When the floor became unusable

In the case when the floor has already become unusable and is not able to withstand the loads before laying the laminate should be carefully prepared. To do this, remove the carpet or any other flooring. Disassemble the plank floor and remove all the dirt and dust. Next, you need to make a screed. Determine the upper edge of the screed, be sure to use the level. You can do it like this. Measure on the wall the height of the future screed and putting the level to the side make another mark. Thus go around the entire perimeter of the room.