How Time Impacts the Insulation Performance of XPS, EPS, and Polyiso Foam Boards

Rigid foam boards—extruded polystyrene (XPS), expanded polystyrene (EPS), and polyisocyanurate (polyiso)—are widely used in home insulation for their excellent thermal performance and versatility. However, like all building materials, their insulation efficiency can degrade over time due to a few key factors. In this article, we’ll explore these factors and compare how they affect the long-term […]