There are two types of treatment you can take Drywood termite infestation: Whole Structure and Localized treatment.
Whole Structure treatments are best for houses with larger infestations.
It implements the simultaneous treatment of all infestation in a structure.
Localized or spot treatment is applied to more targeted areas and works best for smaller infestations.
Localized Treatment
Localized or spot treatment is applied to targeted areas.
The idea is to identify where the colony is located correctly.
Once located, the treatment is applied directly onto the termites.
For this treatment to be effective, you’ll need to detect precisely where the termites are.
The four types of localized treatments that are proven to be effective are:
Wood Replacement
As the name suggests, wood replacement involves replacing the infested wood.
Wood replacement is ideal if the infestation is only on a few pieces of wood.
After replacing the wood, I recommend you treat the new wood to prevent the termites from coming back.
You can do this by applying a layer of termiticide or bora-care to all sides of the area of the new wood.
Localized Dust / Foam Treatment
Localized Dust or Foam Treatment involves injecting pesticides into the infested wood.
These pesticides can come in the form of liquid, dust, or foam formulations.
Using dust is more effective than foam unless there’s moisture in the wood. Foam is also a better option for larger wall voids.
To apply either dust or foam treatment, drill into the wood and inject the termite galleries with pesticides.
Liquid Nitrogen – Cold Treatment
Cold treatment involves injecting liquid nitrogen into infested areas.
The downside of this method is you’ll likely need professional help, which can be costly.
That said, this approach is free of toxic chemicals.
Heat – Localized Thermal Treatment
Localized heat treatment involves heating infested wood above 120°F, which is fatal to termites.
Heat treatment is an excellent option if you’re looking to treat your home without using chemicals.
Similar to cold treatment, heat treatments require hiring professionals, which can be expensive.
Whole Structure
Whole Structure treatment requires that you hire a professional pest control agency.
This method is best if you suspect you have a significant infestation.
The two types of whole structure treatment are: fumigation and heat.
Fumigation
Fumigation is the process of releasing a fumigant in your home to kill termites.
To do this, professionals must first place a tent over your home.
Fumigation is an excellent solution for large termite infestation.
Studies show that it can eliminate 97% of termites after application.
Heat
Heat treatment uses propane heaters to raise temperature to levels that are deadly to termites.
It’s one of the most effective ways to eradicate termite infestation.
The California Department of Consumer Affairs has even gone on to say that heat is the only sufficient, full-structure treatment for eliminating termite.
And in this study, the heat method was also proven to kill 99% of termites consistently.
Resource: The Best Ways To Get Rid of Drywood Termites