_____-flashing should be inserted into mortar lines or into a groove cut into the face of the brick.

Counter-flashing is designed to be integrated into the mortar lines or grooves of brickwork to effectively manage water drainage and prevent moisture intrusion. This type of flashing is typically used in conjunction with other waterproofing elements to ensure that water is redirected away from vulnerable areas, such as the intersection between the roof and the wall.

The proper installation of counter-flashing is crucial because it provides an additional layer of protection against leaks, particularly in areas where different building materials meet. By ensuring that counter-flashing is installed in the brick's mortar lines or grooves, it creates a well-sealed barrier that directs water away from potential entry points.

In contrast, options related to base, top, or joint flashing refer to different applications or installation techniques that may not be specifically tied to the mortar line or groove integration seen with counter-flashing. Understanding these distinctions helps home inspectors accurately identify flashing types and their purposes during an inspection.