Partition wall

1. A partition wall for a building structure comprising a plurality of building units separated by such partition wall to provide acoustic insulation therebetween, said partition wall having a first and a second side and comprising:

a plurality of column assemblies substantially vertically mounted in a horizontally oriented base profile, each column assembly comprising:

a central element composed of mineral wool fibres and at least a first spacer elements composed of mineral wool fibres and extending from said central element towards the first side with a first intermediate profile provided between the central element and the first spacer elements and a second intermediate profile provided on a side of the central element facing the second side of the wall,

a second spacer elements composed of mineral wool fibres and extending towards the second side of the partition wall; and wherein a density of the mineral wool in the central element is higher than a density of the mineral wool in the first and second spacer elements,

one or more insulation sections fitted between two adjacent column assemblies of the plurality of column assemblies, wherein each insulation section comprises:

an inner mineral wool fibre panel provided in a close fit between the central elements of said adjacent column assemblies;

first and second mineral wool fibre panels provided in a close fit between the first and second spacer elements, respectively, of said adjacent column assemblies, wherein densities of said first and second mineral wool fibre panels are substantially the same and wherein the densities of said first and second mineral wool fibre panels are lower than a density of the inner mineral wool panel; and

a first external wall cover abutting the first mineral wool fibre panel and secured to the first spacer elements of the adjacent column assemblies, and a second external wall cover abutting the second mineral wool fibre panel and secured to the second spacer elements of the adjacent column assemblies;

wherein at least one of the first and second spacer elements in the column assembly has a fibre orientation which is substantially parallel with a main fibre orientation of the first and second mineral wool panels.

2. The partition wall according to claim 1 , wherein the partition wall is a party wall.

3. The partition wall according to claim 1 , wherein at least a length of the first spacer elements and a thickness of the first mineral wool fibre panel is substantially the same.

4. The partition wall according to claim 1 , wherein a length of the second spacer elements is larger than a thickness of the second mineral wool fibre panel whereby a space is provided between the inner mineral wool fibre panel and the second mineral wool fibre panel.

5. The partition wall according to claim 1 , wherein the first and second spacer elements are displaced relative to each other.

6. The partition wall according to claim 1 , wherein the first and second spacer elements are both provided to extend from the central element of the column assembly.

7. The partition wall according to claim 1 , wherein the first and second external wall covers are each made of at least one layer of gypsum board, and said first and second external wall covers have the same or a different number of layers.

8. The partition wall according to claim 1 , wherein the central element of the column assembly is made of mineral wool fibres having a density of 300-600 kg/m 3 (18.73-37.46 lb/ft 3 ).

9. The partition wall according to claim 1 , wherein the first and second external wall covers are each made of the same material.

10. The partition wall according to claim 1 , wherein a measured sound reduction Rw of at least 55 dB or higher according to EN ISO 10140:2010 in combination with EN ISO 717-1:2013 is achieved.

11. The partition wall according to claim 1 , wherein the fibre orientation of the at least one of the spacer elements in the column assembly and the main fibre orientation of the first and second mineral wool panels are parallel to the first and second sides of the partition wall.

12. The partition wall according to claim 11 , wherein the fibre orientation of each of the spacer elements in the column assembly is parallel to the first and second sides of the partition wall.

13. The partition wall according to claim 1 , wherein the first and second spacer elements are made of mineral wool fibres having a density of 70-150 kg/m 3 (4.37-9.36 lb/ft 3 ).

14. The partition wall according to claim 13 , wherein the first spacer element has a first density which is different from a second density of the second element.

15. The partition wall according to claim 14 , wherein the first density is approx. 100 kg/m 3 (6.24 lb/ft 3 ) and the second density is approx. 150 kg/m 3 (9.36 lb/ft 3 ).

16. The partition wall according to claim 1 , wherein the inner mineral wool fibre panel has a density of 60-80 kg/m 3 (3.75-4.99 lb/ft 3 ), and the first and second mineral wool fibre panels have a density in the range of 35-50 kg/m 3 (2.18-3.12 lb/ft 3 ).

17. The partition wall according to claim 16 , wherein the first and second mineral wool fibre panels have substantially the same density.

18. The partition wall according to claim 17 , wherein the first and second mineral wool fibre panels have a density of approx. 45 kg/m 3 (2.81 lb/ft 3 ).

19. The partition wall according to claim 1 , wherein the thicknesses of the first and second mineral wool fibre panels are substantially the same.

20. The partition wall according to claim 19 , wherein a building board is provided in a space between the inner mineral wool fibre panel and the second mineral wool fibre panel and wherein said board is secured to two adjacently situated second intermediate profiles.

21. The partition wall according to claim 20 , wherein the first spacer element is fitted to the central element in the column assembly and the second spacer element is secured to the building board.

22. The partition wall according to claim 20 , wherein the building board is an oriented strand board (OSB) or a flake board.