translate English to French: In terms of the protection afforded to the stones that have been gilded, which are, as stated previously, the most exposed, the gilding has a life span of around thirty years, which is three to six times longer than the effectiveness of a waterproofing treatment [Fig.
Vis-à-vis de la protection des pierres concernées qui sont, répétons-le, les plus exposées, sa durabilité est de l'ordre d'une trentaine d'années, soit trois à six fois celle de l'efficacité d'un hydrofuge [fig.