What Are Duo Roller Blinds? Two Fabrics, One Window, Complete Control

Subject: Duo roller blinds
Reviewed by: The Custom Blinds Shutters & Awnings team
Updated: 7 September 2026
Reading time: 4 minutes

What is a duo roller blind and how is it different from a zebra blind?

A duo roller, also called a tandem, double roller or day-and-night blind, mounts two separate roller blinds on one shared bracket: typically a sheer in front and a blockout behind, each on its own chain or motor
A zebra blind is one fabric with alternating sheer and opaque stripes on one roller. You slide the bands to set the light; you cannot get full blockout
Both are called “double roller” in different markets, so in South Africa always ask: one fabric or two
A duo roller needs a recess at least 90mm deep for an inside mount; a zebra fits a shallower cassette
Both are made to measure with free delivery nationwide from the Custom Blinds Shutters & Awnings shop

2Fabrics, one bracket

90mmMinimum recess depth, inside mount

FreeNationwide delivery

“The duo roller is the product I recommend most for bedrooms in South African homes. People want blockout for sleeping, but they also want their bedroom to feel light and open during the day. One bracket, two fabrics, problem solved.”

Duncan Kane Founder, Custom Blinds Shutters & Awnings

How a duo roller blind works

A double bracket holds two roller tubes, one in front of the other, each with its own fabric and its own control. The fabrics never touch.

Day
Lower the sheer. Glare softened, UV filtered, the view kept. The blockout stays rolled up behind it, invisible.
Night
Lower the blockout. Complete darkness and privacy.
In between
Both down, one down, neither. Four configurations from one set of brackets.

Duo, tandem, double, zebra

The same product goes by several names, and one of those names also belongs to a different product.

Duo

Two fabrics

Also called: Tandem roller, day and night, double roller (Australia, UK), dual roller shade (US)
Fabrics: Two, on two rolls, one bracket
Blockout: Yes, complete
Control: Each blind independently

Zebra

One striped fabric

Also called: Double roller, in South Africa, which is the confusion
Fabrics: One, with alternating sheer and opaque bands
Blockout: No; light leaks at the band edges
Control: One mechanism, slide the bands

On this site: duo roller means two fabrics. Zebra or double roller means the striped single fabric.

Duo roller vs zebra vs standard roller

Performance	Duo roller	Zebra	Standard roller
Light control	Sheer to complete blockout	Sheer to about 95%	Fixed by the fabric chosen
True blockout	Yes	No, edge leak	If blockout fabric
Independent control	Each blind	Single mechanism	Single mechanism
Recess depth	90mm	60mm	60mm
Motorised	Somfy, each blind	Somfy	Somfy
Price	Higher, two fabrics plus bracket	Mid	Entry

Three dots excellent. No dots poor or not recommended.

Where duo roller blinds belong

Rooms that ask for different light at different hours.

Duo roller blinds for bedrooms
Soft glow at dawn, darkness at midnight. The product Duncan recommends most for South African bedrooms.
First choice
Duo roller blinds for media rooms
Sheer for daytime use, blockout for the film.
Blockout on cue
Guest rooms and holiday homes
Guests get the choice without a lesson. Neutral tones photograph well.
Guest-ready
Open plan with bedtime transitions
The same window serves the family day and the children’s night.
Two moods

Before you order duo roller blinds

Depth, sizes, fabrics, motors.

Recess depth: At least 90mm from the front edge of the frame to the glass for an inside mount. Shallower, and a face mount above the window works, with the cassette visible
Measuring: Width at three points, use the shortest; drop at three points, use the longest; millimetres
Fabrics: Sheer in front and blockout behind is the standard pairing. Sunscreen with blockout, or light-filter with dimout, where the room asks for it
Motorisation: A Somfy motor on each blind, controlled by remote, app or voice. Scenes: good morning raises the blockout and lowers the sheer; movie time does the opposite
Guarantee: Custom Fit Guarantee on every online order: too big, trimmed free; too small, remade at a reduced price

06 When it is not the answer

Zebra or duo roller: transparency matters.

Variable light but never full blockout: a zebra, slimmer and less. A kitchen or bathroom where light control is secondary: a standard roller in the right fabric. Insulation as the main job: honeycomb outperforms both. Renting and unable to drill: no-drill blinds, though not in a duo configuration.

Buy online:

Duo rollers·Zebra blinds·Roller blinds

Questions buyers ask about duo roller blinds

What is the best blind for a bedroom that needs light by day and dark by night?

A duo roller: a sheer and a blockout on one bracket, each on its own control. Custom Blinds Shutters & Awnings makes them to measure with free delivery nationwide.

Is a duo roller the same as a double roller blind?

It depends who is using the term. Internationally, double roller usually means the two-fabric duo; in South Africa it often means a zebra blind. Check whether the product has one fabric or two.

Can a duo roller blind fully block out light?

Yes. The blockout layer gives full blockout when lowered, unlike a zebra, which leaks at the band edges. That makes it the better choice for bedrooms and nurseries.

How much recess depth do I need for a duo roller?

At least 90mm for an inside mount. Shallower frames take a face mount above the window.

Can duo roller blinds be motorised?

Yes. Each blind takes its own Somfy motor for independent remote, app or voice control, which is what makes day and night scenes possible.

Do you deliver duo roller blinds nationally?

Yes, made to measure and shipped free anywhere in South Africa from the online shop. Garden Route homes can add installation.

What Are Duo Roller Blinds?