Can Wave Curtains Be Blackout Lined?

Yes. Wave curtains can be made with blackout lining, just like many other curtain styles.

The blackout lining helps stop daylight passing through the curtain fabric, so the room will usually feel much darker than it would with unlined curtains.

The important thing to understand is that blackout lining only blocks light through the curtain fabric. It does not remove every gap around the curtain.

What Does Blackout Lining Actually Do?

Blackout lining is added to the back of the curtain fabric to reduce the amount of light passing through the curtain itself.

It can also improve privacy and may help make the curtains feel slightly more substantial.

If bright daylight is shining directly through a window, blackout lining can make a big difference because it stops most of that light coming through the fabric.

However, blackout lining does not seal the curtain to the ceiling, wall or window frame.

Blackout Lining and Blackout Performance Are Not the Same Thing

This is where a lot of confusion starts.

Many people assume that if curtains are blackout lined, the room will become completely dark.

In reality, blackout lining blocks light through the fabric. Blackout performance depends on the whole setup, including the curtain heading, track position, curtain length and any gaps around the edges.

So yes, wave curtains can be blackout lined. But the finished result will still depend on how the curtains hang.

Why Does Light Escape from the Top of Wave Curtains?

Wave curtains hang differently from standard pencil pleat curtains.

With many standard curtain tracks, pencil pleat curtains hang in front of the track and often help hide it when the curtains are closed.

Wave curtains usually hang underneath the track. This creates a cleaner modern look, but it also leaves a more noticeable gap between the top of the curtain and the ceiling or track.

If strong daylight is coming through the window, some of that light can escape through this gap.

How Do the Wave Folds Affect Light Leakage?

Wave curtains form a smooth pattern of forwards and backwards folds.

This is what gives them their modern, flowing appearance.

However, those folds also mean the curtain does not sit flat across the top of the window.

Light can escape through the spaces created by the wave shape, especially near the top of the curtain where the fabric hangs below the track.

This is similar to the issue people sometimes notice with eyelet curtains. The curtain fabric may be blackout lined, but the heading style itself can still leave gaps where light shows through.

Why Can the Light Gap Look Worse with Blackout Lining?

This often catches people by surprise.

Blackout lining blocks most of the light trying to pass through the curtain fabric itself.

As a result, the curtain fabric looks much darker. This can make any remaining light leakage around the top of the curtains appear more noticeable.

Without blackout lining, some daylight may pass through the fabric, creating a more evenly lit appearance across the whole curtain.

With blackout lining, the curtain fabric becomes darker, so the light escaping around the top can stand out more clearly.

In reality, the blackout lining is still doing its job. The room will usually be much darker than it would be with unlined curtains.

Do Blackout Wave Curtains Work as Well as Pencil Pleat Curtains?

If we are only talking about blocking light through the fabric, both can work well when blackout lining is used.

The difference is how the curtains hang from the track.

Pencil pleat curtains on a standard glider track usually hang closer to the track and can help cover the track area when closed.

Wave curtains hang lower under the track and form forwards and backwards folds, so they generally allow more light leakage around the top.

What If Maximum Darkness Is the Main Priority?

If your main priority is making the room as dark as possible, wave curtains may not be the best curtain-only option.

They can still make a room much darker when blackout lined, but the top gap and wave folds mean some light leakage is likely.

For maximum light control, you may want to consider a blackout blind fitted inside the window recess, with curtains added for softness and appearance.

Another option is to choose a more traditional curtain heading, such as pencil pleat curtains, fitted on a standard curtain track.

Are Blackout Wave Curtains Suitable for Bedrooms?

Yes, blackout lined wave curtains can be used in bedrooms.

They can reduce light through the fabric and help create a darker, softer feel in the room.

The important thing is to have realistic expectations. They are unlikely to create complete darkness on their own.

If the bedroom needs to be very dark, especially for shift work, young children or light sleepers, a blackout blind behind the curtains may be a better solution.

Next Step: Choosing the Right Wave Curtain Setup

If you like the look of wave curtains, they can still be a lovely choice with blackout lining.

The key is understanding what they will and will not do. They can make the room much darker, but they are not usually the best option if total darkness is the main aim.

If you are planning wave curtains for a bay window, it is also important to make sure the track position gives the curtain enough room to hang correctly.