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Hang blackout blinds.
Side-channel or perfect-fit — block 99%+ of light, perfect for nurseries, bedrooms and home cinema.
✓ Updated May 2026✓ Free quotes✓ Vetted pros
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Costs, timelines, pitfalls and the right questions to ask before any blinds starts on blackout Blinds.
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Itemised quotes from up to 3 local blindss on blackout Blinds — so you can compare like-for-like, not lump sums.
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Inside-mount light leak
5-15mm gaps at edges. Need outside-mount with side channels for 100% blackout.
Cheap fabric stretches
Light comes through stretched cheap blackout. Quality 3-pass fabric resists.
Magnetic side seals
Premium addition — magnets seal edges. Worth premium for ultimate blackout.
Light at top
Top of blind doesn't block gap. Quality install adjusts top mount.
Costs & timeline
Know what it costs. Know when it ends.
Indicative UK ranges and what affects price.
Cost range
By job type
Inc. VAT · 2026
Source: NMT quotes
Source: NMT quotes
Standard blackout rollerInside mount
£60–£180
Premium blackout with side channelsOutside mount, 100%
£150–£400
Roman blind blackout-linedPremium aesthetic
£180–£500
Vertical blind blackoutFor wide windows
£120–£300
Cellular blackoutPlus insulation
£180–£500
Velux Velux blackoutFor roof windows
£250–£700
!
Quote spread is typically ± 18% — always get 3 quotes.
At a glance
Infographic · VideoThe Blinds briefing.
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Blinds quick-view
Video guide
Blinds explained
Blackout blinds give total light blockage for sleep quality. Essential for north-facing or sunset-exposed bedrooms. Expect to pay £60–£500 per window for UK blackout blinds.
What Does the Work Invovle?
Specialist measures window. Outside-mount preferred for tightest light seal. Blackout fabric (rubber-backed or specialist blackout-coated). Side channels block edge light. Top channel blocks gap at top. Cord, chain, or motorised. Most UK blackout systems achieve 95-100% light blockage.
Typical Costs
| Item | Low (£) | High (£) | Notes |
|---|---|---|---|
| Standard blackout roller | 60 | 180 | Inside mount |
| Premium blackout with side channels | 150 | 400 | Outside mount, 100% |
| Roman blind blackout-lined | 180 | 500 | Premium aesthetic |
| Vertical blind blackout | 120 | 300 | For wide windows |
| Cellular blackout | 180 | 500 | Plus insulation |
| Motorised blackout | +£200 | +£500 | Smart control |
| Velux Velux blackout | 250 | 700 | For roof windows |
How Long Does It Take?
Lead time: 3-6 weeks. Install: 30-60 minutes per window.
DIY or Professional?
DIY for standard inside-mount. Professional for side-channel premium blackout.
Choosing the Right Tradesperson
Specialist blackout blind retailer. Hillarys, Apollo Blinds, Tuiss offer premium blackout options. Velux for roof windows.
UK Regulations
BS EN 13120 child safety mandatory. Cord-safe devices essential for bedrooms.
Common Problems
- Inside-mount light leak: 5-15mm gaps at edges. Need outside-mount with side channels for 100% blackout.
- Cheap fabric stretches: Light comes through stretched cheap blackout. Quality 3-pass fabric resists.
- Magnetic side seals: Premium addition — magnets seal edges. Worth premium for ultimate blackout.
- Light at top: Top of blind doesn't block gap. Quality install adjusts top mount.
Frequently Asked Questions
100% blackout possible?
With side channels and proper fitting: yes. Light leak common with cheap installations. Specify premium blackout.
Best blackout for bedroom?
Outside-mount roller with side channels + dim-out fabric on opposite wall. Premium specialist install.
Velux blackout roof window?
Yes — Velux DKL/DML blackout blinds. Designed for Velux roof windows. Premium for loft bedrooms.
Roman blackout — possible?
Yes — blackout lining behind decorative fabric. Premium aesthetic plus function. Premium price.
How long does blackout fabric last?
Quality (Curtains 2 You): 10-15 years. UV exposure may degrade. Quality 3-pass blackout maintains.
Blackout vs total darkness?
Standard inside-mount blackout: 95-98% darkness. Premium outside-mount with channels: 99-100% darkness.
This guide was written with AI assistance and is intended for general information only. Prices are estimates based on UK averages and may vary by region. Always get at least three quotes and consult a qualified professional before starting any work.
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