Whether you’re in Cardiff or Carmarthen, these summer scorchers are getting more intense—and more common. Here are five top tips to help your home stay cool and comfortable when the mercury’s climbing:
1. Block the Sun Before It Bakes Your Rooms
Close your curtains and blinds—especially on south and west-facing windows—during the hottest part of the day.
You’d be surprised how much direct sunlight heats a room. Blackout or thermal curtains can make a massive difference, and reflective or foil-lined blinds are even better. If you’re lucky enough to have shutters or external awnings, use them. Keeping the sun out in the first place is far more effective than trying to cool things down afterwards.
2. Create a Cross-Breeze Like Your Nan Used To
Open windows strategically in the cooler parts of the day—early morning and late evening.
Get air moving by opening windows on opposite sides of the house. It doesn’t need to be a gale, just a steady flow. Pop a bowl of ice in front of a fan to create a homemade cooling system (yes, it really works). And if your loft has a hatch, crack it open to let hot air rise out the top.
3. Insulation Isn’t Just for Winter
Good insulation keeps your home cooler in summer and warmer in winter.
Loft insulation, cavity wall insulation, and even proper draught-proofing help stabilise indoor temperatures. Think of your house like a flask—it works both ways. If your insulation’s past its best or was never done properly, upgrading it could keep you cooler now and save you money year-round.
4. Avoid the Oven (Literally and Figuratively)
Limit the use of heat-producing appliances during the hottest hours.
That means the oven, hob, tumble dryer, even the iron (not that many of us are pressing our shorts in July). Try cold meals, microwave cooking, or BBQs outside. And if you’re working from home, switch your laptop off when you’re not using it—electronics kick out more heat than you’d think.
5. Consider Long-Term Cooling Investments
If you own your home, it might be time to look at air source heat pumps or split-unit air conditioning.
They’re no longer just for Marbella villas. With energy-efficient models now eligible for government grants and low-interest green loans, you can cool your home in summer and heat it efficiently in winter. Combine this with solar panels and you could have a much cooler home and a lower energy bill. Win-win.
The truth is, we never used to worry too much about heat in South Wales. But the climate is changing, and our homes—many of them built to trap warmth—aren’t always designed for modern weather extremes. These tips are a good starting point, but if you’re thinking about improving your home’s resilience more permanently, it’s worth chatting with someone who understands the local housing stock and financing options.
Feel free to give me a shout if you’d like help exploring funding, grants, or mortgage options to make it all a bit more affordable.
Take care, keep cool,
Ian
C A Mortgage Services of South Wales
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