Where to Use Domestic and Industrial Roofs, Balconies, Lightwells, Underside of Canopies. Product Specification 75mm Mesh for proofing against Seagulls. Available in Black & translucent. UV Stabilised Knotted Polythethylene. Stock sizes include 5m x 5m, 5m x 10m, 10m x 10m, 20m x 20m. Custom size nets available for 35p/sqm, product code - 75MMCTS. How to Install Create a frame work out of wire rope and attach the netting to it. Ensure the netting is not saggy or birds will become trapped in the netting.