A flat roof window with a sleek and modern design. The Skylux iWindow2 flat roof window excells in insulation (Ug-value of 1.0 W/m²K) thanks to the compact, insulating PVC frame and the super insulating safety glass HR++. You save up to 63 % of energy compared to with a classic double-walled plastic skylight. Enjoy maximum daylight thanks to our largest available size of 1 by 3 metres!