Nowadays there are a huge number of doors models. They have a different structure, manufacturer type and cost. Even if similar doors have a different price, then one of them will have a low -quality canvas. Natural wood interior doors are the most expensive. Since this material is of high quality and living standards, but it does not pass the air well. Such a door must be put in rooms that do not have humidity. It can expand from moisture in size and swell from the inside, because of this they will be poorly closed and the cut of the canvas will deteriorate.