If you want a bedroom properly dark, the blind matters less than the fit. The best blackout blinds UK shoppers can buy in 2026 are the ones that cover the light gaps at the sides, sit close to the wall, and use a fabric that blocks early summer sun rather than just softening it.
In This Article
- What Blackout Blinds Actually Solve
- Best Overall Blackout Blind for Most UK Bedrooms
- What to Measure Before You Buy
- Best Blackout Blinds by Room and Budget
- Fitting Options: DIY, Made-to-Measure and Rental-Friendly
- Common Blackout Blind Mistakes
- Care, Safety and When to Replace
- Frequently Asked Questions
What Blackout Blinds Actually Solve
Blackout blinds are for light control first. They can make a room feel calmer, help with privacy, and take a little glare off screens, but the main job is simple: reduce the light hitting your eyes when you are trying to sleep.
That matters in UK bedrooms because our awkward light is not only summer sunrise. It is the street lamp outside the bay window, the neighbour’s security light, the low winter sun bouncing off pale walls, and the landing light leaking through a child’s bedroom door at 6am.
The fabric label can be misleading. A blackout fabric blocks light through the material, but light can still leak around the sides, over the top, and under the bottom bar. A cheap ready-made roller blind fitted inside a deep recess may still leave two bright strips down the side. A more modest blind fitted outside the recess with enough overlap can perform better.
I would separate the decision into three parts:
- Fabric: blackout coating, thermal backing, moisture resistance, or a softer Roman blind lining.
- Fit: inside recess for a neat look, outside recess for better darkness, or cassette/side channels for the closest seal.
- Room: adult bedroom, nursery, rented flat, bathroom, shift-worker room, or guest room.
For sleep itself, the NHS sleep guidance still comes back to a quiet, comfortable routine and a room set up for sleep. A good blackout blind is not a cure for bad sleep habits, but it removes one common irritation: lying awake in a room that never feels dark.
Best Overall Blackout Blind for Most UK Bedrooms
The best overall pick for most people is the Dunelm Blackout Roller Blind, usually around £6 to £26 depending on size. It is cheap enough for a spare room, comes in sensible colours, and is easy to trim if your window size is slightly awkward. If I were sorting a normal UK bedroom this week, that is the one I would start with.
The catch is fit. The basic Dunelm roller blind works well when you mount it outside the recess with at least 7cm overlap on both sides and above the window. Fit it inside the recess and you get a cleaner look, but you also invite those two side strips of light. In a north-facing room it may be fine. In an east-facing bedroom in June, you will notice.
If you want something still affordable but a bit more flexible, the Argos Home Blackout Roller Blind starts from about £8. It is a useful quick-buy option if you need click-and-collect and do not want to wait for samples. The Habitat Blackout Latte Roller Blind also starts from about £8 and looks less basic than the cheapest white rollers.
For a nicer main bedroom, the John Lewis ANYDAY Blackout/Thermal Roller Blind is around £15 to £34. It feels more polished than the cheapest blinds, and the thermal backing is useful in older houses where bedroom windows are draughty. It is not magic insulation, but it does make the window area feel less bare.
For the darkest result, made-to-measure wins. A Blinds 2go blackout roller or Roman blind often lands roughly between £35 and £90 for a typical bedroom window, depending on fabric and size. Add a cassette or side channels from a specialist supplier and the price can climb beyond £100, but that is the route for shift workers, babies’ rooms, and anyone who is sensitive to light.
My practical ranking:
- Best cheap fix: Argos Home Blackout Roller Blind, from about £8.
- Best all-rounder: Dunelm Blackout Roller Blind, about £6 to £26.
- Best nicer ready-made option: John Lewis ANYDAY Blackout/Thermal Roller Blind, about £15 to £34.
- Best for awkward windows: made-to-measure blackout roller blind, often £35 to £90.
- Best for near-total darkness: blackout blind plus curtains, or a cassette blind with side channels, usually £100+ fitted.
What to Measure Before You Buy
Measure before you fall in love with a colour. Blackout blinds fail more often because of sizing than because the fabric is poor.
Start with the recess. Measure the width at the top, middle, and bottom in centimetres. Then measure the drop on the left, middle, and right. UK window recesses are not always square, especially in older houses, and a 1cm difference can decide whether a blind catches on the wall or leaves a bright line.
If you are fitting inside the recess, use the smallest width and drop. Ready-made blinds often include brackets in the stated width, so check the product notes. Argos Q&A pages often state the fabric width separately from the bracket width, which matters because the cloth is usually narrower than the full mechanism.
If you are fitting outside the recess, add overlap. I like 7cm to 10cm on each side and above the window where the wall allows it. That extra coverage is what turns “blackout fabric” into a dark room. On a narrow window, you may need a wider blind than looks natural on paper.
One small thing people miss: handles. If your window handle sticks out, an inside-recess roller blind may rub against it or sit too far forward. Venetian-style blackout blinds are worse here because slats need room to tilt. For a bedroom where darkness matters, a roller outside the recess is usually cleaner.
