What's the ideal concrete thickness for concrete slab floors?

Abdulkadir Al-Jazari
Abdulkadir Al-Jazari
Updated: March 28, 2025
  • Concrete Thickness: I'm seeking guidance on the ideal concrete thickness for a non-structural concrete floor designed to harness thermal mass advantages.
  • Slab Foundation: This concrete floor is not intended as a structural slab foundation. Should I directly design it as a traditional slab foundation? In this case, the thickness would be around 4-to-6 inches.
  • Floor Sandwich Structure: I'd like to understand how the layers of the floor system should be structured for this particular design. What components should be included, and in what order?
  • Insulation Placement: Where should I incorporate insulation within the floor system to optimize thermal performance while preserving the thermal mass properties of the concrete?

Are there any real-world examples of similar designs? These would be invaluable for gaining a better understanding of how to approach this.

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