Strengur is the top 5 cm of the grass turf and is considered the best part. It is cut into large pieces that are laid in courses on the foundation walls. Knaus is from deeper levels and is of a lower quality. These are smaller pieces of turf, approximately 12.5 cm thick, which are laid according to the 'Klombruknaus' method (see Figure 13.53).
A problem with turf walls is the dangerof them 'slipping out'.This can be reduced by stiffening the corners with stone or short timberdowels which can be rammed through the layers asthe building progresses.
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