What is the primary purpose of flashing around windows and doors?

The primary purpose of flashing around windows and doors is to direct water away from these openings. Flashing is a thin material, often made of metal or a durable synthetic, that is strategically installed to prevent moisture penetration. It guides any water that comes into contact with the window or door frame away from the building structure, thereby helping to prevent leaks and water damage.

By effectively channeling water away, flashing plays a critical role in maintaining the integrity of the building envelope, especially in protecting vulnerable areas like windows and doors that are prone to water infiltration. This helps to reduce the risk of mold, rot, and structural damage over time, ensuring the longevity and safety of the building.

Other options, such as providing insulation, are not the primary functions of flashing, although insulation may be part of a comprehensive approach to energy efficiency. Supporting the structure focuses on load-bearing elements, while adding decorative elements is unrelated to the functional objectives of flashing. Hence, the role of flashing is specifically geared towards water management and protecting against moisture intrusion.