Ventilation Case Studies: Understanding How Ventilation Impacts Single- and Multifamily Housing

Properly designed ventilation is a key component of a healthy roof environment and exterior building envelope. A balanced intake and exhaust system will ensure the attic space is not retaining excess moisture that could result in damage to the roof decking material, excess mold, and mildew growth, ice dams causing shingle damage, algae growth, and water or mold stains on the interior ceiling and walls. Additionally, proper ventilation in the exterior building envelope can help prevent premature deterioration of the siding and roof covering materials. This course explains the fundamentals of attic and envelope ventilation and highlights the importance of a balanced system, identifies the many venting options available, and discusses various ventilation case studies.

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

• Discuss how attic ventilation contributes to a healthy roof environment by decreasing moisture-laden air that can be detrimental to the roof decking because of potential mold and mildew growth.
• Recall how airflow occurs in the attic environment and describe how to balance intake and exhaust ventilation in order to properly remove moisture from the attic space to reduce structural damage such as premature shingle aging, ice dams, and algae growth.
• Explain how to calculate the ventilation needs for a project in order to ensure a balanced system that can help reduce heating and cooling costs.
• Recall the building code requirements for attic ventilation to ensure the required number of vents.
• Identify the types of ventilation products available and discuss various case study applications.

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

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