Standard of Practice - American Society of Home Inspectors & State of Oregon
From the ASHI website-
“The ASHI Standard of Practice was an essential tool in defining home inspection as a recognized profession and gain traction within the real estate market. Refined over the years, the Standard remains an influential document across the industry, and ASHI Members continue to adhere to the Standard today.
The document is divided into specific home systems and details how home inspectors should inspect each component. The ASHI Standard of Practice helps guide the inspector during the home inspection, and ensure their client will receive a thorough and effective inspection. ASHI encourages everyone involved with the home buying process to review the Standard of Practice to understand the home inspector's role in the process.”
The systems of a house that are inspected following the ASHI Standard of Practice are the following:
Structural System, Exterior, Roof System, Plumbing System, Electrical System, Heating System, Air Conditioning System, Interior, Insulation and Ventiltion, and Fireplace and SFBA. The inspection is a limited visual inspection. Most installed fixtures, hardware, appliances and utilities will be operated and inspected if feasible.
It may include additional information or more in depth beyond the standard but that is either an additional service or considered a courtesy.