Best Radiator Reflector Foil UK (2026): Top 5 We'd Buy
Reflector panels and foil rolls for radiators on cold outside walls, and an honest look at when they are worth it
Quick answer
- Best overallRadflek Radiator Reflector Panels – pre-cut sheets with clips, made in the UK
- Best rollFabian Clarke London 5m Roll – thick 4mm foil with sticky pads
- Best for two or three radiatorsvolila 10m Roll – 6m² of foil and 12 sticky pads
- Best slim foilBLOSTM 5m Roll – the thinnest here at 2.4mm
- Best for a whole houseCUQOO 25m Roll – one big roll for many outside-wall radiators
The best radiator reflector foil UK homes can buy, for most people, is the Radflek two-panel pack. The two pre-cut sheets are made in the UK, come with fixing clips and cover up to four radiators. If you want a cheaper roll you cut to size, the Fabian Clarke London 5m roll is our pick.
Be clear about what foil can do. The Energy Saving Trust says it works best behind radiators on uninsulated external walls, where it can save around £18 a year in Great Britain. On internal walls it is not really worth it, because the heat that goes into the wall stays in your home. Below we help you check if it suits your home, then compare five Amazon UK picks. Cheaper wins usually come first: see our best draught excluders UK guide and our best thermal curtains UK picks, and try our draught-proofing savings calculator to see what sealing gaps could save. We have not tested these ourselves.
Editor's Choice
Radflek Radiator Reflector Panels (2 Panels)
Our top pick. Pre-cut sheets with clips are a tidy way to start, and clip-on fitting suits renters who cannot stick things to the wall, as long as the landlord agrees.
Diagnose your problem
How to Choose Radiator Reflector Foil
Four quick questions to find the right one.
Problem
Is the radiator on an outside wall?
An outside (external) wall has the garden, street or open air on the other side.
Recommendation
If the radiator is on an internal wall between two rooms, skip foil. The Energy Saving Trust says it is not really worth it there, because the heat stays in your home. Only buy enough for radiators on outside walls.
Products
Professional advice recommendedProblem
Is that outside wall insulated?
Your energy performance certificate (EPC) lists your wall type and any insulation.
Recommendation
Uninsulated outside walls, often solid brick or stone in older homes, are where foil helps most. If your walls are already insulated, expect a smaller benefit, and look at draught excluders first.
Products
Problem
Do you rent?
You may not be allowed to stick things to the walls.
Recommendation
The Energy Saving Trust says clip-on panels are easy to fit and remove, so they suit renters, but ask your landlord first. The Radflek pack comes with fixing clips. Sticky pads on rolls can mark paint.
Products
Problem
How many radiators are on outside walls?
Measure each radiator so you know how much foil you need.
Recommendation
One or two: a 5m roll such as the Fabian Clarke or the slim BLOSTM. Two or three: the volila 10m roll. Lots of radiators on solid outside walls: the CUQOO 25m roll works out cheaper per metre.
Quick Picks
The right radiator foil for each kind of home
Our Top 5 Picks
Compare all
Radflek
Radflek Radiator Reflector Panels (2 Panels)
“Our top pick. Pre-cut sheets with clips are a tidy way to start, and clip-on fitting suits renters who cannot stick things to the wall, as long as the landlord agrees.”
Best for
Most homes, and renters who want clip-on panels
Skip it if
Your radiators are on internal walls, or you need to cover lots of radiators cheaply.
Pros
- +Two sheets cover up to four radiators (listing says)
- +Fixing clips included
- +Made in the UK (listing says)
- +Long-running seller with thousands of UK reviews
Cons
- −Costs more per square metre than foil rolls
- −Only 1.44m² in the pack
- −Some buyers say the clips feel flimsy, and clip fitting does not cover the area outside the brackets
All specifications
| Format | Pre-cut sheets |
| Size | 2 x 120 x 60cm |
| Fixing | 8 clips |
| Covers (listing) | Up to 4 radiators |
Fabian Clarke London
Fabian Clarke London Radiator Foil Reflector Roll, 5m x 60cm
“The best roll if you want to cut your own pieces. It was the top seller in its Amazon UK category when we checked, and you get more than twice the area of the Radflek pack.”
Best for
Covering a few radiators on outside walls at a low price
Skip it if
Your radiator sits very close to the wall, or you cannot stick things to the walls.
