Weller (building material)
Weller or Wellerholz is a regional name for a mixture of straw and loam in general or loam in particular.
When building clay corrugations , the straw-clay mixture is processed into a solid clay wall. In contrast to a rammed earth wall , however, no formwork is used, but the wall is freely piled up and shaped by later parting with a spade.
Lehmwickel made of rough-hewn timbers Punting, Stakhölzer or billets are called. They are rolled up in a layer of straw clay , which was made by kneading the longest and previously soaked straw into soft clay .
For the production of clay wrap-around ceilings, the stakes were brought to a uniform width by sharpening the ends so that, after being wrapped, they could be pushed into grooves that were carved into the side of the ceiling joists. Today they are usually placed on strips that are attached to the side of the ceiling beams. The pegs are pushed close together so that the billets and clay combine to form a tight layer.
Before the clay dries, smooth it out with a trowel. After drying, the ceiling soffit was usually provided with a clay or lime finish to smooth out drying cracks and protruding straws. The airtight spread and the mass of the straw-loam mixture results in a ceiling that is heavy enough to dampen structure-borne noise to some extent and air- borne noise sufficiently.
Corrugated wood is also used instead of wickerwork to fill the compartments of half-timbered walls. Depending on the thickness of the construction, a wall filled with clay pegs can almost reach the mass of a solid brick wall. See also: Klaiben
Web links
- Description and images of clay wraps on www.Holzfragen.de
- Studies on the landscape and settlement history in the southern North Sea area 3 (accessed on August 6, 2020)