Pleasant surroundings in a solid timber house

The MHM wall is made of dried wood and exhibits excellent thermoregulating properties thanks to its sophisticated structure. The interior finishing can largely be carried out in a dry state. Unlike conventional solid constructions, no drying times are required and a dry and cosy living atmosphere is perceptible in the building right from the start. Additionally, the vapour-permeable construction and the warm inner surfaces due to the positive insulating properties of the MHM sustainably contribute to a moisture management that is optimal for your health and the building material.

The inside lining is applied directly on the Massiv-Holz-Mauer®. The inside lining and the underlying MHM wall can thus have an optimal impact on the indoor climate. The MHM wall is flexible in terms of the choice of inside lining; wide-ranging solutions with dry construction materials, exposed wood surfaces or a plaster design can be realised.

Dry construction materials
Surfaces made of gypsum fibre and gypsum plasterboard can easily be designed with customised colours and structures.

Exposed wood surfaces
Exposed wood surfaces are produced ex works by the MHM manufacturer or in the course of the interior finishing. Popular types of wood are spruce and Swiss pine. Exposed wall surfaces have several advantages that clearly differentiate them from other materials. These include cosiness, feel and surface quality, antistatic properties and scent. Due to its porosity, density and elasticity, the wood surface is perceived as “soft”. In combination with the underlying MHM wall, these features generally result in a positive perception.
» Interior views

Plaster surface
The MHM wall is supplemented by a support plate made of reed matting, wood wool panels or gypsum materials, for example. The desired kind of plaster – such as a loam, clay or lime plaster system – is then applied on top.

The Massiv-Holz-Mauer® is characterised by a high insulation value, which keeps you warm in the winter and cool in the summer. The combination of the special wall structure, the large mass of grooved softwood boards and the external insulation results in a low thermal conductivity that allows only a limited amount of heat to pass through. In this way, the MHM system keeps the indoor temperature constant for a very long time, even with large temperature fluctuations outside the building.

For an optimal wall construction, only a small amount of additional external insulation – which is matched to the energy efficiency class – is needed. The grooved boards of the Massiv-Holz-Mauer® create layers of air which improve the insulation value over solid timber by approx. 20 %. Using the onion skin principle, the arrangement of board layers on top of each another also produces a significantly better insulation value than with other conventional monolithic construction systems.

The MHM construction system impresses with very good sound values – whether internal or external noise. The good noise insulation is achieved through the high basic mass of the Massiv-Holz-Mauer® and through the layered, nailed and therefore dampening structure.

The MHM construction concept range also includes advanced solutions to meet all noise protection needs: for effective noise protection within the home or partition walls between residential units to protect your privacy. We also offer specially developed and tested wall constructions which allow for a combination of noise and fire protection.

No extensive internal foils or vapour control layers are needed for the MHM outer wall. The diffusion values of the MHM wall are largely determined by the timber of the Massiv-Holz-Mauer®, which is nailed in a cross-layered arrangement. The inside lining and the façade system on the MHM wall have only a minimal impact on the diffusion – the MHM wall construction is thus diffusible to the outside and inside. This allows for a cyclical moisture behaviour in the MHM wall. Consequently, remoistening takes place in the summer months, followed by a more pronounced drying phase in the winter months.

The resulting decline in wood moisture content reduces the thermal conductivity of the MHM wall, thus improving its insulating properties. The partial remoistening of the MHM wall in the summer reduces its thermal conductivity, the ratio between heat storage and heat conduction. This raises the phase shift and thus results in increased thermal insulation in the area of the outer wall in summer.

Thanks to its long-term and annually cyclical moisture behaviour, the MHM wall makes a significant contribution to the energy efficiency and pleasant interior climate of the building. This is undoubtedly another reason why owners of MHM buildings are happy to recommend the MHM construction concept.

If the living conditions of the occupants change, you can continue to adapt to them flexibly even years later with Massiv-Holz-Mauer® elements. For example, an additional door can be added with little effort. That isn’t quite so simple with construction methods that mostly consist of insulation material. With the MHM concept, buildings can also have an extension added to them at a later date that can be adapted perfectly to the existing building. This enormous flexibility guarantees you a high degree of intrinsic value.

The Massiv-Holz-Mauer® elements can be directly released for recycling at the end of their life cycle. For example, MHM elements can serve future generations as a CO₂-neutral supply of energy in the form of wood chips for thermal utilisation. The profiled nails that are used to connect the board layers reappear during thermal utilisation and can be processed into new nails in the recycling loop. In view of the growing take-back obligations for all kinds of products, this is becoming increasingly important and is a good example of a genuine circular economy.

Anyone who wishes to erect a building made completely out of solid timber can benefit from using Profiled Timber Elements (PHE) for the roof and ceiling structures. They have the same positive material properties as the Massiv-Holz-Mauer® elements and have a similarly pleasant impact on life and work in the building.

If appropriately tailored to the MHM wall, ceiling elements made of solid timber provide good footfall and airborne noise protection. As a roof element, PHE exhibits good thermal properties similar to MHM.

Using solid timber also makes it possible to produce roof and ceiling elements with a high-quality visual appearance. As a result, the ceiling is already in a finished, elegant state after installation, with no need for any further work. Not only does the visually appealing exposed wood surface have architectural benefits, it can also improve the room acoustics thanks to its special grooves.

» PHE elements for roofs and ceilings