The forester and ecology expert Erwin Thoma founded his own timber construction company accompanied by the traditional wood knowledge of his grandfather.
The outer wall of the entrance side is indented by half an axis, so that on this side the entrance to the central opening is located inside the cube itself.
The building is accessed from the north. From the ground to the third floor, there are two apartments on each level.
The building has a basement floor with a pillar foundation, topped by five full storeys on a square layout, with an edge length of 15.10 metres. The cube is divided into three horizontal axes, whereby the dimensions of the centrally oriented staircase with its lift shaft define the dimensions of the respective central axes. The staircase core is also square.
Due to its carbon balance in construction and operation, the “WOODCUBE” demonstrates the potential, within the climate-neutral building sector, of solid wood construction and energy supply using renewable forms of energy.
A sophisticated building services concept with central building control and smart metering supports the consistently low energy consumption.
Compared with conventional buildings, approximately 8,500 tonnes of carbon were saved during the construction phase alone.
The “WOODCUBE” project is the first time that a apartment complex has been built that does not emit any greenhouse gases over its life cycle, and is almost completely biologically recyclable. All of the construction materials were therefore checked for their carbon potential and biological compatibility in building.
The “WOODCUBE” is a five-storey apartment building with a flexible number of apartments. The design demonstrates the possibilities of forward-looking solid timber construction: the Efficiency House 40 largely avoids the use of non-renewable raw materials in both its construction and its operation. Energy and heat energy are carbon neutral and derived from renewable sources.
• The floor plan typology allows for different types of occupation, adapted to urban living requirements.
• The use of renewable building materials results in a structure that is carbon neutral in terms of its construction and operation.
• Multistory solid timber construction.
After this short introduction the “WOODCUBE Smart Material House” will be presented in brief, and then explained in detail. The architectural and building services concept will then be described, followed by the planning process. Finally, the model project will be assessed. The focus throughout is on the “WOODCUBE’s” energy concept, the flexible roof, and the wooden construction.
The reasons behind these changes were technical, financial, or functional, meaning that some original targets had to be adjusted.
Model projects are particularly liable to undergo planning changes; indeed, besides presenting innovative end products, building exhibitions also seek to test out construction methods and processes.
• There is an emphasis on the “aesthetics of phenomena”, which mainly focuses on the behaviour of materials. It is not important how the material presents itself, but when it makes its appearance.
The architectural and building services concepts behind the “WOODCUBE” are set out in detail in this White Paper. The planning process is also outlined clearly, as a large number of alterations were made between the design stage and the final execution of the project.
Along with the increasing importance of time processes, an “open layout” can be changed into a “reconfigurable layout”. Reconfigurable layouts are generated from the mutability of the space, the transformability of the materials, and the adaptability of the technologies, no longer solely through their (static) openness to different uses.
• The new technologies make it possible to multiply building services and distribute them to various surfaces. Materials become dynamic infrastructures that can produce variable, partly contradictory effects.
• With the extension of multifunctional surfaces, the time factor becomes an integral part of the design and simultaneously makes it possible to use space and buildings in hybrid ways.
• Since the beginning of the modern period, building services have been bundled away, centralised, and thus often rendered invisible. With the proliferation of smart materials, the material surface can itself become a medium carrying energy and information.
Accordingly, it performs additional functions, such as being a “power plant”, providing “energy storage”, or comprising a “communications point” in the urban context.
• The building envelope is the central element of the energy exchange between inside and outside. It controls inflowing and outflowing energy streams and the circulation of material. Using smart materials and smart technologies, building envelopes can actively regulate energy and material flows.
Arguments for rough sawn siding, external cladding:
- Less expensive, because all the dressing procedure falls away
- Less use of wood
- Optical reasons and tastes.
- The right time of harvesting
- Natural drying and proper storage
- Using constructive ways of working with wood
- Making sure the wood stays dry
One opinion is that rough sawn wood is more favourable for insects to lay egs on, compared to dressed wood.
Adequate protection from insects is mainly achieved by:
- The right choice of wood type and mature tree
Arguments for a dressed surface:
- Water runs off better when the surface is smooth and Wood dries faster.
- The area where hands come into contact with wood (external cladding on ground level, balconies) is safer when dressed because there is no splintering.
- In case it will be painted, dressed wood needs less paint.
- Optical reasons and taste.
Rough Sawn or Dressed?
This question often comes up in the context of UV protection and weathering:
"Should wooden surfaces outdoors be dressed or stay rough sawn?"
If you cannot see yourself happy with natural colouration caused by the sun and you still want to paint it, avoid using paints which harm you and the environment. There are quality natural paints available and you recognize trustworthy natural paint manufacturers by their willingness to provide a listing with all the paint ingredients.
Before you consider painting, ask yourself this question: "Did I consider the overall costs for work, material and the continuous upkeep?" When building properly and omitting construction mistakes, you will save all these costs. However, buildings which have been designed and built poorly cannot be maintained for long with or without more paint.
Holz100 Canada Inc.