New kitchen install over existing wet underfloor heating

[slartybartfast]

Screed will be 100mm thick, and UFH pipes will be at the base of that and 15mm diameter. So no reason why you can chase down 50 - 70mm or so to accommodate new cables. Also with use of a thermal camera you may well be able to get between the UFH pipes.

 

[brianmoooore]

Screed will be 100mm thick, and UFH pipes will be at the base of that and 15mm diameter. So no reason why you can chase down 50 - 70mm or so to accommodate new cables.

I've fitted plenty of wet UFH systems, and the screed is normally 60 - 65mm thick. The pipes are on the surface of this, so nominally the top of the pipes is about 45 - 50mm below the surface. I leave the pipes all carefully clipped down on the insulation, but after the builder's labourers have clomped all over in their size 12s with barrow loads of screed, I wouldn't guarantee anything more than 30mm.
I've also fitted UFH under chipboard floors, and in these cases the pipes are immediately under the board.
It would be a good idea to go for the kind of kitchen units that sits on exposed decorative legs, rather than those with kickboards.

 

[davesparks]

Screed will be 100mm thick, and UFH pipes will be at the base of that and 15mm diameter.

Unless you have first hand knowledge of the specific building being discussed here how can you be so certain of this?

 

[slartybartfast]

Unless you have first hand knowledge of the specific building being discussed here how can you be so certain of this?

Good point...just going by personal experience on best practice having been through some renovation projects. However, thickness doesnt really matter as even if its as thin as, say, 50mm, with use of a thermal camera and careful grinding, it will be possible to create a channel to take some low profile conduit.

 

[davesparks]

Good point...just going by personal experience on best practice having been through some renovation projects. However, thickness doesnt really matter as even if its as thin as, say, 50mm, with use of a thermal camera and careful grinding, it will be possible to create a channel to take some low profile conduit.

But you want to avoid having the cables in the heated screed otherwise you end up with much bigger cables.

 

[brianmoooore]

Screed temperature should only be a maximum of 30 odd degrees, set by the UFH mixing valve, so the increase in cable sizes isn't that great.

 

[Zlodej]

Have you asked the person who did the underfloor heating if they have a picture of it before screeding?
It is a common think they do for multiple reasons. This would give you reference points.
I wouldn't vory about heat much as any competent sparky would figure that-one easily out...