{"id":235297,"date":"2026-07-01T02:01:42","date_gmt":"2026-07-01T02:01:42","guid":{"rendered":"https:\/\/teknomers.com\/en\/amidst-an-extreme-heat-wave-the-french-have-begun-painting-their-windows-with-white-chalk-it-makes-perfect-sense\/"},"modified":"2026-07-01T02:01:42","modified_gmt":"2026-07-01T02:01:42","slug":"amidst-an-extreme-heat-wave-the-french-have-begun-painting-their-windows-with-white-chalk-it-makes-perfect-sense","status":"publish","type":"post","link":"https:\/\/teknomers.com\/en\/amidst-an-extreme-heat-wave-the-french-have-begun-painting-their-windows-with-white-chalk-it-makes-perfect-sense\/","title":{"rendered":"Amidst an Extreme Heat Wave, the French Have Begun Painting Their Windows with White Chalk \u2013 It Makes Perfect Sense"},"content":{"rendered":"\n
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As 2026 unfolds, France finds itself grappling with extreme heat waves, and in a surprising twist, many residents are turning to a time-tested yet simple solution: painting their windows with white chalk. While modern conveniences like air conditioning and advanced reflective paints exist, the appeal of this straightforward method lies in its accessibility and effectiveness.<\/p>\n

What is Blanc de Meudon?<\/h2>\n

The chalk being utilized is known as blanc de Meudon<\/em><\/a>, a calcareous clay sourced from the quarries in Meudon, near Paris. Its popularity has surged so dramatically that many hardware stores are experiencing shortages due to increased demand.<\/p>\n

The Heat Challenge<\/h3>\n

As temperatures in Paris soar past 40\u00baC, residents are seeking solutions to combat the heat. While purchasing air conditioners and fans is the logical step for many, a surprising alternative is the increasing interest in blanc de Meudon<\/em>. This inexpensive powder, primarily composed of calcium carbonate, is becoming a go-to choice for cooling homes during sweltering summer days.<\/p>\n

A New Craze<\/h2>\n

The popularity of blanc de Meudon<\/em> has led to some amusing comparisons to the panic buying of toilet paper experienced during the pandemic. Reports indicate that local hardware stores are running out of stock, and individuals are traveling to different towns to find supplies. A consumer named Philippe shared his frustration stating, “My wife went to all the DIY stores in Auray and couldn’t find it.”<\/p>\n

Why the Trend?<\/h3>\n
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@daphneblt<\/a> <\/p>\n

This simple solution is not only effective but has also sparked a social media craze as users share tips for mixing and applying chalk to their windows. The method involves mixing one part chalk with one part water, creating a liquid that can be applied directly to the glass. While aesthetics may be sacrificed, many users report a noticeable drop in indoor temperatures.<\/p>\n

\u266c are original – daphneblt<\/a> <\/section>\n<\/blockquote><\/div>\n<\/div>\n

How Effective is it?<\/h2>\n

The effectiveness of chalk as a cooling agent is rooted in basic science. White surfaces are well-known to reflect sunlight and heat. Research indicates that traditional paints can reduce indoor temperatures by around 1.7\u00baC. Some studies suggest that optimal white surfaces could potentially lower temperatures by as much as 7.5\u00baC.<\/p>\n

The Science Behind Blanc de Meudon<\/h3>\n

Chalk, primarily composed of calcium carbonate (CaCO3), shows minimal absorption of sunlight and UV radiation. According to Purdue researcher Xiangyu Li, its reflective properties make it an ideal choice for combating heat indoors.<\/p>\n

Conclusion<\/h2>\n

In a time when climate change is becoming increasingly tangible, innovative solutions like using blanc de Meudon<\/em> provide a creative yet practical approach to tackling the heat. While it may not replace air conditioning entirely, this affordable option has proven to be a beneficial addition to the toolkit for surviving the summer’s most intense heat. As residents continue to adapt and seek ways to stay cool, painting windows with chalk is both a nostalgic nod to simpler times and a forward-thinking strategy to mitigate climate challenges.<\/p>\n

Images | Laura Chouette (Unsplash)<\/a>, M\u00f4sieur J. (Flickr)<\/a><\/p>\n<\/div>\n


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General News – 2<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

As 2026 unfolds, France finds itself grappling with extreme heat waves, and in a surprising twist, many residents are turning to a time-tested yet simple solution: painting their windows with white chalk. While modern conveniences like air conditioning and advanced reflective paints exist, the appeal of this straightforward method lies in its accessibility and effectiveness. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36399],"tags":[22363,40464,2314,3543,2120,2789,7277,4436,2121,1958,15113],"class_list":["post-235297","post","type-post","status-publish","format-standard","hentry","category-technology","tag-begun","tag-chalk","tag-extreme","tag-french","tag-heat","tag-painting","tag-perfect","tag-sense","tag-wave","tag-white","tag-windows"],"_links":{"self":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/235297","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/comments?post=235297"}],"version-history":[{"count":0,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/posts\/235297\/revisions"}],"wp:attachment":[{"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/media?parent=235297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/categories?post=235297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/teknomers.com\/en\/wp-json\/wp\/v2\/tags?post=235297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}