The sustainability of stone

Steve Webb is co-founder of Webb Yates, engineers of Amin Taha’s controversial stone-structured 15 Clerkenwell Close. He talks to Peter Murray about the sustainability of stone as a building material and the work of the practice he started with Andy Yates in 2005.

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Amazing

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What about the structure inside? are the columns and beams made of stone, if not, then this becoming just a gimmick.