Compressed Earth Blocks

Health

Earth regulates the climate in the house naturally. The compressed earth blocks are not fired so that the unique moisture-regulating and heat-accumulating properties are preserved. The wall absorbs moisture in wet weather and gives it back when the air is dry. The bulk of the compressed earth blocks means that an earth wall can storeheat well and give it off again so that temperature fluctuations are fewer. Earth emits no hazardous gasses or substances into the interior atmosphere and in addition neutralises cigarette smoke for example. The constant relative humidity of approx. 50% in an earth interior climate prevents fungus forming. That is why an earth house is a

The production process

The compressed earth blocks are produced by a mobile compressing machine, which is capable of producing blocks for larger projects on site as long as the building ground is of good quality. The fertile top soil is temporarily moved aside, the clay-retaining underlayer is dried by the sun and wind and then pulverised. It is then moistened and mixed with sand depending on the proportion of clay in the earth. The compressing machine now makes uniform earth blocks from this mixture which will be ready to be used after a few weeks of drying.

Sustainability and the environment

In many places in the earth (clay, silt, sand) is present in its natural form 20 to 30cm under the fertile top layer and can sometimes be extracted locally. Earth can also be dug out of the building excavations or can be a by-product of road and waterway projects. The properties of earth do not change during the production of the compressed earth blocks, so that it can be used again without limit as long as earth is used as the mortar and any plastering is done with earth and/or painted with a natural breathing paint. The compressed earth blocks need not be processed before being returned to the ecological system.

Energy

Producing compressed earth blocks requires about 1% of the energy needed to produce a building brick. Only 1 litre of diesel is needed to produce 145 earth blocks, making it an energy-saving production process with minimum CO2 emissions. Less energy will be needed for heating due to the almost constant relative humidity of approx 50% in an earth house in comparison to a more traditionally built house where the relative humidity can reach 80% or more. Energy is saved because a solid earth wall can store heat and solar energy and emit it in the form of radiated heat when the temperature drops. A large accumulation capacity can be created (if necessary by using the outer gable insulation) with a compressed earth block wall, so that the house is warm in the winter and cool in the summer.

Applicability, design

New build and renovation. Load-bearing and non load-bearing walls. Accumulating walls. Heat walls. Finnovens. Design. Bricklaying with earth mortar.

Electricity, magnetism and radiation

Earth cannot be charged with static electricity, neutralises earth and cosmic radiation, mobile and DECT radiation, is not influenced by static magnetic fields and is insensitive to electromagnetic fields. The Netherlands Institute for Construction Biology and Ecology (NIBE) considers compressed earth blocks to be a good product choice from an environmental and health point of view.

Compressed earth blocks

Dimensions Density
295 x 140 x 70 mm 2000-2200 kg/m³