Pros
- +Thickest foil here at 4mm (listing says)
- +Sticky pads included
- +3-year warranty (listing says)
- +Number one in Household Insulation Accessories on Amazon UK when we checked
Cons
- −A floppy roll, so it is fiddlier to fit than pre-cut sheets
- −Sticky pads can mark paint when removed
- −Thicker foil may not fit very tight gaps
All specifications
| Format | Foil roll, 4mm |
| Size | 5m x 60cm |
| Fixing | Sticky pads |
| Covers (listing) | 3m², about 5 radiators |
volila
volila Radiator Foil Insulation Roll, 10m x 60cm
“Good value if you have two or three radiators on outside walls. Twice the length of the 5m rolls for a few pounds more.”
Best for
Homes with two or three radiators on outside walls
Skip it if
You only have one radiator on an outside wall, as a 5m roll will do.
Pros
- +10m roll, 6m² of foil
- +12 sticky pads included
- +Strong UK rating
- +Can be folded and reused next winter (listing says)
Cons
- −More than you need for one radiator
- −A floppy roll, fiddlier than pre-cut sheets
- −The rating is shared with other roll lengths
All specifications
| Format | Foil roll, 3mm |
| Size | 10m x 60cm |
| Fixing | 12 sticky pads |
| Covers (listing) | 6m², about 3 radiators |
BLOSTM
BLOSTM Foil Insulation Roll, 5m x 60cm
“The slimmest foil here, which helps if your radiator sits close to the wall. Budget for some tape, as fixings are not listed.”
Best for
Radiators with only a small gap behind them
Skip it if
You want fixings in the box, or clip-on panels for a rental.
Pros
- +Thinnest pick at 2.4mm (listing says)
- +Moisture and tear resistant (listing says)
- +Strong UK rating
- +Also sold in 10m and 25m rolls
Cons
- −No sticky pads mentioned, so you may need to buy tape
- −Thinner than the other rolls here
- −Sold for many uses, not just radiators
All specifications
| Format | Foil roll, 2.4mm |
| Size | 5m x 60cm |
| Fixing | Not listed, buy tape |
| Covers (listing) | 5m x 60cm (3m²) |
CUQOO
CUQOO Radiator Foil Heat Reflector Roll, 25m x 60cm
“For older homes with lots of radiators on solid outside walls. It costs much less per metre than the 5m rolls, but only buy it if you really have that many outside-wall radiators.”
Best for
Older solid-wall homes with many radiators on outside walls
Skip it if
You only have a few radiators on outside walls, or your walls are insulated.
Pros
- +Lowest price per metre here
- +Enough for up to 10 large radiators (listing says)
- +Sticky pads included
- +Leftover foil can be stored for later
Cons
- −Far more than most homes need
- −Listing gives conflicting thickness figures
- −Some buyers say the sticky pads were poor or missing
All specifications
| Format | Foil roll |
| Size | 25m x 60cm |
| Fixing | Sticky pads |
| Covers (listing) | Up to 10 large radiators |
Compare All Products
Side-by-side specs for quick decision-making
Swipe to compare →
| Product | Format | Size | Fixing | Covers (listing) | Price | Best For | Action |
|---|---|---|---|---|---|---|---|
 Radflek Radiator Reflector Panels (2 Panels)Best Overall | Pre-cut sheets | 2 x 120 x 60cm | 8 clips | Up to 4 radiators | £18–£20 | Most homes, and renters who want clip-on panels | View |
| Foil roll, 4mm | 5m x 60cm | Sticky pads | 3m², about 5 radiators | £13–£15 | Covering a few radiators on outside walls at a low price | View | |
 volila Radiator Foil Insulation Roll, 10m x 60cmBest for Two or Three Radiators | Foil roll, 3mm | 10m x 60cm | 12 sticky pads | 6m², about 3 radiators | £18–£20 | Homes with two or three radiators on outside walls | View |
 BLOSTM Foil Insulation Roll, 5m x 60cmBest Slim Foil | Foil roll, 2.4mm | 5m x 60cm | Not listed, buy tape | 5m x 60cm (3m²) | £12–£14 | Radiators with only a small gap behind them | View |
 CUQOO Radiator Foil Heat Reflector Roll, 25m x 60cmBest for a Whole House | Foil roll | 25m x 60cm | Sticky pads | Up to 10 large radiators | £25–£28 | Older solid-wall homes with many radiators on outside walls | View |
Switch Off and Let Radiators Cool First
The Energy Saving Trust says to switch off your heating or turn the radiator off at its valve and let it cool before fitting foil. Do not use kitchen foil. Do not pull a radiator away from the wall or loosen its brackets to make room. If you rent, ask your landlord before sticking anything to the walls.
