Taffonisation shapes up Corsica's magnificent landscapes, but it is also responsible for the degradation of our heritage. The menhir statues, evidence of the Bronze Age, are a case in point. Understanding the mechanisms behind this very particular type of erosion should enable us to protect our monuments more effectively. Our study focused on the influence of freeze/thaw and the action of salts in a damp environment. We also conducted experiments to quantify the pressures generated when water freezes. Then, in collaboration with the IRPA laboratory (Institut Royal du Patrimoine Artistique, Royal Institute of cultural heritage) we looked at the mechanisms by which salt is added and its influence on this degradation.