How this course is built
This course follows the Home Inspection Manual for the National Home Inspector Examination (NHIE), chapter by chapter. Each lesson teaches one range of the manual's pages. A badge at the top of every lesson names the 2023 outline domain and task it serves, along with that task's weight, so you can see how much of the outline the page carries.
Every lesson has the same parts: the lesson body, a Numbers and Rules to Memorize table, and Key Terms. Each lesson ends with a Check on Learning. It tells you whether your pick was right and which option was, with no explanation. For the reasoning, use the separate question bank, where every item carries a written rationale.
The course runs in a set order. It opens with the property inspection chapters: site, exterior, roof, structure, insulation and ventilation, and interior. Next come the reporting and professional practice chapters, Domains 2 and 3. Then the course turns to electrical, cooling, heating, plumbing, fireplaces, appliances, and life safety. The last core lesson covers scheduling and taking the exam.
Practice exams run 200 items each, weighted 70 / 20 / 10 across the three domains. They report a raw percent. They never report a scaled score, because the Examination Board of Professional Home Inspectors (EBPHI) doesn't publish how a raw score converts to one. Read a practice percent as the share you got right, and nothing more.
The Examination Board of Professional Home Inspectors
The Examination Board of Professional Home Inspectors (EBPHI) is an independent, not-for-profit corporation, founded in 1999. Its stated mission has two parts. The first is to set the standard of competence for home inspectors. The second is to build consumer confidence in home inspection professionals.
The National Home Inspector Examination (NHIE) is the means EBPHI uses to pursue that mission. EBPHI encourages two kinds of bodies to adopt the NHIE for competency assessment: regulatory bodies in state and local governments, and professional membership organizations. EBPHI states that giving the examination shows home inspection professionals meet basic knowledge and practice requirements for the purposes of regulation. A passing result, it adds, serves the public, the government, and home inspectors alike.
Examination format
The NHIE contains 200 multiple-choice items. Of those 200, 25 are pretest items that are not scored, which leaves 175 items that count toward the score. Candidates are given four hours to complete the examination.
EBPHI names four references for the NHIE. The first is the National Home Inspector Exam Home Inspection Manual (2019). The second is the International Residential Code (IRC) for One- and Two-Family Dwellings (2021). The last two are NFPA codes: NFPA 101, the Life Safety Code Handbook (2021), and NFPA 70, the National Electrical Code (NEC) (2023).
Scoring
The NHIE is graded with a scaled score, the same kind of scoring system the ACT and the SAT use. EBPHI gives the reason. More than one version of the NHIE is in use, and the items on one version are not exactly as hard as the items on another. A scaled system evens out those differences in difficulty, so that candidates who sit different versions are scored fairly.
Scoring starts from the raw score, which is the number of items answered correctly. That raw score is converted to a scaled score between 200 and 800, and the passing scaled score is 500. The 2023 candidate packet prints no table or formula for the conversion. Without it, a raw percent cannot be turned into a scaled score.
The passing point for each examination is set by a criterion-referenced method. Each candidate is measured against a standard fixed in advance. Candidates are not graded on a curve, and they do not compete against one another or against a quota. Every item carries a difficulty rating, and working from those ratings, a panel of experts sets the passing score under the guidance of a psychometrician. After each administration of the examination, the psychometrician consultant also runs a statistical analysis.
The 2023 content outline
EBPHI publishes a content outline for the NHIE in its 2023 candidate packet. The outline rests on a role delineation study. It offers candidates study topics that may appear on the NHIE, and it gives the percentage of items drawn from each content area. The outline also states its own limit. It is neither a complete list of every topic the examination covers nor of every skill that a competent inspection calls for.
The outline has three levels. A domain is the broadest content area, and each domain carries a weight. A task is written as an action the home inspector takes, and each task carries its own weight inside its domain. Under every task, a heading reads Knowledge, and numbered statements follow it. In twelve of the thirteen Domain 1 tasks, those statements sit under lettered headings, A, B, C, and onward; this lesson calls each lettered heading a component group.
