National Home Inspector Practice Exam 2026 - Free Home Inspector Practice Questions and Study Guide

Identifying the presence of pests in a home through visual cues such as droppings, nesting materials, or signs of damage is a reliable method that inspectors commonly use. These indicators provide direct evidence of pest activity and can point to specific types of infestations, like rodents or insects. For instance, specific droppings can indicate the type of rodent present, and nests can reveal where pests are nesting within the structure. Additionally, signs of damage, such as chewed wires, wood, or insulation, can signify a more serious infestation that may require immediate attention.

While involving homeowners in discussions about past infestations can provide useful background information, it doesn’t serve as a definitive identification method. Chemical analysis of the air isn't typically a practical approach for spotting pests, as many infestations do not release identifiable chemicals into the atmosphere. Similarly, thermal imaging technology can be a sophisticated tool for detecting certain types of pests, particularly rodents, but it is less commonly used in standard home inspections compared to visual identification methods, which provide tangible evidence. Thus, the approach of looking for physical signs remains the most straightforward and effective technique for home inspectors.