Most people think about their curtains and blinds in winter, when keeping warmth in feels like the obvious priority. But the right window treatments matter just as much in summer. If you’ve ever sat in a living room that feels unbearably stuffy by three o’clock, or struggled to sleep in a bedroom that just won’t cool down, your windows are probably a big part of the problem.
The good news is that the fix is often simpler than people expect.
Heat and Light Are Not the Same Thing
This is probably the most useful thing to understand before making any decisions. A lot of people assume that if light is getting into a room, heat must be getting in too, and that blocking one means blocking the other. It doesn’t quite work like that.
You can have a bright, well-lit room that stays relatively cool, and a darker room that still feels like an oven. What matters is how your window treatments handle solar heat gain, which is the warmth that builds up when sunlight hits glass and surfaces inside the room. The right fabric, colour and fitting can significantly reduce how much of that heat makes it through, without necessarily making the room dark and gloomy.
Blinds: Closer to the Glass, the Better
One of the most effective things a blind can do in summer is sit close to the window. When a blind is fitted within the window recess, right up against the glass, it traps a layer of air between itself and the window. That air acts as a buffer, slowing down how quickly heat transfers into the room.
Roller blinds work particularly well for this. In a heat-reflecting or blackout fabric they can make a noticeable difference to room temperature, especially in south or west facing rooms that take the full force of afternoon sun. Lighter coloured fabrics tend to perform better here as they reflect more heat back out rather than absorbing it.
Roman blinds are another strong option. They look smart in almost any room and come in a wide range of fabrics, including options with thermal properties that work just as well in summer as they do in winter.
Curtains: Colour and Lining Matter More Than You Think
If you prefer curtains, the two things that make the biggest difference in summer are colour and lining.
Lighter colours reflect heat rather than drawing it in. A heavy dark curtain might feel cosy in January but it will absorb heat all afternoon in July and release it back into the room for hours afterwards. Switching to something in a soft white, cream or light neutral can genuinely change how a room feels on a warm day.
Thermal linings are worth considering too. They’re mostly associated with keeping warmth in during winter, but they work the other way around as well, slowing the transfer of heat from outside in. If you’re having curtains made, it’s worth asking about lining options rather than treating it as an afterthought.
For rooms with south or west facing windows, keeping curtains at least partially closed during the hottest part of the afternoon makes a real difference. It feels counterintuitive when the sun is bright and inviting, but even a couple of hours with the curtains drawn during peak heat can keep a room noticeably cooler into the evening.
Room by Room
Bedrooms are where summer heat tends to cause the most frustration. A room that holds heat through the night makes for poor sleep, and the problem often starts during the day when sunlight heats the room up for hours before you go to bed. A blackout blind or a lined curtain in a light colour, kept closed during the afternoon, can make a real difference by the time evening comes around.
Living rooms with large windows or patio doors lose a lot of their cooling potential through the glass. Wide expanses of glazing are beautiful but they let in a lot of solar heat on sunny days. Layering a blind with curtains either side gives you flexibility to adjust throughout the day depending on where the sun is.
Conservatories are in a category of their own. Without proper window coverings they become unusable for a good chunk of summer. Specialist blinds designed for conservatory roofs and angled windows can make an enormous difference, turning a space that gets abandoned in July into somewhere you can actually enjoy.
Keeping It Bright Without the Heat
Blocking heat doesn’t have to mean sitting in a dim room all summer. Sheer and voile curtains are worth considering in rooms where you want plenty of natural light but not the full force of direct sun. They soften and diffuse the light coming through rather than cutting it out entirely, and paired with a blind for when you need more control, they give you a lot of flexibility throughout the day.
The layered approach works especially well for rooms that get used at all hours. A sheer curtain lets morning light in gently, and as the afternoon heats up you can close the blind behind it without the room feeling dark or shut off.
A Couple of Practical Things to Bear in Mind
It’s worth thinking about which direction your windows face before deciding on treatments. North facing rooms rarely overheat and need very different solutions to a south facing bedroom that gets sun from mid-morning onwards. If you’re not sure, just pay attention to where the sun hits during a warm day and work from there.
Window treatments also work best as part of a daily routine rather than something you fit and forget. Opening windows in the evening to let cool air through and closing blinds or curtains during the hottest afternoon hours will do more than any single product on its own.
If your home struggles in the heat and you’re not sure where to start, come and have a chat with us. We can help you figure out what would make the most difference, whether that’s new blinds, curtains or a combination of both. Pop into the showroom or give us a call and we’ll point you in the right direction.