Self Cleaning Glass Warm Edge Spacer Using a new generation of 'photo catalytic' self cleaning glasses, SMARTGLASS^TM  is able to offer the ultimate in low maintenance technology. Every roof comes with an invisible dual action coating to the outer face, which first acts by using the ultraviolet energy in ordinary daylight to break down organic dirt. Secondly, rather than forming droplets, as the picture shows, water 'sheets' down the glass, carrying the dirt away with it. But does it really work? Well, self cleaning glass uses daylight and water to power its chemical and physical reaction, the sun providing the light and the rain providing the water. Given these conditions, yes it does really work!  Have you ever noticed condensation at the edges of your window frames, even though you thought you had bought energy efficient glazing? That's because no matter how efficient the sealed unit may be at the centre, the metallic spacer bar at the edges acts as a bridge, allowing cold to pass through.  80% of the energy lost though a window occurs here for this reason. To eliminate this, SMARTGLASS^TM uses warm edge technology - the spacer bar we use is up to 950 times less conductive than aluminium, increasing internal temperatures and eliminating condensation. ALUMINIMUM SPACER WARM EDGE SPACER NORMAL GLASS SMARTGLASS^TM