Why Blackout Blinds Matter Canada's summer daylight starts as early as 5 AM. Blackout window treatments block 99–100% of incoming light for quality sleep. Best Options 1. Blackout Roller Shades Most popular choice. For true blackout, choose outside mount with side channels. 2. Blackout Cellular Shades Total darkness plus excellent insulation — a double benefit for Canadian winters. 3. Blackout Drapery Floor-to-ceiling lined drapes create a dramatic, hotel-like blackout effect. Pro Tips Choose outside mount for complete coverage Add side channels to roller shades Go 4+ inches wider than the window on each side Motorize everything for instant control Get a blackout blinds quote →