What feature differentiates XPS insulation from other types?

XPS, or extruded polystyrene insulation, is specifically known for its exceptional water resistance, which is a key characteristic that sets it apart from other types of insulation. This quality makes it particularly suitable for applications where moisture is a concern, such as in foundations, below-grade applications, and areas with potential exposure to water. The closed-cell structure of XPS not only provides thermal resistance but also prevents water vapor from penetrating the material, effectively maintaining its insulating properties even in damp environments.

Other types of insulation might not offer the same level of water resistance; for example, fiberglass insulation can absorb water, leading to reduced effectiveness and potential growth of mold. This unique feature of XPS insulation ensures durability and reliability in various building applications, making it a preferred choice for construction projects where moisture is a risk factor.