Reglet
![The flashing between the roof and wall fits into a riglet (groove) in the wall.](/Images/godic/202502/05/Rock_plants_on_a_stone_roof,_Upper_Midhope_-_geograph.org.uk_-_1889025921.jpg")
In architecture a reglet is 1.) a thin, flat band relating to mouldings or 2.) a groove in a wall or parapet for receiving the top edge of a flashing. In this usage it is also called a raggle and may be related to regle, a groove. If a flashing is simply applied to a surface then it is called a face reglet.