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An Ideal Home report comparing blackout curtains and blinds says neither guarantees a completely dark bedroom: light can enter around the edges unless the window dressing is fitted to limit gaps. Curtains can soften a room and help cover more of the window, while blinds offer a streamlined look and adjustable light control. For the strongest light reduction, one curtain-maker recommends layering a blackout blind with blackout-lined curtains and closing off gaps at the top and sides.
An Ideal Home report comparing blackout curtains and blinds finds that neither option guarantees a completely dark bedroom: light can enter through small gaps around the window dressing. Experts quoted in the report say the choice depends on fitting, room layout and priorities, with layering a blind and curtains suggested for people seeking stronger light control.
Curtain-maker Pat Giddens says complete blackout is difficult without a sealed system. Even a small gap around a curtain or blind can let light through, and blackout lining can make the remaining light more noticeable. With blinds, gaps may appear at the sides, top or bottom. Giddens recommends fitting a roller blind wider and taller than the window opening to reduce those openings; cassette systems with side channels and a headrail can enclose the blind more closely.
The report describes a difference in appearance and control. Hillarys product manager Victoria Robinson says curtains can bring softness and warmth, while blinds tend to have a cleaner look and allow more precise adjustments to light. Roman blinds are presented as a fabric option with a more compact profile. Robinson also says a blackout roller blind layered with blackout curtains can combine light control with a softer finish.
For everyday use, Robinson says blinds are easier to adjust for brightness, privacy and glare, while curtains are generally either open or closed. Roller blinds are also described as easier to dust or wipe than curtains and Roman blinds, which may need more care. Both types can be motorised, according to the report. Before buying, shoppers should account for radiators, furniture and other obstacles, and measure the track or pole and curtain drop—or decide whether a blind will sit inside or outside the window opening.
How Fit Shapes Bedroom Darkness
The practical difference is not simply whether a product is called “blackout.” How closely it covers the window can determine how much light reaches the room, so the product’s dimensions and installation matter alongside its material. That distinction may affect people choosing window coverings to reduce early-morning light or make a bedroom darker.
There are trade-offs beyond darkness. A roller blind may suit a compact room or someone who wants adjustable light and a wipe-clean surface; curtains may suit people seeking a softer look and broader coverage. Layering both can add cost and occupy more space, so the report does not present it as necessary for every bedroom. It is an option for those prioritising light reduction over simplicity.
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The Fit Behind Blackout Claims
The report frames the decision around four considerations: light control, appearance, maintenance and fitting. Its central qualification is that “blackout” does not by itself promise total darkness. Light may still enter around the edges, and the amount can vary with the window, installation and strength of daylight.
Giddens also cautions that performance can feel different across seasons. Longer summer days and stronger sunlight put more pressure on window coverings than darker winter conditions, she says. The report offers practical choices rather than test results: it does not compare named products under controlled conditions, but summarizes advice from the two industry experts it quotes.
““Complete blackout is exceedingly difficult to achieve unless you have a fully sealed system.””
— Pat Giddens, curtain-maker
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What the Comparison Cannot Settle
The report does not identify a single best choice for every bedroom or provide measured light-blocking results for particular products. It also does not specify prices, installation costs or how much additional darkness a layered setup delivers. Those outcomes will depend on the window dimensions, the product and how closely it is fitted.
It remains unclear from the source material whether the experts’ guidance applies equally to every window shape or every type of blackout fabric. The report says professional advice may help avoid measurement mistakes, but does not give a standard installation specification or guarantee of total darkness.
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Measure Before Choosing a Style
For shoppers, the next step is to assess the window and surrounding space before choosing a product. Measure the actual fitting area, consider furniture and radiators, and decide whether a blind will be installed inside or outside the frame. For curtains, measure the pole or track and the intended drop rather than relying only on the window dimensions.
Anyone whose main priority is reducing light can compare a well-sized blind with curtains, or consider layering them and covering gaps at the top and sides. Check cleaning instructions and the available operating options, including motorisation. The report recommends seeking professional advice if measurements or fitting choices are uncertain; it does not identify a further test or announcement due next.
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Key Questions
Are blackout curtains or blackout blinds better at blocking light?
Neither is automatically better. The report says gaps around the edges can let light into a room, so fitting and coverage matter. Curtains may help cover more of the window; blinds can be sized to extend beyond the opening or fitted in a cassette with side channels.
Do blackout window coverings make a room completely dark?
Not necessarily. Curtain-maker Pat Giddens says complete blackout is difficult without a sealed system. Even small openings around a curtain or blind can allow light through.
Can I use blackout curtains and blinds together?
Yes. The report describes layering a blackout roller blind with curtains as an option. Giddens recommends blackout-lined and interlined curtains with a blind, plus a pelmet or another way to close gaps at the top and sides, for stronger light control.
Which is easier to clean?
Hillarys product manager Victoria Robinson says roller blinds are generally easier to dust or wipe down. Curtains and Roman blinds are fabric and may need more care; check the product’s care instructions before cleaning.
What should I measure before buying?
For curtains, measure the track or pole and the required drop. For blinds, decide whether they will fit inside the window opening or across its exterior. Also check for nearby furniture, radiators and other obstacles that could affect the choice.
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