Credits: 1 AIA LU/HSW; 0.1 ICC CEU; 1 IIBEC CEH; 0.1 IACET CEU

It is a common question: “Do I need a vapor retarder on this roof?” The frustrating answer is often “it depends.” This presentation will uncover the differences between air barriers and vapor retarders and the benefits of each to improving the durability and efficiency of your building enclosure. Additionally, it will discuss critical installation details as it relates to the roof and roof/wall interface. Case studies will be presented to show real-world design and installation considerations and challenges. What’s new, what’s the same, and what to think about when you design roof assemblies in different climate zones and over different types of occupancies with varying construction types.

Learning Objectives:

1. Define the differences between air barriers and vapor retarders.
2. Cover how these materials impact roof and wall design and performance. 
3. Review code requirements and how to achieve compliance. 
4. Outline design and specification requirements to set achievable performance. 

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