These glass types feature dual-action, self-cleaning properties with solar control performance for a cooler internal environment. Climate Roof Glass from Finest groupKeeping your conservatory cooler in the summer is integral to the enjoyment you get out of your new living space. Activ- glass helps keep internal temperatures cooler whilst still maintaining light transmittance. A photocatalytic process is used on the coating of our Eco-Lite Activ- Clear which reacts with ultra-violet rays present in natural daylight to break down and disintegrate organic dirt.