How to Inspect Manufactured and Mobile Homes Course

Welcome to InterNACHI's free, online How to Inspect Manufactured and Mobile Homes course.  

This course teaches the inspector how to perform the inspection of a manufactured or mobile home. It is based upon the U.S. Housing and Urban Development's Standards for Manufactured and Mobile Homes.

Upon successful completion, the student will be able to:
  • Define the differences between manufactured and mobile homes;
  • Inspect the system and components, including, body frame, insulation, plumbing, HVAC, electrical, foundation;
  • List the different types of foundations and supports; and
  • Inspect the accessory buildings and structures; and
  • Communicate to clients indications of defects observed.
Course includes:
  • 46,372 words;
  • student book;
  • inspection and writing assignment;
  • research and writing assignment;
  • 143 quiz questions in 13 quizzes;
  • a 75-question final exam (drawn from a larger pool);
  • instant grading; and
  • a downloadable, printable Certificate of Completion.


How to Inspect Manufactured and Mobile Homes Course

Course # 3404



Estimated hours for the average student

Academic Engagement

Reading online course instructional material at 140 words per minute


Taking quizzes


Taking the exam


Conducting a directed and independent inspection study performed according to the Standards of Practice, including the development of an inspection report


Submitting an inspection and writing assignment


Submitting a research and writing assignment




Studying and reviewing instructional material in preparation for taking quizzes and exam 


Reading the downloaded student course book including taking the quizzes with the book

Reading, research, and studying related to completing the research and writing assignment


Studying and preparing for inspection processes according to a Standards of Practice, including capturing and storing digital images with a camera or device, making observations, evaluating conditions, deducing, formulating opinions, communicating observations in written form, attaining competency in performing inspections and using an inspection checklist or software and other inspection tools in producing a report. 



Sub Total


Overall Total

45.0 hours / 1.1 SCH

And, in keeping with InterNACHI's commitment to Continuing Education, this online training course is open and free to all members, and can be taken again and again, without limit.
Reminder to members:  InterNACHI's Code of Ethics 1.10 requires that you comply with all government rules and licensing requirements of the jurisdiction where you conduct business.  InterNACHI's courses and Standards generally exceed the Standards of Practice that you are required to abide by locally.  
This course has been approved by:

The course covers the following categories:
  Mobile vs. Manufactured   
  8 x 40 or 320   
  HUD’s Role   
  Securing the Home to the Foundation   
Section 1: General    
  1.1 Scope   
  1.2 Definitions   
  1.3 Data Plate   
  1.4 Serial Number   
  1.5 Certification Label   
Section 2: General Interior Requirements    
  2.1 Scope   
  2.2 Definitions   
  2.3 Light and Ventilation   
  2.4 Ceiling Heights   
  2.5 Exit Facilities and Exterior doors   
  2.6 Exit Facilities and Egress Windows and Devices   
  2.7 Interior Privacy   
  2.8 Interior Passages   
  2.9 Room Requirements   
  2.10 Minimum Room Dimensions   
  2.11 Toilet Compartments   
  2.12 Hallways   
  2.13 Glass and Glazed Openings   
Section 3: Fire Safety    
  3.1 Scope   
  3.2 Definitions   
  3.3 Flame Spread Limitations and Fire Protection Requirements   
  3.4 Kitchen Cabinet Protection   
  3.5 Carpeting   
  3.6 Fireblocking   
  3.7 Requirements for Foam Plastic Thermal Insulating Materials   
  3.8 Smoke Alarm Requirements   
Section 4: Body and Frame    
  4.1. Scope   
  4.2. Definitions   
  4.3 General   
  4.4 Materials   
  4.5 Structural Design Requirements   
  4.6 Windstorm Protection   
  4.7 Resistance to Elements and Use   
Section 5: Thermal Protection    
  5.1 Scope   
  5.2 Definitions   
  5.3 Condensation Control and Installation of Vapor Retarders   
  5.4 Air Infiltration   
  5.5 Heat Loss Certificate   
  5.6 Comfort Cooling Certificate and Information   
Section 6: Plumbing Systems    
  6.1 Scope   
  6.2 Definitions   
  6.3 General Requirements   
  6.4 Materials   
  6.5 Joints and Connections   
  6.6 Traps and Cleanouts   
  6.7 Plumbing Fixtures   
  6.8 Hangers and Supports   
  6.9 Water Distribution Systems   
  6.10 Drainage Systems   
  6.11 Vents and Venting   
Section 7: Heating, Cooling and Fuel-Burning Systems    
  7.1 Scope   
  7.2 Definitions   
  7.3 Minimum Standards   
  7.4 Fuel Supply Systems   
  7.5 Gas Piping Systems   
  7.6 Oil Piping Systems   
  7.7 Heat Producing Appliances   
  7.8 Exhaust Duct System and Provisions for the Clothes Dryer  
  7.9 Appliances   
  7.10 Venting, Ventilation and Combustion Air   
  7.11 Instructions   
  7.12 Marking   
  7.13 Accessibility   
  7.14 Appliances: Cooling   
  7.15 Circulating Air Systems   
Section 8: Electrical Systems    
  8.1 Scope   
  8.2 Definitions  
  8.3 Power Supply   
  8.4 Disconnecting Means and Branch-Circuit Protective Equipment   
  8.5 Branch Circuits Required   
  8.6 Receptacle Outlets   
  8.7 Fixtures and Appliances   
  8.8 Wiring Methods and Materials   
  8.9 Grounding   
  8.10 Outdoor Outlets, Fixtures, Air-Conditioning Equipment, Etc.   
  8.11 Painting of Wiring   
  8.12 Polarization   
Section 9: Foundation    
  9.1 Basic Requirement   
  9.2 Chassis Removal   
  9.3 Underfloor Ventilation   
  9.4 Separation From Ground   
  9.5 Site Preparation   
  9.6 Erosion   
  9.7 Site   
  9.8 Vapor Retarder   
  9.9 Connections   
  9.10 Flood Resistance   
  9.11 Egress Requirements   
Section 10: Standard Set Foundation    
  10.1 General   
  10.2 Frost Line   
  10.3 Footings   
  10.4 Block Piers   
  10.5 Block Pier Caps   
  10.6 Block Pier Shims   
  10.7 Block Pier Wedges  
  10.8 Prefabricated Piers   
  10.9 Support Requirements   
  10.10 Marriage Line Supports   
  10.11 Anchoring   
  10.12 Ties   
  10.13 Spacing   
Section 11: Permanent Foundation    
  11.1 Content   
  11.2 Frost Line   
  11.3 Footings   
  11.4 Block Piers   
  11.5 Block Pier Caps   
  11.6 Block Pier Shims   
  11.7 Block Pier Wedges   
  11.8 Prefabricated Piers   
  11.9 Support Requirements   
  11.10 Perimeter Supports   
  11.11 Marriage Line Supports   
  11.12 Piers   
  11.13 Location of Supports   
  11.14 Height of Installation   
  11.15 Permanent Foundation   
  11.16 Foundations for Existing Home   
  11.17 Basement Perimeter Support   
  11.18 Grading   
  11.19 Drainage   
  11.20 Anchoring   
Section 12: Accessory Buildings and Structures    
  12.1 Underfloor Space   
  12.2 Skirting   
  12.3 Underfloor Ventilation   
  12.4 Underfloor Access   
  12.5 Foundations and Ground Level Access   
  12.6 Carports and Awnings   
  12.7 Porches   
  12.8 Attached Garages   
  12.9 Decks, Porches, Landings, Stairs, Ramps, and Guardrails   
Section 13: Resources    

