The classic type of blind area covers the perimeter of the whole house, and it should be located close to the basement, the width of this design will be approximately 80 centimeters, and the slope is 5-10 degrees. This type of blind area has the largest width, because all the reliability of the structure depends on it. It should be noted that the width of the strip directly depends on the protrusion of the roof of the house: the blind area in any case should be wider than it at least twenty centimeters. The type of soil should also be taken into account. There is soil, which is very easily compressed, in this case we need an extremely wide structure. If the basement room is located at the bottom of the house, then the structural element under consideration must be additionally insulated using insulating material.