Do Blackout Curtains Hide Light From Inside?

Blackout curtains are heavy, dense fabric drapes that help block light from passing through them. They maintain a dark atmosphere, which is necessary for privacy. Sometimes, you might face light escaping from inside at night, which undermines privacy and disturbs your sleep. This light leakage from the window is a common concern. When there is complete darkness outside, it has a significant effect on privacy, sleep quality and energy efficiency. To address this issue wisely, here is our blog post titled ” Do blackout curtains hide light from inside?” in detail. This would help you maintain a secure and comfortable indoor environment.

What Are Blackout Curtains?

Before we start the discussion on the primary concern, you must know about the blackout curtains and how they work. These are heavy drapes which are thick & primarily designed to block any kind of light, whether natural sunlight or artificial streetlight. This way, they induce complete darkness inside.

Window curtains are made from dense fabric and feature multi-layered designs to block light. For extra thickness, they are sometimes lined with foam backing, which enhances their functionality.

In addition to 100% darkness, they also provide thermal insulation and noise reduction. Whereas the room-darkening curtains are also thick & dense, but allow some light to pass through them for a dimming effect. They are suitable for living room curtains and dining areas where you want to block light but not 100%. Blockout drapes are best for bedrooms and nurseries where you need to block light completely.

Do Blackout Curtains Block Light From Inside?

The clear answer to this query is yes, blackout curtains conceal light from inside. However, effectiveness varies with construction and thickness. Because of the layered surface and tightly woven fabric, they do not allow light waves to penetrate. They act like an opaque surface that prevents indoor light from passing through, leaving no room for outsiders to peek into the rooms.

In some situations, some light may still be visible from the blackout window coverings. The main reason for this light escape is gaps at the top, bottom, and sides of the window frame, or improper installation of curtain rods.

Factors That Affect Light Leakage From Inside

The effectiveness of your dense velvet curtains and how much light they block varies greatly. Here are the factors which significantly affect light escape from inside when the outside is dark.

Curtain Fabric and Quality

The tightly woven, high-quality fabric used to manufacture blockout drapes will effectively block light escaping from inside. Similarly, the multi-layered blackout and soundproof curtains are more efficient at blocking light than single-layer drapes.

Curtain Color

The true blackouts offer an opaque surface, so no matter what the colour of the fabric is. But for room-darkening blackout drapes, the colour of the blackout curtain will also affect its efficiency in controlling light. Dark colours will absorb more light, whereas the drapes in light colours will block interior light less effectively.

White or light blackout curtains with backing are excellent in concealing light from inside while keeping the room airy and open.

Curtain Fit and Coverage

To avoid light leakage, your curtain must fit accurately. So, while measuring the width and length, make sure the measurements are accurate. Wrong measurement leads to inappropriate sizing. If the curtains are smaller, they will not fully cover the window and may leave gaps at the sides, top, or bottom. Take the following considerations into account when installing the curtains to prevent light leakage.

• The curtain rod should be placed higher and wider for full coverage and to hide gaps
• Keep the appropriate curtain length for a stylish look and to fill the top & bottom gaps.

Installation Method

Properly installed blackout curtains work efficiently. If the rod placement and distance from the wall are not accurate, there will be light-escape issues. Curtains should be installed close to the window to maximise light blocking. That is what the ceiling-mounted heavy drapes will give a modern look, leaving no gaps. They also offer complete darkness, whereas with wall-mounted rods, there is a gap between the wall and the curtains.

Common Reasons Light Still Escapes at Night

Although your heavy drapes are correctly installed, there is a chance of light escaping at night. The possible reasons behind this issue are given below.

• Light leakage through gaps between the curtain panels
• Improperly hung curtains or undersized curtains
• Bright indoor lighting close to windows may lead to light leakage

How to Prevent Light From Showing Through Blackout Curtains

Whatever the reason for light escaping from inside, you need to follow the following practices when hanging blackout drapes. This will help you prevent light from escaping from your curtains at night.

Choose the Right Curtain Size

• Keep an extra width of your curtains for overlap
• Floor-length or puddled curtains will hide the gaps

Use a Wrap-Around or Double Curtain Rod

• Use wrap-around rods having curved ends for curtains to reduce side gaps.
• Use a double curtain rod for layering with sheer or a liner for better coverage.

Add a Blackout Liner or Backing

• If you do not have specialised blackout curtains, add liners or suitable backing to existing curtains to enhance their light-blocking performance.
• With our thick lining, you will also gain thermal and privacy benefits.

Are Blackout Curtains Good for Privacy at Night?

Because of their efficient light control, blackout drapes are preferable for privacy at night. With sheer curtains, light will penetrate through the fabric, and anyone can see what is going on inside. At night, everyone needs maximum privacy for undisturbed sleep. And the Ideal rooms for blackout curtains are bedrooms, living rooms, and nurseries. With these drapes, no light escapes from inside or from outside, so you can enjoy a completely secure and relaxed atmosphere.

Blackout Curtains vs Other Window Coverings for Light Control

To determine which window treatment is best for light control, we compare blackout curtains with other options. This will help you make the right choice according to your requirements.

Blackout curtains look stylish and provide warmth and privacy with maximum light control. But there will be a small amount of light leakage if it is not installed correctly. At the same time, the blackout blinds offer a sleek look while maintaining 100% darkness even in the morning.

Blinds are also available with blackout lining to control light and provide shade, but they still let light through, making the room feel airy. It would be better to install blackout blinds for precise light control in modern homes, kitchens, and bathrooms, while using blackout curtains in bedrooms and living rooms. For exterior use, shades with thick blackout lining will serve the best.

For large or oddly shaped windows & bay or corner windows, the blackout curtains may not be enough for efficient light control and privacy. It may happen due to possible gaps that filter out some light. You will need some additional solutions to get the desired benefits.

• By using custom-sized curtains
• Layering with thick lining
• Using light-blocking strips, tapes or films
• Adding valances can help you fill gaps.

Final Verdict

In the end, we can conclude that thick fabric blackout curtains block light from inside and provide a secure, relaxed atmosphere. For maximum light control, go for the dense fabric curtain lined with foam backing. Whatever the window size, suitable fabric, fit, and installation make a big difference in achieving 100% privacy. So, always go for the highest quality blackout drapes for the best results.