Upon completion of this course and passing of the 75-question final exam (drawn from a larger pool), the student can download and print their own Certificate of Completion which is auto-generated in their own name. 

The student's (InterNACHI member's) information is recorded on InterNACHI's servers for membership compliance verification, and automatically logs completion into InterNACHI's online Continuing Education log. 
Non-members may view only the first page of the course.
Members will need their username and password.  If you have forgotten your password, CLICK HERE (instant response) or email and request it (don't forget your name). 
InterNACHI... #1 in inspection education.

InterNACHI® Members:

Take the free, online How to Inspect Manufactured and Mobile Homes course now (free to InterNACHI members).

Not a member yet?

Join today for access to this and thousands of other InterNACHI® membership benefits.

Some features which make InterNACHI's courses superior to existing continuing education options:
  • The course is free for all InterNACHI members.
  • The course is written in pure XHTML code for quick loading.  The course loads fine on old computers and loads fast, even with dial-up.
  • The course is designed using a hierarchal menu coupled with a sequential page navigation.  This provides the student with the option to easily repeat areas of weakness.
  • The course permits the student to start, stop and restart any part of the course as often as desired.
  • There are a variety of images within the course, including diagrams, illustrations and photos. 
  • The illustrations can be enlarged for clearer viewing by clicking on them.
  • The text is integrated into InterNACHI's Inspector Glossary.  Rolling over blue-colored terms provides their definition.
  • The final exam uses multiple-choice questions that reference the images. 
  • The course's quizzes and final exam have numerous advantages over traditional exam systems:
    1. The course, quizzes and final exam incorporate built-in intelligence which identifies and strengthens each student's unique subject weaknesses.
    2. Not only is each question weighted with regard to score, but each answer is weighted, as well as the correctness of each answer being weighted.
      1. Answers to easy questions are weighted such that the student is penalized, in terms of score, for answering incorrectly, but rewarded modestly for answering correctly.
      2. Answers to difficult questions are weighted such that the student is rewarded, in terms of score, for answering correctly, but not penalized for answering incorrectly.
      3. Answers to questions regarding basic safety, or questions every inspector should know the answer to, are weighted such that the student is severely penalized, in terms of score, for answering incorrectly.
  • Upon passing the final exam, the student can print out a Certificate of Completion which is auto-generated in their own name.
The student's (InterNACHI member's) information is recorded on InterNACHI's servers for membership compliance verification, and automatically logs completion into InterNACHI's online Continuing Education log.

Why online inspector education is better than classroom inspector education.

InterNACHI® Members:

Take the free, online How to Inspect Manufactured and Mobile Homes course now (free to InterNACHI members).

Not a member yet?

Join today for access to this and thousands of other InterNACHI® membership benefits.