Construction.52 2020-09-20by Antony Templier122 Views Written by Antony Templier Self-construction in GREB. Project Data Place:Yenne Completion: Construction:Tunnel (GREB technique) with counterfacing mortar Visitable:No Press photos:No Living Area:140m2 U-Value (Wall):W/m2K U-Value (Roof):W/m2K Categories: Projects France, Self-construction in GREB.