Healthy Homes, Part 6: Housing Structure Course

Welcome to InterNACHI's free, online Healthy Homes, Part 6: Housing Structure Course. This is part 6 of a 14-part Certified Healthy Homes Inspector certification program. This course is provided by our accredited college at

 Take the free online course now.


The goal of this course is to teach students the parts that have a bearing on a home's soundness, state of repair, and safety.


Upon successful completion of this course, students will be able to:

  • describe the basics of housing structure; 
  • list housing structure terminology;
  • identify types of foundations for houses; 
  • describe the basics of vapor barriers; 
  • identify parts of house framing; 
  • describe roof types; 
  • perform an inspection related to systems and components; 
  • generate observations related to the house structure; and 
  • produce written reports related to observations conducted at a house.

Course includes:

  • 33 InterNACHI® CE credit hours; 
  • 13,548 words; 
  • 25 quiz questions in 4 quizzes;
  • Inspection and writing assignment; 
  • Research and writing assignment;
  • 20-question final exam; and 
  • Certificate of Completion. 

You will learn the following topics:

  • Foundation
  • What is the foundation?
  • What Material is the foundation made out of?
  • The footing
  • Cracks and holes in the foundation walls
  • Concrete cracks
  • Problems with moisture
  • Vapor barriers
  • Vapor barriers for concrete slab homes
  • Wall and ceiling vapor barriers
  • House framing
  • Foundation sills
  • Flooring systems
  • Studs 
  • Interior walls
  • Stairways
  • Windows
  • Doors
  • Garage doors
  • Exterior house doors
  • Roof framing
  • Roofs
  • Exterior walls and trim
  • Putting it all together
Healthy Homes, Part 6: Housing Structure Course
Course #4810, Student Catalog 

Student WorkTime CalculationEstimated Clock Hour Time for the Average Student
Attendance for "Seat Time" 1# of minutes of student attendance / 502.7
Participation in Learning Activities 2# of minutes of online student participation / 501.5
Interactivity 3# of minutes of student interactivity / 500.5
Reading the Course Text 4# of words in the course / 100 words per minute / 502.7
Reading the Course Textbook 5# of words in the book / 100 words per minute / 501.3
Academic Engagement 6# of words in the course / 100 / 501.0
Direct Communication 7# of minutes of communication / 500.5
Instructional Video Learning 8# of minutes of video / 500.0
Reinforcement Q & A  9# of questions X 1.85 / 501.0
Writing Assignment of the Inspection  104.0 hours per assignment4.0
Writing Assignment of the Research  114.0 hours per assignment4.0
Academic Activities for an Inspection  128.0 hours for each inspection assignment8.0
Performing an Inspection  138.0 hours for each inspection8.0
Total clock hours
33.0 clock hours
33.0 InterNACHI CE Hours
3.3 CEU

In keeping with InterNACHI's commitment to Continuing Education, this online course is open and free to all members and can be taken repeatedly 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.