waterproofed extensively . This posed a challenge as the wall was constructed out of Tyres and Cob . The walls received a layer of plaster to secure the cob and provided a substrate to apply bitumen layers . An added bubble drainage layer , sand and a French drain were then added before the embankment wall was re-established . The tyre wall started at a base width of 800mm and ended at 400mm wide toward the top .
The outer rammed earth wall was challenging as it had to house the structural columns needed to support the roof that was designed as a coffer slab , enabling the design team to have the hall space free of any columns . The internal columns could not interfere with the earth ramming process . The rammed earth used was local material and two colours were used to create a colour movement within the wall . The rammed
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