The MHM wall structure
The Massiv-Holz-Mauer® forms the basis of individual and secure solid timber buildings. This building material offers a high-quality and simple alternative to both the conventional wet-build method using brick and concrete and the conventional lightweight timer frame construction method. The wall structure is plain and simple and is adapted to your planning requirements – not the other way round.
The Massiv-Holz-Mauer® wall elements consist of flat softwood boards arranged crosswise and in layers, which are permanently joined together using a special nailing technique. This centuries-old nailing technique allows for extremely fast, rational and efficient manufacture.
» The special nailing technique - DoP
Depending on whether they are used as an inner or outer wall, the wall elements differ with regard to the wall thickness (number of board layers) as well as the lining or insulation. The outer wall forms the thermal envelop. Shaping the surface of the untreated boards with small grooves/profiles creates an air cushion in the finished wall which improves the insulation value over normal solid timber by approx. 20 %. This means that the design of an MHM wall is considerably more efficient than conventional solid timber in terms of equalising summer heat and winter cold.
Thanks to optimal, technical drying, the untreated boards have extremely good dimensional stability and are resistant to pests. The “working” of the boards is also reduced to a minimum by drying the boards and the layered wall structure. Moon phase timber can be omitted with the MHM wall. Nevertheless, if there is still a desire to build with moon phase timber, our manufacturing plants will gladly arrange for this. Simply enquire to your MHM partner.
The structure of an outer wall consists of three zones:
- Massiv-Holz-Mauer® (base wall)
- Inside lining
- External façade
A wall thickness between 20 and 25 centimetres (9 to 11 board layers) can be selected for the base wall for outer walls. Thicker walls with up to 15 layers are also possible.
The » inside lining (e.g. exposed wood, dry construction materials, clay or lime plaster systems) is applied directly on the Massiv-Holz-Mauer®. Only in this way can the inside lining and the underlying wood with its natural absorption capabilities (moisture buffer) and their highly beneficial thermal properties have an optimal impact on the indoor climate. Wall heating can also be installed.
The building services, such as the electrical installation, are installed in individually prefabricated recesses (slots and boreholes) in the wall elements between the inside lining and the MHM wall.
As the developer, you can freely design the external façade according to your wishes and in your preferred style – rural, traditional or simple and architecturally modern.
An additional layer of external insulation, which forms parts of the façade, is chosen according to the required energy standard – whether according to the Building Energy Act (GEG) or as a PlusEnergy energy, KfW efficiency house or passive house.
The plaster façade is applied directly to the insulation material as a mesh filling. Alternatively, very natural appearing wood panelling or other façade cladding can also be mounted on a substructure.
» Further information about the inside lining
» You can find information about the insulation values in the download portal.
The structure of an inner wall consists of three zones:
- Inside lining
- Massiv-Holz-Mauer®
- Inside lining
A wall thickness between 10 and 20 centimetres (5 to 7 board layers) can be selected for the base wall for MHM inner walls. It receives an inside lining on both sides that forms the finished wall surface. The inside lining can be freely designed in the preferred style according to the wishes of the builder (e.g. exposed wood, dry construction materials, clay or lime plaster systems). This layer is generally placed directly on the MHM wall without an installation layer. In this way, the inside lining on the Massiv-Holz-Mauer® and the underlying wood with its natural absorption capabilities can act as a moisture buffer and have an optimal impact on the indoor climate thanks to their positive thermal properties.