Building joints are indispensable for large-scale construction projects. Movement caused by temperature changes, wind forces or even earthquakes needs to be compensated for by joint covers in order to protect people and buildings. WSP1 is a system that hides such joints using a freely designable aluminium composite panel whose fastenings are hidden and which is much less visible than other solutions to date. The result: almost invisible joints, which, alternatively, can be consciously used as design elements.