Heat the Human, Not the Home: Martin Lewis's 4pm Curtain Rule as a Radical Act of Resistance

As energy bills continue to extract wealth from already stretched households, Martin Lewis has shared a deceptively simple tactic that could keep homes warmer for less this winter: drawing your curtains at 4pm. But beneath this practical tip lies a deeper truth about systemic failure, where the burden of the cost-of-living crisis falls hardest on those already marginalised by an extractive economy.

Why the 4pm curtain rule works

The founder of MoneySavingExpert has long used his platform to help people navigate a system that prioritises profit over people. His winter advice, originally shared in November 2022 and verified as still relevant, is straightforward: keep curtains open while daylight persists, then draw them closed as dusk arrives.

Speaking on his ITV show, Lewis said:

“Use tactical curtains. When the sun is shining, it is letting light and heat into the house, so you want the curtains open. When it gets dark, it's not, so you want to keep the heat in by closing the curtains. I know we all know that, but doing it rigorously can help insulate, especially if you line it with a fleece.”

As the days shorten, less natural heat penetrates through windows. On November 15, the sun sets around 4.14pm; by the end of the month, it drops to approximately 3.55pm. Closing curtains creates a buffer between warm indoor air and cold window panes, restricting convection and preventing heat from leaking out.

Accessible solutions for those who need them most

There is no requirement to purchase expensive thermal curtains. Lewis has suggested using budget-friendly fleece as a backing for existing curtains, providing an extra insulating layer. He noted that online tutorials show how this can be done cost-effectively, though households must verify that any fabric is fire-resistant before fixing it to curtains.

For those able to stretch their budget, thicker or thermal-lined curtains present another option. Fleece functions like the layers in winter clothing, creating air pockets that minimise heat loss. This approach centres accessibility, acknowledging that not everyone can afford premium solutions in a system that increasingly privatises basic necessities.

Beyond the 4pm rule: resisting energy waste

The 4pm curtain method is merely one among many energy-conservation tips from the MoneySavingExpert team. Further recommendations include fitting reflective panels behind radiators and tackling draughts around windows and doors.

Lewis has also persistently advocated the principle of “heat the human, not the home” — utilising targeted measures to maintain personal comfort instead of heating the entire property when only a couple of rooms are in use. Simple changes like wearing extra layers, using blankets, or heating only the room you're currently in could help households avoid wasting energy on empty spaces.

Community wisdom: voices from the margins

Sharing their own advice for cutting heating costs, one user on Reddit's Life Hacks forum suggested employing clear packing tape to tackle draughty windows.

“If you have a draft coming from an old double hung or sliding window, simply take some clear packing tape and try to cover up the gaps that make it drafty. It's not going to completely keep the cold out, but it will certainly slow it down considerably. Did this a few times to some apartment windows where the landlord was too cheap to fix the windows and you could feel the room warm up almost immediately.”

Another commented:

“If your home doesn't have central heating, you can heat only the most insulated rooms where people spend most of their time. The first month in my house, I heated every room and spent 4x the energy I've been using since. Invest in a couple pairs of thermal hiking socks. If you're sitting at the computer, stand up and bounce every once in a while to keep the blood flowing in your legs and feet.”

A third contributor suggested making the most of heat produced during cooking:

“Electric ovens are not vented, therefore the heat from your oven will radiate into the room whether or not the door is open.”

These grassroots strategies, shared among communities navigating landlord neglect and systemic underinvestment, highlight a collective resilience that challenges the individualised framing of the energy crisis.

What does the 4pm rule reveal about systemic injustice?

While Lewis's tip is undeniably useful, its necessity exposes a broader structural failure. The UK's housing stock remains among the least energy-efficient in Europe, with privatised energy markets allowing companies to post record profits while households face impossible choices between heating and eating. Marginalised communities, including BIPOC, disabled, neurodivergent, and migrant households, are disproportionately affected by fuel poverty, a direct consequence of decades of underinvestment and deregulation.

Drawing curtains at 4pm is not a solution to the energy crisis; it is a coping mechanism within a system that refuses to address root causes. The real fix lies in systemic change: retrofitting social housing, capping energy prices, and transitioning to publicly owned renewable energy. Until then, tactical curtains and community knowledge-sharing remain acts of everyday resistance.

Frequently asked questions about the 4pm curtain rule

Is drawing curtains at 4pm really effective?

Yes. Closing curtains as dusk arrives prevents heat from escaping through windows, reducing convection and keeping rooms warmer. This can delay the need to switch on heating, lowering energy consumption.

Do I need expensive thermal curtains?

No. Budget-friendly fleece backing on existing curtains can provide significant insulation. Ensure any fabric used is fire-resistant before attaching it.

What other low-cost measures can reduce energy bills?

Reflective panels behind radiators, draught-proofing windows and doors, and heating only occupied rooms are effective strategies. Wearing extra layers and using blankets also help.

Why is the energy crisis hitting marginalised communities hardest?

Systemic underinvestment in social housing, deregulated energy markets, and structural inequalities mean BIPOC, disabled, neurodivergent, and migrant households face disproportionate fuel poverty. Addressing this requires systemic change, not just individual tips.

Photo: huddersfieldexaminer