Double glazed facades – a fire technical feasibility study
The purely fire technical problem regarding double glass facades is that the design can involve an increased risk of fire spreading between the storeys if a flame bursts through a glass section in the inner facade and then does not go through the outer facade but breaks the glass in the inner facade on the floor above. In addition, the guidelines given in BBR and in BBRAD are not adapted for this type of construction, which may mean that the design is treated differently from project to project. This is because the solution is relatively new in Sweden, which has meant that the building regulations have not yet been adapted to the concept. However, it can be stated that the risk picture in a building is undeniably affected by a double-glazed façade. A number of experimental studies with double-glazed facade systems have been carried out, but general conclusions are difficult to draw as the designs have been different and the documentation is not complete. The impact of wind from the outside has also not been studied.