The three domains
The 2023 outline weights the three domains at 70, 20, and 10 percent. Domain 1, Property and Building Inspection/Site Review, carries 70 percent and holds 13 tasks. Domain 2, Analysis of Findings and Reporting, carries 20 percent across 4 tasks. Domain 3, Professional Responsibilities, carries 10 percent across 2 tasks. That makes 19 tasks in all.
Domain 1 tasks and weights
All thirteen Domain 1 tasks share one form. The home inspector identifies and inspects one part of the property. The purpose is the same in all thirteen: to assess the issues and defects that may affect people, or that may affect how the building performs. Only the subject changes from task to task, and the table lists each subject with its weight and its component groups.
| Task | Subject | Weight | Component groups |
|---|---|---|---|
| 1 | Site conditions | 5% | A. Vegetation, grade, drainage and retaining walls; B. Driveways, patios, and walkways; C. Pool and spa access barriers |
| 2 | Building exterior components | 5% | A. Wall cladding, flashing, trim, eaves, soffits and fascia; B. Exterior doors and windows; C. Decks, balconies, stoops, stairs, steps, porches and associated railings; D. Garage vehicle doors and operators |
| 3 | Roof components | 6% | A. Roof coverings; B. Roof drainage systems; C. Roof flashings; D. Skylights and other roof penetrations |
| 4 | Structural components | 6% | A. Foundation; B. Floor structure; C. Walls and vertical support structures; D. Roof and ceiling structures |
| 5 | Electrical systems | 7% | A. Electrical service (laterals, drops, entrance, equipment, and grounding); B. Components of service panels and subpanels; C. Wiring methods; D. Devices, equipment and fixtures; E. Alternative energy systems (solar, wind, generator); F. Electric vehicle service equipment |
| 6 | Cooling systems | 4% | A. Cooling; B. Distribution systems |
| 7 | Heating systems | 5% | A. Heating; B. Distribution systems; C. Vent systems |
| 8 | Insulation, moisture management systems and ventilation systems in conditioned and unconditioned spaces | 5% | A. Thermal insulation; B. Moisture management; C. Ventilation systems of attics, crawl spaces and roof assemblies |
| 9 | Mechanical exhaust systems | 5% | A. Mechanical exhaust systems (bath, kitchen, dryer); B. Indoor air management systems (heat recovery ventilators, make-up air) |
| 10 | Plumbing and fuel distribution systems | 6% | A. Water supply distribution system; B. Fixtures and faucets; C. Drain, waste and vent systems; D. Water heating systems; E. Fuel storage and fuel distribution systems; F. Sump pumps, sewage ejector pumps, related valves and piping |
| 11 | Interior components | 4% | A. Walls, ceiling, floors, doors and windows and other interior system components; B. Steps, stairways, landings and railings; C. Installed countertops and cabinets; D. Installed kitchen appliances; E. Smart home technology |
| 12 | Fireplaces, fuel-burning appliances and their chimney and vent systems | 6% | A. Solid fuel-burning (wood, pellet, coal) fireplaces and appliances; B. Gas and liquid fuel-burning (natural gas, propane) fireplaces and appliances |
| 13 | Common life safety equipment and systems | 6% | No lettered groups. Four knowledge statements: egress requirements; fire/safety and occupancy separation requirements; smoke alarm and carbon monoxide alarm placement; fire suppression/sprinkler system defects |
Electrical systems carry the largest Domain 1 weight, 7 percent. Cooling systems and interior components carry the smallest, 4 percent each. Five tasks carry 6 percent: roof, structural, plumbing and fuel distribution, fireplaces, and life safety. The remaining five carry 5 percent: site, exterior, heating, insulation with moisture management and ventilation, and mechanical exhaust. The thirteen weights add up to 70 percent. Across the thirteen tasks, the outline names 44 component groups.
