According to Kentucky Department of Agriculture, how often should concrete slabs adjoining foundation walls be drilled?

In Kentucky, the guidance provided by the Department of Agriculture stipulates that drilling into concrete slabs adjoining foundation walls should occur every 18 inches. This practice is important for creating a treatment zone for pest control, particularly for subterranean termites and other pests that may invade from the soil beneath the slab. The 18-inch spacing is designed to ensure adequate coverage and effective penetration of pest control products into the areas where pests are likely to enter the structure.

Choosing a spacing that is too wide, such as 24 inches or 30 inches, could lead to insufficient coverage and increase the risk of pest infestation in untreated areas. On the other hand, drilling every 12 inches might be more invasive and unnecessary, potentially causing more damage to the slab than is required for effective pest management. Therefore, the recommendation of every 18 inches strikes a balance between thoroughness and practicality in pest control efforts.