2. A few special cases

Occasionally, technicians are left baffled as to the causes of the damage they observe. With further investigation, surveys and questions about the circumstances in which the studies and work were carried out, as well as a little luck, it is sometimes possible to pinpoint the origin of the damage.

• Here are a few examples.

  Examples

  • In a recently completed block of apartments, a faint reddish streak appeared at the top of the wall cladding in one of the apartment's bedrooms, a disorder which, at first, attracted little attention. But as its surface area grew to become a veritable halo some fifteen centimetres in diameter, the phenomenon began to intrigue the technicians concerned, who lost themselves in the most diverse conjectures,...