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Blockout roller blinds installed at Pezula Country Club under a vaulted ceiling with exposed trusses, Pezula, Knysna, by Custom Blinds Shutters & Awnings

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Blockout Blinds

Street lights through thin curtains. A summer dawn at five. A baby who wakes when a car passes. Uncontrolled light steals sleep, and a blockout blind is the fix.

Roller blind guideFrom R671, free nationwide delivery
Subject
Blockout blinds
Reviewed by
The Custom Blinds Shutters & Awnings team
Updated
7 September 2026
Reading time
4 minutes

What are blackout blinds and how do they work?

  1. Blackout and blockout are the same thing: an opaque, coated fabric that stops light passing through the weave. Blockout is the South African term
  2. The blockout roller is the everyday choice: one sheet of fabric on a compact headrail, flat against the window, from R671 made to measure
  3. Blockout honeycomb closes the smallest edge gap of any blind and insulates as it darkens, from R1,308
  4. A roller always leaves a thin line of light at its edges: face-fix with 100mm overlap or add side guides to keep it small
  5. Coulisse and Hunter Douglas fabrics from Custom Blinds Shutters & Awnings, delivered free anywhere in South Africa; no-drill rollers for renters
R610Blockout roller from
R1,308Blockout honeycomb from
100mmFace-fix overlap each side

Blackout or blockout

Two words, one fabric. The distinction that matters is blockout against semi-blockout or dimout, which softens light rather than stopping it. For sleep, a nursery or a home cinema, only true blockout does the job.

Both at once: a duo-roller pairs a sheer with a blockout on one bracket for filtered light by day and darkness at night.

Blockout blind types compared

PerformanceRollerHoneycombVertical
DarknessThrough the fabric; thin edge lineTightest edge gap of any blindVane overlaps let a little through
InsulationSlows solar gainStill air in the cellsModerate
OpenCompact roll at the topSmall stack at the topStacks to one side
No-drillYes; chain operatedNoNo
MotorisedSomfy, MotionBlindsYesYes
Best forBedrooms, nurseries, officesHot or noisy bedroomsWide sliding doors

All three ship nationally from the online shop.

Which rooms need blockout blinds

  • Blockout blinds for bedrooms

    Sunrise before half past five and suburban street lighting. A face-fixed blockout roller gives real darkness; a motorised one can open slowly at your wake time.

    First
  • Blockout blinds for nurseries

    Naps in a bright room are a losing battle. Blockout roller or honeycomb, cordless or motorised for safety; no-drill blinds keep a chain, so drilled cordless is the nursery choice.

    Darkness and safety
  • Blockout blinds for home offices

    Glare gone from the screen; a sheer on the side windows keeps the daylight.

    Glare
  • Blockout blinds for media rooms

    A face-fixed blockout with side guides turns a lounge into a cinema.

    Screens

04   The edge gap

A roller always leaves a line.

Fit it face-fix on the wall with 100mm of overlap each side and above, rather than inside the recess, and most of the line goes. Add side guides, channels the fabric runs in, for the closest fit a roller allows. For the darkest room of all, a blockout honeycomb.

“People always ask which blind is best. I ask them what annoys them most about their window right now. Nine times out of ten, it is light waking them up too early or a bedroom that feels like an oven by midday. That is a blockout problem, and a blockout roller solves it.”
Duncan Kane Founder, Custom Blinds Shutters & Awnings
  1. Measure

    Width and drop in millimetres, three readings each way; for a face fix add 100mm each side. How to measure

  2. Order online

    Fabric and colour, instant price, free delivery nationwide, made in about 5 to 7 working days plus courier transit.

  3. Custom Fit Guarantee

    Wrong measurements supplied: too big is cut down free and returned, too small is remade at a reduced price. Our error: every cost is ours.

Questions buyers ask about blockout blinds

What is the difference between blackout and blockout blinds in South Africa?

Nothing. Blockout is the South African industry term; blackout is used internationally. Both mean opaque fabric that stops light passing through the weave.

Do blockout blinds keep a room cooler in summer?

Yes. The fabric stops solar gain at the window, most strongly in lighter colours and with a face fix that covers the whole opening. Blockout honeycomb insulates most, with still air trapped in its cells.

Can I get blockout blinds without drilling holes?

Yes. No-drill blockout rollers on tension brackets need 40mm of recess depth and no screws, for renters and apartments, delivered nationwide. They are chain operated, not cordless.

How do I stop light leaking around the sides of blockout blinds?

Face-fix on the wall with 100mm overlap rather than inside the recess, and add side guides for the closest fit. For the smallest gap of any blind, a blockout honeycomb.

Are blockout blinds safe for a nursery?

Yes, fitted cordless or motorised: a spring-operated blockout roller or a cordless honeycomb. No-drill blinds keep a chain or cord, so they are not the nursery choice.

Where is the best place to buy blockout blinds online in South Africa?

Custom Blinds Shutters & Awnings. Blockout rollers from R671 and blockout honeycomb from R1,308, made to measure in Coulisse and Hunter Douglas fabrics, delivered free nationwide with the Custom Fit Guarantee.

Further reading on blockout blinds

Content reviewed by the Custom Blinds Shutters & Awnings team. Visit the online shop for current pricing.

Custom Blinds Shutters & Awnings | South Africa’s trusted blinds, shutters and awnings specialists since 2010.

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