The knowledge pattern
The statements under a Domain 1 component group follow a pattern of four. Most groups open with the same two: common types, materials, and terminology, then applicable construction standards and installation methods. Most go on to typical defects, and many close with common safety issues. The outline prints examples in parentheses after many statements, the defect and safety statements among them. For exterior doors and windows, the defect examples are cracked glass, missing flashings, and decayed wood, and the safety examples are safety glazing, egress, and an interior-keyed deadbolt.
Groups depart from the pattern in both directions. Some add statements. Thirteen groups add one on the typical methods and materials for modifications, repairs, and upgrades, and eleven of the thirteen name retrofits as well. They are the four structural groups, the first four electrical groups, both mechanical exhaust groups, and the first three plumbing groups. Roof coverings adds typical repair methods and materials instead. Eight groups add a principles statement: protection devices, the refrigerant cycle, heating system operation, vent system operation, heat transfer, moisture, air movement, and traps and vents.
Other groups leave parts out. No roof group and no structural group carries a safety statement, and neither do eleven other groups across Tasks 2 and 6 through 11. Three groups carry no defects statement: pool and spa access barriers, alternative energy systems, and electric vehicle service equipment. Moisture management lists typical causes where the pattern puts typical defects. Task 13 has no component groups at all, only four knowledge statements of its own.
Domain 1 component groups
The table gives every Domain 1 component group, its number of knowledge statements, and how it departs from the pattern of four. A group marked as following the pattern carries exactly the four statements and nothing else.
| Group | Statements | Departures from the pattern |
|---|---|---|
| 1A Vegetation, grade, drainage and retaining walls | 4 | Follows the pattern |
| 1B Driveways, patios, and walkways | 4 | Follows the pattern |
| 1C Pool and spa access barriers | 2 | Applicable safety standards and terminology, then common safety issues; no defects statement |
| 2A Wall cladding, flashing, trim, eaves, soffits and fascia | 3 | No safety statement |
| 2B Exterior doors and windows | 4 | Follows the pattern |
| 2C Decks, balconies, stoops, stairs, steps, porches and associated railings | 4 | Follows the pattern |
| 2D Garage vehicle doors and operators | 4 | Follows the pattern |
| 3A Roof coverings | 4 | Adds typical repair methods and materials; no safety statement |
| 3B Roof drainage systems | 3 | No safety statement |
| 3C Roof flashings | 3 | No safety statement |
| 3D Skylights and other roof penetrations | 3 | No safety statement |
| 4A Foundation | 7 | Adds modifications and retrofits; soil types and conditions; applied forces on foundation systems; water management. No safety statement |
| 4B Floor structure | 5 | Adds modifications and retrofits; applied forces on floor systems. No safety statement |
| 4C Walls and vertical support structures | 5 | Adds modifications and retrofits; applied forces on the wall structure. No safety statement |
| 4D Roof and ceiling structures | 5 | Adds modifications and retrofits; applied forces on roof and ceiling structures. No safety statement |
| 5A Electrical service | 7 | Adds modifications and retrofits; service amperage; service and equipment grounding and bonding |
| 5B Components of service panels and subpanels | 10 | Adds modifications, repairs, and upgrades; panel grounding and bonding; panel wiring; principles and purpose of protection devices; inspection safety procedures; known problem panel boards |
| 5C Wiring methods | 7 | Adds modifications, repairs, and upgrades; solid-conductor aluminum branch circuit wiring; outdated wiring systems |
| 5D Devices, equipment and fixtures | 7 | Adds modifications and retrofits; equipment grounding and bonding; where typical devices and equipment are located, how they are wired, and how they operate |
