Rammed earth foundations
• Rammed earth foundations are made of well graded soil, preferably wig a stabiliser for water resistance and higher strength.
• The site must be well drained and great care is needed to protect the foundation from ground moisture, especially with a plastic foil or bitumen felt. Bitumen paint, or a facing of rubble stone or burnt bricks are alternatives.
• When in doubt about suitability of rammed earth foundations, they should not be used. Stabilized soil blocks can be used instead, but similar protective measures are necessary.
• Wherever possible, the earth foundation should be placed on a concrete footing.
• The foundation is made in formwork, in the same way as the walls: layers of 10 cm soil are tamped down to 6 - 7 cm, before the next layer is filled up.
Further information: Bibl. 02.06, 02.08, 02.19, 02.32, 20.05.
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