It is for this reason that the shells should not be used as bearing external walls in the lower floors of a multi -storey building. Basically, the shellship is used to build low -rise buildings, utility rooms, garages and cottages. If a shell is used in the construction of the house, it is better to use it on utility rooms or to the second floor, which will not carry a heavy load of the first floor. Must be installed on the site so as not to go far for water.