Thermal Curtains For Energy Saving: 7 Best Buys (2026)

Every British winter plays the same trick on us. The heating goes on, the meter spins, and the living room still feels like a church hall in February. Windows are the usual suspect, and thermal curtains for energy saving are about the least dramatic fix going: no scaffolding, no builders, no obligation to make anyone tea.

The numbers explain why. The Energy Saving Trust figure, as quoted by the charity Groundwork, is that roughly 18% of heat escapes through the windows of an uninsulated house. Groundwork also repeats an Eco Experts claim of up to £327 a year off a three-bedroom home’s heating bill. Treat that as the optimistic ceiling, not a promise. We’ll do the sums later to see why.

This guide takes a different line from the usual “top ten” lists. It compares seven real products sold on amazon.co.uk, explains what each spec means in practice, and summarises genuine reviewer themes rather than inventing quotes. To be clear about method, this is research-based analysis of published specifications, independent roundups and aggregated reviews. It does not claim hands-on testing. Prices appear as ranges because they move constantly, so check the current price on each listing before you buy.

Along the way you’ll get a clear picture of heat loss through windows. You’ll also learn how thermal lined curtains UK shoppers meet on the high street differ from true thermal interlining, and how to hang the lot so it earns its keep.

What Are Thermal Curtains for Energy Saving?

Thermal curtains for energy saving are multi-layer window coverings, usually a decorative face fabric, a thermal or blackout backing and sometimes a wadded middle layer. They trap a still pocket of air against the glass. That slows heat escaping through windows and cuts draughts, so your heating works less hard.

Quick Comparison: Best Thermal Curtains for Energy Saving at a Glance

Looking at the comparison above, the Deconovo Thermal Insulated Blackout Curtains offer the strongest value under £30. If you want the most convincing drape and the most mass, the NICETOWN Thermal Insulated Velvet Blackout Curtains justify the extra spend. Budget buyers should note that the MIULEE Thermal Insulated Blackout Curtains are often sold in short drops, which gives up some insulation at the bottom edge.

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Top 7 Thermal Curtains for Energy Saving: Expert Analysis

Each pick below pairs the specs with what they mean in a real room. Review sentiment is aggregated from published listings and roundups, and where reviews couldn’t be verified, we say so.

1. NICETOWN 100% Blackout Thermal Curtains (2-Layer Lined) — black-lined insulation for bedrooms

The standout here is the sewn-in black liner, which blocks light and adds a second fabric layer between you and the glass.

Panels typically come 52 inches wide with 63, 84 or 95-inch drops. Silver grommets (1.6-inch inner diameter) slide over most standard poles. In practice, the 84-inch drop suits a floor-length window, and the liner’s extra weight helps the curtain hang straight, keeping side gaps smaller. Triple-weave, two-layer construction traps more still air than a single sheet of polyester, which is the whole principle behind thermal curtains for energy saving.

Based on the spec comparison, this suits north-facing bedrooms and older windows where the indoor-outdoor temperature gap is widest. What most buyers overlook is that eyelets leave small gaps along the top, so mount the pole high and wide.

Reviewers on the wider Amazon listings consistently praise the blackout effect and noise dampening. A recurring caveat is that a few buyers feel the draught-blocking is milder than the light-blocking. Current amazon.co.uk review totals couldn’t be verified, so check the live listing.

Pros:

• ✅ Genuine lined build adds real insulation
• ✅ Strong blackout and noise reduction
• ✅ Wide choice of sizes and colours

Cons:

• ❌ Eyelet top leaves small gaps
• ❌ Seller advises limited washing

Typically £30-£55 for a pair, depending on size (check current price). Verdict: strong value for a properly lined build.

2. Deconovo Thermal Insulated Blackout Curtains — cheapest sensible way into a warmer room

Deconovo’s appeal is simple: it gets you into thermal territory without a painful outlay.

The brand describes triple-weave construction, with high-density black yarn sandwiched between two fabric layers, according to a UK roundup in The Scotsman. A separate retailer comparison notes machine-washable care (cold wash, tumble dry low), which matters more than it sounds, because curtains you can’t wash end up grubby and neglected. One caution from that same Scotsman roundup is that the star-printed children’s version doesn’t deliver full daylight blackout.

