Shutters can make a bedroom or living space noticeably darker, but complete blackout is not their primary function. The louvres and panels remain movable and have functional gaps. Realistic expectations help prevent disappointment.
Most direct light is blocked
When the louvres are fully closed, the direct beam of light is significantly reduced. This can considerably soften bright sunlight in particular. The exact result varies according to the window’s orientation and the time of day.
Why some light lines remain
A narrow line of light may remain between the louvres, along the panel joints and around the frame. Uneven window reveals or a required cut-out for window handles can also affect the fit.
A dark colour is no guarantee
Black absorbs more light and can look darker when closed, but a gap remains a gap. The fit, adjustment and louvre position have more influence on direct light leakage than colour alone.
Cover strips and precise installation
A suitable cover strip or overlap can reduce certain light lines. However, the solution must leave room for ventilation, operation and panel movement. Made-to-measure shutters minimise unnecessary gaps but cannot make a movable product completely airtight.
When additional blackout is needed
For those who need complete darkness, an additional blackout solution may be considered. The available depth and heat build-up would then need to be assessed technically.
Short answer
The essentials at a glance
In a bedroom, the choice is about privacy, peace and control over morning and evening light. Shutters significantly reduce light, but they are not completely light-tight roller shutters.
Practical: Decide in advance how much privacy and light reduction you expect. The louvre position and panel configuration can then be designed accordingly.
The choices that make the difference
Four points to assess before requesting a quotation
Desired level of light reduction
Decide whether your priority is limiting visibility from outside or making the room as dark as possible.
Louvre and split configuration
A split configuration can provide privacy below while allowing daylight in above.
Colour and ambience
Light shades create a calm look, while dark wood or black can create a more cocooning, hotel-style atmosphere.
Furniture and access routes
Beds, cupboards and radiators must not obstruct the opening of the panels.
Avoid disappointment
Common mistakes when buying shutters
- Expecting complete blackout
- Failing to account for a bed or cupboard in front of the window
- Looking only at closed shutters
From idea to installation
How a carefully managed made-to-measure process works
- Collect photos and approximate measurements of the windows.
- Compare material, colour, louvre size and operation.
- Have every window professionally measured at multiple points.
- Confirm the panel layout, technical details, price and schedule.
- Have your shutters installed, adjusted and explained to you.
In practice
See how these choices work in real homes
The projects below were measured and installed by DeVo. You can see real colours, window shapes and technical solutions.
Frequently asked questions
How dark does a bedroom become with shutters?
With the louvres closed, much of the direct light is reduced, but narrow lines of light may remain visible. The result depends on the orientation, window type, fit and colour of the room.
Which louvre position reduces light most effectively?
The louvres should close fully and evenly, in the direction that best blocks the direct light. The optimum position may vary throughout the day.
Can additional blackout be installed behind shutters?
Sometimes, but the available depth and operation must allow for it. The combination is assessed technically during the measuring appointment to prevent collisions and heat build-up.
Is the same solution suitable for every window or room?
No. What you can realistically expect from light reduction. Window type, dimensions, installation position, material load and everyday use are assessed for each situation.
What does DeVo check during the professional site survey?
We take measurements at multiple points and check the frame, reveal, handles, opening direction, windowsill, available panel clearance, and the desired louvre and panel configuration, among other details.
How do louvre size and panel configuration affect the result?
They determine how many lines you see, how open the view through is and how practically the panels can open. The proportions in relation to the window matter more than one standard size.
Can I compare materials, colours and operating options first?
Yes. During your consultation and in the Oud-Turnhout showroom, you can compare current collections, colour samples, louvre sizes and operating options side by side.