The idea here is to use a thermalite building block, cut it to the desired size and add the tiles on for effect. The factory picture in this section uses two blocks, the top one had an angle cut in to receive the roof sections. I have added a Jig stone winch and pulley extension on the front with some other add on details to give it an industrial feel. The factory building here is available on request and comes fully assembled and painted, be warned it takes a fair amount of time to assemble and paint so the more cost effective way is to have a go yourself.

You can see the factory is low relief but if you wanted another side to it then this is easily achievable.