Heatwaves in the UK are a nightmare. Most of us lack AC. We have no fans. When the mercury climbs, there is literally nowhere to hide.
I got lucky with my home design, but I stay hyper-aware. One slip-up and the place turns into an oven.
When my partner and I swapped our modest single back door for a wide-set of patio doors leading to the courtyard, I had reservations. Big ones. These doors face west. That means afternoon light. Early evening sun. That is exactly what you want to avoid if you hate sweating. The glare would hammer straight into our open-plan kitchen. It was a risk. A bad one, arguably.
So we got smart. We deployed two simple tricks to stop the heat from invading.
Let Nature Do The Work
We already had plants. Good ones.
The old door had been flanked by two established climbers. Wisteria on one side. Clematis on the other. In spring they drop petals. In autumn they go dormant. But from February through November? They are a wall of leaves. Dense shade. Continuous coverage.
When we tore the wall down for those new double doors, I told the plants: go wild.
Sure, we prune. We pin them back a bit. But I am not a control freak here. I like the bushy mess. Because of that growth, the sun barely touches the glass. It might hit for an hour or so before another branch swings in to block it. Shade relief comes in waves.
Trees actually drop the air temperature around them. So when the doors are cracked open, you’re pulling in cool air. Not the baking asphalt variety.
Age matters though. My wisteria is ancient. Twenty years young at least. That’s why it explodes with flowers twice a year. The clematis? Fifteen. Woody branches thick as your wrist. They aren’t new recruits. Young plants won’t give you this wall of protection. Clematis spends its youth growing roots, not height.
If you’re starting from scratch, grab fast-growing climbers. But you can’t fake time. Not easily.
The Sail Shade Strategy
The plants are champions. But they aren’t perfect.
There is a window—a brief, cruel hour—where the sun slips through the greenery. To kill that gap, we added a sail shade. Not a normal umbrella. Umbrellas fail when the sun is overhead. You end up chasing your shadow all afternoon. Frustrating work.
This sail design stays put. It blocks the late afternoon glare that tries to sneak past the clematis and the wisteria. It’s easy to take down when the threat passes.
We’ve talked about going permanent. A pergola.
‘I’d suggest a freestanding pergola with adjustable louvred roofs. You get shade and sun control. Add side screens to block low-angle rays,’ says Rob Mead, buying director at The White Company.
A flat roof extension might make sense too.
External overhangs? Yes. Heat pumps that can reverse cool? Also yes. Stone floors for thermal mass? Smart. Zaeem Chaudhry of AC Design Solutions puts it bluntly. ‘Deciduous planting on south and west aspects provides shade in summer. Sun in winter. Simple interventions that change everything.’
Why British Homes Are Basically Greenhouses
Here is the harsh truth. British housing is terrible for summer.
The last fifty years of building have focused on one thing. Keeping heat in. We built boxes. Small rooms. Tiny windows. Minimal air circulation. Great for January. Disastrous for August.
‘British homes aren’t bad at heat management. They are just built exclusively for winter,’ Ali Mujtuba from Historic England points out.
For generations, the goal was thermal retention. Thick brick. Heavy insulation. Airtight envelopes. Nothing gets out. The problem? During a summer spike, that same house becomes a massive thermal battery. It eats the solar radiation. It holds it. Then it slowly radiates it back at you. Long after sunset.
The game plan? Block the entry.
Keep curtains closed all day. Open everything up at night. It sounds counter-intuitive. But it works.
We have fallen in love with extensions lately. Massive glazed walls. Light flooding in. Beautiful. For 360 days of the year, it’s lovely. For the other 5? It’s a trap.
‘Southern European homes have external shutters. We rarely see those in the UK. They block UV before it even hits the glass,’ notes Chloe Burrows from Laura James Homes.
Instead, we leave the sun beating through bare glass. The short-wave radiation enters. Hits the sofa. The floor. The cat. It converts into long-wave infrared heat. Then? It gets trapped.
Why do you think it’s hotter inside your car parked in the driveway? Same principle. You are living in the trunk.
