Thickness / Discussions

I am building a concrete radiant floor system for a new build in Quebec. The contractor will build a floating slab with footings. The contractor is suggesting 2 inches of insulation and 3 inches of concrete, which seems too little base on what I have read. What do you recommend the thickness to be for the insulation an...

...thickness. I wouldn’t be in a position to speak to what performance statistics an individual manufacturer claims on their site, but the generally accepted permeability of foam is that at 2 inches it performs about like a Type II vapor barrier. Read more here about the characteristics and applications of different types...

How would you determine the thickness for a new construction of a slab on grade that will have only liquid forces acting down on it? Not sure what you mean by liquid forces, but a slab will perform differently depending many issues such as soil quality and bearing capacity. Slabs are most often edge loaded (where the l...