Major Components & Systems Included in a Professional Home Inspection
The American Society of Home Inspectors - ASHI is the national testing, certification, and ethical standard professional association for home inspectors. The ASHI Standards of Practice define the minimum acceptable scope of a professional home inspection.
The intent of the inspection is that all substantive systems and components that make up the building shall be examined by the home inspector, and that significant defects and dangerous conditions shall be reported to the client orally and in writing. Some items which are numerous but of minor individual cost such as electrical outlets may be sampled using a strategy based on observation and experience.
Other numerous items, such as plumbing fixtures, must all be examined for proper operation and evidence of damage to the building. The ASHI Standard of Practice protects consumers from engaging an inspector who is unprofessional - someone who might be great at roofing but who makes no inspection of plumbing components, for example.
HOME INSPECTION STANDARDS (ASHI) and similar standards of home inspection practice published by other home inspector associations or certifying agencies typically list these major systems:
Structural System such as foundations, wall and roof framing
Exterior building surfaces and components other than temporary or portable items
Air Conditioning System
Interior building surfaces and components other than temporary or portable items
Insulation and Ventilation
Fireplaces and Solid Fuel Burning Appliances as well as chimneys and vents for these devices.
The intention is that all of the substantive physical components and systems that make up the structure, and certain other
conditions (such as site drainage) which affect the structure, shall be examined.
Watch out: The list above is intended to give the broad scope of a professional home inspection and does not include detailed components or topics. But we do provide that detail. For extensive inspection, diagnostic, and repair advice on virtually all building components and systems, readers should note the list of building topics across the top of each page at InspectAPedia.com and also be sure to review the much more detailed building inspection topic & defect lists described at
Home buyers and home inspectors who need to know the detailed standards to which a home inspection should be conducted should examine the
ASHI Standard of Practice as well as their local or State versions of
similar home inspection laws and guidelines if such are provided in their state.
Normally excluded from a pre purchase home inspection are environmental concerns such as mold, radon, lead,
and also excluded are calculations or estimations of system capacities or adequacies, such as cooling or heating capacity.
However home inspectors are not prohibited from offering additional inspection and testing services, including but not limited to such items as mold testing, radon testing, water and septic testing, termite or wood destroying insect infestation inspections, energy audits, heating and air conditioning system inspections, other environmental tests, provided the home inspector is qualified and meets any state or local licensing requirements for those activities.
Home inspectors are (or should be) prohibited from offering to perform repair work on properties that they inspect as well as a general prohibition against any conflicts of interest among their client and other parties involved in owning, selling, or providing services to the property they inspect.
Appliances such as dishwashers, ranges, ovens, and clothes washers as well as portable or window air conditioners or air cleaners are not required to be inspected by most inspection standards, but these may be included in the practice of some home inspectors.
Home Inspection Articles for Consumers & Home Inspectors
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John Cranor is an ASHI member and a home inspector (The House Whisperer) is located in Glen Allen, VA 23060. He is also a contributor to InspectApedia.com in several technical areas such as plumbing and appliances (dryer vents). Contact Mr. Cranor at 804-747-7747 or by Email: firstname.lastname@example.org
Roger Hankey is principal of Hankey and Brown home inspectors, Eden Prairie, MN. Mr. Hankey is a past chairman of the ASHI Standards Committee. Mr. Hankey has served in other ASHI professional and leadership roles. Contact Roger Hankey at: 952 829-0044 - email@example.com. Mr. Hankey is a frequent contributor to InspectAPedia.com.
Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair
Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: firstname.lastname@example.org. The firm provides professional home inspection services & home inspection education & publications. Alan Carson is a past president of ASHI, the American Society of Home Inspectors. Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home. Carson Dunlop Associates' provides extensive home inspection education and report writing material.
The Illustrated Home illustrates construction details and building components, a reference for owners & inspectors. Special Offer: For a 5% discount on any number of copies of the Illustrated Home purchased as a single order Enter INSPECTAILL in the order payment page "Promo/Redemption" space.
TECHNICAL REFERENCE GUIDE to manufacturer's model and serial number information for heating and cooling equipment, useful for determining the age of heating boilers, furnaces, water heaters is provided by Carson Dunlop, Associates, Toronto - Carson Dunlop Weldon & Associates Special Offer: Carson Dunlop Associates offers InspectAPedia readers in the U.S.A. a 5% discount on any number of copies of the Technical Reference Guide purchased as a single order. Just enter INSPECTATRG in the order payment page "Promo/Redemption" space.
The Home Reference Book - the Encyclopedia of Homes, Carson Dunlop & Associates, Toronto, Ontario, 25th Ed., 2012, is a bound volume of more than 450 illustrated pages that assist home inspectors and home owners in the inspection and detection of problems on buildings. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Field inspection worksheets are included at the back of the volume.
Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order. Enter INSPECTAHRB in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.
Special Offer: Carson Dunlop Associates offers InspectAPedia readers in the U.S.A. a 5% discount on these courses: Enter INSPECTAHITP in the order payment page "Promo/Redemption" space. InspectAPedia.com editor Daniel Friedman is a contributing author.
The Horizon Software System manages business operations,scheduling, & inspection report writing using Carson Dunlop's knowledge base & color images. The Horizon system runs on always-available cloud-based software for office computers, laptops, tablets, iPad, Android, & other smartphones