On paper, a woven construction is thinner than a foam-backed or wadded curtain. Expect modest rather than dramatic insulation. It is good for dusk-to-dawn closing, but you’d want help from draught strips on a leaky sash window. Many buyers pair these with a pelmet to close the top gap.

Aggregated review sentiment on Deconovo’s blackout range is broadly positive on value, though verified amazon.co.uk review data for this exact model wasn’t available at the time of research.

Pros:

• ✅ Very low cost of entry
• ✅ Easy machine-wash care
• ✅ Plenty of colours and sizes

Cons:

• ❌ Thinner than wadded thermal curtains
• ❌ Some versions aren’t full blackout

Usually under £30 for a pair (check current price). Verdict: excellent value for spare rooms and first-time buyers.

3. Sleepdown Linen Look Eyelet Blackout Lined Thermal Curtains — linen look without the linen chill

These are for people who want cream and oatmeal tones without the draughty feel of real linen.

They’re polyester with a woven linen-style face, with “triple weave” construction and an “eco film” layer that helps block light despite the pale colour, according to The Scotsman’s UK guide. That guide also judged them a little thicker than others at the price. In practice, thickness equals trapped air, so a heavier hand is exactly what you want from insulated curtains for winter.

Our analysis: the pale colour reflects light and brightens a room, which suits living spaces where you want warmth by day and a softer look. Eyelet headings also give a neat, modern fold and slide easily on poles.

The most consistent complaint in published coverage is creasing. The folds take a while to drop out, so steam them or hang them a day before you need them looking sharp.

Pros:

• ✅ Thicker feel than rivals at this price
• ✅ Natural linen look in neutral shades
• ✅ Lined, eyelet-headed and easy to hang

Cons:

• ❌ Creases take time to drop out
• ❌ Not the cheapest option

Roughly the mid-£40s to around £60 (check current price). Verdict: good value if appearance matters as much as insulation.

4. H.VERSAILTEX Thermal Insulated Blackout Grommet Curtains — patterned, silky and still properly thermal

Most thermal curtains look like hotel blackout panels. This brand stands out for patterned and textured options, including geometric prints.

The triple-layer fabric has a silky finish and is machine washable, according to The Scotsman. The same review notes it lacks the thickness and weight of the heaviest thermal curtains. That’s a genuine trade-off: a lighter hand drapes nicely and hangs easily from lighter poles, but it won’t match a wadded door-curtain build for sheer insulating mass.

What the spec sheet won’t tell you, but reviewers note, is that style-led curtains often get hung for looks rather than fit. If you choose this one, hang it close to the glass, wide of the frame, and let it reach the sill or floor, otherwise you’ll waste the layered fabric.

Verified amazon.co.uk review figures for this exact set weren’t available at the time of research, so read recent UK reviews before committing.

Pros:

• ✅ Distinctive patterns beyond plain blackout
• ✅ Machine-washable triple-layer fabric
• ✅ Easy-hanging lighter weight

Cons:

• ❌ Lighter than the heaviest thermal curtains
• ❌ Pricier than plain budget panels

Often around £45-£70 (check current price). Verdict: pay the premium only if pattern matters to you.

5. MIULEE Thermal Insulated Blackout Curtains — budget grommet panels for spare rooms

If you’re dressing a box room, a kitchen or a rental, the appeal is low commitment.

Listings describe thermal-insulated, room-darkening panels with a solid grommet top, often sold in two-panel sets with a 63-inch drop. Pay attention to the wording. “Room darkening” and “full blackout” aren’t the same thing, and a short drop stops at or above the sill. That keeps it clear of radiators and worktops, but leaves a gap at the bottom where convection can happen.

For energy saving, short drops work best on windows with a deep sill or a radiator beneath, where floor-length curtains would be impractical. For bedrooms, choose a longer drop and consider adding a pelmet.

One independent US roundup placed this set as a budget option, but UK review sentiment couldn’t be verified at the time of research, so treat it as an unproven value pick and read current UK feedback.

Pros:

• ✅ Very affordable for a thermal-labelled set
• ✅ Short drops suit sills and radiators
• ✅ Simple grommet fitting

Cons:

• ❌ Short drops leave bottom gaps
• ❌ Less proven UK review history

Typically under £35 (check current price). Verdict: fine for secondary rooms, but not my first choice for a main bedroom.

6. Deconovo Thermal Door Curtain (80 x 84 inch, Extra Wide Eyelet) — a draught barrier for hallways and front doors

This is the odd one out, and arguably the most strategic buy on the list.

