ᐅ After reviewing the development plan, are noise protection measures necessary?
Created on: 24 Jul 2025 13:04
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Stone82
Hello,
I have completed all the preliminary planning and sent all the documents to the builder.
The builder has determined that, according to the development plan, specific soundproofing measures are required for the plot.
The house upgrade includes a decentralized ventilation system, special soundproof windows, soundproof insulation for the roller shutter boxes, and a noise protection expert.
Of course, with additional costs.
However, I am not very satisfied with the decentralized ventilation system and believe a central ventilation system would be better.
What is your opinion?
I have completed all the preliminary planning and sent all the documents to the builder.
The builder has determined that, according to the development plan, specific soundproofing measures are required for the plot.
The house upgrade includes a decentralized ventilation system, special soundproof windows, soundproof insulation for the roller shutter boxes, and a noise protection expert.
Of course, with additional costs.
However, I am not very satisfied with the decentralized ventilation system and believe a central ventilation system would be better.
What is your opinion?
Actually, the general contractor (GC) is not at fault for this.
I reviewed the development plan again and I probably completely misunderstood or overlooked this point myself. You can call it my own mistake if you want.
Originally, window rebate ventilation was planned. That was also the standard. We consciously decided on this.
We wanted it that way.
Development plan, municipality of Etzelwang, residential area Feil
Don’t be surprised, we are the first.
I reviewed the development plan again and I probably completely misunderstood or overlooked this point myself. You can call it my own mistake if you want.
Originally, window rebate ventilation was planned. That was also the standard. We consciously decided on this.
We wanted it that way.
Development plan, municipality of Etzelwang, residential area Feil
Don’t be surprised, we are the first.
Of course, a house model in a catalog can only comply with general building regulations, and not necessarily with the specific requirements of the local development plan (which can vary even within the same town). If your chosen house model exceeds the standard—for example, by meeting the EH40 energy standard beyond the Building Energy Act—it does not automatically mean that it is upgraded in other aspects as well.
The general contractor (GC) has thus translated the advanced requirements into necessary actions and taken into account your preference against window rebate ventilation. They have concluded that offering a controlled residential ventilation system is likely suitable. Such a system is usually central (if you want to include many or all rooms), which is generally more cost-effective, but also more complex to install. This is likely why they proposed a decentralized version for you.
I have already briefly explained both options to you. Value and price are “two different things,” so even if the central option is generally less expensive, the GC will probably offer it to you at a higher price.
Although I work as an independent building consultant, I am currently fully booked well in advance and remain neutral regarding construction methods. If you want to build with a timber frame construction method, I therefore recommend a consultant specialized in that area, such as Tobias Beuler (“prefabricated house expert”), Guido Freyermuth (“prefabricated house Guido”), or (warning: requires fluent Bavarian dialect comprehension!) Andreas Zink (“Zink prefabricated houses”).
I have accepted this ambiguity as a characteristic of layman’s language and don’t feel the need to correct it every time. At least the original poster understood that a timber frame panel house manufacturer can also be a GC.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Stone82 schrieb:
We have consciously decided on window rebate ventilation. [...] Such decentralized ventilation systems are listed in these adjustment measures.
The general contractor (GC) has thus translated the advanced requirements into necessary actions and taken into account your preference against window rebate ventilation. They have concluded that offering a controlled residential ventilation system is likely suitable. Such a system is usually central (if you want to include many or all rooms), which is generally more cost-effective, but also more complex to install. This is likely why they proposed a decentralized version for you.
Stone82 schrieb:
Before the construction meeting or the fittings appointment, I want to get a clear picture of whether this is a good solution or if the central system, which may come at a slight additional cost, would be worth it, as I personally don’t see decentralized ventilation as particularly great.
I have already briefly explained both options to you. Value and price are “two different things,” so even if the central option is generally less expensive, the GC will probably offer it to you at a higher price.
Although I work as an independent building consultant, I am currently fully booked well in advance and remain neutral regarding construction methods. If you want to build with a timber frame construction method, I therefore recommend a consultant specialized in that area, such as Tobias Beuler (“prefabricated house expert”), Guido Freyermuth (“prefabricated house Guido”), or (warning: requires fluent Bavarian dialect comprehension!) Andreas Zink (“Zink prefabricated houses”).
Papierturm schrieb:
I always correct my wife to say “GC” or “building company” when she says developer... she doesn’t like it either...
I have accepted this ambiguity as a characteristic of layman’s language and don’t feel the need to correct it every time. At least the original poster understood that a timber frame panel house manufacturer can also be a GC.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Papierturm24 Jul 2025 18:26Okay. I’ve read the development plan. I still don’t understand the problem.
