A very important element of Conan Exiles is the construction of buildings. At the beginning of the game the player doesn't focus on the creation of complicated architectural blocks, but later on the scheme is the same, you choose more complicated and durable elements from the menu.
The main element of every building are the foundations. Enter the character menu and search for the foundation that you are interested in. Then start to create the quantity you need. Of course, this requires a certain amount of raw materials which are shown next to every construction element. After foundations have been crafted, they can be selected from the wheel menu. Then, you may lay them in the appropriate place.
Other building elements, such as walls, doorposts, ceilings and roofs are created in the exact same way as foundations.