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Discover the best thermal curtains to help reduce your energy costs this winter

Keep your home warmer, cosier and help reduce your heating bills this winter with the best thermal curtains to shut out the cold. 

By Mumsnet HQ | Last updated Sep 16, 2022

Best thermal curtains

With fuel bills rising and cold weather on the way, we're all looking to insulate our homes in any way we can - plus, it's just nice to get a little bit cosier for winter, isn't it?

There are lots of obvious things you can do to improve the energy efficiency of your home, including lagging the loft, replacing old windows and fitting draught-excluder strips around windows and doors. But another thing you can do to help is put up thermal curtains - both on your windows and also your doors. 

Thermal curtains don’t need to be expensive and they’re also a great option for renters, who may not be able to make more permanent changes to the building, and also want to be able to take their investment with them should they move. Which? Magazine’s website has lots more advice on staying warm in rented accommodation here

Thermal curtains are made up of several layers of fabrics, including a mould-resistant, breathable lining and a layer of insulation (often a foam type material) in the middle. They work by essentially creating a ‘dead air’ space between the window pane and the rest of the room, keeping the heat in the room (and the heat out during hot weather). In more scientific terms, they give added R-value (thermal resistance) and prevent U-value (thermal conductivity). 

To give you an idea, curtain-makers Deconovo explain it like this: a single-pane window has an R-value of around -1 whereas an insulated wall will be around -15. A properly installed insulated curtain would be around -6, so you can see they make a big difference. They should reduce heat loss by around 25% in the winter months, so you should see a difference in your heating bills as you’ll be able to have the heating slightly lower and for fewer hours. 

If you’re looking to keep your home a little warmer this winter, a pair of thermal curtains will allow you to feel the difference instantly and don’t need to be a huge investment either. We’ve gathered a list of the 10 best thermal curtains in the UK right now that will suit every home and budget. 

Mumsnet HQ's Top Picks

Amazon Umi Thermal Insulated Blackout Curtains
Best value thermal curtains

Amazon Umi Thermal Insulated Blackout Curtains

Buy now
Deconovo Supersoft Thermal Blackout Curtains
Best thermal curtains overall

Deconovo Supersoft Thermal Blackout Curtains

Buy now
Deconovo Blackout Thermal Eyelet Curtains
Best blackout thermal curtains

Deconovo Blackout Thermal Eyelet Curtains

Buy now

The best thermal curtains in the UK: quick look

1. Best overall thermal curtains: Deconovo Supersoft Thermal Blackout Curtains

Deconovo Supersoft Thermal Blackout Curtains

Price £39.99 | Buy now from Amazon

“I just got these for the kids bedroom and they're fab. Not too expensive and I honestly didn't think they were gonna be anything but they're perfect.” AccidentalMom

Mumsnetters rave so frequently about Deconovo curtains, they demanded an entry in our rundown - in fact, we’ve given them two, so deserving did we consider their curtains to be. They get great customer reviews, too, and often appear on ‘top ten’ lists on consumer shopping websites. 

These star-print curtains (available in a range of colours) are great for kids’ rooms and look as good in a nursery as they do in an older child’s bedroom. They’re eyelet style so simply slide onto a curtain pole with no hooks or fuss, and they’re also blackout material - great if you have a child that’s a light sleeper and you want them asleep until after sunrise. 

Key specs

  • Fabric: Polyester
  • Heading: Eyelet
  • Dimensions: Each curtain is 168 x 229cm, but available in many sizes
  • Care: Hand wash only

2. Best value thermal curtains: Amazon Umi Thermal Insulated Blackout Curtains

Amazon Umi Thermal Insulated Blackout Curtains

Price: £18.99 | Buy now from Amazon

“Try Amazon for reasonably priced curtains. They will definitely keep the heat from escaping.” Sh05

If you’re putting up thermal curtains to reduce your heating bills, you probably don’t want to spend a fortune on the curtains themselves - it sort of defeats the purpose. Fear not. There are plenty of options on the market at reasonable prices and Amazon come up trumps with this pair for under £20. 

The pencil pleat curtains hang really beautifully and the fabric feels lovely and soft - they feel much more expensive than their price. They’re available in a wide range of colours to suit any room and are also made in blackout fabric, so work well in bedrooms. Best of all, they’re machine washable so can be easily cleaned if they get grubby in a family home - no need to shy away from the white and cream shades!

Key specs

  • Fabric: Super-soft polyester
  • Heading: Pencil pleat
  • Dimensions: Each Pane is 117 x 138cm, but available in many sizes
  • Care: Machine washable

3. Best thermal blackout curtains: Deconovo Blackout Thermal Eyelet Curtains

Deconovo Blackout Thermal Eyelet Curtains

Price: £15.88 | Buy now from Amazon

“Recently bought some Deconovo curtains from Amazon. Blackout, thermal lined, soft, thick, brilliant quality and amazingly cheap! They do them in a variety of lengths and colours. Definitely worth a look.” BarryTheKestrel

The second pair of Deconovo curtains in our round-up, these plain drapes, available in a large number of colours are billed as ‘nursery curtains’ but would be great in any room, in fact. They’re probably described this way as they’re also blackout curtains, but not being woken by the sun on a Saturday morning is fine with us, too. 

