Construction.800 2020-09-20by Antony Templier140 Views Construction.800 Written by Antony Templier Build my own house with maximum thermal efficiency and good inertia for maximum comfort. Project Data Place:Millau Completion: Construction:Tunnel (GREB technique) with counterfacing mortar Visitable:No Press photos:No Living Area:65m2 U-Value (Wall):W/m2K U-Value (Roof):W/m2K Categories: Projects France, Build my own house with maximum thermal efficiency and good inertia for maximum comfort.