Light clay

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Example use of light clay within a timber frame before rendering Light clay infill.JPG
Example use of light clay within a timber frame before rendering

Light clay (also light straw clay, light clay straw, slipstraw) is a natural building material used to infill between a wooden frame in a timber framed building using a combination of clay and straw, woodchips or some other lighter material.

Contents

History

A mixture of clay and straw was used as an infill material for timber framed building from at least the 12th century in Germany and elsewhere in Europe. [1] Renewed interest in traditional building methods developed from the 1980s after which various natural building architects and builders started promoting the use of light clay. [2]

Usage

Light clay mixture consisting of clay, water and straw before application Light clay mix.JPG
Light clay mixture consisting of clay, water and straw before application

Local clay, often local subsoil, is mixed into a slurry with water and then combined with straw or wood chip or other similar material. Wood chips can vary in size from sawdust to 5 cm in diameter. [2] The ratio of clay to other ingredients can be adapted to either increase thermal mass or insulation properties. [3] The mixture is provided with additional structural strength using wattles. When used externally it can be protected with a Lime render or a clay render. [4]

See also

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References

  1. "An Introduction to Traditional and Modern German Clay Building". Building with clay has a long tradition in Germany and other European countries. Framed structures (half-timbered houses) from the 12th century, filled with a mixture of clay and straw fibers, still exist.
  2. 1 2 Kennedy, Joseph F.; Wanek, Catherine; Smith, Michael G. (2002). The art of natural building: design, construction, resources. pp. 165–170. ISBN   978-0-86571-433-5.
  3. Chiras, Daniel D. (2000). The natural house: a complete guide to healthy, energy-efficient. p. 250. ISBN   978-1-890132-57-6.
  4. "Earth in non-loadbearing walls".