They’re eyelet heading so are installed within moments and are also machine-washable, making them a good choice for a family home. 

Key specs

  • Fabric: Polyester
  • Heading: Eyelet
  • Dimensions: 138 x 117cm, but available in many sizes
  • Care: Machine washable

4. Best thermal curtain for doors: Dunelm Thermal Door Curtain

Dunelm Thermal Door Curtain

Price: From £40 | Buy now from Dunelm

“I have Dunelm thermal door curtains at my front door and they make a huge difference to keeping heat in.” ChoccoGoingCuckoo

Many a Mumsnetter heads to Dunelm for their soft furnishings and their off-the-peg curtains are pretty legendary on the Mumsnet Talk boards. 

If you have a draughty front door, a nice, thick thermal curtain hung in front of it will make a real difference to the warmth of your home. This Jennings curtain in a nice, grey, slubby fabric will bring texture and style to your entranceway as well as helping keep the heat in and the cold out. It’s an eyelet heading, so all you’ll need to do is hang a pole over the door and slide the curtain onto it. 

Key specs

  • Fabric: Polyester
  • Heading: Eyelet
  • Dimensions: 213 x 117cm but available in two sizes
  • Care: Clean professionally

5. Best thermal curtains for warmth: Flower Room Thermal Blackout Curtains for Bedrooms

Flower Room Thermal Blackout Curtains for Bedrooms

Price: £40.00 | Buy now from Amazon

“Having lived in a house without double glazing for many years I'd say made to measure interlined curtains are always warmer than blinds (even interlined roman blinds) but they will be much more expensive. But both will be noticeably warmer than nothing.” JaninaDuszejko

Ideal for bedrooms, these blackout thermal curtains will reduce heat loss, block out light and even dull outside noise a little. They’re also great for summer as they’ll prevent heat coming into the house, too. 

They have a soft, silky feel and are made from a weighted polyester fabric, which helps the curtains hang nicely. With an eyelet heading and washable material, these are really easy to both put up and to care for and will keep your home toasty all winter long. 

Key specs

  • Fabric: Polyester
  • Heading: Eyelet
  • Dimensions: Each panel is 168 x 228cm, but available in many sizes
  • Care: Machine washable and can be ironed on low temperatures

6. Best patterned thermal curtains: Beauoop Lattice Thermal Curtains

Beauoop Lattice Thermal Curtains

Price: £27.99 | Buy now from Amazon

“Get thermal clothes, thermal curtains and thermal everything you can think of for a start. Electric blankets are great too.” MumCanIHaveMumCanIHave

If you’re looking for something a little bolder to keep your home cosy, look no further than these Moroccan lattice-style curtains by Beauoop. The pattern is available in six colourways and the curtains will provide a stylish focal point in any room. 

They’re made from an energy-efficient blackout material that will help regulate room temperature anywhere in the home and blocks out 95-99% of light, too. They feel soft to the touch but are nice and thick, providing really good insulation. The eyelet heading makes them super-easy to hang, too. 

Key specs

  • Fabric: Energy-efficient blackout fabric
  • Heading: Eyelet
  • Dimensions: Each panel is 127 x 183cm but available in many sizes
  • Care: Machine washable

7. Best thermal curtain lining: John Lewis Thermal Lining

John Lewis Thermal Lining

Price: £8 per metre | Buy now from John Lewis

“There are some thermal linings very reduced in the John Lewis sale online. I have a thermal door curtain from there bought in last year’s sale and it works very well.” LemnisKate

There’s something particularly comforting about John Lewis’s soft furnishings department and these linings can be bought online, too. They’re a brilliant idea if you want to improve your home’s energy efficiency but quite like the curtains you already have, as you can simply buy as much fabric as you need and use it to reline your old curtains - or choose a different fabric to perfectly match your decor. 

The lining will make any set of curtains thermal, keeping your rooms warm in winter and cool in summer. The neutral colour complements any fabric and will also enhance the look of your curtains by making them hang better and reducing creasing with their weight. The material is also blackout, so this lining is a good option for bedrooms in particular. 

Key specs

  • Fabric: 70% polyester, 30% cotton, acrylic backing
  • Heading: Not applicable
  • Dimensions: Purchased by the metre
  • Care: Machine washable at 30 degrees

8. Best noise-reducing thermal curtains: Nicetown Insulated Blackout Thermal Curtains

Nicetown Insulated Blackout Thermal Curtains

Price: £75.15 | Buy now from Amazon

For those wanting to reduce noise and light as well as heat loss, these Nicetown curtains tick all the boxes. They cut out twice as much noise as an ordinary single-layer curtain will, and block out 100% of light. The two layers of triple-weave fabric really work to prevent heat loss and keep rooms cooler in summer, too. The curtains are available in six colours and the eyelet heading makes them very quick and easy to hang. 

