F
firekill
hi guys , I'm currently doing a kitchen & utility complete renovation and laying a new floor ready for ufh , I've laid the mot , sand binding , DPM & 100mm of concrete for sub base . Got 90mm foil backed pir board for insulation layer and having a 65/75 sand & cement screed with fibres , now I was going to just lay the boards down straight ontop of the concrete but read somewhere about fixing them down with flexible tile adhesive or just laying them on top of another layer of dpm over the concrete , also as it's gonna be a dry screed do I need any membrane over the insulation/ufh before screening or not. Not done wet ufh before and want to get it right first time.