Rigid Insulation R Value Chart. 56 - 70 20. The R-value for FOAMULAR XPS insulation is provided from testing at two mean temperatures 40ºF and 75ºF and from two aging conditioning techniques 180 day real-time aged as mandated by ASTM C578 and a method of accelerated aging sometimes called Long Term Thermal Resistance LTTR per CANULC S770-03.
Spot and seal any leaks for best results. Insulation or other Building Material 9. Polyiso Rigid Insulation R Value Chart.
The R-value at 180 day real-time.
-- 087 Wood Drop 1in. Youre eager to improve the comfort of your home and R-value youve been told is your first stop. What R-Value For Attic Insulation. The common denominator among varieties of insulation is the R-value.