What is the typical type of flashing used on horizontal surfaces?

Study for the HVAC Sheet Metal Block 2 Exam. Expand your knowledge with essential questions and detailed explanations. Prepare effectively for your certification test!

The typical type of flashing used on horizontal surfaces is base flashing. Base flashing serves as a waterproofing barrier at the junction of a sloped roof or other horizontal surfaces and vertical structures, such as walls. It is designed to direct water away from these key areas, preventing leaks and water infiltration that can cause damage to the underlying structure.

Base flashing is typically installed in conjunction with roofing materials to provide a seamless transitional layer that effectively manages water runoff and drainage. This type of flashing is essential for maintaining the integrity of the building by ensuring that water does not penetrate vulnerable points, which could lead to issues such as rot, mold, or structural degradation.

While flashing tape, copings, and continuous flashing all have specific applications in building construction and weatherproofing, they are not the standard choice for horizontal surfaces like base flashing is. Flashing tape is commonly used for sealing joints and seams, copings are often used along the top edges of walls, and continuous flashing is usually installed along the length of a roof plane. However, base flashing remains the primary method employed specifically for protecting horizontal surfaces against water intrusion.

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