Do you mean Nordly? In your example, €2,000 would be a nice contribution for the builder and rework would be more expensive for the craftsman. Remove tiles, replace screed or simply fill up again, new covering, adjust floor height to the other rooms In that case pay yourself and take the €2,000 or sue? Is it allowed to claim the guarantee if you take legal action? (just out of interest) If you have a good craftsman who takes pride in his work, he will come whether it is the skirting board that is loose or something bigger.