Thanks to the use of dowels.

Using special adhesive.

Thanks to the use of dowels.

In practice, it is recommended to use these two methods simultaneously.

First, foamplex is applied to the surface of the wall, the slabs of which should be firmly settled to each other. The seams and adjoining are best closed thanks to the mounting foam. The second layer consists of a foam that should be foil inside the room. During work, make sure that large seams or overlap are not formed. The joints of this material are glued with a special aluminum tape lamp.