Placing aluminium foil on windows: How this simple home trick works, its benefits and the right way to use it to keep rooms cooler in summers

When sunlight hits your windows for several hours, indoor temperatures can rise quickly, particularly in rooms that receive direct afternoon sun. While air conditioning can provide relief, running it for long periods can increase electricity consumption.

A simple, low-cost alternative that has gained attention is covering windows with aluminium foil. The shiny surface of the foil reflects a portion of the sun’s radiation, potentially reducing the amount of heat entering the room.