How to Keep Your House Cool in the Summer

Keeping your house cool in summer can feel like a losing battle, especially when a heatwave rolls in and your flat turns into a sauna. The good news? You don’t need air con to survive. With the right strategies, you can keep your home comfortable all summer long, without cranking up the energy bills.

1. Block the sun before it blocks you

Windows are your home’s biggest heat trap. Close curtains, blinds, or shutters on sun-facing windows during the day, particularly south-facing ones, which take the brunt of it.

Better yet, invest in thermal blinds or solar control window film. They’re designed to reflect heat while still letting light through. It’s one of the simplest changes you can make, and one of the most effective.

Pro tip: Light-coloured curtains reflect more heat than dark ones. Small detail, big difference.

2. Master the art of cross ventilation

Good airflow is everything. The trick is to work with the temperature, not against it.

During the day, keep windows closed to trap the cool air inside. At night, throw them open. Create a cross breeze by opening windows on opposite sides of your home so cool air flows in and warm air flows out.

If you’ve got a two-storey home, open a window downstairs and one upstairs. Hot air rises, so this helps draw it up and out.

3. Shade your home from the outside in

External shading stops heat before it even gets through the glass. Awnings, external shutters, and pergolas are all worth considering if you’re doing any home improvements this year.

Don’t want to commit to a big project? Plants do the job brilliantly. Tall shrubs alongside sun-facing walls, climbing plants over a pergola, or even a well-placed garden umbrella can reduce the temperature around and inside your home.

Bonus: it makes your garden look lovely too.

4. Give your appliances a summer holiday

Your oven, tumble dryer, and even your laptop all give off heat when they’re running. On a scorching day, that adds up fast.

Swap hot meals for salads, wraps, or a BBQ outside. Air-dry your laundry instead of using the dryer. Switch off electronics at the plug when you’re not using them, as standby mode still generates heat.

Even switching from old incandescent bulbs to LEDs makes a small but meaningful difference to your home’s temperature.

5. Don’t overlook your insulation

Loft insulation isn’t just for keeping warm in winter, it works both ways. A properly insulated roof slows heat transfer, keeping things cooler downstairs when the sun is beating down on your tiles.

Check your doors and windows are properly sealed too. Gaps let warm air creep in and cool air escape. Draught-proofing strips are cheap, easy to fit, and make a noticeable difference.

Double glazing? Even better. It regulates temperature year-round, which is exactly what you want.

6. Use fans smarter, not harder

A fan on its own moves air around, helpful, but not always enough. Here’s how to get more out of yours:

• Point a box fan outward in a window to push hot air out of the room
• Use fans alongside open windows at night to accelerate cross ventilation
• For a quick cool-down: place a shallow bowl of ice in front of a desk fan. It won’t rival air con, but it takes the edge off on a really brutal day

The goal is airflow, not just air movement. Think about where the air is going, not just where it’s coming from.

7. Rethink your garden as a cooling tool

Your outdoor space can do a lot of the heavy lifting when it comes to keeping your home cool. Trees planted to shade your roof or walls reduce the amount of heat absorbed by your home’s structure.

Grass and plants also cool the air around them through a process called evapotranspiration, which means they release moisture as they grow, lowering the ambient temperature. Hard paving and decking, on the other hand, absorbs and radiates heat.

It’s a long game, but if you’re planning any garden work this year, it’s worth thinking about shading and greenery with summer comfort in mind.

8. Set your bedroom up for a cooler night’s sleep

Hot nights are the worst. Getting your bedroom right makes a real difference to how well you sleep and how you feel the next day.

During the day, keep bedroom curtains closed to stop heat building up. At bedtime, swap your duvet for lightweight cotton sheets and crack the window if it’s cooler outside.

Struggling to drift off? Try a cool shower before bed, or run your sheets and pillowcase under cold water and wring them out. They’ll dry quickly and keep you cool as they do.

If your bedroom is the hottest room in the house, it’s worth considering whether moving your sleeping setup temporarily, even to a ground-floor room, might actually get you a better night’s kip.

Before we go

You don’t need a £3,000 air conditioning unit to get through a British summer in one piece. A few smart tweaks (some free, some cheap, some worth saving up for) can make your home genuinely comfortable, even when it’s sweltering outside.

And while you’re thinking about your home, it’s worth making sure your cover is sorted too. Lemonade’s home insurance is straightforward, fairly priced, and takes minutes to set up. One less thing to worry about, whatever the weather throws at you.