This barn, still covered in "laves", is the last witness to a practice that was widespread in the Montagne de Langres before 1880, and which has since been replaced by mechanical roof tiles. The main quality of stone is its resistance: it is said to be made to last 100 years. Its main constraint is the construction of a framework strong enough to support its heavy weight. The load could reach 300kg/m², which explains the magnificent oak frames on most houses and roofs. The word "lave" comes from the word "levé", pronounced "lave" in the local dialect, a term used by stonemasons: the flat limestone had to be lifted ("laver la pierre") to be split through its thickness with a skilful chisel to make roofing stones.
Grange couverte en lave à Orcevaux