This invention provides a new wall arrangement in panels composed of glass wool and fire resistant thermal and acoustical insulating material, adequate for any kind of land and weather condition, to create a habitable environment that may be utilized in many applications such as houses, attendance stations, schools, first aid stations, motels and others. The objective of this invention is to present the conception of a modular wall which comprises a structure composed of a sheet of glass wool, with a wooden frame core and the upper part designed to support cabinets, exhaust fans, and other utensils, offering good mechanical resistance, and receiving in the interior of the hollow areas of the wooden frame, a layer of expanded polystyrene, with grooves to receive the ribs of rock wool. To complete its composition, the structure also has rock wool internal panels, wooden frame with the upper area, a new layer of expanded polystyrene, and completing the assembly a plate of glass wool is added.