ASHI Standards of Practice (summary)

The American Society of Home Inspectors®, Inc. (ASHI®) is a not‐for‐profit professional society established in 1976. Membership in ASHI is voluntary and its members are private home inspectors. ASHI's objectives include promotion of excellence within the profession and continual improvement of its members' inspection services to the public. Home inspections performed using this Standard are intended to provide the client with information about the condition of inspected systems and components at the time of the home inspection. ASHI Certified inspectors inspect readily accessible, visually observable, installed systems and components listed below and provide you with a written report detailing the systems and components inspected that, in the professional judgment of the inspector, are not functioning properly, significantly deficient, unsafe, or are near the end of their service lives. The inspector will also make recommendations to correct, or monitor for future correction, the deficiencies and provide reasoning or explanation as to the nature of the deficiencies. Your inspection covers no less than:


  • Roofing materials
  • Roof drainage systems
  • Flashing
  • Skylights, chimneys, and roof penetrations
  • Describe the roofing materials & methods used to inspect the roofing


  • Foundation
  • Framing
  • Floor structure
  • Wall structure
  • Ceiling structure
  • Roof structure
  • As well as describe the methods used to inspect under‐floor crawlspaces and attics


  • Service drop
  • Service entrance conductors, cables, and raceways
  • Service equipment and main disconnects
  • Service grounding
  • Interior components of service panels and subpanels
  • Conductors
  • Overcurrent protection devices
  • A representative number of installed lighting fixtures, switches, and receptacles
  • Ground fault circuit interrupters and arc fault circuit interrupters
  • Describe amperage rating of the service, location of main disconnect(s) and subpanels, presence or absence of smoke alarms and carbon monoxide alarm, and the predominant branch circuit wiring


  • Interior water supply and distribution systems including fixtures and faucets
  • Interior drain, waste, and vent systems including fixtures
  • Water heating equipment and hot water supply systems
  • Vent systems, flues, and chimneys
  • Fuel storage and fuel distribution systems
  • Sewage ejectors, sump pumps, and related piping
  • Describe the interior water supply, drain, waste, and vent piping materials as well as the water heating equipment including energy source(s) and location of main water and fuel shut‐off valves


  • Wall coverings, flashing, and trim
  • Exterior doors
  • Attached and adjacent decks, balconies, stoops, steps, porches, and their associated railings
  • Eaves, soffits, and fascias where accessible from the ground level
  • Vegetation, grading, surface drainage, and retaining walls
  • Adjacent and entryway walkways, patios, and driveways


  • Insulation and vapor retarders in unfinished spaces
  • Ventilation of attics and foundation areas
  • Kitchen, bathroom, laundry, and similar exhaust
  • Clothes dryer exhaust systems
  • Describe the insulation and vapor retarders in unfinished spaces and absence of insulation in unfinished spaces at conditioned surfaces


  • Walls, ceilings, and floors
  • Steps, stairways, and railings
  • Countertops and installed cabinets
  • Doors and windows
  • Garage vehicle doors and garage vehicle door operators


  • Central and permanently installed cooling equipment
  • Installed heating equipment
  • Distribution systems
  • Vent systems, flues, and chimneys
  • Access panels
  • Distribution systems
  • Describe the energy source(s), cooling systems, and heating systems


  • Ovens
  • Ranges
  • Surface cooking appliances
  • Microwave ovens
  • Dishwashing machines
  • Food waste disposal


  • Fuel‐burning fireplaces, stoves, and fireplace inserts
  • Fuel‐burning accessories installed in fireplaces
  • Chimneys and vent systems