Thin bed process

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The thin bed method is a laying technique for tiles or slab material using a factory-made thin bed mortar with an adhesive thickness of 2 to 6 mm, measured on the finished covering. The technical term -bed refers to the type of mortar bedding of the cladding material to be laid in thin, medium or thick bed.

Explanations

The thin-bed method is the most widely used method of laying tiles today. For the laying of natural stone it is the procedure that corresponds to the current state of the art. The thick-bed process can only be an exception in old buildings or for technical reasons due to the high water entry and the discoloration of the panels that may result from it.

The thin-bed process originally comes from the USA and was first introduced in Switzerland in the 1930s in Europe.

Thin-bed mortar / adhesive

The term “mortar” is used for hydraulically setting thin-bed mortar, while the term “adhesive” is used for dispersion and epoxy resin adhesives . Special thin-bed materials are modified adhesives from the three main groups mentioned above.

Laying technology

The thin-bed mortar / adhesive is z. B. applied with the help of a notched trowel in an evenly thick grooved application thickness on the substrate. The tiles are placed on the fresh adhesive bed before the skin begins to form and gently pushed in. The joints are scraped clean and excess material is washed off. After the adhesive bed has been allowed to dry, the covering is grouted in the classic / cement-based manner with grouting material, depending on the requirements . Movement, connection and maintenance joints are usually closed with elastic joint compound, such as B. silicone sealant.

Underground

Laying using the thin-bed method requires a surface that is as flat as possible (DIN 18202 Tab3-Z3 / 4), since with an average bed thickness of 2 to 5 mm, there is little opportunity to compensate for the on-site evenness and height tolerances.

The subsurface must:

  • be sufficiently flat
  • be sufficiently dimensionally stable and free of continuous cracks
  • the surface must be uniform and closed, sufficiently firm, free from release agents, loose components, efflorescence, dirt and dust
  • Components may only deform to a limited extent through shrinkage and creep
  • must not have any gypsum-bound leveling layers
  • do not exceed the specified residual moisture

advantages

  • less moisture gets into the structure via the laying mortar
  • faster installation
  • Construction times are shortened
  • many materials are suitable as a substrate
  • On site, only a low installation height between the base of the paving and the desired upper edge of the finished floor required ( renovation of old buildings )
  • high tensile strength of the tile slabs to the substrate, which ensures a firm fit of the tile in highly stressed areas

disadvantage

high demands on the substrate

  • dry, clean,
  • minimal residual moisture
  • sufficiently stable and level

See also

literature

  • Ernst Ulrich Niemer: Practical manual tiles. Material, planning, construction, processing. Rudolf-Müller-Verlag, Cologne 2003, ISBN 3-481-01921-1 .
  • Gerhard Büchner, Joachim Krause, Karlheinz Stephan: Tiling work. Rudolf-Müller-Verlag, Cologne 1990, ISBN 3-7880-7323-3 .
  • Günter Dinort: Specialized technology with building materials knowledge for tile, slab and mosaic layers. Rudolf-Müller-Verlag, Cologne 2001, ISBN 3-481-01031-1 .
  • Frick, Knöll, Neumann, Weinbrenner: Building Design , Part 1. Teubner, Stuttgart 1992, ISBN 3-519-25250-3 , p. 431, p. 433 f.