What material is typically used for flashing around windows and doors?

Flashing around windows and doors is primarily intended to direct water away from these vulnerable areas, preventing moisture intrusion and potential damage to the building structure. The use of thin metal strips is ideal because metal is durable, resistant to corrosion, and can effectively channel water to the exterior. It can be cut and shaped to fit tightly against the building materials and underlying structures, ensuring a secure, water-resistant seal.

Other materials presented do not serve this purpose effectively. For instance, plastic sheeting lacks the necessary rigidity and durability to function as effective flashing, particularly in varying weather conditions. Vinyl trim, while it can be aesthetically pleasing, does not have the same protective qualities against water as metal flashing. Wood veneer might deteriorate over time due to exposure to moisture, making it unsuitable for a task that requires long-term resistance to water. Therefore, thin metal strips are the clear choice for effective flashing around windows and doors.