In module production, monolithic room modules are manufactured in one piece. The production is usually stationary, given the size and weight of the formwork. The filling of a room module mould is traditionally done from the top, but can also be done by pumping concrete from the bottom when using a self-compacting concrete (SCC).
The mould design is usually adapted to the filling method desired by the customer.
Walls and slabs are concreted in one step. Compaction is done with formwork vibrators or is omitted if SCC is used. After hardening, the outer walls of the form are opened sideways and the inner core of the form is opened downwards hydraulically or lifted out upwards by means of an overhead crane.
The standardization in design and dimensions, the reduction of waste, the elimination of transport routes and manual work as well as the industrial organisation of the process are decisive for the economic efficiency of modular construction.
Modular design is the only construction method that offers the possibility of prefabricating essential parts of the fittings together with the load-bearing structure. These advantages can be used in particular for fitting-intensive assemblies, e.g. room cells for bathrooms and kitchens or rooms for hotels, care homes or hospitals with integrated sanitary facilities. With these room modules, the entire electrical and sanitary installation is cast in concrete. The finished room cell then only needs to be set up at the installation site and connected to the main supply line.
Another application area for prefabricated concrete room modules is for installations like transformer stations, power generators or data centers.