Wood Destroying Organism (WDO) Home Inspection Practice Exam

The correct answer is 12 inches, which aligns with common industry standards for termite prevention in poured slabs. This distance is recommended to ensure effective treatment and to minimize potential access points for termites. By drilling and treating at 12-inch intervals, termite control professionals can create a barrier that more effectively protects against subterranean termites, which are known to travel through the soil and seek entry points into structures.

Using this spacing allows for adequate coverage of the area surrounding the poured slab while ensuring that the treatment solution penetrates the soil effectively, providing added protection against future infestations. This practice is based on guidelines established by pest control authorities to ensure the longevity and effectiveness of termite treatments in structural foundations.