The primary energy of a clay plaster is close to zero

The production of earth-moist clay is very simple and requires only less energy, the gray energy (primary energy) of earth building materials is low. Transport energy can still be saved because of its frequent occurrence.


Clay is a finished product. To put it briefly and simply: after it has been wrested from the earth, it is made supple with water and mixed with sand, and is immediately ready for use. In contrast to modern building materials, it does not require a hundred energy-intensive work steps to become a usable building material. No chemical synthesis, no remuneration, no material metamorphosis - hardly imaginable in today's times of systematically indoctrinated construction marketization: the dictates of modernity have left their unfortunate mark in the construction industry more than clearly in the last seven decades. The following applies there: only building materials manufactured in a complex and expensive manner, preferably chemical ones, are any good. And they are cheap too - at least in terms of the purchase price. The real price, namely that of energy and raw material-intensive production and disposal, is borne by neither construction companies nor house builders. 
Fortunately, a rethinking is taking place everywhere, with people returning to the common sense of simplicity, and clay is simple:
  •  It occurs everywhere in nature. A small clay pit in your own garden is sometimes sufficient for your own house. Transport energy: almost zero. Plus a little extra fitness.
  • A clay plaster does not require long and laborious preparation. Mix the raw material with sand and water. Finished. If necessary, it works completely without electricity.
  • The production of building elements from clay is surprisingly easy. The clay must be mixed with the other raw materials, such as aggregates, and shaped. The only factor that could possibly be added to the so-called gray energy is that which is used for transport and drying. However, there is usually enough time and storage space for drying.