When you want to cut all the light coming from the window, Blackout window blinds are good choice. They are easy to operate and give a neat clean look. Roller blind are great for minimalistic interior design. While venetian blinds are also a popular choice for blackout blinds, roller blinds are economical in price. Blackout blinds have a layer of vinyl or rubber to completely cut the light. The alignment of roller blinds is very important. Blackout blinds should be installed outside the window frame to get complete blackout. When it is installed within the frame, you will see light coming through on either side of the roller blind. Installation clearance of half of one inch is required to be given on both sides of the roller blind.