3 of the building the permanent retractable wall enclosures 18 defines a working space 72 peripheral to the construction zone 3 and the building 34 in order to provide more space for the construction work to occur this space being larger than the construction zone 3 it also allows easier assembly of the building envelope components 45 and 46 the working space 72 is supplied by a peripheral material handling mean 71 comprising a linear support mean that can carry multiple types of trolleys trays bins and other material handling devices not shown the permanent retractable wall enclosure 18 can be self motorized or anchored on the last floor 34 and extend or retract following the movement of the permanent roof structure 1 driven by the extensible load support means 6 the permanent retractable wall enclosure comprises a wall either constructed with articulated rigid panels such as shown in fig1 or accumulating like an accordion or a membrane 20 accumulating on a drum 21 the membrane 20 is made of resistant material and can be multi layer when required at the base of the permanent retractable wall enclosure 18 and 20 is a rigid platform 19 accessible to workers the rigid platform 19 is safely attached to the building by a positive fixation means 22 the permanent retractable wall enclosures 18 and 20 can be equipped with windows to provide natural lighting to the construction zone 3 the temporary wall enclosure as shown in fig1 b shields the construction zone 3 similarly to the permanent wall enclosure 18 but it can be removed once the building has reached its final elevation the temporary wall.