The slab heating cable sits in the middle of concrete pour. Here are the layers for this application from bottom to top:
- 8-10" of compressed crushed rock aggregate
- 2" polystyrene insulation
- 2 - 3" layer of concrete
- Rebar and/or reinforcing mesh
- Attach slab heating cable to rebar/mesh
- Final layer: 2-3" or concrete as final flooring surface
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