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External cladding: Larch and lime


Now the straw walls of our eco-classroom at Castle Hill School have had their first coat of lime render, it’s time for the cladding.

We’re using Scottish-grown larch boards – a durable hardwood which will naturally mature over time to an attractive silvery grey.

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A ‘truth window’, created so that users of and visitors to the building can see the material behind the cladding.

Other parts of the building have been simply rendered using traditional lime, a material often used on straw buildings. Lime is a carbon neutral building material, created by burning limestone. When lime is applied to any surface, the carbon dioxide released during the burning process is re-absorbed as the render dries.

Photo 08-10-2014 19 41 44

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