We are building a new house, we have a bit of an issue / query for the floor construction and was wondering if anyone had come across it had a solution.
Basically the ground floor will be a solid slab with underfloor heating. So we have a finish which is a 75mm reinforced screed. But we want to get 300mm of insulation into the floor and are wondering where its best to put it. Has anyone put 300mm of insulation under a floor screed. I'm just worried about the potential of crack due to compression and movement of that much insulation.
I'm thinking the best solution is to have 200mm insulation then a floor slab then 100mm of concrete followed by the screed.
Any help much appreciated. Confused