| 5E Alternative energy systems | 4 | Adds disconnect location; no defects statement |
| 5F Electric vehicle service equipment | 3 | No defects statement |
| 6A Cooling | 6 | Standards statement adds normal operation procedures; adds principles of the refrigerant cycle; condensate control and disposal |
| 6B Distribution systems (cooling) | 3 | No safety statement |
| 7A Heating | 8 | Standards statement adds normal operation procedures; adds principles of heating system operation; energy source connections and controls; condensate control and disposal; by-products of combustion and when they become a hazard |
| 7B Distribution systems (heating) | 3 | No safety statement |
| 7C Vent systems | 5 | Adds principles of vent system operation |
| 8A Thermal insulation | 6 | Adds principles of energy conservation and heat transfer; recommended insulation levels. The safety statement reads common health and safety issues |
| 8B Moisture management | 6 | First statement adds methods; adds principles of moisture generation, moisture movement, and relative humidity; effects of moisture vapor; moisture control systems; typical causes in place of typical defects. No safety statement |
| 8C Ventilation systems of attics, crawl spaces and roof assemblies | 5 | Adds principles of how air moves in building assemblies; conditioned or encapsulated attics and crawl spaces. No safety statement |
| 9A Mechanical exhaust systems | 6 | Adds modifications and retrofits; how mechanical systems relate to ventilation systems |
| 9B Indoor air management systems | 4 | Adds modifications and retrofits; no safety statement |
| 10A Water supply distribution system | 5 | Adds modifications and retrofits; water pressure and functional flow problems. No safety statement |
| 10B Fixtures and faucets | 5 | Adds modifications and retrofits |
| 10C Drain, waste and vent systems | 6 | Adds modifications and retrofits; principles and usage of traps and vents; public and private disposal systems compared. No safety statement |
| 10D Water heating systems | 8 | Adds accessory items; energy source connections and controls; combustion air requirements; condensate control and disposal |
| 10E Fuel storage and fuel distribution systems | 4 | Follows the pattern |
| 10F Sump pumps, sewage ejector pumps, related valves and piping | 4 | Adds pump and discharge locations; no safety statement |
| 11A Walls, ceiling, floors, doors and windows and other interior system components | 4 | Splits typical defects in two: surface defects that defects in other systems cause, and surface defects NOT caused by other systems. No safety statement |
| 11B Steps, stairways, landings and railings | 4 | Follows the pattern |
| 11C Installed countertops and cabinets | 4 | Follows the pattern |
| 11D Installed kitchen appliances | 4 | Standards, installation methods, and terminology in one statement; adds basic operation using normal controls |
| 11E Smart home technology | 3 | Emerging technologies, applications, terminology, and operations; common defects and potential issues; considerations and limitations of inspecting homes with smart technology. No safety statement |
| 12A Solid fuel-burning fireplaces and appliances | 9 | Adds vent types, vent connectors, and chimneys; masonry fireplace types and flues; chimney foundation, height, clearances, and terminations; combustion air, fuel types, and combustion characteristics; how equipment, components, and accessories operate |
| 12B Gas and liquid fuel-burning fireplaces and appliances | 9 | Same shape as 12A; the fireplace statement covers masonry and manufactured types, and the chimney statement drops foundation |
| 13 Common life safety equipment and systems | 4 | No component groups; four knowledge statements of its own |
Domain 2 tasks
Domain 2, Analysis of Findings and Reporting, covers what the inspection report tells the client. Its four tasks run from describing what was inspected, to stating what was not, to describing defects, to describing what needs further evaluation or action. Tasks 1 and 2 carry 4 percent each, and Tasks 3 and 4 carry 6 percent each.