The other measurement is the drop point. If the blind stops exactly at the sill, it may glow at the bottom. If you can run it a few centimetres below the sill, you get a better seal. In a child’s room, keep safety devices and cords out of reach, which I will come back to later.
Best Blackout Blinds by Room and Budget
Different rooms need different answers. A blind that is fine in a guest room can be annoying in a nursery, and a lovely Roman blind may be the wrong choice for a steamy bathroom.
Adult bedroom: ready-made roller blind plus curtains
For most adult bedrooms, I would buy a Dunelm or John Lewis blackout roller blind and keep curtains if you already have them. The blind blocks the main window light; the curtains soften the side gaps and make the room feel less bare.
A sensible setup might be:
- Dunelm Blackout Roller Blind: about £6 to £26, good for spare rooms and quick upgrades.
- John Lewis ANYDAY Blackout/Thermal Roller Blind: about £15 to £34, better finish for a main bedroom.
- Blackout curtain lining: often £15 to £40 from Dunelm or Amazon UK if your curtains are thin.
This is also the easiest route if you already followed a calmer bedroom scheme from our guide to bedroom colour schemes for better sleep. You do not need to redesign the room; just control the window.
Nursery or child’s room: cordless or safety-first
For a nursery or child’s bedroom, I would prioritise cordless, wand-operated, or properly tensioned designs over the cheapest blind. A £10 saving is not worth a dangling loop near a cot or bed.
Look at cordless blackout rollers where possible. They often cost more, roughly £25 to £70 ready-made, but they remove the most obvious hazard. If you use a corded blind, follow the GOV.UK blind cord safety guidance: use a tidy, tensioner or cleat, keep cords out of reach, and move furniture away from window covering cords.
This is one of those areas where “good enough” is not good enough. If the blind is in a room where a child plays, naps, or climbs, choose safety first and darkness second.
Rented room: no-drill tension blind or blackout curtain
Renters have two problems: they need darkness, and they do not want to lose a deposit over bracket holes. Dunelm’s Plain Simply Fit Blackout Roller Blind is around £12 to £26 and uses a tension fitting inside the recess. It is a good first stop if the recess is square enough.
The compromise is that no-drill blinds depend on a firm, even recess. If the wall is crumbly, tiled, or uneven, they can slip. In that case, blackout curtains on an existing pole may be safer. A pair of basic blackout curtains from Argos, Dunelm or Amazon UK often costs £20 to £50.
For rented bedrooms, I would avoid complicated adhesive tracks unless reviews are excellent. Heat, condensation and old paint can make adhesive fittings peel away at the worst time.
Bathroom or kitchen: moisture-resistant roller blind
Bathrooms need a wipeable blind. A fabric Roman blind may look better, but steam and splash marks are not kind to soft folds. Dunelm’s Blackout Moisture Resistant Roller Blind is about £12 to £32 and is a better fit for bathrooms or kitchens.
Do not expect a bathroom blackout blind to behave like a bedroom cinema blind. Privacy and glare control matter more here. If your bathroom faces a neighbour, go for a moisture-resistant blackout roller or frosted film plus a blind.
Shift-worker bedroom: made-to-measure or cassette blind
If you sleep during the day, skip the cheapest inside-recess option. You will spend the next year noticing every glowing edge.
For shift work, I would price up a made-to-measure blackout roller with outside-recess overlap, then consider side channels if the room still leaks light. A typical made-to-measure blind might be £35 to £90; a cassette blind with channels can be £100 to £200+ depending on size and supplier.
Pair it with dark curtains and a door draught strip if hallway light leaks in. It sounds fussy until you try sleeping after a night shift in a bright July bedroom.
Guest room: cheap roller is fine
For a guest room, the £8 Argos Home Blackout Roller Blind is fine. Guests are not judging the mechanism, and you probably do not need side channels. Spend the saved money on better pillows, or use it to upgrade tired bedding. Our guide to making your bed like a hotel covers the bits guests notice more.
Fitting Options: DIY, Made-to-Measure and Rental-Friendly
The main fitting choice is inside or outside the recess.
Inside-recess fitting looks neater. The blind sits within the window opening, so it does not cover wall space and works well with curtains. It is best for living rooms, offices and bedrooms where near-total darkness is not needed.
Outside-recess fitting is better for sleep. The blind sits on the wall above and around the recess, covering the light gaps. It looks a little more obvious, but in a bedroom I will take that trade-off every time.
DIY fitting is realistic if you can drill, level brackets, and trim a roller tube. Budget blinds usually come with universal brackets, screws and basic instructions. You may still need:
- Drill and bits: about £25 to £60 if you do not already own one.
- Wall plugs and screws: about £3 to £8 from Screwfix or B&Q.
- Junior hacksaw: about £6 to £12 for trimming the roller tube.
- Metal tape measure and spirit level: about £10 to £20 combined.
