Pipes fixed ready for the bath, shower, WC's etc to go under the concrete slab. At this point at the end of the week, Faye's gang left. Francis Guinot asked me for detailed drawings of the external basement walls which were going to be in 'monomur' blocks (briques). These are 37,5 cm thick perforated fired clay bricks with 21 cavities which are load bearing and insulation in one. They slot together like 'Lego' with glued joints applied by roller, and the openings and angles of the walls have to be designed to the modules of the monomur.