| Task | Weight | Knowledge statements |
|---|---|---|
| 1. Inform the client of what was inspected and the methodologies used, and describe each building system and component by what distinguishes it (purpose, type, size, location) | 4% | Minimum and critical information in the report; the type of systems and where their components are; common methods of inspecting particular components, such as walking on the roof or viewing an attic or crawl space from the hatch; test instruments, common and emerging, and how to use them properly, such as moisture meters, carbon monoxide meters, and infrared cameras |
| 2. Describe the limitations in the report, so the client knows which items were NOT inspected, and the reason | 4% | Common limitations, such as environmental factors, inspection safety limitations, and inaccessible areas or components; the limitations of a visual inspection; limitations caused by smart and emerging technology |
| 3. Describe inspected systems and components that are defective or not functioning properly | 6% | Expected service life of the building's components and its mechanical components; common indicators of potential failure, such as excessive or unusual noise or vibration, rust and corrosion, and a lack of routine maintenance; common defects and how they are described; common safety issues; what might occur if identified defects are not repaired |
| 4. Describe systems and components that need further evaluation or action | 6% | The qualified professional or tradesperson needed to complete repairs or evaluate further; how components in the building relate to one another; life-threatening safety hazards that warrant immediate action, such as a gas leak, carbon monoxide accumulation, or exposed energized wires |
Domain 3 tasks
Domain 3, Professional Responsibilities, covers the agreement with the client and the conduct of the inspector. It has two tasks, and each carries 5 percent.
| Task | Weight | Knowledge statements |
|---|---|---|
| 1. Discuss and obtain, with the client or the client's representative, a written pre-inspection agreement covering scope, limitations, and terms of services; the agreement establishes the inspector's and the client's rights and responsibilities | 5% | Purpose of the agreement; its typical elements, such as limits of liability, exclusions and limitations, and dispute resolution; considerations related to privacy; when the agreement is delivered and signed |
| 2. Maintain the quality, integrity, and objectivity of the inspection process | 5% | Fundamental legal concepts, such as contractual responsibility, negligence, and the governing regulations that apply; conflicts of interest, such as an inspector's interest in the property or third parties with a financial stake in the outcome; the types and purpose of financial protection, such as general liability, errors and omissions insurance, and warranties; protecting the client's interest, such as privacy of information, cameras or listening devices in the house, and report confidentiality |
Appendix A2, the manual's printed outline
Volume 1 of the manual prints a content outline of its own as Appendix A2. It opens on the same frame as the 2023 outline. It rests on the role delineation study as well, it offers candidates study topics, and it gives the percentage of questions for each content area. It carries the same disclaimer as well: the outline lists neither every topic on the examination nor every skill a competent inspection requires.
Appendix A2 is an older version of the outline. Its domain weights are 63 percent for Domain 1, 25 percent for Domain 2, and 12 percent for Domain 3, and several of its task weights differ too. EBPHI's 2023 candidate packet prints the current outline, with weights of 70, 20, and 10 percent. The current NHIE is built to the 2023 weights. Where Appendix A2 and the 2023 outline give different weights, the 2023 figure is the current one.
Weights compared
In Domain 1, five tasks changed weight between the two versions: structural, electrical, insulation with moisture and ventilation, plumbing, and Task 13, which also changed subject. In Domain 2, Task 1 fell from 6 to 4 percent, Tasks 3 and 4 rose from 5 to 6 percent, and Task 5 was dropped. In Domain 3, Task 1 fell from 7 to 5 percent.
