Before treating a basement from the outside, what should be checked?

Checking the foundation walls for cracks is essential before treating a basement from the outside because cracks can indicate underlying structural issues that may contribute to pest infestations. When there are cracks in the foundation walls, it can allow for the entry of wood-destroying pests like termites, which seek out moist and damaged wood. Identifying and assessing any cracks helps determine the most effective treatment plan for both pests and the integrity of the structure. Addressing these cracks before treatment can ensure that treatment efforts are not undermined by ongoing structural problems that could continue to allow pests access.

While considering the condition of the yard, the presence of moisture in the basement, and the overall structural integrity of the house are important factors in pest control and prevention, the immediate concern in this context focuses on ensuring that the foundation is sound. Cracks in the foundation walls can directly lead to pest access, making this a primary area of concern prior to any external treatment.