Northern monkey

Hi sorry if the question sounds daft - I want to have a single circuit ( one thermostat) ufh system downstairs and radiators upstairs on a different thermostat. there will be zone valves separating t he two (upstairs and down) im trying to understand the wiring required and I am wondering if I need a ‘multi zone controller’ or wether it can be done using the two thermostats wired to their respective zone valve so if heat is called from down then it opens down zone and operates boiler and then up valve stays closed etc i hope that makes sense and any help as always is appreciated. cheers

My considered options are a chipboard base on top of the kingspan then the ufh boards but that would raise my overall floor by 15mm or placing battons on the concrete floor - kingspan between then use the cement boards on top which should keep the level

https://www.thefloorheatingwarehouse.co.uk/acatalog/Grooved-Cement-Boards.html

To clarify I was hoping to use 18mm grooved cement boards

Good morning, I may have made a faux pas, we are having a new extension with new floor - we have the new concrete base 125mm lower than existing floor level - need 100mm kingspan for floor insulation and the master plan was to use low profile xps grooved panels for the ufh then tile on top. now you’ve all ready probably identified my problem, a) can I adhere the xps panels to the kingspan directly? And b) will it be strong enough? Or have I proper stuffed up and need to board over the kingspan first? thanks