1, the floor refers to the floor plane of the building, that is, the ground part of each floor inside the building. It is located inside the building and is used for people to walk, move and place furniture. The floor is usually horizontal, which is used to divide different functional areas of the building, such as living room, bedroom, kitchen and so on.
2. Roof refers to the top covering of a building, which is used to protect the building from the external environment, such as rain, sunshine and wind. The roof is located at the top of the building and is used for waterproof, heat insulation and other functions. Roofs are usually made of waterproof materials, such as tiles and asphalt rolls, to ensure the dryness and comfort of the interior of the building.