{"id":4488,"date":"2025-09-25T14:28:39","date_gmt":"2025-09-25T14:28:39","guid":{"rendered":"https:\/\/arcora.com\/le-reemploi-de-la-pierre-mince-en-facade\/"},"modified":"2025-11-21T12:06:22","modified_gmt":"2025-11-21T12:06:22","slug":"le-reemploi-de-la-pierre-mince-en-facade","status":"publish","type":"post","link":"https:\/\/arcora.com\/en\/le-reemploi-de-la-pierre-mince-en-facade\/","title":{"rendered":"Reusing Thin Stone in Fa\u00e7ades"},"content":{"rendered":"

Reusing thin stone from urban fa\u00e7ades means combining heritage with environmental performance. Thanks to its durability and low carbon footprint, stone becomes a powerful lever for the circular economy. But be warned: the location of the machining process is decisive. Stone reused nearby can be 6 times less polluting than stone reused 1,500 km away!<\/p>\n

Tools like ecale.io or the Booster du R\u00e9emploi<\/i> carbon calculator help evaluate impact, but only a precise and contextualized approach guarantees informed choices. In the design phase, an adapted protocol secures projects and paves the way for innovation. The sector is currently structuring itself: architects and engineers, be the pioneers of a controlled, sustainable, and inspiring reuse.<\/p>\n

1. Stone Reuse: A Lever to Mitigate Climate Change<\/h3>\n

Stone is omnipresent on Parisian fa\u00e7ades, particularly in the form of thin stone cladding, which has been very common in construction since the 1970s. During renovations or changes of use, the question of the future of these materials arises. Reuse\u2014which consists of dismantling, machining, and reinstalling the stone\u2014stands out as a relevant solution to limit waste and the environmental impact of the building sector. Thanks to its physical and mechanical stability over time, stone is particularly well-suited to this approach.<\/p>\n

Approximately 22% of CO\u2082 emissions linked to stone come from quarry extraction. Reusing material already extracted in the past therefore significantly reduces environmental impact. Furthermore, transport distances to processing centers are often shorter than those to quarries, further decreasing emissions. (1) Thin stone, being lighter than massive stone (approximately 3 cm thick), offers an additional advantage regarding transport, reducing carbon impact proportionally to weight<\/p>\n

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[Figure 1: Difference in carbon impact between a reused stone slab with distant machining, a reused stone slab with local machining, and a new product (2)]<\/figcaption><\/figure>\n

2. Transport: A Decisive Factor<\/b><\/h3>\n

The RE2020 regulation considers that reused materials have zero impact in terms of Global Warming Potential (3). This assertion is intended to favor and encourage the development of the sector and is taken into account in calculations performed by ecale.io, the parametric fa\u00e7ade evaluation tool developed by Arcora.<\/p>\n

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However, a more in-depth analysis reveals that transport can become the main emission source, depending on the distance. The graph above offers an impact analysis of three compared scenarios:<\/p>\n