Made-to-measure is worth paying for when the window is wide, the recess is uneven, or the blind will be seen every day. You pay more, but you avoid the faff of trimming fabric and second-guessing bracket widths.
Rental-friendly fitting usually means tension brackets, existing curtain poles, or asking the landlord for written permission before drilling. No-drill blinds are tidy when they work, but they are not the answer for every recess. If the blind falls down once, the recess probably is not suitable for that fitting system.
One note on smart blinds: they are tempting, especially if you already use sleep tracking or smart routines. But a motorised blackout blind usually costs far more than a manual one, often £120 to £300+ depending on size and motor. For most bedrooms, I would spend first on fit and fabric. Smart control is the bonus, not the foundation. If you are already interested in sleep tech, our piece on using sleep data to improve your routine gives a better starting point than motorising a bad blind.
Common Blackout Blind Mistakes
The first mistake is buying the same width as the glass. You are covering the window opening, not the pane. If the blind only covers the glass, light will pour around it.
The second mistake is trusting product photos. A blind photographed in a styled bedroom may look darker than it performs in your east-facing room. Check reviews for daylight photos, not just close-ups of fabric.
The third mistake is choosing white for a room that needs darkness. White blackout fabric can work because the backing does the blocking, but dark colours hide edge glow better. In a nursery or shift-worker room, navy, charcoal or dark grey is usually more forgiving.
The fourth mistake is ignoring side light. If darkness is the goal, a blackout blind inside the recess plus pale curtains may disappoint. Either fit outside the recess, add curtains with proper return, or look at side channels.
The fifth mistake is buying a Roman blind for a messy room. Roman blinds look softer, but they gather dust in folds, cost more, and are not ideal near condensation. They suit adult bedrooms better than kitchens, bathrooms or rooms where children handle the blind every morning.
The final mistake is treating “thermal blackout” as heating. A thermal blind may reduce the cold feeling near a window, but it will not fix single glazing, draughty frames or a cold loft. If your bedroom is chilly, combine the blind with proper curtains, draught-proofing and warmer bedding. Our guide to layering bedding for every season is a better fix for the bed itself.
Care, Safety and When to Replace
Most roller blackout blinds need light cleaning, not washing. Dust them with a microfibre cloth or vacuum gently with a brush attachment. For marks, use a damp cloth and mild soap. Do not scrub the coated side; once the backing is damaged, light starts finding its way through pinholes.
Roman blackout blinds need more care. Vacuum the folds regularly and spot clean gently. If the lining starts to crease badly or separate, it may never hang flat again.
Child safety deserves its own check. Every corded blind in a child’s room should have a safety device fitted and used every time. Cleats need to be high enough that children cannot reach them. Tensioners should keep chains taut. Beds, cots, toy boxes and chairs should not sit under the window where a child can climb.
Replace the blind when:
- The backing cracks: pinholes become visible when the sun hits it.
- The roller slips: the blind drops or will not stay level.
- The cord or chain frays: safety and usability both suffer.
- The brackets loosen: repeated tightening no longer holds them securely.
- The fabric curls: side gaps get worse and the blind looks tired.
If you are replacing several blinds at once, do the bedrooms first. Living room glare is annoying; poor bedroom darkness affects sleep. For children’s rooms, also read our advice on choosing bedding for children, because blinds and bedding need to work together rather than fight the room.
Bottom line: for most UK bedrooms, buy a good-value blackout roller blind and fit it outside the recess with proper overlap. The Dunelm Blackout Roller Blind at about £6 to £26 is the value pick; the John Lewis ANYDAY blackout/thermal option at about £15 to £34 feels nicer; made-to-measure at roughly £35 to £90 is worth it for awkward windows or daily-use main bedrooms.
If you need the room very dark, do not obsess over the label. Obsess over gaps. Fit outside the recess, add curtains if needed, and treat cord safety as non-negotiable in any room used by children.
Frequently Asked Questions
Are blackout blinds better than blackout curtains? Blackout blinds are better for neat window coverage, while blackout curtains are better at softening side gaps. For the darkest bedroom, use both.
How much should I spend on blackout blinds in the UK? Expect about £8 to £35 for a ready-made roller blind, £35 to £90 for made-to-measure, and £100+ for cassette or side-channel designs.
Should blackout blinds go inside or outside the recess? Inside looks neater, but outside gives better darkness because it covers the side and top gaps. Bedrooms usually benefit from outside fitting.
Are blackout blinds safe for children’s rooms? They can be, but avoid loose cords and chains. Choose cordless designs where possible, or use properly fitted cleats, tidies or tensioners out of reach.
Do blackout blinds keep heat out? They can reduce direct sun and make a room feel cooler, but they are not air conditioning. Thermal-backed blinds help more than thin fabric in sunny rooms.
Can renters fit blackout blinds? Yes, but use no-drill tension blinds, existing curtain poles, or get written permission before drilling. Basic blackout curtains are often the lowest-risk rented option.