Melissa and Julian Baas started the construction of their single-family house in June 2021, an ecological timber construction and an efficiency house of the KfW 40 Plus standard. The construction of the new building is an ecological timber frame, insulated with cellulose. From the outside, the wooden facade made of larch wood was lined with clay blocks (green clay). Inside, light clay blocks were used, which were then plastered with the clay undercoat plaster with straw. The glassfibre mesh was used as the reinforcement fabric, this is particularly tensile, yet very fine and easy to work with. Both the YOSIMA clay designer plaster and the clay finishing plaster coarse with straw were used as surface finishes. In this way, modern, light surfaces were partially combined with natural, coarse-textured surfaces. On the ceilings, the clay adhesive and reinforcing mortar was applied to flax mesh insulation boards. The glass fabric was used as the mesh here as well. The ceilings were designed brightly with one of the Classic shades from the YOSIMA range.
Building with wood has long been relevant in terms of design and ecology. For a balanced indoor climate in timber construction, the building material loam is used as a mass reservoir. In the lightweight structure of wood, loam ensures that cold, heat and moisture are optimally regulated. Sound and fire protection also play a special role in wooden houses. Here, clay can provide a remedy.
The young couple carried out the clay work themselves during the 15-month construction phase. Thus, uncomplicated processing played a decisive role in the choice of the right building material. Without any prior knowledge, the inexperienced owner wanted to carry out the work in their future home on their own. Loam building materials are ideally suited for application on one's own, loam as a natural product allows corrections of imperfections or rework without any problems, moreover the already mixed material can be stored for several days and thus forgives delays on the construction site. In addition to the simple and convenient processing, the young couple decided in favor of earthen building materials primarily because of their optimal structural-physical properties. The heat-storing properties ensure a pleasant and balanced indoor climate at any time of year. Clay building materials work as thermal stores, warming the interior at low and cooling it at high outside temperatures. The ecological, pollutant-free building material creates diffusion-open, breathable surfaces that absorb both heat and humidity, and then release both again evenly.
Craftsman's workshop: Own work by the client
Photos: Melissa Baas