How thick should the concrete be installed over radiant heating?
The thickness of concrete is dependent on what the building code or the designer dictates. A thicker slab takes longer to warm up than a thinner slab, but it also takes the thicker slab more time to cool down. It is best practice to not install normal concrete less than three-inches thick. Thinner pours can be done on top of radiant floor heating systems. Check building plans for what is required by code. Pouring a thin set concrete or gypsum in conjunction with a radiant floor heating system is possible.