In Paraguay, Argentina, Uruguay, the termination of the water-repellent insulating membrane of the roofs, at its meeting with the walls or perimeter loads, is called babeta. sheet metal and the wall, to prevent water leaks into the home.

In construction prior to the 1960s, reinforced concrete slabs were assembled with steel reinforcing bars of larger sections (fewer bars of larger sections), compared to the way they are assembled today (more bars of smaller diameters), although the amount of iron was maintained. The reinforced concrete slabs expanded, generating cracks due to shear stress between the masonry and the ceiling slab, which were impossible to seal with the materials available at the time. The drogue acted as an umbrella that prevented water from entering through the crack that was generated between the ceiling slab and the masonry wall.