Minecraft wiki entry for Roof_construction_guidelines, associated text: This building has walls 'stepped' so that they move 'two along, then one up'. This is approximately equivalent to angling the building at 63°. Note how most of the roof blocks are in parallel pairs, following the course of the wall blocks under them. Note also how filler blocks (quartz in this image) are needed to close off the holes in the sides of the roof. For clarity, the sidewalls of the gable roof use dark wood, and the end steps have been replaced with sandstone.