They serve

For greater accuracy, wooden bars are used. They serve not only to level the doors to the desired angle, but also to soften and muffle strokes when opening and closing the door. In order for the door to use the door for many years to shift in the corners, pieces of foam are used for this. After that, all the cracks between the frame and the wall are discouraged with mounting foam. It is a warm and soundproof material. The installation of the door is finished.