The product is available to purchase online or in-store
Lauren Haughey Lifestyle and Money Reporter
01:01, 04 Oct 2025
The B&Q product is designed to reflect heat back towards the centre of a room (stock image)(Image: Olga Dobrovolska via Getty Images)
Households across Britain are preparing for a tough winter as energy bills keep climbing following this week’s energy price cap update. Ofgem’s cap rose by 2% on October 1, meaning typical dual-fuel households paying by Direct Debit will pay £1,755 annually.
Whilst this news may prove worrying, there are several steps you can implement to lessen the financial blow. You may be surprised to hear that one such measure could involve buying an unlikely item from B&Q.
Retailers even suggest that using this product could reduce domestic heating loss by ‘up to 50%’, potentially enabling you to reduce your long-term energy consumption. The aluminium ‘Diall Radiator reflector’ foil is on sale for £14.97.
The 5m2 reflective material is engineered to be trimmed to the ideal size behind your radiators. It functions by bouncing heat back into the space, reducing heat loss through poorly insulated walls.
B&Q’s Diall Radiator reflector foil is currently £14.97(Image: B&Q )
“Cut the product to size (using scissors or cutter), taking account for the incisions for the radiator brackets,” B&Q retailers advise, according to the Express. “Apply adhesive on the polystyrene side. Slip the product behind the radiator & press on carefully.”
Please note that the product can only withstand temperatures up to 60°C, but it has a solid consumer approval rating of 4.4/5 stars and a Green Star claim as well.
Nonetheless, if you’re not entirely sold on the Diall Radiator reflector foil, there’s a wealth of alternatives available online. Screwfix is offering a bargain on their insulating foil, with a 195mm x 500mm roll priced at just £10.99, while The Range also offers various insulating sheets, including one at £11.69.
The B&Q aluminium foil can be trimmed to snugly fit behind your radiators (Image: Alan Morris via Getty Images)
Draughtproofing is deemed as one of the easiest ways to save money on energy bills. According to the Mirror, Karen Lawrence, a senior researcher at Which?, previously explained: “Draughtproofing is the cheapest and easiest DIY fix and can typically save around £35-£50 a year on energy bills.
“But it’s not just about savings; draughts make you feel chilly, so eliminating them will make your home feel more comfortable at a lower temperature (and you won’t need to pile on the blankets).”
Which? encourages Brits to use its Home Energy Planning Service to work out what options are best for them.
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