| Domain or task | Appendix A2 (older) | 2023 outline (current) |
|---|---|---|
| Domain 1, Property and Building Inspection/Site Review | 63% | 70% |
| 1. Site conditions | 5% | 5% |
| 2. Building exterior components | 5% | 5% |
| 3. Roof components | 6% | 6% |
| 4. Structural components | 4% | 6% |
| 5. Electrical systems | 6% | 7% |
| 6. Cooling systems | 4% | 4% |
| 7. Heating systems | 5% | 5% |
| 8. Insulation, moisture management, and ventilation systems | 4% | 5% |
| 9. Mechanical exhaust systems | 5% | 5% |
| 10. Plumbing systems (A2); plumbing and fuel distribution systems (2023) | 5% | 6% |
| 11. Interior components | 4% | 4% |
| 12. Fireplaces, fuel-burning appliances, and their chimney and vent systems | 6% | 6% |
| 13. Kitchen appliances (A2); life safety equipment and systems (2023) | 4% | 6% |
| Domain 2, Analysis of Findings and Reporting | 25% | 20% |
| 1. What was inspected, and system descriptions | 6% | 4% |
| 2. Limitations (A2 adds inspection methods) | 4% | 4% |
| 3. Systems not functioning properly or defective | 5% | 6% |
| 4. Further evaluation or action | 5% | 6% |
| 5. Implications of defects (A2 only) | 5% | No such task |
| Domain 3, Professional Responsibilities | 12% | 10% |
| 1. Written inspection contract (A2); written pre-inspection agreement (2023) | 7% | 5% |
| 2. Quality, integrity, and objectivity | 5% | 5% |
Structural differences
The two versions also differ in shape. Appendix A2 has 20 tasks and the 2023 outline has 19, because Domain 2 lost its fifth task. Task 13 changed subject. In Appendix A2 it covers permanently installed kitchen appliances, while in 2023 it covers life safety, and the kitchen appliances moved into Task 11. Appendix A2 numbers its statements with roman numerals, and the 2023 outline uses ordinary numbers.
| Area | Appendix A2 (older) | 2023 outline (current) |
|---|---|---|
| Task count | 20: 13, 5, and 2 | 19: 13, 4, and 2 |
| Domain 1 component groups | 40 | 44 |
| Second statement of the pattern | Applicable standards and installation methods | Applicable construction standards and installation methods |
| Principles statements | Worded as theory: theory of the refrigerant cycle, of heat transfer, of vent system operation, and so on | Worded as principles in all eight groups that carry one |
| Place of typical defects in a longer group | Right after the standards statement, or after the repair or modifications statement where a group has one, and ahead of the other added statements, in every lettered group but 10C | Moves after the other added statements in eleven groups: 5A to 5D, 6A, 7A, 7C, 8A, 9A, 10D, and 10F. 10C already had it there. The structural groups, 8C, and 10A keep the Appendix A2 order |
| Task 1 group A standards statement | Adds clearance | No clearance |
| Task 2 group C name | Ends with applicable railings | Ends with associated railings |
| Domain 1 Task 13 | Common permanently installed kitchen appliances, inspected for condition and operation, four statements | Common life safety equipment and systems, four statements |
| Kitchen appliances | Task 13 | Task 11, group D |
| Egress, fire and occupancy separation, smoke and carbon monoxide alarms | Statements under Task 11, group A | Task 13, which adds fire suppression and sprinkler system defects |
| Task 11 groups | A to D; D is smart homes, one statement | A to E; E is smart home technology, three statements |
| Task 12 | One list of ten statements, no lettered groups | Group A, solid fuel-burning, and group B, gas and liquid fuel-burning, nine statements each |
| Task 5 groups | A to E | A to F; F is electric vehicle service equipment |
| Task 5 group B | Interior components of service panels and subpanels | Components of service panels and subpanels |
| Task 5 groups A and D, grounding | Service grounding and bonding (A); equipment grounding (D) | Service and equipment grounding and bonding (A); equipment grounding and bonding (D) |
| Task 5 group C, older wiring | Obsolete wiring systems; concerns and considerations on aluminum wiring with solid conductors | Outdated wiring systems; considerations for solid-conductor aluminum branch circuit wiring |
| Task 5 group E | Alternative energy systems; solar and wind as examples | Solar, wind, and generator in the heading |
| Task 3 group A, roof coverings | Six statements, with characteristics of different roofing materials, and sheathing and underlayment requirements | Four statements, without those two |
