Impact sound insulation - Which values are important for impact sound?

Hello KlaRa,

how did you solve it in your test with laminate and construction protection mat?

In my house, I have two different starting situations:
1. These rooms on the upper floor are still in a shell state in terms of the floor. There are only the beams on which tongue and groove boards are laid.
2. In these rooms, there is already pine wood planking, but the impact sound insulation underneath is so poor that I either take everything up again or lay a super impact sound insulation on the pine planks and then vinyl or cork on top.

The impact sound insulation is extremely important to me because there is a tenant living in the rooms below whom I do not want to drive away. Therefore, I am also willing to spend a bit more on insulation.

Yesterday I researched online all day and thought of the following setup for the shell rooms: on the tongue and groove board, a permeable foil and dry fill for height equalization, then dry screed possibly with wood fiber impact sound insulation, then vinyl or cork on top. My problem with this is: where can I still incorporate additional impact sound insulation? Under the vinyl?

And I am still completely at a loss regarding the other rooms with the pine planks...

Best regards
Sowela

We must let go of one thought: That "optimal impact sound insulation" can be achieved with a timber construction method (and according to your words, that is what this is about). Impact sound in timber construction always falls behind that of solid construction. The best impact sound insulation in timber construction is achieved with mineral wool (or if fire protection requirements must be met, with glass wool). It absorbs the vibrations best. However, the matter is somewhat more complicated than a layperson can assess! Because all such impact sound insulation materials do not absorb low frequencies. When walking, a dull "DUMM DUMM DUMM" sound will always occur later in the apartment below. This can only be reduced by mass, which we cannot apply. This means: we recognize the disadvantages and must come to terms with them. A good assembly from my point of view would be - mineral wool as impact sound insulation on the tongue-and-groove plank surface, which was previously covered with overlapping paper layer, - on top of this, two-layered gypsum fiber boards (e.g., BRIO) laid crosswise, - on top of this as the usable surface thicker (decorative) cork boards ------------------------ A leveling fill is only necessary in exceptional cases (with very strong warping of the support surface) when using mineral wool insulation boards. Wishing you continued success: KlaRa

Thank you KlaRa for your advice,

that sounds good! Do you mean Brio dry screed panels when you say gypsum fiberboards? One last question: What thickness would you choose for mineral wool (Rockwool stone wool?) and gypsum fiberboards for an optimal solution?

Best regards
Sowela

BRIO 18, 2-ply as load distribution layer, underneath "Akustic EP2" or "Akustic EP3" (ISOVER) in 30mm thickness.

Great! Thank you very much for your advice!

BRIO 18, 2-ply as load distribution layer, below that "Akustic EP2" or "Akustic EP3" (ISOVER) in 30mm thickness.

Hello KlaRa I have a similar problem to solve and came across this article. Below I show my structure and will ask the questions right here: Why do you recommend Akustik EP2/EP3 and not EP1? Are the differences to other manufacturers like Rockwool HP, SE, xy, xy significant? Reason for my questions: The EP1 shows in its datasheet an impact sound improvement of up to 36dB depending on the structure, for all other products from Isover and Rockwool I see no such information. However, the price difference from Isover to other manufacturers is also considerable. It is important to me to achieve a high impact sound insulation! Object: Unfinished attic in a 120-year-old house with wooden beam ceilings (no more sand filling between the ceiling beams was previously removed by the community due to insulation) My structure: from bottom to top 1) Directly suspended drywall ceiling 12.5mm thick (not decoupled or free-hanging installed) 2) Insulation between drywall ceiling and lime-cement plaster ceiling 3) approx. 2-3cm thick lime or lime-cement plaster ceiling on battens nailed under the ceiling beams 4) approx. 18cm high ceiling beams, whereby the cavities are probably insulated with 180mm thick Isover likely WLG 035. 5) ATTENTION: due to build-up height, the 25mm thick OSB board was not laid on the ceiling beams but between them and leveled here immediately to later have as little height difference as possible (compensation for uneven ceiling beams). Previously, 50x60mm thick beams were screwed to the ceiling beams on the sides inside to lay the OSB boards on them There should be a maximum build-up of 7cm (without parquet/tiles etc.) on this. It should be laid here with 3cm impact sound insulation, edge insulation (mineral wool or PVC?), the foil for the flow screed and then approx. 4cm flow screed (anhydrite). In the living area, the floor build-up is to be carried out later with impact sound insulation, possibly 2-3mm cork or other better material? and real wood parquet (oak). Bathroom and WC are to be tiled. The problem with the surface on which the build-up with impact sound insulation and flow screed is to be carried out is: The ceiling beams have different heights between the OSB boards, sometimes they are flush, sometimes they protrude 1cm above or have even been doubled on the side, and I have several levels between the OSB board cavities. Should I now level these unevennesses with a bound screed (possibly increased impact sound)? Or should I level these unevennesses with the EP1, which is available in 5mm increments in thickness? Greetings from Bavaria