DK156736B - Covering for insulating footfall noise - Google Patents

Description

DK 156736 B

The invention relates to a coating for insulation of step sound and of the nature specified in the preamble of claim 1.

The problem underlying the invention is to reduce or eliminate the step noise (which term is used here as a synonym for structural noise) arising in or coming from rooms where the floor is subjected to severe blows and place. If such premises are found in buildings that also contain, for example, housing or offices, it is of great environmental importance to reduce the step noise. Examples of rooms that, without precautionary measures, give rise to step sounds are gymnasiums, gymnasiums and craft rooms.

To meet, as far as possible, at least nominally, the authorities' requirements for step sound insulation, there are numerous overfloor structures. However, it has been found that such overfloors are insufficient under such extreme conditions as occur, for example, by eager work with weightlifting tools in the commendable "bodybuilding" institutes often found in residential buildings. It has even been found that the step sound insulation is insufficient even when known overfloors are installed on very heavy concrete joists.

The invention aims to remove these deficiencies and to provide a technically and practically acceptable solution to the step sound problem.

Accordingly, the invention relates to a coating for insulation of step sound, and which is intended to cover at least part of a beam layer and to form an overfloor or supplement to such. The coating is characterized in that it consists of an even, stiff and relatively rigid surface layer and a resilient layer of polyether foam plastic, preferably polyether foam plastic glue which is glued and compressed to a plate and has a density in the interval

DK 156736B

2 80-160 kg / m *. Conveniently, the elastic layer has a thickness in the range of 3-10 cm, preferably 3-8 cm.

If the location where the step sound or structural noise occurs in the room is geographically limited, as is the case, for example, with stands for weightlifting rods, the coating according to the invention can be designed as a unit with a smaller area than the floor surface. in the room and can typically correspond to a "breakneck" or the coating can be designed as one of 10 smaller plates composite platform with a single total area.

In a preferred embodiment, the surface layer consists of a wood fiber board, a plywood board or a chipboard having a thickness in the range 15 to 25 mm.

Layers of material other than these may be conceivable, provided that they meet substantially the same requirements with respect to surface weight and bending stiffness. However, the types of materials mentioned have empirically been found to meet even high expectations as far as step-sound insulation is concerned.

In the drawing, FIG. 1 is a partial section through a coating according to the invention for isolating step sound; and FIG. 2 shows a similar coating with fixing elements for the incoming surface layer.

On a resilient layer 2 a relatively rigid and shock absorbing surface layer or outer layer 1 is arranged.

The outer layer 1 preferably consists of pressed wood fibers or chipboard, lamellae or plywood sheets which are glued or otherwise joined together at the edges, and the layer may, if desired, be covered with a suitable covering, for example a plastic mat or a carpet. The layer thickness is in the range 15-25 mm.

The resilient layer or plate 2 is suitably composed of polyether foam plastic and preferably then

Claims (7)

1. Coating for insulation of step sound and intended to cover at least part of a beam layer and to form an overfloor or ancillary to such, characterized in that it consists of an upper, stiff and relatively rigid surface layer (1) and a resilient elastic layer (2) of polyether foam plastic, preferably polyether foam plastic, which is glued and compressed to a sheet, at a density in the range of 80-160 kg / m 2. DK 156736 B 2. Coating according to claim 1, characterized in that the elastic layer has a thickness in the range of about 3-10 cm. Coating according to claim 2, characterized in that the surface layer comprises a wood veneer plate, for example a plywood or chipboard, having a thickness 1 in the range 15-25 mm. Coating according to claims 1, 2 or 3, characterized in that the elastic layer in the boundary area against the surface layer contains elongated fastening elements, for example wood ribs, for fixing the surface layer. 5. Coating according to claim 4, characterized in that the fastening elements are positioned in accordance with a module dimension in the surface layer. The function of the composite flooring structure according to the invention is largely co-existing. The lower, elastic layer acts as a molded spring, resembling steel coil springs combined with visco-elastic shock absorbers of the type found in cars. At the same time as the spring action and the internal damping in the elastic layer reduce the sound transmission in the vertical direction to the substrate, the propagation of the shock energy in the horizontal direction is also reduced. In the embodiment shown in FIG. 2, the elastic layer 2 is provided on the upper side with ribs 3, which are conveniently made of wood and can be pressed into the layer 2 in connection with its manufacture, so that the ribs are essentially completely embedded in the elastic layer. The anchorage of the ribs in the elastic layer may be purely adhesive or a combination of adhesive or mechanical anchorage may be used. The center line spacing of the ribs is preferably 40-60 cm and their cross section preferably about 20 x 20 mm. Their location can be selected from any surface target target which can be seamed or glued to the ribs. 6. Coating according to claim 5, characterized in that the surface layer is arranged to be adhesively fastened and / or when seamed. Coating according to claims 4, 5 or 6, characterized in that the fastening elements are substantially embedded in the elastic layer.