R-value measures only the resistance to conduction and convection, but almost all of the energy lost in your home is through emission – radiant heat transfer. "E-value" (the ability to prevent radiant heat transfer) is far more important than R-value in evaluating an insulation system. eShield™ Attic Energy Barrier has a much higher E-value than any form of mass insulation.
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CONDUCTION
heat transfer through contact between solid objects |
CONVECTION
air circulates and passes heat from one object to another |
EMISSION
direct transfer from a radiant heat source like the sun |
