Critical Elements in Specifying Underslab Moisture & Gas Barriers

A vapor/gas barrier is one of the most economical yet essential components of a home or commercial building in preventing moisture- and gas-related problems and ensuring healthy indoor air quality. This course reviews the critical properties that require consideration when specifying underslab vapor barriers and gas/moisture barriers and includes discussions on the basic installation guidelines to help ensure a successful installation.

Upon completion of this course, the Learner should be able to:

• Define the terms “vapor barrier” and “gas/moisture barrier” and explain when an underslab barrier is necessary to ensure a healthy environment and to avoid structural deterioration.
• Identify the three critical properties and minimum values listed in ASTM E1745 and explain how to apply them when selecting a barrier based on building design and performance requirements.
• State the design elements required for a successful radon gas barrier based on EPA guidelines.
• Explain the basic installation guidelines for vapor barriers and gas/moisture barriers to help ensure a successful installation.

Approximately 1 hour. Delivered online, at your own pace.

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