AndBruNRW
2025-11-10 20:36:09
- #1
I want to speak up once again! We had several appointments with the house builder. The corner elements of the corner windows previously consisted of 3 layers of Styrodur and a cover made of sheet metal. This was now replaced with a suitable window profile (I believe 5 chambers). Unfortunately, the replacement did not bring any improvement.
On Saturday I was able to conduct a perfect measurement once again: There was a leaf blower running in the neighbor’s garden. 60dB with the window open. With the window closed, about 44dB still reached inside. And this in the room where the 47dB soundproof glass was installed. So it definitely is not (only) the glass.
The larger the window area per room, the louder the outside noise. In the room without a window (pantry) I hear absolutely nothing from outside. The bricks keep the approximately 38dB outside.
We live about 600 meters as the crow flies from the federal road. So we did not build directly next to it.
Furthermore, my measurement shows a level of about 38 dB from the revving engines. However, I hear this throughout the entire house. Sometimes there is not a big difference between window open and closed (of course there is with the 60dB leaf blower. But with the normal traffic noise of 38dB it sometimes sounds just as loud inside as outside).
By now I suspect our roller shutter boxes. The surface-mounted boxes are made only of PUR rigid foam and sound hollow when knocked on, as if it were a cavity. So super light material. The manufacturer states 46dB insulation - although I don’t really trust that value for such a soft material.
Has anyone here had similar experiences with surface-mounted boxes? In the photos in the first post you can see how they are constructed. After they were installed, they were only plastered from the inside and outside. That means, when I knock on them from inside or outside, you basically hear the Styrofoam (rigid foam).
Here is an updated summary that I posted elsewhere (I was advised to get in touch here again :) )
On Saturday I was able to conduct a perfect measurement once again: There was a leaf blower running in the neighbor’s garden. 60dB with the window open. With the window closed, about 44dB still reached inside. And this in the room where the 47dB soundproof glass was installed. So it definitely is not (only) the glass.
The larger the window area per room, the louder the outside noise. In the room without a window (pantry) I hear absolutely nothing from outside. The bricks keep the approximately 38dB outside.
We live about 600 meters as the crow flies from the federal road. So we did not build directly next to it.
Furthermore, my measurement shows a level of about 38 dB from the revving engines. However, I hear this throughout the entire house. Sometimes there is not a big difference between window open and closed (of course there is with the 60dB leaf blower. But with the normal traffic noise of 38dB it sometimes sounds just as loud inside as outside).
By now I suspect our roller shutter boxes. The surface-mounted boxes are made only of PUR rigid foam and sound hollow when knocked on, as if it were a cavity. So super light material. The manufacturer states 46dB insulation - although I don’t really trust that value for such a soft material.
Has anyone here had similar experiences with surface-mounted boxes? In the photos in the first post you can see how they are constructed. After they were installed, they were only plastered from the inside and outside. That means, when I knock on them from inside or outside, you basically hear the Styrofoam (rigid foam).
Here is an updated summary that I posted elsewhere (I was advised to get in touch here again :) )
Hello everyone,
unfortunately, even after 12 months since moving in, we have made no progress. Here is a brief summary:
[*]Enormous noise problems in the new build (built 2024)
[*]The noise definitely comes from the windows
[*]Installed windows: Kömmerling 76 profiles with triple glazing (4/14/4/14/4) – according to the manufacturer 32 dB
[*]Surface-mounted roller shutter box: Roma Puro 2.XR-RS (allegedly about 46 dB)
[*]Box is plastered on inside and outside, but otherwise not further “shielded”
[*]In the bedroom, soundproof glazing (47 dB) was installed afterwards
On Saturday I did a test with a running leaf blower:
[*]Window open: 58 dB
[*]Window closed: 44 dB
That was at the window with soundproof glazing! In the adjacent room with the “normal” glass, the values were almost identical though. That means to me: The glazing is not the main problem.
The noise is clearly noticeable in all rooms. Two things all windows have in common:
[*]The glazing
[*]The surface-mounted box
In rooms with a high proportion of window or roller shutter box area, the noise is especially loud – for example in the office with a 4 m wide and 1 m high window front.
What makes me suspicious: When I put my ear to the glazing, I feel the noise and vibration with the normal glass. With the soundproof glazing I feel nothing – although the measurements (e.g. in the leaf blower test) show no significantly better insulation. At the same time, I "hear" nothing when I put my ear to the roller shutter box.
By now I therefore suspect the surface-mounted box. Although it has a sound insulation of 46 dB according to the test certificate, it consists of PUR foam and sounds very hollow when knocked on – almost like a resonance chamber or amplifier.
Does anyone have any idea what else it could be? We’re really at a loss now …