Before treating a basement on the exterior, you should?

Checking the foundation walls for cracks is an essential step before treating a basement on the exterior because these cracks can be entry points for termites and other pests. If there are any existing cracks, treating the area may not be effective, as termites could easily re-enter through these openings after treatment. Inspecting the foundation helps to identify vulnerabilities that need to be addressed to ensure the integrity of the pest control efforts.

By addressing cracks, you can enhance the effectiveness of the treatment by preventing future infestations. This proactive approach is crucial for long-term pest control and maintaining a safe environment in the basement area. Other options might not directly relate to the immediate need for effective termite treatment and can be actions taken after assessing the condition of the foundation walls.