It is coming: we know it, we expect it, we see it. It is rising: we feel it, we hear it, we experience it. The rumor that reaches us from the world is saturated. The spatial device proposed for the exhibition « Frontières – Eau » at the Maison de l’Architecture in Geneva shows the course of an irreversible phenomenon. Our initial fascination with the slow color saturation of a massive, archaic object turns into an initial concern: can plaster soak up liquid without damage? Can our walls absorb this troubled water ?