What is the R-Value of TVM Reflective Insulation?
R-Value indicates resistance to heat loss, and measures a mass insulation’s ability to slow down the transfer of heat. R-Values indicate how well a product absorbs and retains heat energy, not how well it redirects it. Reflective insulation works by reflecting heat energy back in the direction of its source, and it’s true performance is not measured by the R-Value. Just as the absorbency of a raincoat is unrelated to its ability to repel water, the R-Value of reflective insulation is not fully indicative of its ability to insulate, and redirect heat energy. The ASTM C236-1224 tests that determine a product’s R-Value yield the following results for TVM Reflective Insulation: Down = R-15.2 Up = R-6.8 Horizontal = R-8.5 NOTE: These results are based on a nominal 2″ x 4″ enclosed wall cavity that has reflective insulation installed in the middle of the structure, between studs. All materials have three separate R-Values, as above, depending on the direction of heat flow. Many insulation ma
