Abstract: A louvre screen or blind comprising a number of blades located in side by side parallel relationship extending between two spaced apart framework members. The louvre blades are mounted so as to be capable of pivoting about their respective lengthwise extending axes by a fixed fastening means at their collective one ends and fastening means with selectively adjustable tension at the collective other ends. The selectively adjustable tension fastening means and the fixed fastening means co-operating to maintain the blades in tension so that the blades are capable of resisting deformation of the blades from their parallel position in use.