It’s a lined, thermal-lined door curtain, 80 inches wide by 84 inches long, with an eyelet heading and an extra-wide cut. Extra width matters. Hung on a pole well beyond the door frame, the curtain overlaps the edges, so it intercepts draughts from letterbox, keyhole and the gaps around the frame, not only the door slab.

Government guidance on simple draught-proofing lists thick curtains alongside brush strips and excluders, and this is the product category that fits. Think of draught excluder curtains as a finishing layer. They soften the cold air and warm the hallway, but they work best paired with proper edge strips.

Verified review sentiment for this specific door curtain wasn’t available at the time of research, so check recent buyer feedback on the listing.

Pros:

• ✅ Extra-wide cut overlaps door frame
• ✅ Thermal lining at a low price
• ✅ Draws open for everyday access

Cons:

• ❌ Needs a sturdy pole above the door
• ❌ Sold as a single panel

Often in the £15-£30 range (check current price). Verdict: very good value for the draughtiest door in the house.

7. NICETOWN Thermal Insulated Velvet Blackout Curtains — heaviest-looking drape for lounges

Velvet isn’t just glamorous. It’s heavy, and weight is your friend when you’re fighting cold glass.

One independent roundup describes NICETOWN velvet as its “luxury feel” pick. The dense pile and the lined backing both add mass and trap air. In the US, Cornell Cooperative Extension guidance puts a conventionally hung drape at 5 to 10% heat-loss reduction against about 25% for a lined one sealed on all four edges. Heavy velvet makes sealing easier because it falls straight and stays put.

The catch is practical. Heavier curtains need a robust pole and strong brackets, and dust shows more on dark velvet. Choose a pole rated for the weight and fix into masonry or a stud, not plasterboard alone.

Verified UK review sentiment for this velvet range couldn’t be confirmed at the time of research, so read recent reviews on the exact listing.

Pros:

• ✅ Heavy, dense drape adds insulating mass
• ✅ Luxurious look suits lounges
• ✅ Lined construction aids light control

Cons:

• ❌ Needs a strong pole and brackets
• ❌ Dust and pet hair show easily

Likely around £40-£75 depending on size (check current price). Verdict: worth it for a main living space where looks and warmth both count.

Top 7 comparison

Looking at the table above, the two NICETOWN sets and the Sleepdown Linen Look Eyelet Blackout Lined Thermal Curtains carry the most explicit lined construction. The Deconovo Thermal Door Curtain is the only one built for doors, which makes it the best narrow-purpose buy. If you’re choosing one set for a whole house, the cheapest pair isn’t automatically the best fit. Match drop length and weight to each window.

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Insulated Curtains for Winter: How to Hang, Seal and Maintain Them

Buying good insulated curtains for winter is only half the job. Hanging is where the savings are won or lost. A gap of a few centimetres at the top lets warm air spill over the curtain, cool against the glass and fall back into the room. That loop quietly undermines everything.

1. Measure and mount high. Fix the pole as close to the ceiling as you can, or well above the frame. As a common fitting rule of thumb, extend it 15-20cm beyond each side of the window.
2. Choose the right drop. The Scotsman’s UK guide advises hanging curtains to a length between the windowsill and the floor, and keeping them close to the glass.
3. Seal the edges at night. The same guide suggests Velcro, hooks or magnetic strips so edges press to the frame or wall and can be released easily. A pelmet or valance adds another barrier.
4. Open by day, close at dusk. Let south and west-facing windows bank free sun, then close as the temperature drops.
5. Maintain them. Follow care labels (some seller guidance for lined sets advises limited washing). Vacuum monthly and check Velcro and brackets each autumn.

The UK government’s draught-proofing factsheet lists thick curtains among simple draught-proofing options. Treat them as one layer in a system, not a magic fix.

Real-World Scenarios: Which Thermal Curtains Suit Which Home?

These are illustrative profiles, not customer testimonials.

The renter in a Victorian terrace. A single-glazed sash bedroom, a modest budget and nightly use. Here, the NICETOWN 100% Blackout Thermal Curtains (2-Layer Lined) make sense for the lined build, paired with removable Velcro strips (check your tenancy first). Budget: £30-£55 for the pair.

