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  2. Styrofoam is a trademark name for XPS; the R-value of Styrofoam is 5.2 per inch since it is a high-density XPS.
    learnmetrics.com/rigid-insulation-r-value-per-inch-e…
    Foam board insulation has around 3.5-5.5 R-value for every inch. However, these numbers may vary according to the variation of the original product being used.
    airflowacademy.com/rigid-foam-board-insulation-r-…
     
  3. What Is the R-Value of Foam Board Insulation? (With Chart)

  4. Insulation R-Value Chart: R-Values Per Inch (For 51 …

    WEBThe range of R-values of insulation materials spans from materials with R-10 insulation values per inch like vacuum insulated panels and silica aerosol to below R-1 values per inch like bricks, glass, and poured concrete.

  5. Rigid (Foam Board) Insulation R-Value: Chart & FAQ

    WEBNov 16, 2022 · Foam board insulation has around 3.5-5.5 R-value for every inch. However, these numbers may vary according to the variation of the original product being used. Keep on reading if you plan on learning a …

  6. All About Insulation R-Values - The Home Depot

  7. Rigid Insulation R-Value Per Inch (+ EPS, XPS, ISO

    WEBR-values for rigid insulation vary from R-3.85 to R-6.8 per inch of thickness. Polyiso has the highest R-value, followed by XPS and EPS. The key to all rigid insulation high R-values are small air pockets that exhibit high …