What type of barriers should flashing connect to for effective drainage?

Flashing is a critical component in building construction used to direct water away from certain areas, particularly where different building materials meet, such as roofs, walls, and windows. For effective drainage, flashing should connect to water-resistive barriers.

Water-resistive barriers are designed to prevent water from penetrating through the wall assembly while allowing moisture vapor to escape. This is essential in maintaining the integrity of the structure, as it provides a layer of protection against water damage while still managing moisture levels within the walls. By properly connecting flashing to these barriers, water is effectively redirected away from vulnerable areas, helping to prevent leaks, deterioration, and mold growth.

Other types of barriers, such as structural, thermal, and vapor barriers, have different purposes. Structural barriers provide support and stability; thermal barriers help with insulation and energy efficiency; and vapor barriers are specifically aimed at controlling moisture movement in the form of vapor but do not necessarily manage water drainage effectively. Thus, the connection of flashing to water-resistive barriers is crucial for ensuring proper drainage and maintaining the overall health of the building.