Do thermal curtains keep heat out in the summer? Experts reveal whether these window dressings are worth buying

A dining room with glass doors opening onto a patio half covered with a grey curtain.

As we find ourselves at the beginning of summer with the first (but certainly not the last) heatwave of the season behind us, we’re pondering how to best keep our homes - and by extension ourselves - cool and less bothered in the coming months. And while thermal curtains are traditionally associated with keeping the heat in during the winter months, we can’t help but wonder – do thermal curtains keep heat out too?

This specialised window treatment idea is specially designed with built-in layers and/or linings to prevent heat from escaping your home when it’s cold outside, which in turn helps to keep energy bills down - a benefit that’s particularly appreciated amid the energy and cost-of-living crises.