Blinds York · Heat Control Guide
Why Your House Is Overheating — And the Blinds That Actually Fix It
Most UK homes overheat because of solar gain through glass — not airflow. Here's what actually works.
Every summer, the same thing happens. You open the windows. You point a fan at yourself. You complain that it's hotter inside than out. And nothing actually changes.
The reason is simple: the heat isn't coming in through the air — it's coming in through your glass. Solar radiation passes straight through windows and heats up your floors, furniture, and walls. By the time you feel it, the heat is already inside. Opening a window just lets more warm air in.
The fix isn't reactive — it's proactive. You need to stop the heat before it gets through the glass.
Why fans and open windows don't fix it
❌ Fans
Move hot air around. They don't cool the room — they just create airflow. Once the ambient temperature rises above body temperature, fans make you hotter.
❌ Open windows
Only help if outside air is cooler than inside. On a sunny day, you're often letting warm air in and trapping solar-heated air inside.
❌ Closing curtains
Fabric curtains trap heat between the glass and the curtain. The room can actually get hotter because the heat has nowhere to go.
❌ Doing nothing
Glass has almost no insulating value. South and west-facing windows can raise room temperature by 8–10°C on a clear summer day.
The real cause: solar gain through glass
Solar gain is the increase in temperature caused by sunlight entering through windows. In the UK, south and west-facing rooms are the worst affected — especially between 11am and 5pm in summer.
The solution is to intercept the solar radiation before it passes through the glass — or at least before it heats up the room. That's where the right blinds make a real difference.
The blinds that actually reduce heat
✅ Thermal Roller Blinds
A good thermal roller blind with a reflective backing bounces solar radiation away before it heats the room. They're one of the most cost-effective options for south and west-facing windows. Available in blackout and light-filtering versions.
See Roller Blinds →✅ Venetian Blinds (Wood or Aluminium)
Adjustable slats let you redirect sunlight upward toward the ceiling rather than into the room. You keep the light without the direct heat. Aluminium venetians with a reflective finish are particularly effective.
Ask about Venetians →✅ Day & Night (Vision) Blinds
The alternating sheer and blackout bands let you control exactly how much direct sunlight enters. In summer, you can block direct rays while keeping the room bright. A practical middle ground between full blackout and no coverage.
See Vision Blinds →✅ Perfect Fit Blinds for Conservatories
Conservatories are notorious heat traps. Perfect Fit blinds sit directly in the frame and can dramatically reduce solar gain. Combined with a thermal fabric, they make conservatories usable in summer again.
See Perfect Fit Blinds →Quick checklist: is your window setup making things worse?
- ✗South or west-facing windows with no blinds or only thin curtains
- ✗Conservatory with no blinds — especially roof blinds
- ✗Roller blinds with no thermal or reflective backing
- ✗Fabric curtains that trap heat between glass and fabric
- ✗Large windows in a home office or bedroom that face afternoon sun
If any of these apply, the right blinds will make a noticeable difference — not just in summer, but in winter too (thermal blinds reduce heat loss as well).
FAQ
Do blinds actually keep a room cooler?
Yes — the right blinds can reduce solar gain significantly. A thermal roller blind with a reflective backing can cut the heat entering a room by 40–60% compared to no covering at all.
What's the best blind for a south-facing room?
A thermal roller blind with a reflective or blackout lining is the most effective. Venetian blinds (wood or aluminium) are also good because you can angle the slats to redirect sunlight.
Are blackout blinds good for heat?
Blackout blinds block light but not necessarily heat — it depends on the fabric and backing. Look for a thermal or reflective lining specifically. We'll advise on the right option when we measure up.
What about conservatories?
Conservatories need blinds that fit properly — gaps let heat in. Perfect Fit blinds are ideal because they sit directly in the frame with no gaps. For roof panels, specialist conservatory roof blinds make a big difference.
Can you fit blinds in York for heat control?
Yes. We measure, supply and fit blinds across York. Call us on 01904 379271 or send a photo of your windows and we'll recommend the best option for your situation.
Ready to sort your overheating rooms?
We measure, supply and fit blinds across York. Send us a photo of your windows for a fast quote — or give us a ring.