Problem with wet under flooring heating concrete floor - where to start

[Galliano]

We have wet underfloor heating in our kitchen. It was installed before we bought the house. In three places - near the sink and in two room corners - the concrete is all uneven and riding up to the extent it has pushed all the flooring (amtico) up. We know it needs sorting and are resigned to a substantial bill but I don’t even know what trade to start with. Any ideas as to why this is happening and who to call? The heating works and there is a bit of a trend in the house of jobs having been done with economy as a big priority so suspect any possible corners were cut as part of the installation

thanks in advance

Do you have a leak? It’s unusual for concrete to be coming up otherwise unless it’s buckling through movement or a leak. I’m struggling to see it.
Can you take upload a photo?

Would be very unusual to have a leak as the pipes contain no joins underground, but they could be damaged if someone drilled into the floor to install something like a middle island. . Can you find out who did the work on the original underfloor heating? Underfloor heatings great, but you need the correct screed and thickness, it’s also recommended to use a decoupling matt (allows for movement). The floor has to dry for weeks before you can lay finished flooring such as tiles etc and you need the correct grout or glue depending on flooring chosen and these need to be suitable for underfloor heating. Even when the flooring has been laid you’ll have to commission the floor, which means heating up slowly again over a couple of weeks as to not shock the floor otherwise it will crack. There’s probably more to it, but that’s some of the basics. If you could find out who installed, that would help determine what and how it was done. Also, was this installed recently or been down for years.

The UF heating will be connected to a sealed heating system. The first place to start would be to keep an eye on the pressure gauge. Are you losing pressure frequently and are you having to top up the heating circuit via a filling loop? If not then it's unlikely to be linked to a leak on the heating so you won't need either plumber or heating engineer.

If you are losing pressure then you can close down the individual circuits until you are no longer losing water to find out which circuit it is. This would require closing both valves on the manifold.

If it's definitely the floor beneath the Amtico that's moving then unfortunately you're probably going to need a builder to do a bit of digging to find out what is going on.

Thanks for these responses. No loss of pressure etc. We have had a couple of incidents of the floor getting heated up rapidly to a hideous degree due to a valve failure so I wonder if it that’s damaged the concrete then.