Why build with clay?
People have been using clay as a building material for thousands of years. To this day, it creates comfortable living spaces as an ecological building material.
It is becoming more and more a matter of course to ensure that the home environment is also designed to be natural. This is important for well-being, because people are staying more and more in enclosed spaces. The designed environment has more and more influence on people. With its many positive properties, clay gives our living spaces a climate in which we feel comfortable.
Vorteile der Lehmbeschichtung
Clay plaster actively regulates the room climate
Durch die Fähigkeit, Feuchtigkeit aus der Raumluft aufzunehmen und wieder an sie abzugeben, kann Lehm Feuchteschwankungen der Raumluft puffern.
Lehm und Raumluft
With the moisture, clay also stores odors and pollutants. It breaks them down and ties them in firmly. One gram of clay minerals has a surface area of about 800 m².
Clay preserves wood
The equilibrium moisture content of the loam is so low that it always removes moisture from the wood. A perfect protection for the wood from pests or fungi.
Die Primärenergie eines tragenden Lehmputzes ist nahezu Null
Die Herstellung erdfeuchten Lehms ist sehr einfach und bedarf nur
weniger Energie, die Graue Energie (Primärenergie) von Lehmbaustoffen
ist gering. Transportenergie lässt sich wegen des häufigen Vorkommens
noch einsparen.
Clay is a natural product
Clay does not need any chemical additives and is therefore ideally suited for people with allergies and people suffering from MCS.
Lehm kann immer wieder verwendet werden
Der geringe Primärenergieaufwand lässt sich noch verbessern durch seine mehrfache Verwendung. Lehm bindet nicht chemisch ab und wird mit Wasser vermischt wieder zu neuem Baustoff.
Lehm bereitet Freude beim Verarbeiten und Leben
The use of clay is stimulating and inspiring for the mind, and living in clay rooms is calming and relaxing.
Clay can be stored indefinitely
Lehm ist Jahrtausende alt und lagert schon ewig in der Natur. Lehm kann
noch über Jahrhunderte gelagert werden, ohne zu verderben.
Lehmputz verfügt über hervorragende Wärmeübertragungseigenschaften
Lehm in Kombination mit einer Wandheizung ist enorm effektiv in der
Übertragung der Wärme. Verglichen mit Kalk braucht man für die gleiche
Wärmemenge nur die Hälfte an verbautem Heizungsrohr.
Handverarbeitung von Lehmputz
Earth building is relatively easy to learn. Fortunately, you start every clay wall or ceiling with a concealed plaster. This plaster layer is ideal for practicing and making first experiences with earth building.
In old clay houses, the clay walls and ceilings that we want to work on are usually so uneven that the first thing to do is to fill in the rough unevenness and holes in the substrate with clay plaster or universal plaster. A homogeneous layer is then created on the wall with the classic clay concealed plaster. It can be processed or applied both by hand and with clay plastering machines. Good tools made of steel are helpful for applying by hand, but also for the following smoothing and compacting work.
Three-layer clay plaster
A good clay plaster always consists of three layers. The first layer is a concealed installation. It is applied to stable and otherwise suitable substrates. It should compensate for unevenness, with it the necessary layer thickness is achieved.
In most cases, a fabric layer is embedded in the second layer. These reinforcement fabrics consist of either jute, plastic or glass fiber. Clay plaster on masonry made of mixed bricks, on reed plaster bases, on half-timbered walls, on bales of straw and on panel materials such as soft wood fiber boards or OSB panels with reeds absolutely need the fabric. The jute fabric - strengthened without plastic - is the ecological alternative to synthetically manufactured products, but requires a little more experience.
A concealed plaster is usually used for the first two layers. When plastering panel material, the first flush-mounted layer can be dispensed with. A layer of fabric can be applied directly to this with clay adhesive and reinforcement mortar.
Kompletter Lehmputz
After the clay base plaster has dried, the finishing plaster is applied. Depending on your personal taste and preference, this can be a fine plaster, a high-quality plaster or a clay finishing plaster. A finishing plaster should be rubbed off, this compacts the structure and the plaster becomes stronger. After a cleanly executed job, there is no sanding.
If a finishing plaster is processed with the sponge board, the use of two different sponge boards is recommended. On the first day you work with a very fine sponge board, after it has dried you go over the surface again the next day with a coarse sponge board and wash off the sand lying on the surface. The subsurface is once again slightly compacted and nicely stable.
The last layer of plaster can now be painted or finely finished. One possibility is surface treatment with a clay spatula. These fine-grain earth building materials can be sanded, with a little practice you can achieve surfaces in Q4 quality.
Lehmputz maschinell verarbeiten
From a certain size of the area to be processed, the use of a plastering machine is worthwhile.From a certain size of the area to be processed, the use of a plastering machine is worthwhile.
From a certain size of the area to be processed, the use of a plastering machine is worthwhile.
-
Time saving
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energy-saving work
The greater "soiling" of the construction site, the increased effort involved in masking the adjacent areas and the greater logistical effort pay off quickly with larger amounts of clay. In addition to the large plastering machines, which can go so far in their functionality that they mix, convey and apply, there are of course also more modest devices, such as mixers and agitators.
