Combi Solutions

Often the best results will appear when two or more methods are joined in common battle against the noise.
Good examples can be welded on structural damping cassettes for lower frequency reduction in the structure combined with Rockwool insulation to cover the remaining bulkhead for reduction of the higher frequency noise.

And if this built up is then covered by a thin steel sheet cladding system, nonridged mounted to the bulkhead, it will create a perfect system for noise reduction through the bulkhead along with dampening of the structure borne noise.

Another very good principle of combination is structural steel damping by applying a special fi re resistant PU resin to the bulkhead / deck and gluing into this thin steel sheets, hereafter covering all by Rockwool to create the excellent combination of structural damping, reduction through the bulkhead / deck and very good absorption.

For areas/ solution where no special strength / compression / bending / etc is required, Rockwool Marine Slab 80 is recommended as the best compromise of noise absorption / reduction and weight / mechanical strength. For floating floor systems it is Rockwool Marine Slab 140 or Rockwool Marine Slab 200. But for a large range of more specialised solutions Rockwool engineers are available to guide and recommend in order to obtain the best possible solution.

For vessel types where the noise reduction and absorption are required to the extreme, it will be necessary to make complex built-ups.

These solutions will often be made vessel specific by dedicated specialist companies, but one bulkhead example of built-up is shown below.

  Example of possible high-end built-up.

Such solution should be calculated and specific tested, in order to ensure the best possible result.