Expanded polystyrene (EPS) boards generally have a higher water absorption rate compared to extruded polystyrene (XPS) boards. This means that EPS is more prone to moisture absorption, which can be a significant drawback in certain applications. When insulation materials absorb water, their thermal performance is negatively affected. Specifically, as the water absorption increases, the thermal conductivity of the material also rises, leading to a decrease in insulation efficiency. This is a critical factor to consider when selecting insulation materials for construction projects, especially in areas with high humidity or potential for water exposure. Proper waterproofing and installation techniques are essential to maintain the long-term effectiveness of EPS insulation.
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