Before treating with termiticides, what should be checked on foundation walls?

Before applying termiticides, it is crucial to check for seepage to the interior of the structure. This is because moisture intrusion provides an ideal environment for termites and other pests to thrive. If there are signs of water seeping into the interior, it indicates that there might be underlying issues with the foundation or waterproofing.

Addressing these issues before treatment is essential, as applying termiticides in areas with moisture problems can lead to reduced effectiveness of the pesticide and can also promote further infestation by attracting termites that thrive in humid environments. Ensuring that the foundation is not compromised by moisture helps to create a more hostile environment for termites, enhancing the overall efficacy of the termite control measures taken.

Other options like checking for cracks and gaps, ventilation, and drainage systems are also important but do not directly address the immediate concerns related to moisture intrusion, which plays a significant role in termite activity.