How to Inspect for Moisture Intrusion Course

Welcome to InterNACHI's free, online Moisture Intrusion Inspection Course. 
The goal of this course is to teach the student how to identify and report on moisture intrusion in homes and commercial buildings.
Upon successful completion of this course, the inspector will be able to:
  • identify and describe specific details of building that may cause moisture-related problems;
  • describe the design, construction, and maintenance of houses and buildings that manage moisture effectively;
  • inspect for indications of moisture intrusion;
  • communicate how to prevent moisture intrusion by proper installation of systems and components;
  • understand how energy, moisture, water, and vapor moves through a building;
  • recognize evidence of structural damage and previous repair; and 
  • communicate to clients indications of moisture intrusion.
This course also teaches the best building practices and standards that make a home moisture-resistant. Building practices and construction techniques are essential for an inspector to understand. Building components that are defective, incorrectly installed, or simply missing can produce moisture-related problems. Moisture intrusion of a building can cause major structural damage and can threaten the safety of its occupants. Most E&O insurance claims in the inspection industry involve moisture intrusion. Once an inspector knows what properly installed building components looks like, then recognizing installation defects becomes easy. Education and training on the best and most recent building practices for controlling moisture are essential for every property inspector.
Course includes:
  • 36,515 words; 
  • 1.1 hours of video;
  • inspection and writing assignment;
  • research and writing assignment; 
  • 55 quiz questions in 5 quizzes;
  • 50-question final exam (drawn from a larger pool);
  • instant grading; and
  • a downloadable, printable Certificate of Completion.  

You will learn the following:

  • Scope and Approach
  • Moisture Moves
  • Inspecting for Moisture Intrusion
  • Inspectors and Codes
  • Moisture-Resistant Roof Systems
  • Roof Flashing 
  • Roof Ventilation and Insulation
  • Roof Overhangs and Projections
  • Roof Drainage, Gutters and Downspouts
  • Moisture-Resistant Wall System
  • Checking Windows and Doors
  • Flashing of Wall Components
  • Check Caulks and Sealants
  • Moisture-Resistant Foundations
  • Inspecting the Basement Foundation
  • Basement Wall Insulation
  • Slab-on-Grade Construction
  • Slab-on-Grade Insulation
  • Crawlspaces and Moisture
  • Checking Ground Clearances
  • Check Wood Preservative
  • Alternative Foundations
  • Moisture Vapor Control
  • Climate Considerations
  • Moisture Vapor Problems
  • Indoor Humidity Problems
  • Air Leakage and Major Moisture Problems
  • Vapor Retarder Major Problems
  • Mechanical Systems and Moisture
  • Efflorescence and Capillary Action
  • Construction-Phase Inspections
  • Water Management and Damage Prevention
  • Moisture Control for Homeowners
  • Where to Look for Problems
  • Bathroom Problems
  • Looking in the Utility Room
  • Looking for Attic Problems
  • Basement Moisture Problems
  • Laundry Moisture Problems
  • What to Look for Outside
  • Checking Roof Moisture Problems

How to Inspect for Moisture Intrusion Course

Course # 3702



Estimated hours for the average student

Academic Engagement

Reading online course instructional material at 140 words per minute


Watching and listening to instructional video


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 0.5




Studying & 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

44.0 clock hours. 4.4 CEU.

This course is free to all InterNACHI 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.  

Upon completion of this course and passing of the 50-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:


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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.
For TEXAS students:
Provider License #:10026
Course Approval #:31297

InterNACHI® Members:


Not a member yet?

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