Abstract
The principles of timber framing for the refurbishment of existing buildings are derived from the classic timber frame construction. The timber frames are usually constructed with sawn timber, gluelam or I-joists with studs in spacing of 625 mm‐833 mm and an interior lining of OSB or plywood and a noncombustible mineral based board as external cladding. The cavities with a depth of up to 300 mm are fully filled with thermal insulation, such as cellulose fiber or mineral wool. Usually a timber-frame element measures about 12, 0 × 3, 2 m 2 , limited by production facilities and transportation. [15] Main field of application are multi-storey buildings, in which the use of timber-based facade products is quite new and fire safety requirements normally suited to non-combustible materials. As curtain wall system the TES-facade shall meet the requirements of an exterior wall, with separation function and those of a facade in addition, with limited flame spread at surface and no propagation of fires inside the elements or between the elements and the existing structure. For using combustible materials as substructure and preferably renewable combustible insulation materials closer examinations of the
Highlights
As modernization of the existing building stock has become an important topic, there is a need for convenient retrofit solutions
The timber-based element system (TES) EnergyFaçade [1] offers a holistic approach based on timber – framed prefabricated façade elements
Beside the requirements on structural aspects, building physics and durability, the fire safety of façade elements and of the entire structure must be considered in the design as well
Summary
As modernization of the existing building stock has become an important topic, there is a need for convenient retrofit solutions. The TES EnergyFaçade [1] offers a holistic approach based on timber – framed prefabricated façade elements. Beside the requirements on structural aspects, building physics and durability, the fire safety of façade elements and of the entire structure must be considered in the design as well. The overall building stock accounts for more than 40 per cent of the primary energy demand of Europe. The more effective way is the retrofitting of the functional deficits of existing buildings in order to prepare them for low energy consumption and new necessities as communication and media connection or HVAC-installation (Heat, Ventilation and Air-Conditioning). The recently developed timber-based element system (TES) façade offers a convenient retrofit method to satisfy this demand (see Fig. 1). Key features are a high level of prefabrication, the use of natural and renewable building materials, and the possibility of adding special extensions or integrating service installations
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