Cavity floor

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A cavity floor (also: hollow floor ) is a system floor construction with a flat supporting layer, which is stored on special substructures in order to form a cavity between the supporting layer and the raw ceiling for the implementation of installations for telecommunications , electrical connections, heating , ventilation , etc. The base layer often consists of poured screed mortar on a thin, component-integrated formwork. The component-integrated formwork usually consists of wood , plasterboard, cement fiberboard or special plasterboard . These formwork panels rest on supports made of metal or mineral materials. One variant is the so-called dry hollow floor with base layers made of panel materials. An inspection opening enables access.

The raised floor is similar, but does not have a flat supporting layer, but rather removable panels, which make every point of the room below the raised floor accessible at all times.

The performance records for these floors are based on EN 13213.


  • Jörn Krimmling: Facility Management: Structures and Methodical Instruments . Verlag Fraunhofer IRB Verlag, 2008, ISBN 3816774989 , pages 177–178 [1]