The Energy Saving Trust has outlined three longer-term changes households can make to reduce overheating and keep homes cooler next summer. The recommendations focus on improving insulation, reducing heat loss through sun-facing windows, and installing home cooling systems.
Insulation and Solar Film
First on the list is topping up insulation. The Trust says insulation works much like a flask, slowing the movement of heat. That means it can help keep warmth in during winter and also limit how quickly homes heat up in summer. Costs can vary widely depending on the type of insulation and the home itself, with options including loft or roof insulation as well as wall and floor measures.
The second change is adding solar film to windows. The Energy Saving Trust says a film applied to glass can cut the warming impact of sunlight coming through the window. It adds that homeowners don’t necessarily have to do every window to see a benefit — for a cheaper approach, it suggests prioritising areas that get the strongest sun, such as south-facing windows or rooms that regularly feel hottest.
Air-to-Air Heat Pumps
The third option is getting an air-to-air heat pump, which the Trust describes as a type of air-conditioning unit that can provide heating in winter and cooling in summer. It says these systems are more common in other parts of Europe than in the UK, but could become a more familiar sight as heatwaves become more frequent and summers trend hotter.
Practical Steps for Hot Spells
For anyone not ready to take on bigger upgrades, the Trust also repeats some practical steps that can help during hot spells. It advises keeping windows and curtains closed during the day to block out heat, then opening windows when the air outside is cooler. Sticking to shaded rooms where possible and avoiding using the oven can also make a noticeable difference.
Some people might also use electric fans. The NHS says: "Keep your living space cool. Close windows, curtains and blinds during the day and open them at night when the temperature outside has gone down. Electric fans can help if the temperature is below 35 degrees."
