Innovative Solution to Heatwave: Painting Windows White

The record-breaking heatwaves in France have led citizens to adopt a creative method to keep their homes cool.A special chalk powder known as 'Blanc de Meudon' is mixed with water to paint the exterior of windows white. This method helps to reflect sunlight and contributes to keeping the interior spaces cool.Experts explain that the scientific principle behind this method is the natural ability of white surfaces to reflect rather than absorb solar radiation. The high reflectivity of calcium carbonate enables it to block a significant amount of the sun's ultraviolet and infrared rays.As a result of this method, there is a noticeable decrease in indoor temperatures, providing a low-cost alternative to air conditioning.Additionally, some homeowners are covering their windows with aluminum foil to protect themselves from the heat.This practice, which is becoming increasingly popular in France, bears a resemblance to the traditional culture of whitewashed houses in Southern Europe.