ASHI Cheat Sheet 2026

The 30 highest-yield ASHI facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. During a home inspection, a pier-and-beam foundation is found to have several wood piers that are out of plumb. What is the primary concern? → Out-of-plumb piers create eccentric loading that reduces their load-carrying capacity
2. A home inspector observes that a flush beam (dropped beam) supporting floor joists is visibly deflecting. What should be reported? → Excessive deflection indicates the beam may be undersized, overloaded, or damaged
3. A home inspector observes that roof valley flashing appears to be open (exposed metal) rather than closed (covered by shingles). What should the inspector note? → Open valleys are an acceptable method if properly installed
4. When inspecting a crawl space, which observation indicates the most serious structural deficiency? → Wood posts resting directly on bare soil without footings
5. What is an essential aspect of plumbing, electrical & hvac systems? → Conducting detailed inspections using standards of practice
6. What condition is indicated when a homeowner reports that the fireplace 'smokes back' into the room on cold days? → Cold stack effect causing a downdraft that overpowers the warm draft
7. An inspector finds a GFCI outlet in a bathroom that does not trip when tested. What should the inspector report? → The GFCI protection is non-functional and should be evaluated by an electrician
8. What is an essential aspect of exterior & roofing? → Conducting detailed inspections using standards of practice
9. What is an essential aspect of plumbing, electrical & hvac systems? → Conducting detailed inspections using standards of practice
10. A crawl space vapor retarder should cover: → At least the exposed soil of the crawl space floor, lapped and sealed at seams
11. In a crawl space, wood structural members should maintain what minimum clearance above exposed soil? → 18 inches
12. Which condition most commonly indicates inadequate attic ventilation? → Staining or moisture damage on the underside of roof sheathing
13. What is the minimum recommended clearance between wood siding and the roof surface to prevent moisture damage? → 2 inches
14. What is the PRIMARY purpose of obtaining ASHI certification in ASHI Certified Home Inspector? → To demonstrate verified competency and adherence to professional standards
15. An ASHI inspector observes that bathroom exhaust fans terminate in the attic space rather than at the exterior. This is considered: → A deficiency that introduces moisture into the attic
16. How does the ASHI body of knowledge relate to daily professional practice? → It provides the foundational framework that guides decision-making and standard practices
17. A home inspector finds that the flue liner in a masonry chimney is missing. What is the recommended action? → Report it as a deficiency and recommend evaluation by a qualified chimney specialist
18. What minimum clearance is required between a gas-fired furnace and combustible materials in the side/front? → Clearances vary by manufacturer listing and must be verified on the unit's label
19. How does the ASHI body of knowledge relate to daily professional practice? → It provides the foundational framework that guides decision-making and standard practices
20. What does an ASHI inspector look for when evaluating foundation settlement? → Cracks, displacement, out-of-plumb walls, sticking doors, and sloped floors
21. Which pipe material is identified by its purple/lavender color and is commonly found in older mobile homes? → Polybutylene
22. A home inspector observes granule loss concentrated in specific patterns on asphalt shingles. What does this most likely indicate? → Hail damage or mechanical impact
23. What is an essential aspect of structural systems? → Conducting detailed inspections using standards of practice
24. What is an essential aspect of interiors, insulation & ventilation? → Conducting detailed inspections using standards of practice
25. A crawl space has support posts that are sitting directly on bare soil with no footings. This condition is a concern because: → The posts will absorb moisture and eventually rot, compromising structural support
26. What is an essential aspect of exterior & roofing? → Conducting detailed inspections using standards of practice
27. Why must crawl space vents be free of obstructions according to traditional ventilation standards? → To allow cross-ventilation that removes moisture-laden air and prevents wood decay
28. Which condition in a wood floor system would be MOST concerning to an ASHI inspector? → Joists notched at the top of their depth near mid-span
29. Which foundational principle is MOST important for success in the ASHI Certified Home Inspector profession? → Commitment to continuous learning, ethical practice, and quality outcomes
30. How does the ASHI body of knowledge relate to daily professional practice? → It provides the foundational framework that guides decision-making and standard practices