Based on the provided guide, a professional foundation inspection involves a thorough investigative process to identify root causes of structural distress. While the exact duration in minutes or hours is not explicitly stated, the process consists of several detailed steps:

• Site Visit and Visual Assessment: A licensed professional performs a comprehensive walkthrough of the interior and exterior. This includes examining the foundation layout, identifying cracks, and checking for bowing walls or uneven settlement.
• Data Collection and Measurement: The inspector uses specialized tools to take precision elevation measurements, map crack widths and orientation, and document wall deviation from plumb. They also analyze site drainage and soil conditions.
• Forensic Record Creation: The professional documents findings through numerous photographs and measurements to create a baseline for the forensic record.

To ensure the inspection is as efficient as possible, homeowners should prepare by clearing access to foundation walls in basements or crawl spaces, securing pets, and gathering previous architectural plans or engineering reports. Following the site visit, the data is compiled into a detailed forensic inspection report which serves as the professional diagnosis.