Glass/Aluminium 'Ridge Lights' System A full aluminium system that is thermally broken with polyamide breaks. This unit will suit an overall external finished waterproofed kerb and are set to a standard 25 degree pitch but we can offer between 17 to 35 degrees too. A 40mm rafter & ridge width and 70mm (up to 100mm) rafter & ridge depths, depending on the size of the product. Flat or moulded external caps. Our price includes for STANDARD RAL 9910 White. Other RAL colours are available but will increase the cost & lead times. Dual RAL colour combinations available. The Glass Specification is Double glazed 24mm consisting of a 4mm Neutral or Blue Activ Self Cleaning Toughened Glass, 16mm Gas filled cavity, 4mm Clear HST Toughened Glass including LOW E coating with Warm edge. U Values: Double glazing is 1.1 W/mk (0.9 W/mk available on request). Roof vent options in either manual (with opening pole) or electric (with switch). The product is delivered in a kit form for ease of storeage, handling & installation with all roof parts cut to size and numbered.