The façade of the main body of the swimming pools employs solar control windows at the bottom along with a double-skin of orange cellular polycarbonate panels that allow for the incorporation of an adequate transmission factor and, at the same time, avoid excessive heating of the interior, minimizing the energy consumption required to ensure ideal humidity and temperature conditions in the pool area as a whole. The roof design consists of a structure of large 30-metre laminated wooden beam, supporting a light sandwich type roof that, due to its composition, guarantees the required level of thermal insulation. The large scale work of building the new inside swimming pools also includes the major transformation of the part of the building currently occupied by the changing rooms, gymnasium and access to the stands, etc.