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1. Assembling the grillage and fastening to TISE piles 2. Installing 50*200 floor joists and installing the subfloor 3. Assembling 50*150 walls and covering with OSB and wind protection. 4. Installing 50*200 roof beams, installing 9mm OSB, installing the membrane, fastening the 50*50 ventilation bar, installing 18mm OSB, installing the underlay carpet.