In this paper it is attempted to investigate the Leca blocks as sustainable construction material for\nthe exterior walls of passive house. The building physical properties of Leca design wall structure\nare studied along with the environmental impact and load-bearing capacity. To compare the results,\na similar analysis is carried out considering the traditional wooden wall construction of passive\nhouses. The results showed that Leca design wall structure can be an alternative sustainable\nsolution to the traditional wooden wall structure of passive house, mainly due to its low U-value,\nits ability to handle moisture, and comparable structural load-bearing capacity. However, the\nwooden wall structure is more environmentally friendly than the Leca blocks due to its lower\nemissions to the environment and reduced energy use, especially during the manufacturing process.
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