| Task 4 group A, foundation defects | Typical defects together with their common causes and effects | Typical defects alone |
| Task 4 group C, walls | Construction methods and hardware resistant to seismic and wind forces | Applied forces and their effect on the wall structure |
| Cooling and heating, group A of Tasks 6 and 7 | Each lists testing methods and alternative energies; cooling has no safety statement | Neither listed; normal operation procedures join the standards statement; cooling gains a safety statement; heating gains energy source connections and controls |
| Task 8 group A, insulation | Common safety issues | Common health and safety issues |
| Task 8 group B, moisture | A typical defects statement | Typical causes in place of typical defects |
| Task 8 group C, ventilation | Closed attics and crawl spaces; requirements for the screening, sizing, and location of ventilation openings | Conditioned or encapsulated attics and crawl spaces; no statement on screening, sizing, or location |
| Task 10 subject | Plumbing systems | Plumbing and fuel distribution systems |
| Task 10 group C, disposal | Identifying whether disposal is public or private, where possible | Differences between public and private disposal systems |
| Task 10 group D, water heating | Seven statements, none on condensate | Eight, adding condensate control and disposal |
| Task 10 group F name | Opens with drainage systems | Opens with sump pumps |
| Domain 2 implications of defects | Task 5, with two statements of its own | A statement under Task 3 |
| Domain 2 inspection methods and test instruments | Under Task 2, with the limitations | Under Task 1; Task 2 holds limitations only, adding the limits of a visual inspection and of smart and emerging technology |
| Domain 2 Task 4, who does the repair | The correct professional or tradesperson to effect repairs | The qualified professional or tradesperson to complete repairs |
| Domain 2 life-threatening hazards | When to inform building occupants immediately | Hazards that warrant immediate action |
| Domain 3 Task 1 | Written inspection contract; its elements include jurisdictional requirements | Written pre-inspection agreement; adds considerations related to privacy |
| Domain 3 Task 2 legal concepts | Fiduciary and contractual responsibility | Contractual responsibility; fiduciary is not named |
Numbers and Rules to Memorize
Appendix A2 rows are the older version. The statement count for each single group stays in the two group tables above.
| Item | Value |
|---|---|
| EBPHI | Independent, not-for-profit corporation, founded 1999 |
| NHIE items | 200 multiple-choice items; 25 unscored pretest items; 175 scored (200 minus 25) |
| Time | Four hours |
| Raw score | Number of items answered correctly; the packet prints no conversion to a scaled score |
| Scaled score | 200 to 800; passing scaled score 500 |
| Passing point | Criterion-referenced, against a standard fixed in advance; no curve, no quota; set from item difficulty ratings by a panel of experts guided by a psychometrician |
| References | Home Inspection Manual 2019; IRC 2021; NFPA 101 Life Safety Code Handbook 2021; NFPA 70 NEC 2023 |
| 2023 domain weights | Domain 1, 70%; Domain 2, 20%; Domain 3, 10% |
| 2023 task count | 13, 4, and 2; 19 in all |
| 2023 Domain 1 task weights | Tasks 1 to 13: 5, 5, 6, 6, 7, 4, 5, 5, 5, 6, 4, 6, 6 percent; electrical largest at 7 |
| 2023 Domain 2 task weights | Tasks 1 to 4: 4, 4, 6, 6 percent |
| 2023 Domain 3 task weights | Tasks 1 and 2: 5 and 5 percent |
| 2023 Domain 1 component groups | 44; Task 13 has none |
| Knowledge pattern | Types, materials, and terminology; applicable construction standards and installation methods; typical defects; common safety issues |
| No safety statement | Every roof group and every structural group; 19 of the 44 groups in all |
| Other departures, 2023 | 13 groups add a modifications statement; 8 add a principles statement; 3 carry no defects statement |
| Outline limit | Not a complete list of topics, and not every skill a competent inspection needs |
| Appendix A2 domain weights (older) | 63%, 25%, 12%; not current |
| Appendix A2 task count (older) | 13, 5, and 2; 20 in all; 40 Domain 1 component groups |
| Appendix A2 task weights (older) | Domain 1: 5, 5, 6, 4, 6, 4, 5, 4, 5, 5, 4, 6, 4; Domain 2: 6, 4, 5, 5, 5; Domain 3: 7, 5 |