The family in a 1990s semi. Double-glazed windows and French doors, with the heating on from October. The H.VERSAILTEX Thermal Insulated Blackout Grommet Curtains suit the lounge if the patterns appeal, while the Deconovo Thermal Insulated Blackout Curtains handle the children’s rooms affordably. Budget: roughly £120-£200 for the whole ground and first floor.

The draughty hallway. A front door with an unsealed letterbox and a cold hall. The Deconovo Thermal Door Curtain (80 x 84 inch, Extra Wide Eyelet) goes on a pole above the door, with brush strips as a base layer. Budget: £15-£30 for the curtain, plus a few pounds in strips.

Frequency matters in every scenario. These curtains only earn their keep if you close them every evening. If you’re out until 9pm, put them on a routine: close when you switch the lights on.

Problem → Solution: Fixing the Annoyances of Thermal Curtains

Problem: a gap at the top of eyelet curtains. Add a pelmet, a fixed valance or a deeper pole position so warm air can’t spill over.

Problem: condensation behind the fabric. Open curtains each morning and ventilate kitchens and bathrooms. The Scotsman’s guide notes daytime opening also helps with dampness.

Problem: creasing straight out of the bag. The Sleepdown Linen Look Eyelet Blackout Lined Thermal Curtains attract this complaint in published coverage. Steam them while hanging.

Problem: a radiator under the window. Choose sill-length curtains, or consider an interlined Roman blind, which Ideal Home’s coverage recommends for this situation. Floor-length curtains can trap radiator heat behind them.

Problem: a freezing front door. Add draught excluder curtains like the Deconovo Thermal Door Curtain and seal the letterbox.

Heat Loss Through Windows: What the Numbers Really Say

The Energy Saving Trust figure is about 18% of heat lost through windows in an uninsulated house. Hillarys, a blind specialist, quotes about 20%. Both figures describe heat loss, not your bill.

Now the useful bit. Industry sources suggest drawing ordinary curtains at dusk cuts heat loss by around 15%, and well-fitted thermal curtains by up to 25%. Apply that up-to-25% reduction to the roughly 18% that escapes through windows, and the whole-house heat-loss saving comes out near 4.5%. That is simple, illustrative arithmetic, not a guarantee. It’s why a headline claim of £327 a year looks generous, and why quoting a smaller, honest figure is more useful.

Wind makes a difference too. Everest notes that heat loss from a home increases when it’s windy, so leaky, exposed windows are where thermal curtains for energy saving help most. Groundwork also cites the Energy Saving Trust on glazing: A++ rated double glazing in a single-glazed home could save around £170 a year, far more than curtains but at far greater cost.

The practical takeaway is straightforward. Curtains are a low-cost, low-risk layer. They work best on single glazing, older windows and exposed rooms, and they work worst when left open all evening.

How to Choose Thermal Curtains for Energy Saving

1. Check the construction. Look for a genuine lining or multi-layer build, not just a “thermal” label on one thin sheet. Layers trap air, and trapped air is the insulation.
2. Match width and drop to the window. A pair should be at least 1.5 to 2 times the window width so it can overlap the frame. Aim for sill-length or floor-length depending on radiators.
3. Think about weight. Heavier fabric, such as velvet or a wadded lining, drapes straighter and seals better, but needs a stronger pole.
4. Pick the heading. Eyelets are easy but leave small gaps. Pencil pleat with a pelmet can seal better.
5. Decide on blackout. Blackout and thermal often overlap, but they aren’t the same. Check the wording, especially “room darkening” labels.
6. Check the care label. A machine-washable curtain gets washed. A dry-clean-only one often doesn’t.
7. Set a realistic budget. Mid-range lined curtains usually beat bargain thin ones on warmth per pound.

Thermal Lined Curtains UK vs Thermal Interlining: What’s the Difference?

Shoppers on the UK high street meet two terms constantly, and they overlap. Thermal lined curtains UK retailers sell are usually ready-made panels with a thermal or blackout backing sewn onto a decorative face fabric. That’s the type most of the picks above fall into.

Thermal interlining is a separate middle layer of insulating material, such as foam, felt or flannel, sandwiched between the face fabric and the lining. The Scotsman’s guide notes that the most effective curtains use a middle thermal layer, and that some manufacturers weave the layers together to make thinner, cheaper options.

