in sri lanka, plots are usually at least fenced with barbed wire. only the wealthy ones can afford real walls, often topped with bottle bottom fragments. To protect the owners from the curious views of the bypassers, the street side of the fences is usually equipped with blinds.
traditionally they were made from palmyrah leaves, but these degenerate within some years, and now people use metal sheets, rarely new. even old oil barrels, cut and bent straight, are used for this purpose. these materials now offer a wide variety of textures and colors.