With the wall, drill

In order to waterproof the wooden floor, it must first be insulated. To do this, the first thing is the so -called black floor, which is also processed by waterproofing impregnation. A heater is laid on top of it and then a clean floor from the floor boards is already laid, on which a waterproofing coating of bitumen or polymer varnishes is also applied. But it should also be taken into account that if the space is provided between the draft and the clean floor, then in this case it is necessary to provide ventilation. To do this, in those places where the floor boards are joined with the wall, drill small holes with a diameter of 10mm.