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Oldshield26 Nov 2015 11:39Hello everyone 🙂
I have a small problem and hope someone can help me.
Our project is a semi-detached house with three units each. The foundation slab is cast in one piece, and the basement will be constructed as a waterproof concrete structure (“white bathtub” method). The building is being done using precast elements from the company H+L Baustoffwerke GmbH. So far, so good. Our building inspector has now criticized that the joint between the two houses in the basement area was filled with concrete, which creates a sound bridge. This issue was raised with our site manager (and H+L). H+L’s response was that they always do it this way and that only by doing so can they provide the warranty for the waterproof concrete structure. They offered that if we accept this (with signature), they will upgrade the upper floors to an enhanced sound insulation level at no additional cost.
What do you think? Are they trying to take advantage of us?
I have a small problem and hope someone can help me.
Our project is a semi-detached house with three units each. The foundation slab is cast in one piece, and the basement will be constructed as a waterproof concrete structure (“white bathtub” method). The building is being done using precast elements from the company H+L Baustoffwerke GmbH. So far, so good. Our building inspector has now criticized that the joint between the two houses in the basement area was filled with concrete, which creates a sound bridge. This issue was raised with our site manager (and H+L). H+L’s response was that they always do it this way and that only by doing so can they provide the warranty for the waterproof concrete structure. They offered that if we accept this (with signature), they will upgrade the upper floors to an enhanced sound insulation level at no additional cost.
What do you think? Are they trying to take advantage of us?
O
Oldshield26 Nov 2015 12:17Here is a picture of it.
What you can expect regarding sound insulation depends on the contractually guaranteed quality agreement, which specifies certain sound insulation values for the individual floors/components, etc. For example, this can be based on a detailed component structure with either standardized, verified sound insulation values or custom component designs with sound insulation certification.
In your case, reduced sound insulation values are to be expected for the basement/ground floor, which can be improved again on the upper floor. As mentioned, it depends on what was originally agreed upon.
In your case, reduced sound insulation values are to be expected for the basement/ground floor, which can be improved again on the upper floor. As mentioned, it depends on what was originally agreed upon.
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Oldshield26 Nov 2015 12:35Thank you for the response. Soundproofing was agreed upon according to DIN 4109, although I have read various Federal Court of Justice rulings and understand them to mean that DIN 4109 does not reflect the current state of the art. The client has a right to enhanced soundproofing regardless of the contract, as explained in Annex 2 to DIN 4109.
We have a semi-detached house with a waterproof concrete shell ("white tank"). Nothing was concreted together; instead, two completely separate waterproof shells were built side by side. There is no connection between them.
Waterproof concrete shells can also be constructed separately – whether he is trying to deceive you or not, I have no idea.
Waterproof concrete shells can also be constructed separately – whether he is trying to deceive you or not, I have no idea.
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