In March 2007 a very beautiful, artifictial waterfall at the office buildings rented to the European Commission could not be put into service seeing as how whan in use, water infiltrated the basement of the buiding. Taking into account the high visibility as well as the degree of finishing (clad in very expensive natural stone), Cibor nv was called upon to localise the defaults in the waterproofing membrane. Thanks to a fast and acurate intervention it was possible to avoid expensive destructive works and to solve the problem without too much hassle.