Construction.55 2020-09-20by Antony Templier115 Views Written by Antony Templier Extension realized with the GREB technique. Project Data Place:Fresnes Completion:2012-06-30 Construction:Tunnel (GREB technique) with counterfacing mortar Visitable:No Press photos:No Living Area:59m2 U-Value (Wall):W/m2K U-Value (Roof):W/m2K Categories: Projects France, Extension realized with the GREB technique.