Blackout Blinds (Room Darkening Blinds)
The term “blackout blinds” is widely used, but in reality there is no blind that can completely block out all light. In the blinds industry, we use the term room darkening, as this gives a more accurate expectation of what can be achieved.
Different blind styles offer different levels of room darkening, and the overall result depends not just on the fabric used, but also on how and where the blind is fitted, the size of the window, and how much light can seep in around the edges.
Our role is to help you choose the most effective solution for your needs, whether that’s reducing glare, creating a darker bedroom, or achieving the best possible room darkening for daytime sleep or cinema-style rooms.

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Understanding Room Darkening
Room darkening is about reducing incoming light as much as possible, rather than eliminating it entirely. Even with blockout fabrics, some light will always find its way around the edges of a blind.
The more enclosed and well-fitted the system, the greater the level of room darkening you can achieve.
Cost-Effective Room Darkening Options
The most cost-effective way to achieve room darkening is usually with a roller blind using a blockout fabric. Blockout fabrics prevent light passing directly through the fabric itself, but light can still enter around the edges.
Fitting style plays a big role here. A roller blind fitted outside the recess, dropped close to the wall and overlapping the window on all sides, will reduce light seepage far more effectively than one fitted neatly inside the recess.
- Blockout fabric prevents light passing through the material
- Some light seepage around edges should be expected
- Outside recess fitting reduces light gaps
- Cost-effective room darkening solution
Roman and Pleated Blinds for Room Darkening
Roman blinds fitted with a room darkening lining offer a higher level of room darkening than roller blinds in many situations, particularly when fitted inside the recess. The layered fabric construction helps reduce light ingress, although some light will still be visible around the edges.
Cellular pleated blinds are another effective option. Their honeycomb structure helps reduce light and also improves thermal performance. However, when pleated blinds are fitted using Perfect Fit frames, each pane of glass requires its own blind, which introduces additional points where light can seep in.
- Roman blinds offer improved room darkening with lined fabrics
- Best results achieved with inside recess fitting
- Cellular pleated blinds provide insulation and light reduction
- Multiple panes can increase light seepage points

Blind Screens – A High-Performance Room Darkening Solution
Blind screens are one of the most effective room darkening blind systems available. They use a vertically pleated fabric that slides within a dedicated frame, significantly reducing light seepage around the edges.
Because the blind operates within a surrounding frame, far more light can be blocked compared to traditional blinds. This makes blind screens an excellent option for rooms where darker conditions are particularly important.
- Vertically pleated blind operating within a frame
- Significantly reduced light seepage around edges
- Excellent for bedrooms and cinema rooms
- Suitable for daytime sleepers and shift workers

Shutter and Shade – Flexible Room Darkening with Privacy
Shutter and shade systems combine a shutter with a blind concealed behind it, usually a pleated blind fitted within a channel. This offers one of the most effective room darkening solutions available, while also retaining flexibility.
Unlike most room darkening blinds, shutters allow you to close the panels for darkness while still adjusting the louvres for privacy or airflow when required.
- Blind concealed behind shutters for enhanced room darkening
- One of the most effective room darkening options available
- Allows privacy control via adjustable louvres
- More flexible than blind-only solutions
Important Considerations with Room Darkening
The more light you block, the more you also restrict airflow. When windows are open and a room darkening blind is fully closed, airflow into the room will be limited. This is an important factor to consider, particularly in warmer months.
It’s also worth noting that most room darkening blind solutions are either open or closed. Blockout roller blinds, Roman blinds, pleated blinds, and blind screens all operate this way. With the exception of shutter and shade systems, they do not offer combined privacy and light control at the same time without adding an additional window treatment.
- Increased room darkening reduces airflow
- Most room darkening blinds are open or closed systems
- Limited flexibility without additional window treatments
- Shutter and shade systems offer greater control
Blackout Blinds – At a Glance
Room darkening blinds can significantly reduce incoming light, but expectations should always be realistic.
- No blind can completely block all light
- Room darkening is a more accurate description
- Fitting method is as important as fabric choice
- Different blind styles offer different darkening levels
- Frames and channels reduce light seepage
- Professional advice helps achieve the best result
Frequently Asked Questions
Are blackout blinds really blackout?
No blind can completely block out all light. In the blinds industry, the correct term is room darkening. Even with blockout fabrics, some light will always seep in around the edges of the blind.
What does room darkening actually mean?
Room darkening refers to reducing the amount of light entering a room as much as possible. The level achieved depends on the blind type, fabric, fitting position, and how well light is blocked around the edges.
Which blind is the most cost-effective for room darkening?
A roller blind using a blockout fabric is usually the most cost-effective option. While the fabric blocks light passing through it, some light will still come in around the sides.
Does fitting position affect how much light gets through?
Yes. Fitting a blind outside the recess and overlapping the window on all sides will reduce light seepage more effectively than fitting the blind inside the recess.
Are Roman blinds good for room darkening?
Yes. Roman blinds fitted with a room darkening lining can be very effective, particularly when fitted inside the recess. Some light may still enter around the edges.
Are pleated blinds suitable for room darkening?
Cellular pleated blinds are a good option for room darkening and offer additional thermal insulation. However, when fitted in Perfect Fit frames, each pane of glass has its own blind, which can increase the number of places where light can seep in.
What is a blind screen and how effective is it?
A blind screen is a vertically pleated blind that operates within a surrounding frame. Because the blind slides within the frame, it significantly reduces light seepage around the edges and is one of the most effective room darkening blind options available.
Are blind screens suitable for bedrooms or cinema rooms?
Yes. Blind screens are particularly well suited to bedrooms, cinema rooms, and spaces where darker conditions are needed, including for people who sleep during the day.
What is shutter and shade?
Shutter and shade is a system that combines shutters with a blind concealed behind them, usually a pleated blind fitted within a channel. This provides one of the highest levels of room darkening available while retaining flexibility.
Do room darkening blinds affect airflow?
Yes. The more effectively a blind blocks light, the more it will also restrict airflow when the window is open. This is important to consider, particularly in warmer months.
Do room darkening blinds allow privacy and light at the same time?
Most room darkening blind options are either open or closed. With the exception of shutter and shade systems, they do not usually allow light in while maintaining privacy without adding another window treatment.
Which room darkening blind is best for me?
The best option depends on how dark you need the room to be, the type of window, and how the blind will be fitted. Professional advice helps ensure expectations are realistic and the most suitable solution is chosen.
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