Abstract: A method and a module system for building purposes by using a module system is provided, said module system including a plurality of mutually equal-sized basic components, which are assembled for a wall structure in one or more vertical planes by installing the same in connection with each other side by side and on top of each other. The wall structure is put together from substantially thin-walled basic components, which are open at ends thereof opposite in a lengthwise direction thereof and have an open internal space, and which are coupled to each other side by side and on top of each other with connection pieces capable of being connected with a first form locking joint to lengthwise coupling arrangements present on each external side thereof. The basic components are coupled to each other with an end block interconnecting the basic components by the opposite ends thereof.

Abstract: A method and a module system for building purposes by using a module system is provided, said module system including a plurality of mutually equal-sized basic components, which are assembled for a wall structure in one or more vertical planes by installing the same in connection with each other side by side and on top of each other. The wall structure is put together from substantially thin-walled basic components, which are open at ends thereof opposite in a lengthwise direction thereof and have an open internal space, and which are coupled to each other side by side and on top of each other with connection pieces capable of being connected with a first form locking joint to lengthwise coupling arrangements present on each external side thereof. The basic components are coupled to each other with an end block interconnecting the basic components by the opposite ends thereof.