Illinois Roofing Practice Exam 2025 - Free Roofing License Practice Questions and Study Guide

Question: 1 / 745

What is the primary function of flashing in roofing?

To improve insulation properties

To protect against water seepage

The primary function of flashing in roofing is to protect against water seepage. Flashing is typically made of metal or other waterproof materials and is installed in areas where the roof design creates potential vulnerabilities to water intrusion, such as around chimneys, vents, skylights, and roof valleys. Its purpose is to direct water away from these critical junctions and ensure that it flows down the roof, minimizing the risk of leaks and water damage to both the roofing system and the underlying structures.

While improving insulation properties, enhancing roof aesthetics, and supporting roofing structures are important aspects of a roof's design and performance, they do not directly relate to the specific function of flashing. Flashing's unique design effectively serves as a barrier against water, making it essential for maintaining the integrity and longevity of the roofing system.

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To enhance roof aesthetics

To support roofing structures

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