Air Barriers (BC Energy Step Code Module 5)


This course meets the BC Energy Step Code Module 5: Air Barriers mandatory training for builders as required by BC Housing (as of Oct 2022).

We gratefully acknowledge the financial support of BC Housing through the Building Excellence Research & Education Grants Program.

Intermediate Level

2 Sections

9–12 Hours

Bundle and Save!

Blue House Energy provides 3 modules for builders needing competency training to renew their license. To suit your training needs, you can purchase them separately or in any combination of two, or all three.

One Module

Purchase any single Module for $110

Two Modules

Purchase any two Modules for $200

Three Modules

Purchase all three Modules for $285


Course Overview

This module covers a range of air barrier approaches for roof, wall, floor and party wall assemblies, including design and installation practices.

The training goals for this course are:

  • Select an appropriate air barrier approach for a given roof, wall, floor, and party- wall assembly based on performance, cost- effectiveness, and constructability, bearing in mind current and future BCESC requirements

  • Apply knowledge of the correct design and installation practices for a given air barrier approach to properly manage the planning, installation, and testing of the building’s complete air barrier

Important Details

  • This course takes 9-12 hours to complete (including reviews, quizzes, etc.)

  • The course is made up of an introduction and 2 sections. A downloadable study guide can be found under the ‘Resource’ Tab in your training plan

  • There is a review and quiz at the end of each section. You can review any section as many times as you like.

  • Once you have completed all of the sections, you can take the final test (you may only take it once)

  • A grade of at least 70% earns you a Certificate of Achievement

  • Like all BHE courses, you have access for 12 months

  • The course is best viewed on a laptop or desktop. It works on tablets, but it’s really hard to see all the detail on a phone!

  • Sales within Canada are subject to GST/HST

  • Download course outline


*Usually called Modules


Importance of Air Sealing

Fundamentals of Air Sealing

What is an Air Barrier?

Section 1: Importance of Air Sealing

Control Air and Moisture Flows




Code Requirements

Program Targets

4 Air Barrier Considerations

Design and Construction

Interior Air Barriers

Exterior Air Barriers

Cost Trade Offs





Section 2: Air Sealing Application

Key Factors for Success



Air Sealing Details for Assemblies



Above Grade Walls

Exposed Floors


Barriers to Successful Installation

Construction Practices

Trades Education

Qualitative & Quantitative Testing


Quality Control

Learning Objectives

Section 1

  • Appreciate the importance of the building air barrier as a way of significantly improving energy efficiency with minimal construction cost implications

  • Understand how airtightness impacts energy performance from code minimum to current practices to best practice

  • Describe the four attributes of a correctly installed building air barrier: air impermeability, durability, continuity, and stiffness

  • Compare the design and construction sequence considerations of typical interior and exterior air barrier systems, including key details for implementing them successfully

Section 2

  • List the key factors that contribute to the successful installation of a complete air barrier system

  • Manage the key wood-frame construction practices that can interfere with achieving a successful air barrier, including coordination and education for all trades interacting with the enclosure

  • Coordinate qualitative and quantitative testing at the appropriate times, and use results to track quality control of the air barrier

Credit Values

Completing this course qualifies you for:

BC Housing: 2.5 CPDs