So which should you buy? For most homes, ready-made thermal lined curtains give the best balance of price and performance. Add interlining if you’re commissioning made-to-measure curtains for a very cold room, such as a north-facing period lounge. If your existing curtains are good quality, Groundwork notes you can add thermal lining to them, which may be cheaper than starting again.

Our analysis: interlining adds the most benefit where curtains are heavy, floor-length and sealed at the edges. Add it to thin, short, loosely hung curtains and the gains shrink.

Draught-Proof Curtains and Draught Excluder Curtains for Doors and Windows

Heat doesn’t just conduct through glass. It also leaks through gaps. The Energy Saving Trust’s draught-proofing advice covers strips, brushes and excluders for windows and doors. Estimates of the saving vary by source and year, from around £25 to over £60 a year for a typical home, so check the current figure.

Draught-proof curtains work as a second line of defence. They don’t replace strips and sealant. They soften what gets past them and keep the room warmer.

Draught excluder curtains are best at doors. Choose an extra-wide, lined panel such as the Deconovo Thermal Door Curtain (80 x 84 inch, Extra Wide Eyelet) and hang it on a pole beyond the door frame. Internal doors only need this treatment if they lead to a room that isn’t normally heated, as Energy Saving Trust guidance on internal doors notes.

One caution: don’t seal kitchen or bathroom windows so tightly that moisture has nowhere to go. Damp is a bigger problem than draughts.

Thermal Curtains vs Alternatives: Blinds, Shutters and Secondary Glazing

Looking at the table above, thermal curtains win on cost and flexibility, while secondary glazing wins on raw performance. The percentages come from brand and industry sources, so treat them as directional rather than directly comparable. For period sash windows, Historic England’s draught-proofing guidance is worth reading before you alter the windows themselves. Curtains are the reversible option, which matters in listed and rented homes.

Long-Term Cost & Maintenance: Do Thermal Curtains Pay Back?

Payback depends on what you save, and nobody can promise a figure for your home. So here’s an honest, illustrative calculation using a hypothetical £40 and £60 pair.

Looking at the table, even cautious assumptions repay a budget set within a few winters, because curtains last many years. A £40 pair kept for eight winters costs about £5 per winter before any saving. The Deconovo Thermal Insulated Blackout Curtains pay back fastest on that arithmetic, while the NICETOWN Thermal Insulated Velvet Blackout Curtains pay back more slowly but may last longer and look better.

Maintenance is cheap. Wash according to the label, vacuum monthly, re-fix Velcro and check poles each autumn. Sun fades fabric, so don’t leave dark curtains in full midday sun forever.

Common Mistakes When Buying Thermal Curtains for Energy Saving

Buying too narrow. A curtain exactly as wide as the window can’t overlap the frame, so cold air slips round the sides. Buy wider.

Ignoring the drop. Short curtains leave a gap below, which defeats the point. The MIULEE Thermal Insulated Blackout Curtains suit sills, not floor-length windows.

Confusing blackout with thermal. They overlap but aren’t identical. Check the construction, not just the label.

Leaving them open at dusk. The savings are earned by closing them, every evening.

Covering radiators. Floor-length curtains hung over a radiator can trap heat behind the fabric, so use sill-length curtains or a blind there.

Skipping the pole. Heavy curtains on a flimsy pole sag, and sagging creates gaps.

FAQ

Conclusion

Thermal curtains for energy saving won’t rewrite your heating bill, and anyone promising a miracle is selling something. What they do offer is a cheap, reversible, genuinely useful layer against heat loss through windows, particularly on older glazing. The best results come from three things working together: a properly lined build, a snug fit and the habit of closing them at dusk.

Our pick for most bedrooms is the NICETOWN 100% Blackout Thermal Curtains (2-Layer Lined). The Deconovo Thermal Insulated Blackout Curtains are the budget choice. The Sleepdown Linen Look Eyelet Blackout Lined Thermal Curtains and H.VERSAILTEX Thermal Insulated Blackout Grommet Curtains suit style-led living rooms, and the NICETOWN Thermal Insulated Velvet Blackout Curtains add heft where you want it. For hallways, the Deconovo Thermal Door Curtain (80 x 84 inch, Extra Wide Eyelet) is a small purchase with an outsized effect. The MIULEE Thermal Insulated Blackout Curtains earn a place in spare rooms and kitchens, where short drops make sense.

Check the current price and recent UK reviews on each listing, measure twice, and hang them high and wide.

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