Which of the following is NOT typically expected knowledge for a competent real estate agent regarding a house's construction?

A competent real estate agent is expected to have a broad understanding of various aspects of a house's construction in order to effectively advise clients and facilitate transactions. The location of underground wires, while important for safety and potential renovation projects, is generally not a common area of expertise or expected knowledge for agents. While they may have access to this information through property disclosures or inspection reports, it is not typically a detail that agents need to know on a day-to-day basis when representing buyers or sellers.

In contrast, knowledge of the type of insulation used, the foundation type, and the materials used for the roof are all fundamental elements that significantly impact a home's value, energy efficiency, and structural integrity. Understanding these aspects allows an agent to provide more informed insights to clients about the property's condition, performance, and potential issues.