Method for eliminating noise disturbances from floors when people walk on them

In a method for eliminating creaking floor noises from floor types in which an underlay 124, for example of particle board, is supported by a heat-insulating material 123, for example cellular plastic panels, a plurality of elongate spacer elements 31 made of hard and smooth material, for example metal or plastic laminate, are arranged between the heat-insulating layer 123 and the underlay 124. To do this, a lifting tool 32 is used which is essentially sword-shaped and which can be driven in between the insulating material 123 and the underlay 124 in order to make it easier to introduce the spacer elements 31. When the latter have been put in place, the sword-like lifting tool is withdrawn. The lifting tool and the spacer elements also form the subject of the invention. In addition to eliminating creaking floors, it is also possible, by using a suitable shape and choosing a suitable material for the spacer elements, to smooth out an uneven floor, change the level of the floor or its incline and/or change the elasticity of the floor.