if you have time on your hands, they are easy to D.I.Y buy rubber seal and fly screen from one stop or tower electrical and pull out old rubber, throw away old net. lay net on top of frame and start in corner pushing rubber seal on with flat blade, I used old flat thin edge wooden spatula from kitchen. keep net fairly tight and rubber slightly stretched as you go round. cut off excess and finished! lots of video's on you tube. less than €10 for patio size. first one took about 30 mins until I got the hang of it.
