Partition wall insulation
Partition walls must be designed and constructed in such a manner that, in addition to functional partitioning of space, they may provide acoustic and fire protectionas well; they should also provide thermal protection if they separate a heatedroom from an unheated one. By using KnaufRock KR SK / KR SKG / KR L stone wool, characteristics of partition walls are significantly improved, providing simultaneously acoustic, fire and thermal protection. Advantages of using Knauf Rock: - Improved acoustic protection – excellent absorption material owing to its open porosity and high density
- Increased fire prevention in the building – incombustible material with extremely high melting temperature of above 1000˚C, thus providing longer fire prevention
- There is no distortion or sinking of the insulation material – permanent dimensional stability in the system is provided
- Thermal protection ensured – heat conductivity group 040
- Simple and fast installation
- Optimal dimensions of slabs for installation between substructure profiles
- Mounting of other installations within the system is enabled.
Air sound A sound that is generated and transmitted by air is called air sound. A sound is generated by the oscillation of air particles which are taken out of their position of equilibrium by an external effect (by the source of air sound). Typical sources of air sounds are human speech, music devices, TV, music instruments etc. A physical characteristic of partition walls that shows their capability to retain the energy of sound is called sound insulating power, and the unit of measure is decibel (dB).The main air sound protection in buildings is partition walls.Prefabricated partition wall Prefabricated partition walls mainly consist of a metal or wooden substructure on acoustic buffers, a covering of one or several slabs (veneer base, mineral, wooden etc.) and an infilling of fibrous material with open porosity and with airflow resistance of min. 5kN·s/m4. The higher absorption coefficient of the insulation material (α), the lower intensity of the part of sound energy that penetrates the partition.
Installation of a prefabricated partition wall |
1. Before installation, appropriate sealing tape or putty should be applied to edge profiles in order to ensure the connection of the profiles with the walls, floor and ceiling. Then the edge profiles should be tightened with appropriate tightening elements. Vertical profiles of the substructure should be placed at axial distance of 60 - 62,5 cm between floor and ceiling horizontal edge profiles (in accordance with the manufacturer’s instructions). | 
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2. On one side of the wall, veneer base should be placed and tightened to the vertical profiles of the substructure with screws at certain distance. Then all installations provided for by the design should be carried out. | 
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3. Inorder to obtain acoustic, fire and thermal protection defined by standards, KnaufRock KR SK / KR SKG / KR L stone wool slabs should be placed between the profiles of the partition wall substructure. | 
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4. The other side of the wall should also be covered with veneer base. The wall is thus closed. Finishing of the wall should be carried out in accordance with the purpose of the room, as well as in accordance with instructions of the veneer base manufacturer. | 
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Notes to the installation: Proper selection of the structure and material of a partition wall is not a guarantee that the acoustic protection will also be appropriate. Because of that, care should be taken at the installation to avoid the occurrence of sound bridges: - Stone wool slabs should be placed close to each other (empty space between them) and good adherence of the slabs to the supports of the substructure should be provided.
- Joints of the partition wall with sidewalls, floors and ceilings, as well as joints of all additional elements incorporated in the partitions (windows, doors, ventilation and installation canals…) must be properly executed – in accordance with instructions of the manufacturer of dry-mounting walls.
Prefabricated partition walls may provide a high level of acoustic protection with a proper selection of infilling, veneer base i.e. gypsum board and substructure.
Partition wall type According to Knauf system | Infilling Knauf Rock | Sound insulation Rw (dB) | | Single metal substructure and single covering W111, profile 75CW | KR SKG d=7cm | 48 | | Single metal substructure and double covering W112, profile 75CW | KR SKG d=5cm | 55 | | Single metal substructure and triple covering W113, profile 75CW | KR SKG d=5cm | 58 | | Wall between flats Double metal substructure and double covering + slab inside the wallW115, profile 75CW | KR SKG D=2x7cm | 66 |
Results of sound protection measuring (results of measuringin a chamber without lateral conduction): Improvement of acoustic insulation of walls Improvement of a brick wall insulation against air sound is ensured by using Knauf Rock KR SK / KR SKG / KR L stone wool slabs in a system with a covering consisted of one veneer base on a metal substructure (in accordance with recommendations of veneer base manufacturer). The improvement of air sound insulation measured in a chamber without lateral conduction with installed 5 cm thick KR SK / KR SKG / KR L stone wool is 14dB.
When placing insulation on the warmer side of a wall (at external wall insulation from the inside, or at insulation of a wall between heated and unheated rooms), a vapour barrier must be placed on the warmer side of insulation material, i.e. between stone wool and veneer base.
Advice for proper use |
