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Pros and Cons of EPS and XPS

Pros and Cons of EPS and XPS

Pros:

  • Recyclable products that assist with LEED points.
  • Won’t support mold or mildew growth.
  • Long-term, stable R-value.
  • Can be placed below grade.
  • Can be utilized for inverted assemblies (over membrane).

Cons:

  • Exposure to sun will deteriorate the product.
  • Solvents/solvent-based materials cause irreversible damage.
  • Elevated temperatures (above 250 degrees F.) will “melt” polystyrene.
  • Incompatible with certain thermoplastics, polystyrene insulation’s are known to draw plasticizers out of thermoplastic membranes, causing permanent degradation.
  • Polystyrene is flammable, requiring proper placement in any assembly.

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