Sound insulation between floor slabs incorrectly executed

Hello everyone,
I am building a semi-detached house which stands on its own slab. Now that the shell including windows and roof is in place, the site manager noticed that the two slabs are connected with a rigid foam (which was apparently used when pouring the slabs). Otherwise, mineral wool has been used between the houses.

Allegedly, this affects sound insulation, but no one can quantify the resulting defect in this condition.

Important: this defect will be recorded in the documentation and must be reported in case of a potential house sale.

Cutting through between the houses and removing all intermediate contents would cost €15,000.

The construction company offers me compensation of €500 for this and gives me 24 hours to consider.

Is that too little?

Looking forward to quick responses and thanks in advance!

Cutting through between the houses with removal of all intermediate contents would cost €15,000.

The construction company offers me compensation of €500 for this and gives me 24 hours to consider.

Without even remotely evaluating the defect: I think the cost-to-compensation ratio of 30:1 clearly says that you should first say no. This will definitely go into further rounds ;-)

Hello, thank you for the response.

I also once asked an expert, he said the damage can only be quantified when the house is already finished. But he wants about €800 just for the investigation :(
The construction company says that such sawing through is not necessary at all, you could just pull out the insulation boards.
Has anyone perhaps had similar experiences?

Damage 15,000 euros + compensation 500 euros I would initially politely decline. Plus 24 hours to think it over, no thanks... that's so cheeky, I would already insist on rectifying the damage... It may be that no one cares later. But it could be that you hear every step from the neighboring house later. In that case, 500€ for lifelong noise disturbance would clearly be too little...

The repair of the damage by my construction manager is probably a joke.... I have never heard anything like this or I am too incompetent to recognize the supposed genius behind it: They want to cut out two aerated concrete blocks from the inside of the house every 5 meters in order to then pull out the foils. and then press in new aerated concrete blocks again (however that is supposed to work). All well and good as long as the house doesn't simply collapse, right? You can only understand the construction workers with pictures, as they probably come from Albania / Kosovo or similar... no offense to these countries, but I estimate the employees' expertise to be negligible.

I find the relationship between defect remedy and compensation highly interesting.

Otherwise, I see no defect: as far as I believe I understand it, the houses stand on separate floor slabs, under which a continuous layer of insulation boards lies. Where do you see a defect there, i.e., which unwanted effects do you expect?

A defect would rather be if the seal against groundwater ingress in the joint between the two houses were / would be compromised.