Will from Kennebunkport, Me writes
The foundation was coated with waterproof membrane.
It is not recommended to use Termidor SC with rock, granite, or gravel. Termidor SC is made to bind to soil molecules which allows it to last for 10 years, whereas Termidor applied to porous surfaces such as rock, granite, gravel, or other material will only last and remain effective for a few months. You should dig a trench in the soil against the foundation and/or drill through concrete to apply. Please take a few moments to review our article on How to Treat for Termites for a successful application. Please let us know if you need anything else.
Answer last updated on: 10/05/2018
