Minecraft wiki entry for Roof_types, associated text: This design was also used in some Georgian and early Victorian terraced houses, and it is quite a common design in central London. Note that for a London roof, this roof shape is placed at the back of the property, usually behind either a conventional gable roof or a facade. The central gutters tend to be prone to leaks. In this image the main roof has been made of red brick, and the borders with adjacent properties have been marked with dark wood.