What is the R-value of EPS sheets per inch?

Extruded Polystyrene (EPS) sheets typically have an R-value of approximately 4 per inch of thickness. The R-value is a measure of thermal resistance, indicating how well insulation can resist heat flow; the higher the R-value, the better the insulation's effectiveness. EPS is commonly used in building insulation applications due to its favorable balance of cost, insulation performance, and moisture resistance.

Understanding the R-value of EPS sheets is crucial for determining how effective they will be at insulating a particular space, which can impact energy efficiency and comfort levels in a building.