Research Methodology
How We Chose These Products
We have not tested these ourselves. This is desk research, so we have not measured how much heat these panels reflect.
We read the Energy Saving Trust advice on radiator reflector panels, Amazon UK listings for panels and foil rolls, maker specs and verified UK buyer reviews about fitting, sticky pads and thickness. We compared format, size, fixings and thickness. We did not repeat heat reflection percentages from listings, because we cannot check them. Prices and ratings are from Amazon UK on the day we checked. We never make up prices or test results.
Selection Criteria
Easy Fitting
25% weightCut to size, fixings included and fits behind a radiator without moving it
Buyer Reviews
25% weightStar rating, number of reviews and complaints about pads, thickness or tearing
Coverage
20% weightHow much area you get and how many radiators it should cover
Value for Money
20% weightPrice per square metre compared with build and fixings
Renter Friendly
10% weightClips or easy removal rather than permanent adhesive
Important Limitations
- •We have not tested these ourselves
- •Heat reflection figures on listings are maker claims, and we do not repeat them
- •Some listings give conflicting thickness or coverage figures
- •Savings depend on your walls, your radiators and your tariff
- •Price bands are rough, so always check the current Amazon UK price
Research last conducted: · Price bands checked:
Frequently Asked Questions
Common questions about radiator reflector foil in the UK
For most homes, we pick the Radflek two-panel pack. The two pre-cut sheets come with clips and cover up to four radiators. For a cheaper roll, the Fabian Clarke London 5m roll is our pick. The volila 10m suits two or three radiators, the BLOSTM is the slimmest, and the CUQOO 25m roll suits homes with many radiators on outside walls.
Yes, says the Energy Saving Trust, but it works best behind radiators on uninsulated external walls. It reflects heat back into the room instead of letting it soak into a cold outside wall. You need purpose-made reflector panels or foil, not kitchen foil.
No. The Energy Saving Trust says it is not really worth adding panels to internal walls. A radiator on a wall between two rooms warms that wall, and the heat stays in your home. Only fit foil behind radiators on outside walls.
The Energy Saving Trust says panels on uninsulated external walls can save around £18 a year in Great Britain and £20 in Northern Ireland, and cut around 60kg of carbon a year in Great Britain. That is a modest saving, but most packs cost under £20.
Check your energy performance certificate (EPC). It describes your walls, for example solid brick with no insulation, or cavity wall with insulation. You can look up certificates for homes in England, Wales and Northern Ireland on GOV.UK, and Scotland has its own EPC register.
No. The Energy Saving Trust says aluminium kitchen foil will not work. It is hard to keep in place and does not have the insulation or design of proper radiator panels.
Measure the radiators on outside walls. Switch the heating off and let the radiators cool. Cut the foil a little smaller than the radiator, cut slits for the brackets, then slide it behind and press it onto the wall with sticky pads or tape. Some panels, like Radflek, come with clips instead.
The Energy Saving Trust says clip-on panels are easy to fit and remove, so they are a good option for renters, but check with your landlord first. Sticky pads and tape can mark paint, so ask before using them.
Pre-cut panels, like Radflek, are quicker to fit and can come with clips, which suits renters. Rolls cost less per square metre and you cut them to any size, but they are floppier to fit. Check whether fixings are included, as some rolls do not list any.
Start with the cheapest wins. The Energy Saving Trust says draught proofing windows, floors and doors could save around £55 a year in Great Britain, much more than foil. Thermal curtains help too. Our draught-proofing savings calculator, linked above, shows what sealing gaps could save in your home.
Got radiators on cold outside walls?
Our top pick, the Radflek two-panel pack, has two pre-cut sheets and fixing clips and covers up to four radiators.
View Our Top Pick on Amazon UKDisclosure & Editorial Policy
Amazon Affiliate: TopMagpie is a participant in the Amazon Services LLC Associates Programme. We earn from qualifying purchases. This doesn't affect our editorial choices or the prices you pay.
No Lab Testing: We have not laboratory-tested these products. Recommendations are based on spec analysis, reviews, and editorial judgement.
Prices: Approximate bands, checked . Amazon prices change frequently – always verify the current price before purchasing. We do not invent live prices.
Data Source: The £18 figure is from the Energy Saving Trust. Actual results vary based on your specific situation.
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