What are the red and blue plastic shapes under this tile?

uknick

The kitchen has water underfloor heating. A tiler took up the old tile this morning but left me to cut a channel to feed the cables to their new location, which happens to be by the red item, as he didn't want to risk catching the heating system. I did the work with an old very, very blunt wood chisel and light hammer doing about a cm at a time. Luckily I don't need to go lower than I have done to fit the cables under the new tile.

The cables are for a kitchen island powering the hob and wine cooler. The tile needed to come out because the new kitchen island has a breakfast bar which exposes the cables. The original island had cupboards over the cable.

grumpy_codger

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uknick

Could very well be, but without the heating pipes as I've now learnt they should not put pipes under kitchen units. I assume the one that looks blue has actually been stained by the concrete.

sheenas

You should be running the cables in trunking as cement does not play nicely with cables. Further you don’t say what kind of hob. Electric hob might cause you issues with overheating.

uknick

The exposed cables you can see will be covered in trunking before the tile goes back down. It's an induction hob which has been in place since the house was built 13 years ago. I just confirmed the heating pipes don't go under that tile, or any of the units.

Apart from the underfloor heating, why else might there be a overheating issue?

FreeBear

https://forums.moneysavingexpert.com/discussion/comment/82172512#Comment_82172512

Steel capping is not the same as trunking.
Should also point out that cables should be buried at least 50mm below the surface to reduce the risk of damage from someone drilling holes in the floor. And you shouldn't be abusing a wood chisel to hack out screed - Wrong tool for the job and will elicit the ire of many woodworkers (and me too).