Yes, I understood that, but it does not change the fact that the procedure does not comply with any standard. I assume the cable was not protected against the additional heat from the underfloor heating? Or a special cable, which according to the manufacturer allows installation in the heating screed, was used?
However, I would also leave that to the professional
As a layman, I am always amazed by the experts! DIN 18015-3 is actually clearly formulated. Even from the screed perspective (I am not familiar with the standards, only a leaflet), something like this is clearly not permissible. However, to be honest, I am not sure whether such standards and leaflets and guidelines and the like represent a mandatory requirement or just a suggestion and the professionals can actually do whatever they want. Or in other words: What does the professional owe the private customer/buyer if nothing else has been agreed upon?
The specialist is always obliged to deliver according to the recognized state of the art. These do not necessarily have to comply with the DIN standard; unless it is a binding contractual component ... which I personally would _not_ recommend.
Rhenish greetings from the road
Construction expert
Yes, I understood that. Was the screed completely cut through down to the insulation underneath? Or just a groove on top of the screed?
If he had cut through completely, the heating would probably have been affected as well.
I would cut into the insulation, maybe remove a narrow strip, then lay 2 cables (5 x 2.5 and 3 x 2.5) in a conduit in the insulation, and then put the strip back in as well as possible and seal tightly with tape, that’s enough.
35 degrees don’t affect the cable; you don’t have to worry about bigger issues...