Blockout Blinds with Side Tracks Sydney — Made to Measure, No Light Gaps
The fabric stops the light through the window. The side channels stop the light around it.
Blockout blinds do not usually fail because the fabric is too thin. They fail at the edges. Light comes around the top, down both sides and under the bottom — and on a bright Sydney morning those four thin lines of light are what wakes you up. The fabric is doing its job. The gaps are not.
We make blockout roller blinds with side channels — slim aluminium profiles the fabric runs inside — so the sides are closed, not just covered. Paired with an outside-reveal mount and a pelmet across the top, it is the closest thing to a true blackout you can get from a roller blind. Every blind is measured on site, made in our Sydney workroom and installed by our own team. Send us a photo of your window and your suburb and we will tell you which windows on your place can be sealed, and which ones cannot.
What you may want from blockout blinds
Three things our Sydney customers ask for most.
A bedroom that actually goes dark
The difference between ‘dim’ and ‘dark’ is the edge seal. If a street light or an early sunrise is waking you, the gap is the reason.
A cooler room in a Sydney summer
A closed blind reflects some of the heat coming off a hot pane. It sits behind the glass, so it cannot match an external awning — but it does help.
Fits the window you already have
Chain-driven or motorised, inside or outside the reveal, with or without channels. We will tell you honestly what your window can take before you spend anything.
Where the light actually gets in
A blockout blind does not fail because the fabric is too thin. It fails at the edges — and there are four of them.
Top — between the roller tube and the ceiling
The gap nobody notices until the first morning. A pelmet or headrail box closes it.
Left side — between the fabric edge and the frame
The biggest single leak, and the one that puts a bright line across the wall opposite the window.
Right side — the same gap, mirrored
Side channels fix both sides at once. This is the part a heavier fabric cannot do.
Bottom — under the hem, and at the centre join on wide windows
A brush seal closes the hem. Very wide windows may need two drops, or a linked pair, to stay taut.
Two ways to mount a blind — and why it decides everything
The fabric is the same either way. What changes is whether the edges are covered.
Inside the reveal — neat, and always leaks
The blind sits inside the window recess, flush with the frame. It looks tidy and it is what most off-the-shelf blinds do. It also leaves a visible gap on both sides and usually at the top, because the blind can only be as wide as the opening. Fine for a spare room. Not enough for a bedroom you actually want dark.
Outside the reveal, with side channels — what actually works
The blind is fixed to the wall or the frame face, so it overlaps the opening and runs inside slim aluminium channels on each side. Add a pelmet across the top and a seal at the hem and all four edges are closed. It costs more, it is a second fixing point, and it is the only version of a roller blind we would call a true blackout.
Real installations
See our Blockout Blinds in action across Sydney homes.
Key features
Side channels, not a heavier fabric
Slim aluminium profiles the fabric slides inside. This is the part that actually closes the side gaps — a thicker fabric cannot, because the light is not coming through the material.
Outside-reveal mounting
Fixing the blind to the wall or frame face instead of inside the recess means it overlaps the whole window, so there is far less edge left to leak around.
Pelmet or headrail box
Covers the gap between the roller tube and the ceiling. The top leak is the one most people forget about until the first morning in the new room.
100% blockout fabric
Total darkness through the material, in a wide range of colours and finishes. Tensioned chain or motorised — both child-safe as standard.
Measured, made and installed by us
One company accountable for the fit. If a channel does not sit flush or a blind does not seal, there is nobody to pass it to.
What sealed blockout blinds cost in Sydney
Every figure below is an average, not a quote. These are typical 2026 Sydney ranges for supply and installation. Your price is confirmed in writing only after a free on-site measure, because it depends on your window, the fabric you pick, how the blind is fixed, and access at your property. Two windows of the same size can be quoted hundreds of dollars apart.
| Option | Typical Sydney range — average, supply and install | What it fixes |
|---|---|---|
| Blockout roller blind, mounted inside the reveal | $150 – $500 per window | Stops light through the fabric. Leaves a gap at the top, both sides and the bottom. |
| Blockout roller blind, mounted outside the reveal | $200 – $600 per window | Covers the whole window frame, so the side gaps get much smaller. Top and bottom usually remain. |
| Add a pelmet or headrail box | +$150 – $400 per window | Closes the gap between the roller tube and the ceiling. |
| Add side channels | +$250 – $600 per window | Closes both side gaps. This is the line that takes a room from dim to genuinely dark. |
| Add motorisation | +$400 – $900 per blind | Not a light fix — it is for tall or hard-to-reach windows, and for scheduling. |
If you have seen a quote of $2,000 or more for blockout blinds on one wall and it looked absurd, this table is usually why. A wall is normally three or four windows, and the sealed version of each one is a made-to-measure aluminium channel, not an off-the-shelf blind. Ask any supplier for a per-window price with the channels itemised separately, then compare quotes on that number instead of the total. Ours is fixed and given to you in writing after the free measure — book a free measure and we will confirm your number.
Who this is for
Five situations where the edge seal is the whole point.
Bedrooms where you wake before you want to
If the first thing that starts your day is a line of light across the ceiling, the gap is the problem. A heavier fabric will not change it.
Nurseries and kids’ rooms
A dark room helps a baby settle at nap time and in summer, when it is still light outside at 8pm. Sealed blinds are the most common thing we are asked for in a nursery.
Shift workers sleeping through the day
The hardest case there is. Daylight outside is at its strongest exactly when you need it darkest, so the edge seal matters more here than anywhere else.
