not remove the mud tubes before the first inspection, then remove them to see whether they are rebuilt.
- Keep the area dry and fix the leak that attracted the termites.
- Record the treatment date and keep the inspector's report for reference.
When Should Treatment Be Repeated?
How long the barrier stays effective varies with the product, the soil and the rain, so manufacturers recommend periodic review and an annual inspection of the building. If termites return before then, the cause is usually a gap in the barrier, untreated moisture or a second colony, so ask for an additional inspection instead of random treatment.
Products from the Orkida Store
We choose the treatment according to the type of termite and where the infestation is, and we recommend reading the dose and safety interval on the label before starting. For large infestations, it is better to use a specialist to apply the full barrier.
- Professional Termite Control Package for Homes: A professional termite package combining the specialized insecticide and application equipment, and it is the most suitable starting point for most homes.
- Agenda 25 EC Public Health Insecticide for Termite Control, 1 L: Agenda 25 (fipronil) is a concentrate for treating the soil around foundations, and it is one of the essentials of the chemical barrier that termites pass through, carrying the material into the colony.
- Agenda 25 EC Public Health Insecticide for Termite Control, 100 ml: A small pack of Agenda for spot treatment in a small building or the affected part.
- Premise 200 SC Insecticide for Termite Control, 1 L: Premise (imidacloprid) is non-repellent, so termites do not avoid it. They pass through it and carry its effect to the colony, making it a strong option around foundations.
- Biflex TC Insecticide for Termite Control, 1 L: Biflex (bifenthrin) is a repellent, fast-acting soil barrier at foundations and entrances.
Frequently Asked Questions
How long does it take to eliminate the colony?
Activity may begin to fade within weeks, but confirming that it is over needs several months of follow-up.
Can I treat it myself?
Small localized infestations, yes. A full barrier around the foundations needs experience and equipment.
Is the treatment safe for children and animals?
It is applied in the soil and foundations away from living spaces, and it requires following the label instructions and the safety interval.
Why did the termites come back after treatment?
Usually because of a gap in the barrier, moisture that was not fixed, or a new colony arriving.
Frequently Asked Questions About Getting Rid of Termites
What does a chemical barrier mean?
It is treating the soil around the foundations and at entry points with a suitable insecticide to form a layer that keeps subterranean termites from reaching the building or kills them as they cross.
Can I treat termites myself?
Small visible infestations can be treated with dedicated products, but widespread infestations or those inside walls and foundations need careful inspection and application by a specialist.
How long does it take to get rid of termites?
It may take weeks for the colony to be affected, and follow-up for several months after treatment is advisable to make sure no new activity appears.
Is bait better than a barrier?
Each has its use. The barrier blocks entry and kills what crosses it, while the bait targets the colony itself, and experts may combine them depending on the termite type and the infestation site.