Use dry bulk as sound insulation

Sound insulation through dry bulk

• Sound insulation can be done using the bulk of a building material. If you fill a hollow room that does not offer any resistance to sound with a heavy building material, the sound will be insulated. Even light dry heaps are heavier than air. So that means you are putting a mass against the noise.
• Sound can also be excellently attenuated by sending it through a loose building material. The individual particles are set in vibration by the sound and consume the sound energy through friction with one another. For this reason, light bulk materials such as expanded clay can also swallow sound.

Use of bulk beds

• The general rule is to fill cavities. Naturally, this is easiest if you do it during construction, i.e. before you seal the cavities. Depending on the area of ​​application, you need a load-bearing embankment, i.e. something that you can also walk on later. You have to bring this in if the floor is laid directly on top of the fill. If this is attached to load-bearing beams, for example, the fill does not have to be load-bearing.
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• Even if the dry fill always provides sound insulation, you should also apply impact sound insulation. This must be done over the entire surface if the floor is directly on top of the fill. With beam constructions you can use the additional insulation also only attach to the beam.
• Follow the manufacturer's instructions for the pouring. Some products are very dusty, so you must wear a dust mask while pouring the material, others do not need the mask.


The screed insulation - this is how it works

The screed is the substrate that is applied last, before a ...

• There are also differences with regard to any compression that may be necessary. If you subsequently insulate cavities with embankments, it is often difficult to compact. In this case, you should use materials that should not be compacted.
• Also note the manufacturer's recommendations regarding trickle protection. In the case of loose material with a small grain size, fleeces or foils usually have to be laid before you can pour out the material. For subsequent insulation, fabrics that do not require trickle protection are better.
• Pay attention to lines that are routed in the area where you will be pouring the insulation. It usually makes sense to lay them in channels.
• The biggest advantage of dry bulk material is that even a layperson can pour it out without any problem. For subsequent measures, you often only have to loosen a few floorboards to fill larger cavities.