What rigid foam insulation types are most commonly used in construction projects?

The most common rigid foam insulation types include EPS (expanded polystyrene), XPS (extruded polystyrene), and PIR (polyisocyanurate). EPS foam board is known for its affordability and versatility, XPS foam board offers higher compressive strength and moisture resistance, while PIR foam board provides the highest R-value per inch among common rigid insulation materials. Each type of rigid foam insulation is selected depending on the application requirements and environmental conditions.


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