ᐅ Noise protection according to DIN 4109

I have a question regarding the residential development area. Does the following also apply to single-family houses? The residential area is designated for detached and semi-detached houses.

From the regulations:
Requirements for special facilities and measures to protect against harmful environmental impacts according to the Federal Immission Control Act (§ 9 para. 1 no. 24 Federal Building Code)
Within the planning area, the external components of buildings must at least meet the following sound insulation requirements according to DIN 4109 (January 2018 edition) to protect against external noise for the noise level zone III specified in the plan:

Noise level zone LPB III
Relevant exterior noise level: 61 – 65 dB(A)
Required resulting sound insulation value for
a) office rooms: 30 dB(A)
b) living rooms in dwellings: 35 dB(A)

Proof of the required resulting sound insulation values must be provided based on DIN 4109, introduced as a Technical Building Regulation, in the 2018 version.

Within the planning area, the external components of rooms used for sleeping must at least meet the following sound insulation requirements according to DIN 4109 (January 2018 edition) to protect against external noise for the night zones 1 and 2 specified in the plan:

Night zone 2
Relevant exterior noise level: 66 – 70 dB(A)
Required resulting sound insulation value for sleeping rooms in dwellings: 40 dB(A)

Found on the internet:
In the private sector, without agreement, there are no legally binding regulations regarding the dimensioning of structural sound insulation. However, for apartments in multi-story buildings, semi-detached single-family houses, and single-family terraced houses, DIN 4109 – sound insulation in building construction – defines the minimum building acoustic requirements that must always be met under public law for the protection of health and human well-being.

Hello,

in your case, the zoning regulation is the agreement. So yes, it also applies to you if you buy a plot of land and want to build a single-family house.

Your online source probably refers to soundproofing between structurally connected neighbors – that is, multi-family houses. Semi-detached houses are supposed to be structurally separated anyway. So you should build in a way that does not disturb your neighbors.

The requirements in the development plan are meant to protect you, so you should follow them for your own benefit.
It seems there is a noise source near the building area.

mondbau schrieb:

Does the following also apply to single-family houses? The residential area is designated for single and semi-detached houses.

Yes, of course – otherwise it would be limited to multi-family houses (which, apart from typically being used for "up to 2 dwelling units," are generally considered as single-family homes or semi-detached houses).
In German, "exterior components" means external walls, windows, and roofs. You should equip these, at least on the sides of the house facing bedrooms or children's rooms, so that noise levels of up to 65 decibels only transmit with a residual noise level of 35 decibels to the inside.
In other words, it basically says, "build your house in a way that you won’t have to complain about the expected noise levels."
This is essentially a warning that a federal road, railway line, or similar source will still emit significant noise there.

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11ant schrieb:

So basically, it says "build your house in a way that you won’t have to complain about the expected noise levels."
This is essentially an indication that a federal road, railway line, etc., still generates quite a bit of noise in that area.

And you must also prove this mathematically. Depending on the authority, they may be more or less strict. Sometimes, a simple graph paper with a few calculations and your signature is enough; other times, the building permit / planning permission is only granted if a formal noise assessment prepared by an engineering firm, architect, or similar professional is submitted with the application.

The point is this: if you suffer from noise disturbance and your insurer tries to hold the municipality liable, they want to have protected themselves in time. This explanation serves that purpose. The responsibility is delegated to the builder to take protective measures. For example: a highway produces eighty decibels, a noise barrier reduces it to seventy, a protective forest further lowers it to thirty-six, but only thirty-five may reach the residential area; additional measures are therefore needed. On the property, these can only be measures on the building itself – so someone (practically the builder) must be obligated to carry them out. This is done through a regulation (in this case in the form of the zoning plan), publicly communicated with the publication of the zoning plan. This means the responsibility lies with the builder. Only if the noise exceeds the established 65 dB level can the builder complain – otherwise, not (or only themselves). That is the whole solution. It could have been simply stated that the builder must address this with windows, walls, and roofs – but in official language, these are collectively referred to as "external building components."

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