Construction.376 2020-09-20by Antony Templier164 Views Written by Antony Templier GREB technique. Project Data Place:Scaër Completion: Construction:Tunnel (GREB technique) with mixed mortar/plate Visitable:No Press photos:No Living Area:190m2 U-Value (Wall):W/m2K U-Value (Roof):W/m2K Categories: Greb Technique, Projects France, GREB technique.