The living room in this house with an open plan in its social areas has a double-height ceiling that visually divides it from the kitchen positioned right behind it. The kitchen has a normal-height ceiling since it is placed beneath the landing on the upper floor. A draping area is hung to cover the gap between the ceilings and the wall. In terms of square footage, the living room is about 57 feet by 52 feet (17 meters by 16 meters). The ceiling height is 10 feet (3 meters). There are two types of ceilings you will find in homes like this one: flat and raised. With a flat ceiling, there's no drop from the top of the wall to the floor. So if something falls on the flat roof, it would only produce a sound like any other piece of furniture breaking. Raised ceilings are everywhere else but not in the living room because it wouldn't be able to support the weight of anything falling from above. A raised ceiling is made up of rows of joists that hold up sheets of plywood or other materials as they are called "ceiling boards". The distance between each board is called its "pitch". The pitch can be changed easily by screwing more or less screws into the walls at different points.