ᐅ Solid wood parquet on underfloor heating

If I wanted to know exactly, I would ask for the thermal resistance value, which, by the way, was precisely what Lieblingsheinz requested as the lambda value, and we had also used that for the decision-making process in advance.

Does that mean Heinz von Heiden (who I am also building with) "forced" you to provide the value for the heating load calculation? I’m surprised, as they usually don’t give the homeowner anything besides the building permit/planning permission plans—“You won’t get anything” and so on.

HoisleBauer22 schrieb:

I’m surprised because they basically don’t want to give the builder any plans beyond the building permit / planning permission documents… “You won’t get anything,” and so on.

Keyword consumer construction contract = legal OBLIGATION to hand over all necessary documents. This is not something open for discussion.

Unfortunately, only those plans are considered "necessary" that are required "to provide evidence to the authorities that the construction complies with public regulations." For example, this does not even include detailed electrical installation plans. The official explanation is: "The electrician does not create plans. Go to the construction site and take photos." So, you won’t get plans showing exactly where the underfloor heating water pipes run, either. But that is another topic. I don’t want to divert further from the main subject of this thread.

In our case, when we were still planning on our own, we also decided on the flooring, taking into account the thermal transmittance value, density, and so on. We have bare glued oak floorboards on the floor, covering about half of the house.
At some point, the heating planner from Heinz von Heiden called, saying they needed the lambda value. At first, I didn’t even know what that was. I had, however, already submitted the thermal transmittance value well in advance.
For the electrical work, we have a photo album, and for the loops of the underfloor heating, at least a useful photo documentation, but sometimes something was covered up before we could document it. I can only recommend documenting everything. We were also frequently told that there were no exact plans for much of the work.
Best regards, Gabriele

HoisleBauer22 schrieb:

Unfortunately, only those plans are considered "necessary" that are required "to prove to authorities that the construction complies with public law regulations."

That is not entirely correct. All plans that may be needed later for maintenance and repairs must be provided. This includes electrical plans as well as heating system design and layout. These documents mainly stem from legal rulings related to consumer construction contracts but are definitely performance-related records that must be handed over.