Introduction How It Works Typical Installations 3D Image Design Service Where Can I See One Vertical Operable Screens Contact Us Home How it works Light Control Light penetration of 89% is achieved with the louvre positioned at optimum setting. Insulation The form of the wing-like section of the louvre incorporates an air gap which provides the Vergola System with it's insulation properties. Controlling the angle of the louvre blades enables the area to be fully shaded as well as comfortably ventilated. Rain Proof Comprehensive tests prove the Vergola System to be rain proof, however with the addition of storm seals further waterproofing will be achieved