The greenhouse screening is situated inside the glass and is formed as a thin film. It is made up symmetrically about the centre line, in two parts, the upper screen (6), which can be used on its own, and the side screens (54). The two parts of the screen are supported by the parallel layers of rope (12 and 55). The ropes are arranged and held along the length of the greenhouse or tunnel. The screens are rectangular in shape, with the longer sides running parallel to the ropes. At least one of the longer sides of the screens are linked to the extreme side ropes (24 or 65), by a loop attachment (23), which can slide along its rope. USE/ADVANTAGE - It provides an alternative solution, which is less costly and easily installed to provide good protection and draining for the condensation.