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Other Construction Applications

Below-grade insulation, sheathing, siding underlayment & other wall applications.

  • EPS vs. XPS Below-Grade Test

    In a 15-year real world test, EPS & XPS were placed into service as vertical wall insulation separating the heated building foundation from soil.

  • EPS vs. XPS Below-Grade Test

    The results of the test are dramatic. The EPS insulation maintained 94% of its stated R-Value of 3.6 and had a moisture content of only 4.8%. XPS retained only 52% of its stated R-value. The loss can be explained by the 18.9% moisture absorption over the 15 years or use.