Skylux 160° CE met koepel en metaalopstand met dubbele LM motor 1300 x 2500 mm KKB O 1050 1050 Is this electric roof access Is this electric roof access with PVC curb 20 00 & iWindow3 flat roof window 1000 x 1000 mm Roof opening = daylight size the solution you are looking for 93 W m²K in combination with a single walled skylight 90 73 63 20 Double walled Opal (A D) 2 17 49 59 Heatstop PC Double walled Clear (T H) 2