Quote from the development plan, emphasis mine:
So, to understand the issue, here are my questions again:
Which ventilation system was originally planned?
Which ventilation system does the general contractor propose?
Which ventilation system is desired as an alternative?
As far as I can tell from the development plan, there is already quite a lot of flexibility. The only thing that would not be acceptable would be to build without ventilation. However, as far as I understood from the original post, that was not planned?
Quote from the development plan, emphasis mine:
To comply with the acoustic requirements in the noise-sensitive rooms of planned residential buildings, passive noise control measures at the building (soundproof windows, decentralized or centralized ventilation systems) must be implemented according to the version of DIN 4109-1 valid at the time of the building permit. Proof must be provided as part of the building permit process.
So, to understand the issue, here are my questions again:
Which ventilation system was originally planned?
Which ventilation system does the general contractor propose?
Which ventilation system is desired as an alternative?
As far as I can tell from the development plan, there is already quite a lot of flexibility. The only thing that would not be acceptable would be to build without ventilation. However, as far as I understood from the original post, that was not planned?
Correct.
It was not planned to build with a corresponding ventilation system.
Due to the development plan, we are required to install a ventilation system.
The general contractor (GC) suggests a decentralized ventilation system.
In my opinion, I think a central system would be better.
That is why I am bringing up this topic here now.
However, I realized that I didn’t communicate this very well. I sincerely apologize for that again.
I am a bit surprised that they wrote this to me.
So far, I have not found anything stating that a central ventilation system is cheaper than a decentralized one.
It was not planned to build with a corresponding ventilation system.
Due to the development plan, we are required to install a ventilation system.
The general contractor (GC) suggests a decentralized ventilation system.
In my opinion, I think a central system would be better.
That is why I am bringing up this topic here now.
However, I realized that I didn’t communicate this very well. I sincerely apologize for that again.
11ant schrieb:
I already classified the two options for you earlier. Value and price are two different things, so the GC will charge you a higher premium for the central system, even though it is actually cheaper.
I am a bit surprised that they wrote this to me.
So far, I have not found anything stating that a central ventilation system is cheaper than a decentralized one.
Papierturm24 Jul 2025 19:03Okay. Now I understand!
At first, I misunderstood:
Okay. If no ventilation was planned at the beginning and now the choice is between central and decentralized, here is my opinion on the matter:
A good central ventilation system has several features that a decentralized one does not offer to the same extent (heat recovery in winter; with an enthalpy exchanger, it can maintain comfortable humidity levels in winter. At the same time, some ventilation systems have good programming options to automatically reduce heat during summer).
Therefore, if the budget allows, I would plan with a central ventilation system.
PS: Here we only have words. No facial expressions, tone of voice, or body language. Words make up less than 10% of normal communication. So it’s no problem if misunderstandings occur. Without facial expressions, tone, and body language, misunderstandings are part of the process. That’s why I ask questions, and that’s fine. (Please imagine a smiling emoji here.)
At first, I misunderstood:
Stone82 schrieb:So I thought that a central system was originally planned and the general contractor (GC) now wanted a decentralized one.
The house upgrade includes a decentralized ventilation system, special soundproof windows, soundproof insulation for the roller shutter boxes, and a soundproofing expert.
Of course, with additional costs.
However, I’m not very satisfied with the decentralized ventilation system and believe a central system would be better.
Okay. If no ventilation was planned at the beginning and now the choice is between central and decentralized, here is my opinion on the matter:
A good central ventilation system has several features that a decentralized one does not offer to the same extent (heat recovery in winter; with an enthalpy exchanger, it can maintain comfortable humidity levels in winter. At the same time, some ventilation systems have good programming options to automatically reduce heat during summer).
Therefore, if the budget allows, I would plan with a central ventilation system.
PS: Here we only have words. No facial expressions, tone of voice, or body language. Words make up less than 10% of normal communication. So it’s no problem if misunderstandings occur. Without facial expressions, tone, and body language, misunderstandings are part of the process. That’s why I ask questions, and that’s fine. (Please imagine a smiling emoji here.)
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nordanney24 Jul 2025 19:19Stone82 schrieb:
EV40 house with timber frame construction.
We deliberately chose window ventilation closures. That works? Someone must be calculating quite creatively.
Stone82 schrieb:
as a decentralized ventilation system. Not just one. That’s about half a dozen units. Each unit requires a 150-180 mm (6-7 inch) duct in the wall. You don’t want that. It will definitely get quite loud inside the house.
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