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Course Description: AEC Daily: Extending the Life of the Roofing Assembly
Some roof underlayments can trap moisture, degrade insulation performance, and create excessive condensation accumulation. Breathable, self-adhering roof underlayments enhance the drying capacity of the roofing assembly and therefore improve roofing performance. This course investigates current developments in these easy-to-install, vapor-permeable roof underlayments that mitigate water intrusion, reduce long-term exposure to wetted substrates, and extend the life of the overall structure. The course concludes with several sample installations.
Utilize the history of roof underlayments to inform contemporary selections.
Recall the differences between asphalt felt and synthetic underlayment when specifying roof underlayments.
Define the roofing assembly barriers for heat, air, moisture, and vapor.
Demonstrate how vapor-permeable roof underlayments provide superior drying capacity over conventional roof underlayments and extend the life of the roofing assembly.
Utilize details of roof underlayment installations effectively to improve roofing performance.