4mm Twin-Wall Polycarbonate

4mm clear polycarbonate sheets (twin-wall); are ideal for use as greenhouse glazing. Upgrading to these replacement panels offers you better insulation than greenhouse glass, they are safer, and offer you better value. Polycarbonate panels give your plants a level of protection against very cold weather and will help you save on costs if your greenhouse is to be low level heated. We recommend that the open ends at the top and bottom of each greenhouse polycarbonate sheet are sealed using vent and aluminium tapes to prevent insects and algae from invading the interior. Specification: Weight: 0.8 kg/sqm Insulation U value: 3.9 Light Transmission: Clear = 85%