As the UK faces another winter of high energy costs, Octopus Energy is urging households to adopt a simple daily routine, famously endorsed by Money Saving Expert Martin Lewis, to keep homes warmer for less.
The Simple '4pm Rule' Explained
The strategy, often called the '4pm rule', is straightforward yet highly effective. Octopus Energy advises closing your curtains or blinds before it gets dark, ideally around 4pm, to trap warmth inside your home. The energy supplier states this simple action can lead to a reduction in heat loss by up to 17%.
Martin Lewis first highlighted this 'tactical curtains' tip on his ITV show, and his team confirms the advice remains just as relevant today amidst the ongoing cost of living pressures. The principle is to harness free heat from the sun during the day and then rigorously insulate against the cold as night falls.
Maximising Your Home's Warmth
To get the most out of this method, follow these steps. During daylight hours, keep curtains open to allow the sun's rays to naturally heat your rooms. Once the sun sets—which can be as early as 3:45pm in mid-November—promptly close all curtains and blinds. Closing curtains in front of external doors provides an extra barrier against drafts.
For enhanced insulation, consider thickening your existing curtains. Octopus Energy suggests adding a cheap curtain liner or even a shower curtain behind your main curtains during the colder months. This creates an additional layer of trapped air, slowing down heat escape.
Choosing the Right Curtains for the Job
While any curtain is better than none, some types are far more effective at retaining heat. Thermal-lined curtains made from heavy fabrics like velvet, suede, or wool blends are considered the best for the job. The secret lies in the specialised lining, which often features multiple layers of fabric, sometimes with foam, to act as a powerful insulator.
For optimal performance, ensure your curtains are well-fitted. They should extend a few inches beyond the window frame on all sides and reach down to the floor. Installing a pelmet or valance at the top of the curtain rail can also prevent warm air from escaping over the top, sealing in the precious heat you've worked to keep.
