How does flashing differ from sealants, such as caulk and roofing cement?

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Flashing serves a crucial role in directing water away from critical areas of a structure, particularly where different materials meet, such as around chimneys, skylights, or wall-to-roof intersections. The purpose of flashing is to provide a more permanent solution to potential water intrusion than sealants.

In contrast, sealants such as caulk and roofing cement are often used to fill gaps and seams. However, these materials may degrade over time due to exposure to weather elements, temperature changes, and UV radiation. This degradation can necessitate regular inspection and replacement to maintain their effectiveness. As a result, while sealants can be very effective in their application, they generally do not have the longevity that flashing provides. Flashing is designed to withstand the test of time and typical weather conditions, thereby being a more durable solution in the long run when installed correctly.

Therefore, the distinction between flashing and sealants lies in their expected lifespan and the need for periodic maintenance. Flashing is integrated into the building’s structure and is intended to last for many years, whereas sealants often require reapplication over time to ensure they continue to protect against water infiltration effectively.

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