Construction costs are currently skyrocketing

1 cbm is really extremely little as ready-mixed concrete. That is more like an amount for the trailer or as a Big Bag.

I will push my required 2m³ through the mixer....4t gravel 125€ including transport and the pallet of cement was 145€

Stupid question... Since when do you have to pay a €4 "wear and tear fee" for a pallet of bricks? After 2 deliveries, the pallet is already paid off...

Hasn't it always been the case that you invoice significantly more than you get paid? Aside from the fact that you also have to be able to return any special pallets ;)

Haven't ordered stones yet... The deposit is 25€, of which 21€ is refunded... 4 euros are supposed to be a wear and tear fee... If you take a pallet of saddles, it costs 8€... So after at most 2 deliveries, there will be a profit made here... Madness

Quick side question - If I want to extend the pipes of a multi-utility entry, what approval does the pipe need? Or is Kabuflex R Plus also acceptable?

Thanks

For example, with a Doyma Quadro Secura, I would take the Kabuflex R Plus 75, then extend it with the Doyma double socket sleeve. Alternatively, the rigid cable protection pipe from Doyma (very expensive). For the Kabuflex there are corresponding seals that are tight up to 0.5 bar. I used the Kabuflex R Plus 40, but shortly before the multi-utility entry, I pulled the cable out of the conduit again and routed it into the house through the seal.
The approval of the pipe is less of an issue; the question is always how you ensure the extension joint remains permanently sealed. I would try to avoid moving the sealing point far away from the house entry, because that increases the risk that there could be a leak somewhere in the extension.

I just installed my multi-utility entry last week; it was quite interesting, so I looked into it a bit.

Why do you actually want to extend the pipe?