Key specs

  • Fabric: Not listed
  • Heading: Eyelet
  • Dimensions: 241 x 132cm
  • Care: Machine wash and tumble dry, can also be ironed

9. Best thermal eyelet curtains: Dunelm Luna Curtains

Dunelm Luna Curtains

Price: From £35 for the smallest size | Buy now from Dunelm

"We now have floor - length Dunelm navy Luna blackout curtains (£65) in our bedroom which are fab!" MontyBowJangles

These navy blue curtains in a brushed fabric look as cosy as they feel. With an eyelet heading that’s easy to fit and hang, they’ll bring a bit of contemporary style to any room. They’re also available in a range of different colours. 

With thermal insulation as well as a high-quality blackout coating they’re ideal for a bedroom but would work anywhere in your home. 

For the quality, these are a great price and look much more expensive than they are. 

Key specs

  • Fabric: Polyester
  • Heading: Eyelet
  • Dimensions: 284 x 228cm (but available in a range of sizes)
  • Care: Dry clean with hydrocarbon, cool iron

10. Best thermal curtains for keeping out cold: Fusion Blackout Thermal Curtains

Fusion Blackout Thermal Curtains

Price: £30 | Buy now from Argos

“I bought a pair in Argos and they are great, the room is pitch black.” DeadRinger

Designed for kids’ rooms and nurseries in a blackout fabric, these plain coloured curtains from Argos look great anywhere. They come in 6 modern shades including duck egg, grey and this ochre, and the pencil pleats hang beautifully from either a curtain track or a pole with the addition of curtain hooks. 

The quality of the fabric is good and those who’ve bought them say the Fusion curtains feel thick and are excellent at keeping the cold out where it should be. 

Key specs

  • Fabric: 60% polyester, 40% cotton
  • Heading: Pencil pleat, suitable for tracks and poles
  • Dimensions: Each panel is 117 x 137cm, but available in a range of sizes
  • Care: Dry clean only

How do thermal curtains work?

They create a ‘dead space’ between the window and curtain that prevents cold air from entering the room. They’re like ordinary curtains, but they have an insulated layer in the middle of them that prevents heat escaping from the room so quickly as well as stopping cold air and draughts coming off the windows. If you don’t want to replace your curtains you can always just buy an insulated curtain lining to hang behind your ordinary curtains. 

What material is best for thermal curtains?

Thermal curtains have an insulating layer of foam in the middle of them, as well as a breathable layer that stops condensation forming. The outer layers can be made of anything from cotton to velvet or linen. The thicker the fabric, the better they will keep out the cold, but you also should go for something that stops moisture forming on the side that faces the windows, such as polyester cotton, 

Do thermal curtains keep cold out?

They will make a big difference, particularly if you have no double glazing or draughts coming in around the windows. However, anything more you can do, such as fitting draft exclusion strips around windows and doors will increase the efficiency of thermal curtains. 

What is the difference between thermal and insulated curtains?

They’re essentially the same thing - thermal curtains are insulating your home. Some thermal curtains are also blackout curtains, which will make your room darker as well as warmer, but they don’t all do this so read the packaging closely. 

Should thermal curtains touch the floor? 

They just need to fit the window as snugly as possible. It is best if they come down to the sill or to the floor if they drop straight down, so that cold air can’t creep beneath them. 

Can thermal curtains help reduce heating bills?

Yes. Because you’ve insulated the room you should be able to turn your thermostat down a little or have the heating on less.

Which curtain is best for winter?

All the curtains we’ve featured here will help keep your home warm this winter but honest reviews from Mumsnetters were particularly complementary about Dunelm’s Luna thermal curtains, which are super cosy and available in a range of colours.

Dunelm Luna Curtains
"We now have floor-length Dunelm navy Luna blackout curtains in our bedroom which are fab!"


Dunelm Luna Curtains


Buy now

What are the best thermal curtains?

Of all the curtains we reviewed, we think the Deconovo Supersoft Thermal Blackout Curtains are the best buy. They’re a good price, are both soft and lovely and thick and work really well to insulate your windows. Deconovo is a trusted brand which consumer experts rate highly, so you can’t go far wrong with them.

Deconovo Supersoft Thermal Blackout Curtains
"I just got these for the kids bedroom and they're fab. Not too expensive and I honestly didn't think they were gonna be anything but they're perfect."


Deconovo Supersoft Thermal Blackout Curtains


Buy now

How we chose our recommendations

As always, we began by scouring the Mumsnet Talk boards for real recommendations from real customers. We were looking for glowing reviews as well as for feedback on products that Mumsnetters felt they’d avoid if buying again. Next, we looked at consumer reviews elsewhere on the internet as well as at write-ups from consumer experts on which curtains they felt offered the best insulation and the best value for money. 

Finally, we collated all this information into one long list of products before selecting the ten thermal curtains that we felt would offer something for everyone, no matter what your home style or budget. 

Why you should trust us

We work hard to provide unbiased, independent advice you can trust. We do sometimes earn revenue through affiliate (click-to-buy) links in our articles. This helps us fund more helpful articles like this one.