Light is one of the biggest disruptors of sleep — and in Canada, summer mornings mean sunrise as early as 5 AM. If you're waking up earlier than you'd like, your window coverings might be the problem. The right blackout curtains can make your bedroom genuinely dark, and that single change can have a noticeable effect on how well you sleep.
This guide covers what to look for in blackout curtains, how they compare to room-darkening options, and which styles work best for different bedroom setups.
What Makes a Curtain Truly Blackout?
The term "blackout" gets used loosely in retail, so it's worth understanding what it actually means. True blackout curtains block 99–100% of incoming light. They typically use a tightly woven fabric with a blackout lining — often a multi-layer backing that prevents any light from passing through the fabric itself.
Room-darkening curtains, by contrast, block most light but not all of it. They're a good choice for rooms where you want to reduce light without creating complete darkness — like a living room or nursery where some ambient light is acceptable. For bedrooms where total darkness is the goal, true blackout is the better choice.
Watch for Light Gaps
Even the best blackout fabric won't help if light is sneaking in around the edges. For best results, mount curtains well outside the window frame — at least 4 to 6 inches on each side — and as close to the ceiling as possible. This minimizes the gap between the curtain and the wall where light can creep in.
Blackout Curtains vs. Blackout Roller Shades
Blackout curtains and blackout roller shades both block light effectively, but they work differently and suit different aesthetics. Curtains add softness and texture to a room and tend to feel more traditional or cozy. Roller shades are sleeker, take up less visual space, and are easier to operate with one hand.
Many bedroom setups combine both: a blackout roller shade for functional light control, with drapery panels on either side for a finished, layered look. This approach gives you the best of both — full blackout coverage and a polished aesthetic.
How Blackout Curtains Improve Sleep Beyond Light
Light blocking is the main benefit, but blackout curtains do more than darken a room. The thick, lined fabric also dampens outside noise — useful if you live near a busy road or in an urban neighbourhood. And the added insulation layer helps maintain a comfortable bedroom temperature year-round, keeping the room cooler in summer and warmer in winter.
For shift workers who sleep during the day, or for children who need to nap when it's light outside, blackout curtains are one of the most impactful changes you can make to the sleep environment.
Choosing the Right Style for Your Bedroom
Blackout curtains don't have to look heavy or institutional. Modern blackout fabrics come in a wide range of colours, textures, and weights. Light neutrals like linen-look whites and warm greys are popular because they keep the room feeling open even when the curtains are drawn. Deeper tones like navy or charcoal create a cocooning effect that many people find ideal for sleep.
For a cleaner look, blackout roller shades in a minimal fabric are a great alternative. They sit flush inside or just outside the window frame and all but disappear when raised.
Frequently Asked Questions
Do blackout curtains make a room hot?
Blackout curtains actually help regulate room temperature. In summer, they reflect heat from the sun back outside, keeping the room cooler. In winter, they add an insulating layer that reduces heat loss through the window.
Can I get blackout curtains in colours other than dark tones?
Yes. Blackout lining is independent of the outer fabric colour. You can get white, cream, or any light colour with full blackout lining. The outer colour faces the room; the lining faces the window.
How do I hang blackout curtains to minimize light gaps?
Mount the rod as close to the ceiling as possible and extend it at least 4–6 inches beyond each side of the window frame. Use curtains wide enough to overlap the wall on both sides when closed. This is the most effective way to eliminate light gaps without any additional hardware.
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