These materials have a typical R-value of about R-5 to R-6 per inch, though when installed with a radiant surface (that might help) and a 3/4" air gap, the R-value is increased substantially - as we detail below. Fiberglass batts, which are still most-widely used in residential con...
Nevertheless, when discussing the use of concrete as insulation, it is important to highlight that a lower thermal conductivity value indicates better insulation properties. Adding Expanded Polystyrene (EPS) beads to the concrete matrix changes the density and thermal conductivity relationship (Figure 7...