Clay fact sheet

Key Facts Clay Building Boards

  • CO₂ emissions: 23.37 kg/m³

  • Specific gravity: 700 kg/m³

  • Fire protection class: A1 according to EN 13501-1; DIN 4102

  • Thermal conductivity: 0. 13 W/m.ºK

Key Facts Clay Plaster

  • CO₂ emissions: 98.62 kg/m³

  • Specific gravity: 900 kg/m³

    • very good thermal insulation

    • diffusible buffers air humidity/sorbs odors, positively influences room climate

    • very good sound insulation (sound insulation index 46 to 50 dB)

    • Durability: 200 years installed without loss of quality - that's real sustainability!

    • Lehm besteht aus Ton, Sand und Schluff verschiedene Korngrössen von > 63 µm/> 2 µm/< 2 µm und entsteht durch natürliche Verwitterung von Primärgestein

    • Due to special structural properties of clay, clay hardens solely by evaporation of water and adheres by mechanical entanglement: binding force does not have to be produced by energy- and CO₂-intensive firing processes

    • Clay is latent heat storage, absorbs heat from a certain point and releases it again

    • Environmental toxins are filtered through clay

    • the raw materials clay and sand are mixed with the addition of water

    • reed mats are used for reinforcement and jute fabric is inserted on both sides (on the upper sides)

    • technical drying takes place after molding

    • Drywall - clay building boards or clay bricks

    • Clay plasters - exterior and interior

    • Clay soils - clay screed and rammed clay soils

    • Ceilings and roof - straw or light clay, clay bricks/fill or clay building boards.

    • Clay walls - non-load bearing and solid

  • simplified per m³ clay building boards (basis: 700 kg/m³)

    • 1 m³ is the equivalent of 50 2 cm x 100 cm x 100 cm clay building boards

    • technical drying is carried out using thermal energy from natural gas. This energy input dominates the life cycle assessment results.

    • Incorporation of CO₂ through photosynthesis during reed and jute growth is taken into account. The incorporated CO₂ is released again at the end of the life cycle, e.g. after thermal treatment or rotting.

    • Manufacturing emissions module A1-3: 23.37 kg CO₂

    • CO₂ capturing: 0.85 kg incl. recycling/credit for net material quantity (reclaimed quantity less processing losses) for substitution of clay powder

    • Degradation of clay causes low impact on environment - reusable through recycling

    • our clay is extracted regionally - short transport distances

    • CO₂ calculation according to ÖKOBAUDAT, in accordance with ISO 14067 & EN 15804+A2

    • DIN 18948 (2018) Clay building boards

    • Schroeder, H.: Clay Building (2019). 'Planning and building ecologically with earth' Wiesbaden: Springer Vieweg Verlag, 3rd ed.'