The structure of the bathroom unit floor, walls and ceiling is made of lightweight concrete with a 6 mm diameter wire-mesh reinforcement. The 50 mm thick external concrete walls are smoothed. All holes for the conduction of services, window and door openings are accordings to project specification and are subject to the customer’s approval. The installation of the bathroom unit is specifically placed on rubber mats to provide elements of acoustic insulation. All direct contact points between the pod unit and the building structure have to be carefully avoided.