The screed is the part of the floor that can be found between the supportive floor (e.g. vaults) and flooring.
Independent of the place and demands, the bottom floor can exist of one screed or a real sandwich like construction. Eventually it is finished with a final layer of screed.
As bottom floors are submitted to differential tensions, as a cause of the temperature swings the settlement of the carcass, it is necessary to provide insulation at the sides and movement joints between the different spaces.
If the space is larger than 40 m² or, in one direction, longer than 8 meter, one has to provide extra intermediate movement joints. This is also advisable at a form change in a room (e.g. an L-shaped living room) when the finishing screed is floating (if it is applied onto insulation plates or SCHUBO filling), it will do to pull the movement joints through the final screed and floor finishing.
In the case of a solid screed (or a cement binded floor) the movement joint has to be pulled through the supportive floor. In the joint, a compressible 5 mm insulation strip is provided. The joint in the finished floor is completed with inox or brass corner profiles against which the floor stops on every side of the joint. The joint between two profiles is kit off with a flexible staying kit.