8 cm

But then it is worth mentioning about the presence of some shortcomings, this type of ceiling has. Firstly, stretch ceilings of the Dune type select a lot of space, that is, significantly reduce the height of the ceiling. If in more detail, then if the usual stretch ceiling can be organized so that it will take 8 cm of the height of the room, then when arranging Dunes you will have to say goodbye to 25 cm, and this is already a lot.