Windows facing the street, or a neighbour’s light
A streetlight does not need much of a gap. A single 5mm line of light across a room is enough to keep you awake — and it is usually the side gap, not the fabric.
East windows and early summer sun
A Sydney summer sunrise is around 5:30am and it comes in almost horizontally — exactly the angle a blind with open side gaps cannot stop.
West-facing rooms that hold the afternoon heat
A closed blockout blind takes some edge off a hot pane, but it sits behind the glass. For real heat, external shade does more, and we will tell you which one you actually need.
NOX™ Total Blackout System
A sealed system, not a blind with optional extras — every edge closed as part of the specification.
NOX™ is the name we give the fully sealed version of a blockout blind. A standard blockout blind is sold as a blind plus add-ons, and unless you already know to ask for side tracks, a pelmet and a face-fix mount, what you get stops the light coming through the glass and leaks it around the edges. NOX is specified the other way round: the seal is the product, and the fabric is one part of it.
What “reinforced installation” means
The four gaps a blockout blind leaks through are set out above. NOX is what happens when all four are closed as standard rather than offered as upgrades — and that is a change to the installation, not to the fabric.
1. Mounted on the face of the window, not inside the reveal
Fixed to the wall or the frame face so the blind overlaps the whole opening. Mounted inside the reveal it can only ever be as wide as the hole, which leaves a gap on both sides by definition.
2. Full-height side tracks, fixed top and bottom
Slim aluminium channels run the full height of the opening and are fixed at both ends, so the fabric is held inside the channel from the pelmet down to the sill. A short channel that stops level with the fabric edge just moves the leak.
3. Tracks packed and trued against the surface
This is the step that separates a sealed window from a nearly sealed one. A wall is rarely flat and an architrave is rarely plumb, so a track fitted straight on will sit proud at one end or bow along its length — leaving a hairline gap you will not see in daylight and will not miss at night. The fixings are packed and levelled first, and the channel is checked against the surface for its full height.
4. Pelmet across the top, seal at the hem
A pelmet or headbox closes the roller-tube-to-ceiling gap, and the blind finishes into a bottom seal or sits flush on the sill. Top and bottom are the two gaps people forget until the first morning in the room.
All four are done by the team that measured the window. A sealed system is only as good as the measurement behind it, which is why we do not hand the install to a sub-contractor.
NOX™ vs an ordinary blockout blind
| Ordinary blockout blind | NOX™ Total Blackout System | |
|---|---|---|
| Where it is mounted | Inside the reveal, behind the frame | On the face of the window, overlapping the frame |
| Side light | Open gap between fabric edge and frame | Closed — fabric runs inside full-height side tracks |
| Top light | Open above the roll | Closed by a pelmet or headbox |
| Bottom light | Open at the sill | Sealed at the hem |
| How it is fixed | Brackets into the reveal | Tracks packed and set flush to the wall or frame face |
| What it stops | Light through the glass | Light through the glass and around it |
| The room feels | Dim | Dark |
| Typical use | Living areas, glare, privacy | Bedrooms, nurseries, shift work |
The fabric in the two columns can be identical. Everything that changes the result is in the mounting and the seal — which is why “100% blockout” on a fabric sample tells you nothing about how dark the room will be.
Built for sleep
NOX is the version of a blockout blind we specify when the goal is a room dark enough to sleep in, not just a room with less glare. That means the three groups who need darkness at the wrong time of day:
- Shift workers sleeping through the day. Daylight outside is at its strongest exactly when you need it darkest. There is no softer version of this problem.
- Nurseries and kids’ rooms. Nap time in the middle of the afternoon, and a Sydney summer bedtime that is still bright at 8pm.
- Early risers in east-facing bedrooms. A Sydney summer sunrise is around 5:30am and it comes in almost horizontally — the exact angle an open side gap cannot stop.
Is NOX™ right for your window?
- A window you open every day. Yes. The tracks are fixed to the frame, so you raise the blind clear and the window opens as normal — the seal is only doing its job while the blind is down. If you would rather not reach past anything, we specify face-fix mounting with a pelmet instead: better light control than a standard blockout blind, and nothing in front of the window. We will tell you which one your window is rather than sell you the wrong one.
- A west-facing room. NOX™ is the light half of the answer, and we will say the other half plainly: for the afternoon heat you want an awning or Zipscreen on the outside of the glass, because no blind sitting behind the glass can beat shade in front of it. Most west rooms end up with both — external shade for the heat, NOX™ for the light.
- A very wide opening. Past a certain span the fabric needs a larger tube to stay taut, and one drop will not cover it. We use linked pairs so two drops move as one and the seal holds across the join — tell us the width and we size the tube to it.
- A rental. Some windows take a tension-fit or minimal-fix blind, which cuts the leak without drilling. A fully sealed window fixes into the frame or the wall, so that one needs your landlord’s agreement first — ask us what your window can take before you commit to anything.
What it costs. There is no separate NOX price list, because the system is built from the same measured components as any sealed blockout window — the track, the pelmet and the face-fix mount. In practice a fully sealed window sits at the top of the blockout range rather than the bottom. The per-window figures are in the table above, and your number is confirmed in writing after the free measure. Book a free measure and we will tell you which windows on your place can be sealed, and which ones cannot.
Want the full explanation of the method? Read NOX™ Total Blackout System — how sealed installation makes a bedroom dark.
Frequently asked questions
Related reading
Deeper guides from our Sydney installers.
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