As soon as the temperature drops, the same question comes back: how to keep your house warm without the bill going through the roof. The answer is rarely turning the thermostat up. Before that, it pays to block the routes the heat you're already paying for escapes through, and there insulating your windows from the cold and sealing four draughts changes how warm the place feels more than two extra degrees on the radiator. These are the measures you genuinely notice, from the cheapest to the most ambitious.
Where the heat escapes from your home
Keeping your house warm starts with knowing where you're losing it. In an average flat, the leaks are almost always in the same places:
- Window and balcony door frames, especially if they're old or aluminium without a thermal break.
- The roller shutter box, one of the great forgotten spots: it's a cavity that opens almost directly to the outside.
- The gap under the front door and under the doors of rooms that back onto cold spaces.
- Hard floors with no rugs, and walls facing a courtyard or the north side of the building.
To find them, run your hand around the edge of the windows and the door on a windy day. If you'd rather see it, hold a lit candle nearby: wherever the flame leans, there's a draught. Note them all down before you buy anything.
How to insulate windows from the cold
This is the job with the best cost-to-result ratio.
- Self-adhesive draught strips in foam or rubber on the frame. Clean and dry the surface before sticking them on, or they'll peel off within two weeks.
- Filler or silicone in the joints between the frame and the wall if you can feel air there.
- Roller shutter box: open it up and fit adhesive insulation panels inside, taking care not to rub against the strap or the roller.
- Clear insulating film for windows, which creates an air pocket without cutting out light. It's a temporary fix, but an effective one in very cold rooms.
- Thick or lined curtains: open them during the day to let the sun in, and close them the moment it gets dark.
One warning: sealing improves insulation, but it also cuts natural ventilation, so indoor humidity rises. If you're already seeing droplets on the glass in the morning, have a look at this guide on condensation on windows.
How to save on heating with the radiators you already have
The kit doesn't change; what changes is how you use it.
- Bleed the radiators at the start of the season. If the top stays cold, there's air inside and you're only heating at half power.
- Don't block them. A sofa in front, a long curtain over the top or a shelf sitting right above all stop convection and waste a good share of the heat.
- Fit a reflective panel between the radiator and the wall, especially if that wall is an external one. It takes five minutes.
- Set the thermostat properly. Between 19 and 21 °C during the day and around 17 °C at night is plenty in a home where you're dressed for winter. Every extra degree adds roughly 7 % to consumption.
- Close off rooms you don't use and turn their valves down, instead of heating the whole house evenly.
Textiles: the cheapest trick for feeling warm
Comfort doesn't depend on air temperature alone, but on the surfaces around you. A tiled floor at 16 °C draws the heat out of your feet even if the thermometer reads 21 °C.
- Rugs in the walkways and under the living room table.
- Blankets within reach on the sofa and at the foot of the bed.
- Winter bedding: flannel or heavy cotton instead of summer sheets.
- Cushions and heavy textiles, which also bring in the snug feel of the cocooning style.
Ventilating without chilling the house
Leaving a window ajar all morning cools down walls and furniture, and warming them back up takes a long time. Short, intense cross-ventilation works far better:
- Open windows on opposite sides for 5 to 10 minutes a day, with the heating off.
- Ventilate the bathroom after your shower and the kitchen while you cook.
- Keep relative humidity between 40 % and 60 %: very dry air makes you feel colder and irritates your throat.
Fresh air heats up quickly; cold walls don't. That's why you want a short burst and plenty of airflow.
Summary: how to keep your house warm, step by step
| Leak or problem | Solution | Effort |
|---|---|---|
| Draught around the window | Adhesive draught strips | Low |
| Cold from the shutter box | Adhesive insulation inside | Medium |
| Draught under the door | Draught strip or door snake | Low |
| Radiator lukewarm at the top | Bleed it | Low |
| Cold floor | Rugs | Low |
| Dripping windows | Ventilate daily and keep an eye on humidity | Low |
Two afternoons of work will seal the things that matter, and keeping the house warm stops depending on the thermostat: you feel the difference in comfort and see it on the bill. If you want to finish the job with textiles and accessories that make the house warmer this winter, take a look at the Velia Select home range.